www.usgs.gov Open in urlscan Pro
2600:9000:21f3:8800:1b:8180:81c0:93a1  Public Scan

Submitted URL: http://vulcan.wr.usgs.gov//glossary//platetectonics//description_plate_tectonics.html
Effective URL: https://www.usgs.gov/observatories/cvo
Submission: On July 23 via api from US — Scanned from DE

Form analysis 16 forms found in the DOM

GET /search

<form class="views-exposed-form usa-form" data-drupal-target-view="search-page_results" data-drupal-selector="views-exposed-form-search-page-results" action="/search" method="get" id="views-exposed-form-search-page-results" accept-charset="UTF-8"
  novalidate="">
  <div class="form-item js-form-item form-type-textfield js-form-type-textfield form-item-keywords js-form-item-keywords form-no-label">
    <input placeholder="Search" data-drupal-selector="edit-keywords" type="text" id="edit-keywords" name="keywords" value="" size="30" maxlength="128" class="form-text usa-input" aria-label="Input">
  </div>
  <div data-drupal-selector="edit-actions" class="form-actions js-form-wrapper form-wrapper" id="edit-actions"><label class="usa-sr-only">Label</label><input class="fas fa-search button js-form-submit form-submit usa-button" aria-label="Search"
      data-drupal-selector="edit-submit-search" type="submit" id="edit-submit-search" value=""></div>
</form>

GET /search

<form class="views-exposed-form usa-form" data-drupal-target-view="search-page_results" data-drupal-selector="views-exposed-form-search-page-results" action="/search" method="get" id="views-exposed-form-search-page-results" accept-charset="UTF-8"
  novalidate="">
  <div class="form-item js-form-item form-type-textfield js-form-type-textfield form-item-keywords js-form-item-keywords form-no-label">
    <input placeholder="Search" data-drupal-selector="edit-keywords" type="text" id="edit-keywords" name="keywords" value="" size="30" maxlength="128" class="form-text usa-input" aria-label="Input">
  </div>
  <div data-drupal-selector="edit-actions" class="form-actions js-form-wrapper form-wrapper" id="edit-actions"><label class="usa-sr-only">Label</label><input class="fas fa-search button js-form-submit form-submit usa-button" aria-label="Search"
      data-drupal-selector="edit-submit-search" type="submit" id="edit-submit-search" value=""></div>
</form>

<form class="usa-form" id="volcano-filters-desktop">
  <fieldset class="usa-fieldset" id="vscmmVolcanoStatusControls">
    <div class="usa-checkbox">
      <input class="usa-checkbox__input  btn-instrument vscmm-btn-category vscmm-btn-filters range" type="checkbox" name="" id="volCat4" onclick="volHazardsUI.toggleHazardCategory('NORMAL')" data-category-id="4" checked=""> <label
        class="usa-checkbox__label" for="volCat4"> <span class="alert-normal"></span> <span class="name"> NORMAL</span> <span class="badge volStatusBadge" style="float:right; display: inline-block;">13</span> </label>
    </div>
    <div class="usa-checkbox">
      <input class="usa-checkbox__input  btn-instrument vscmm-btn-category vscmm-btn-filters range" type="checkbox" name="" id="volCat5" onclick="volHazardsUI.toggleHazardCategory('UNASSIGNED')" data-category-id="5" checked=""> <label
        class="usa-checkbox__label" for="volCat5"> <span class="alert-unassigned"></span> <span class="name"> UNASSIGNED</span> <span class="badge volStatusBadge" style="float:right; display: inline-block;">15</span> </label>
    </div>
  </fieldset>
</form>

<form class="usa-form" id="age-fields-filters">
  <fieldset class="usa-fieldset">
    <div class="usa-radio" id="age2hr" style="display: none;">
      <input class="usa-radio__input btn-age vscmm-btn-quake vscmm-btn-filters range btn-default" id="2hr" type="radio" name="quakeAge" data-age="2hr" value="2hr" onclick="monQuakeUI.setAge('2hr', this)">
      <label class="usa-radio__label" for="2hr"><span class="circle-red"></span><span class="name">Last 2 Hours</span><span class="badge age-badge" id="2hrBadge">0</span></label>
    </div>
    <div class="usa-radio" id="age2day" style="display: none;">
      <input class="usa-radio__input btn-age vscmm-btn-quake vscmm-btn-filters range btn-primary" id="2day" type="radio" name="quakeAge" data-age="2day" onclick="monQuakeUI.setAge('2day', this)" value="2day" checked="">
      <label class="usa-radio__label" for="2day"><span class="circle-orange"></span><span class="name">Last 2 Days</span><span class="badge age-badge" id="2dayBadge">0</span> </label>
    </div>
    <div class="usa-radio" id="age2week">
      <input class="usa-radio__input btn-age vscmm-btn-quake vscmm-btn-filters range btn-default" id="2week" type="radio" name="quakeAge" value="2week" data-age="2week" onclick="monQuakeUI.setAge('2week', this)">
      <label class="usa-radio__label" for="2week"><span class="circle-yellow"></span><span class="name">Last 2 Weeks</span><span class="badge age-badge" id="2weekBadge">10</span></label>
    </div>
    <div class="usa-radio" id="age4week">
      <input class="usa-radio__input btn-age vscmm-btn-quake vscmm-btn-filters range btn-default" id="4week" type="radio" name="quakeAge" value="4week" data-age="4week" onclick="monQuakeUI.setAge('4week', this)">
      <label class="usa-radio__label" for="4week"><span class="circle-white"></span><span class="name">Last 4 Weeks</span><span class="badge age-badge" id="4weekBadge">35</span></label>
    </div>
    <div class="usa-radio monitoring-custom-date-radio" id="ageDate">
      <input class="usa-radio__input btn-age vscmm-btn-quake vscmm-btn-filters vscmm-btn-date-custom range btn-default" id="age-custom" type="radio" name="quakeAge" value="agecustom" data-age="custom" onclick="monQuakeUI.customDate(this)">
      <label class="usa-radio__label" for="age-custom"><span class="name date-range">Custom Date Range</span></label>
      <div id="monitoring-custom-date__wrapper" class="monitoring-custom-date monitoring-custom-date__wrapper">
        <label class="monitoring-custom-date__header" for="datepicker-start">Custom Start Date</label>
        <div class="monitoring-custom-date__subtext">mm/dd/yyyy</div>
        <div class="monitoring-custom-date__picker-start">
          <input type="text" id="datepicker-start" class="picker-start" name="picker-start" readonly="readonly">
        </div>
        <label class="monitoring-custom-date__header" for="datepicker-end">Custom End Date</label>
        <div class="monitoring-custom-date__subtext">mm/dd/yyyy</div>
        <div class="monitoring-custom-date__picker-end">
          <input type="text" id="datepicker-end" class="picker-end" name="picker-end" readonly="readonly">
        </div>
      </div>
    </div>
  </fieldset>
</form>

<form class="usa-form" id="mag_fields">
  <fieldset class="usa-fieldset">
    <div class="usa-checkbox" id="checkMag0" style="display: none;">
      <input class="usa-checkbox__input btn-mag vscmm-btn-quake vscmm-btn-filters range btn-primary" id="mag0" type="checkbox" name="mag0" data-mag="0" onchange="monQuakeUI.toggleMag(0)" value="" checked="">
      <label class="usa-checkbox__label" for="mag0"><span class="name">&lt; 1 M</span><span class="badge mag-badge" id="mag0Badge"></span> </label>
    </div>
    <div class="usa-checkbox" id="checkMag1" style="display: none;">
      <input class="usa-checkbox__input btn-mag vscmm-btn-quake vscmm-btn-filters range btn-primary" id="mag1" type="checkbox" name="mag1" data-mag="1" onchange="monQuakeUI.toggleMag(1)" value="" checked="">
      <label class="usa-checkbox__label" for="mag1"><span class="name">1 - 2 M</span><span class="badge mag-badge" id="mag1Badge"></span> </label>
    </div>
    <div class="usa-checkbox" id="checkMag2" style="display: none;">
      <input class="usa-checkbox__input btn-mag vscmm-btn-quake vscmm-btn-filters range btn-primary" id="mag2" type="checkbox" name="mag2" data-mag="2" onchange="monQuakeUI.toggleMag(2)" value="" checked="">
      <label class="usa-checkbox__label" for="mag2"><span class="name">2 - 3 M</span><span class="badge mag-badge" id="mag2Badge"></span> </label>
    </div>
    <div class="usa-checkbox" id="checkMag3" style="display: none;">
      <input class="usa-checkbox__input btn-mag vscmm-btn-quake vscmm-btn-filters range btn-primary" id="mag3" type="checkbox" name="mag3" data-mag="3" onchange="monQuakeUI.toggleMag(3)" value="" checked="">
      <label class="usa-checkbox__label" for="mag3"><span class="name">3 - 4M</span><span class="badge mag-badge" id="mag3Badge">5</span> </label>
    </div>
    <div class="usa-checkbox" id="checkMag4" style="display: none;">
      <input class="usa-checkbox__input btn-mag vscmm-btn-quake vscmm-btn-filters range btn-primary" id="mag4" type="checkbox" name="mag4" data-mag="4" onchange="monQuakeUI.toggleMag(4)" value="" checked="">
      <label class="usa-checkbox__label" for="mag4"><span class="name">4 - 5M</span><span class="badge mag-badge" id="mag4Badge">25</span> </label>
    </div>
    <div class="usa-checkbox" id="checkMag5" style="display: none;">
      <input class="usa-checkbox__input btn-mag vscmm-btn-quake vscmm-btn-filters range btn-primary" id="mag5" type="checkbox" name="mag5" data-mag="5" onchange="monQuakeUI.toggleMag(5)" value="" checked="">
      <label class="usa-checkbox__label" for="mag5"><span class="name">5 - 6 M</span><span class="badge mag-badge" id="mag5Badge">4</span></label>
    </div>
    <div class="usa-checkbox" id="checkMag6" style="display: none;">
      <input class="usa-checkbox__input btn-mag vscmm-btn-quake vscmm-btn-filters range btn-primary" id="mag6" type="checkbox" name="mag6" data-mag="6" onchange="monQuakeUI.toggleMag(6)" value="" checked="">
      <label class="usa-checkbox__label" for="mag6"><span class="name">6+ M</span><span class="badge mag-badge" id="mag6Badge">1</span> </label>
    </div>
  </fieldset>
</form>

<form class="usa-form" id="depth_fields">
  <fieldset class="usa-fieldset">
    <div class="usa-checkbox" id="checkDepth0-5" style="display: none;">
      <input class="usa-checkbox__input btn-depth vscmm-btn-quake vscmm-btn-filters range btn-primary" id="depth0-5" type="checkbox" name="" onchange="monQuakeUI.toggleDepth('0-5')" value="" data-depth="0-5" checked="" style="display: none;">
      <label class="usa-checkbox__label" for="depth0-5"><span class="name">&lt; 5km</span><span class="badge depth-badge" id="depth0-5Badge"></span> </label>
    </div>
    <div class="usa-checkbox" id="checkDepth5-10" style="display: none;">
      <input class="usa-checkbox__input btn-depth vscmm-btn-quake vscmm-btn-filters range btn-primary" id="depth5-10" type="checkbox" name="" onchange="monQuakeUI.toggleDepth('5-10')" value="" data-depth="5-10" checked="" style="display: none;">
      <label class="usa-checkbox__label" for="depth5-10"><span class="name">5 - 10km</span><span class="badge depth-badge" id="depth5-10Badge">1</span></label>
    </div>
    <div class="usa-checkbox" id="checkDepth10-15" style="display: none;">
      <input class="usa-checkbox__input btn-depth vscmm-btn-quake vscmm-btn-filters range btn-primary" id="depth10-15" type="checkbox" name="" onchange="monQuakeUI.toggleDepth('10-15')" value="" data-depth="10-15" checked="" style="display: none;">
      <label class="usa-checkbox__label" for="depth10-15"><span class="name">10 - 15km</span><span class="badge depth-badge" id="depth10-15Badge">33</span> </label>
    </div>
    <div class="usa-checkbox" id="checkDepth15-20" style="display: none;">
      <input class="usa-checkbox__input btn-depth vscmm-btn-quake vscmm-btn-filters range btn-primary" id="depth15-20" type="checkbox" name="" onchange="monQuakeUI.toggleDepth('15-20')" value="" data-depth="15-20" checked="" style="display: none;">
      <label class="usa-checkbox__label" for="depth15-20"><span class="name">15 - 20km</span><span class="badge depth-badge" id="depth15-20Badge"></span> </label>
    </div>
    <div class="usa-checkbox" id="checkDepth20" style="display: none;">
      <input class="usa-checkbox__input btn-depth vscmm-btn-quake vscmm-btn-filters range" id="depth20+" type="checkbox" name="" onchange="monQuakeUI.toggleDepth('20+')" value="" data-depth="20" checked="">
      <label class="usa-checkbox__label" for="depth20+"><span class="name">20+km</span><span class="badge depth-badge" id="depth20Badge">1</span> </label>
    </div>
  </fieldset>
</form>

<form class="usa-form" id="instrument-filters-desktop">
  <fieldset class="usa-fieldset" id="vscmmCategoryControls"></fieldset>
</form>

<form class="usa-form" id="currentLavaData">
  <fieldset class="usa-fieldset current-lava-data">
    <div class="usa-checkbox current-lava-checkbox" id="checkEruptiveVentPoints">
      <input class="usa-checkbox__input btn-current-lava" id="lavaEruptiveVentPoints" type="checkbox" name="" onchange="volHazardsUI.toggleCurrentLavaLayer('EruptiveVentPoints')" value="" data-depth="EruptiveVentPoints" checked="">
      <label class="usa-checkbox__label" for="lavaEruptiveVentPoints"><span class="name">Eruptive Vent Points</span></label>
      <span class="lava-legend-EruptiveVentPoints current-lava-legend"></span>
      <span class="lava-last-updated" id="lavaEruptiveVentPointsLastDate"></span>
    </div>
    <div class="usa-checkbox current-lava-checkbox" id="checkEruptiveFissureLines">
      <input class="usa-checkbox__input btn-current-lava" id="lavaEruptiveFissureLines" type="checkbox" name="" onchange="volHazardsUI.toggleCurrentLavaLayer('EruptiveFissureLines')" value="" data-depth="EruptiveFissureLines" checked="">
      <label class="usa-checkbox__label" for="lavaEruptiveFissureLines"><span class="name">Eruptive Fissure Lines</span></label>
      <span class="lava-legend-EruptiveFissureLines current-lava-legend"></span>
      <span class="lava-last-updated" id="lavaEruptiveFissureLinesLastDate"></span>
    </div>
    <div class="usa-checkbox current-lava-checkbox" id="checkFlowChannelLines">
      <input class="usa-checkbox__input btn-current-lava" id="lavaFlowChannelLines" type="checkbox" name="" onchange="volHazardsUI.toggleCurrentLavaLayer('FlowChannelLines')" value="" data-depth="FlowChannelLines" checked="">
      <label class="usa-checkbox__label" for="lavaFlowChannelLines"><span class="name">Flow Channel Lines</span></label>
      <span class="lava-legend-FlowChannelLines current-lava-legend"></span>
      <span class="lava-last-updated" id="lavaFlowChannelLinesLastDate"></span>
    </div>
    <div class="usa-checkbox current-lava-checkbox" id="checkFlowFrontPoints">
      <input class="usa-checkbox__input btn-current-lava" id="lavaFlowFrontPoints" type="checkbox" name="" onchange="volHazardsUI.toggleCurrentLavaLayer('FlowFrontPoints')" value="" data-depth="FlowFrontPoints" checked="">
      <label class="usa-checkbox__label" for="lavaFlowFrontPoints"><span class="name">Flow Front Points</span></label>
      <span class="lava-legend-FlowFrontPoints current-lava-legend"></span>
      <span class="lava-last-updated" id="lavaFlowFrontPointsLastDate"></span>
    </div>
    <div class="usa-checkbox current-lava-checkbox" id="checkFlowPolys">
      <input class="usa-checkbox__input btn-current-lava" id="lavaFlowPolys" type="checkbox" name="" onchange="volHazardsUI.toggleCurrentLavaLayer('FlowPolys')" value="" data-depth="FlowPolys" checked="">
      <label class="usa-checkbox__label" for="lavaFlowPolys"><span class="name">Flow Polygons</span></label>
      <span class="lava-legend-FlowPolys current-lava-legend"></span>
      <span class="lava-last-updated" id="lavaFlowPolysLastDate"></span>
    </div>
  </fieldset>
</form>

<form class="usa-form" id="lavaData">
  <fieldset class="usa-fieldset lava-data">
    <div class="usa-checkbox lava-checkbox" id="checkYearsAD1983to2018">
      <input class="usa-checkbox__input btn-lava" id="lavaAD1983to2018" type="checkbox" name="" onchange="volHazardsUI.toggleLavaLayer('AD1983to2018')" value="" data-depth="AD1983to2018" checked="">
      <label class="usa-checkbox__label" for="lavaAD1983to2018"><span class="lava-legend-AD1983to2018 lava-symbol"></span><span class="name">A.D. 1983 - 2018</span><span class="badge lava-badge" id="lava1983-2018Badge"></span> </label>
    </div>
    <div class="usa-checkbox lava-checkbox" id="checkYearsAD1951to1982">
      <input class="usa-checkbox__input btn-lava" id="lavaAD1951to1982" type="checkbox" name="" onchange="volHazardsUI.toggleLavaLayer('AD1951to1982')" value="" data-depth="AD1951to1982" checked="">
      <label class="usa-checkbox__label" for="lavaAD1951to1982"><span class="lava-legend-AD1951to1982 lava-symbol"></span><span class="name">A.D. 1951 - 1982</span><span class="badge lava-badge" id="lava1951-1982Badge"></span> </label>
    </div>
    <div class="usa-checkbox lava-checkbox" id="checkYearsAD1925to1950">
      <input class="usa-checkbox__input btn-lava" id="lavaAD1925to1950" type="checkbox" name="" onchange="volHazardsUI.toggleLavaLayer('AD1925to1950')" value="" data-depth="AD1925to1950" checked="">
      <label class="usa-checkbox__label" for="lavaAD1925to1950"><span class="lava-legend-AD1925to1950 lava-symbol"></span><span class="name">A.D. 1925 - 1950</span><span class="badge lava-badge" id="lava1925-1950Badge"></span> </label>
    </div>
    <div class="usa-checkbox lava-checkbox" id="checkYearsAD1869to1924">
      <input class="usa-checkbox__input btn-lava" id="lavaAD1869to1924" type="checkbox" name="" onchange="volHazardsUI.toggleLavaLayer('AD1869to1924')" value="" data-depth="AD1869to1924" checked="">
      <label class="usa-checkbox__label" for="lavaAD1869to1924"><span class="lava-legend-AD1869to1924 lava-symbol"></span><span class="name">A.D. 1869 - 1924</span><span class="badge lava-badge" id="lava1869-1924Badge"></span> </label>
    </div>
    <div class="usa-checkbox lava-checkbox" id="checkYearsAD1840to1868">
      <input class="usa-checkbox__input btn-lava" id="lavaAD1840to1868" type="checkbox" name="" onchange="volHazardsUI.toggleLavaLayer('AD1840to1868')" value="" data-depth="AD1840to1868" checked="">
      <label class="usa-checkbox__label" for="lavaAD1840to1868"><span class="lava-legend-AD1840to1868 lava-symbol"></span><span class="name">A.D. 1840 - 1868</span><span class="badge lava-badge" id="lava1840-1868Badge"></span></label>
    </div>
    <div class="usa-checkbox lava-checkbox" id="checkYearsAD1778to1839">
      <input class="usa-checkbox__input btn-lava" id="lavaAD1778to1839" type="checkbox" name="" onchange="volHazardsUI.toggleLavaLayer('AD1778to1839')" value="" data-depth="AD1778to1839" checked="">
      <label class="usa-checkbox__label" for="lavaAD1778to1839"><span class="lava-legend-AD1778to1839 lava-symbol"></span><span class="name">A.D. 1778 - 1839</span><span class="badge lava-badge" id="lava1778-1839Badge"></span> </label>
    </div>
  </fieldset>
</form>

<form class="usa-form" id="volcano-filters-mobile">
  <fieldset class="usa-fieldset font-12pt" id="vscmmVolcanoStatusControlsMobile">
  </fieldset>
</form>

<form class="usa-form" id="age-filters-mobile">
  <fieldset class="usa-fieldset fieldset-min-width font-12pt">
    <div class="usa-radio" id="age2hrMobile" style="display: none;">
      <input class="usa-radio__input btn-age vscmm-btn-quake vscmm-btn-filters range btn-default" id="2hrMobile" type="radio" name="quakeAgeMobile" data-age="2hr" value="2hr" onclick="monQuakeUI.setAge('2hr', this)">
      <label class="usa-radio__label" for="2hrMobile"><span class="circle-red"></span><span class="name">Last 2 Hours</span><span class="badge age-badge" id="2hrMobileBadge">0</span></label>
    </div>
    <div class="usa-radio" id="age2dayMobile" style="display: none;">
      <input class="usa-radio__input btn-age vscmm-btn-quake vscmm-btn-filters range btn-primary" id="2dayMobile" type="radio" name="quakeAgeMobile" data-age="2day" onclick="monQuakeUI.setAge('2day', this)" value="2day" checked="">
      <label class="usa-radio__label" for="2dayMobile"><span class="circle-orange"></span><span class="name">Last 2 Days</span><span class="badge age-badge" id="2dayMobileBadge">0</span></label>
    </div>
    <div class="usa-radio" id="age2weekMobile">
      <input class="usa-radio__input btn-age vscmm-btn-quake vscmm-btn-filters range btn-default" id="2weekMobile" type="radio" name="quakeAgeMobile" value="2week" data-age="2week" onclick="monQuakeUI.setAge('2week', this)">
      <label class="usa-radio__label" for="2weekMobile"><span class="circle-yellow"></span><span class="name">Last 2 Weeks</span><span class="badge age-badge" id="2weekMobileBadge">10</span></label>
    </div>
    <div class="usa-radio" id="age4weekMobile">
      <input class="usa-radio__input btn-age vscmm-btn-quake vscmm-btn-filters range btn-default" id="4weekMobile" type="radio" name="quakeAgeMobile" value="4week" data-age="4week" onclick="monQuakeUI.setAge('4week', this)">
      <label class="usa-radio__label" for="4weekMobile"><span class="circle-white"></span><span class="name">Last 4 Weeks</span><span class="badge age-badge" id="4weekMobileBadge">35</span></label>
    </div>
    <div class="usa-radio monitoring-custom-date-radio" id="ageDateMobile">
      <input class="usa-radio__input btn-age vscmm-btn-quake vscmm-btn-filters vscmm-btn-date-custom range btn-default" id="age-custom-mobile" type="radio" name="quakeAgeMobile" value="agecustom" data-age="custom"
        onclick="monQuakeUI.customDate(this)">
      <label class="usa-radio__label" for="age-custom-mobile"><span class="name date-range">Custom Date Range</span></label>
      <div id="monitoring-custom-date__wrapper-mobile" class="monitoring-custom-date monitoring-custom-date__wrapper">
        <label class="monitoring-custom-date__header" for="datepicker-start-mobile">Custom Start Date</label>
        <div class="monitoring-custom-date__subtext">mm/dd/yyyy</div>
        <div class="monitoring-custom-date__picker-start">
          <input type="text" id="datepicker-start-mobile" class="picker-start" name="picker-start" readonly="readonly">
        </div>
        <label class="monitoring-custom-date__header" for="datepicker-end-mobile">Custom End Date</label>
        <div class="monitoring-custom-date__subtext">mm/dd/yyyy</div>
        <div class="monitoring-custom-date__picker-end">
          <input type="text" id="datepicker-end-mobile" class="picker-end" name="picker-end" readonly="readonly">
        </div>
      </div>
    </div>
  </fieldset>
</form>

<form class="usa-form" id="mag-filters-mobile">
  <fieldset class="usa-fieldset font-12pt">
    <div class="usa-checkbox" id="checkMag0Mobile" style="display: none;">
      <input class="usa-checkbox__input btn-mag vscmm-btn-quake vscmm-btn-filters range btn-primary" id="mag0Mobile" type="checkbox" name="mag0Mobile" data-mag="0" onchange="monQuakeUI.toggleMag(0)" value="" checked="">
      <label class="usa-checkbox__label" for="mag0Mobile"><span class="name">&lt; 1 M</span><span class="badge mag-badge" id="mag0MobileBadge"></span></label>
    </div>
    <div class="usa-checkbox" id="checkMag1Mobile" style="display: none;">
      <input class="usa-checkbox__input btn-mag vscmm-btn-quake vscmm-btn-filters range btn-primary" id="mag1Mobile" type="checkbox" name="mag1Mobile" data-mag="1" onchange="monQuakeUI.toggleMag(1)" value="" checked="">
      <label class="usa-checkbox__label" for="mag1Mobile"><span class="name">1 - 2 M</span><span class="badge mag-badge" id="mag1MobileBadge"></span></label>
    </div>
    <div class="usa-checkbox" id="checkMag2Mobile" style="display: none;">
      <input class="usa-checkbox__input btn-mag vscmm-btn-quake vscmm-btn-filters range btn-primary" id="mag2Mobile" type="checkbox" name="mag2Mobile" data-mag="2" onchange="monQuakeUI.toggleMag(2)" value="" checked="">
      <label class="usa-checkbox__label" for="mag2Mobile"><span class="name">2 - 3 M</span><span class="badge mag-badge" id="mag2MobileBadge"></span></label>
    </div>
    <div class="usa-checkbox" id="checkMag3Mobile" style="display: none;">
      <input class="usa-checkbox__input btn-mag vscmm-btn-quake vscmm-btn-filters range btn-primary" id="mag3Mobile" type="checkbox" name="mag3Mobile" data-mag="3" onchange="monQuakeUI.toggleMag(3)" value="" checked="">
      <label class="usa-checkbox__label" for="mag3Mobile"><span class="name">3 - 4M</span><span class="badge mag-badge" id="mag3MobileBadge">5</span></label>
    </div>
    <div class="usa-checkbox" id="checkMag4Mobile" style="display: none;">
      <input class="usa-checkbox__input btn-mag vscmm-btn-quake vscmm-btn-filters range btn-primary" id="mag4Mobile" type="checkbox" name="mag4Mobile" data-mag="4" onchange="monQuakeUI.toggleMag(4)" value="" checked="">
      <label class="usa-checkbox__label" for="mag4Mobile"><span class="name">4 - 5M</span><span class="badge mag-badge" id="mag4MobileBadge">25</span></label>
    </div>
    <div class="usa-checkbox" id="checkMag5Mobile" style="display: none;">
      <input class="usa-checkbox__input btn-mag vscmm-btn-quake vscmm-btn-filters range btn-primary" id="mag5Mobile" type="checkbox" name="mag5Mobile" data-mag="5" onchange="monQuakeUI.toggleMag(5)" value="" checked="">
      <label class="usa-checkbox__label" for="mag5Mobile"><span class="name">5 - 6 M</span><span class="badge mag-badge" id="mag5MobileBadge">4</span></label>
    </div>
    <div class="usa-checkbox" id="checkMag6Mobile" style="display: none;">
      <input class="usa-checkbox__input btn-mag vscmm-btn-quake vscmm-btn-filters range btn-primary" id="mag6Mobile" type="checkbox" name="magMobile" data-mag="6" onchange="monQuakeUI.toggleMag(6)" value="" checked="">
      <label class="usa-checkbox__label" for="mag6Mobile"><span class="name">6+ M</span><span class="badge mag-badge" id="mag6MobileBadge">1</span></label>
    </div>
  </fieldset>
</form>

<form class="usa-form" id="depth-filters-mobile">
  <fieldset class="usa-fieldset font-12pt">
    <div class="usa-checkbox" id="checkDepth0-5Mobile" style="display: none;">
      <input class="usa-checkbox__input btn-depth vscmm-btn-quake vscmm-btn-filters range btn-primary" id="depth0-5Mobile" type="checkbox" name="" onchange="monQuakeUI.toggleDepth('0-5')" value="" data-depth="0-5" checked="" style="display: none;">
      <label class="usa-checkbox__label" for="depth0-5Mobile"><span class="name">&lt; 5km</span><span class="badge depth-badge" id="depth0-5MobileBadge"></span></label>
    </div>
    <div class="usa-checkbox" id="checkDepth5-10Mobile" style="display: none;">
      <input class="usa-checkbox__input btn-depth vscmm-btn-quake vscmm-btn-filters range btn-primary" id="depth5-10Mobile" type="checkbox" name="" onchange="monQuakeUI.toggleDepth('5-10')" value="" data-depth="5-10" checked=""
        style="display: none;">
      <label class="usa-checkbox__label" for="depth5-10Mobile"><span class="name">5 - 10km</span><span class="badge depth-badge" id="depth5-10MobileBadge">1</span></label>
    </div>
    <div class="usa-checkbox" id="checkDepth10-15Mobile" style="display: none;">
      <input class="usa-checkbox__input btn-depth vscmm-btn-quake vscmm-btn-filters range btn-primary" id="depth10-15Mobile" type="checkbox" name="" onchange="monQuakeUI.toggleDepth('10-15')" value="" data-depth="10-15" checked=""
        style="display: none;">
      <label class="usa-checkbox__label" for="depth10-15Mobile"><span class="name">10 - 15km</span><span class="badge depth-badge" id="depth10-15MobileBadge">33</span></label>
    </div>
    <div class="usa-checkbox" id="checkDepth15-20Mobile" style="display: none;">
      <input class="usa-checkbox__input btn-depth vscmm-btn-quake vscmm-btn-filters range btn-primary" id="depth15-20Mobile" type="checkbox" name="" onchange="monQuakeUI.toggleDepth('15-20')" value="" data-depth="15-20" checked=""
        style="display: none;">
      <label class="usa-checkbox__label" for="depth15-20Mobile"><span class="name">15 - 20km</span><span class="badge depth-badge" id="depth15-20MobileBadge"></span></label>
    </div>
    <div class="usa-checkbox" id="checkDepth20Mobile" style="display: none;">
      <input class="usa-checkbox__input  btn-depth vscmm-btn-quake vscmm-btn-filters range" id="depth20Mobile+" type="checkbox" name="" onchange="monQuakeUI.toggleDepth('20+')" value="" data-depth="20" checked="">
      <label class="usa-checkbox__label" for="depth20Mobile+"><span class="name">20+km</span><span class="badge depth-badge" id="depth20MobileBadge">1</span></label>
    </div>
  </fieldset>
</form>

<form class="usa-form" id="instruments-filters-mobile">
  <fieldset class="usa-fieldset font-12pt" id="vscmmCategoryControlsMobile"></fieldset>
</form>

<form class="usa-form" id="current-lava-filters-mobile">
  <fieldset class="usa-fieldset current-lava-data">
    <div class="usa-checkbox current-lava-checkbox" id="checkEruptiveVentPointsMobile">
      <input class="usa-checkbox__input btn-current-lava" id="lavaEruptiveVentPointsMobile" type="checkbox" name="" onchange="volHazardsUI.toggleCurrentLavaLayer('EruptiveVentPoints')" value="" data-depth="EruptiveVentPoints" checked="">
      <label class="usa-checkbox__label" for="lavaEruptiveVentPointsMobile"><span class="name">Eruptive Vent Points</span></label>
      <span class="lava-legend-EruptiveVentPoints current-lava-legend"></span>
      <span class="lava-last-updated" id="lavaEruptiveVentPointsLastDateMobile"></span>
    </div>
    <div class="usa-checkbox current-lava-checkbox" id="checkEruptiveFissureLinesMobile">
      <input class="usa-checkbox__input btn-current-lava" id="lavaEruptiveFissureLinesMobile" type="checkbox" name="" onchange="volHazardsUI.toggleCurrentLavaLayer('EruptiveFissureLines')" value="" data-depth="EruptiveFissureLines" checked="">
      <label class="usa-checkbox__label" for="lavaEruptiveFissureLinesMobile"><span class="name">Eruptive Fissure Lines</span></label>
      <span class="lava-legend-EruptiveFissureLines current-lava-legend"></span>
      <span class="lava-last-updated" id="lavaEruptiveFissureLinesLastDateMobile"></span>
    </div>
    <div class="usa-checkbox current-lava-checkbox" id="checkFlowChannelLines">
      <input class="usa-checkbox__input btn-current-lava" id="lavaFlowChannelLinesMobile" type="checkbox" name="" onchange="volHazardsUI.toggleCurrentLavaLayer('FlowChannelLines')" value="" data-depth="FlowChannelLines" checked="">
      <label class="usa-checkbox__label" for="lavaFlowChannelLinesMobile"><span class="name">Flow Channel Lines</span></label>
      <span class="lava-legend-FlowChannelLines current-lava-legend"></span>
      <span class="lava-last-updated" id="lavaFlowChannelLinesLastDateMobile"></span>
    </div>
    <div class="usa-checkbox current-lava-checkbox" id="checkFlowFrontPoints">
      <input class="usa-checkbox__input btn-current-lava" id="lavaFlowFrontPointsMobile" type="checkbox" name="" onchange="volHazardsUI.toggleCurrentLavaLayer('FlowFrontPoints')" value="" data-depth="FlowFrontPoints" checked="">
      <label class="usa-checkbox__label" for="lavaFlowFrontPointsMobile"><span class="name">Flow Front Points</span></label>
      <span class="lava-legend-FlowFrontPoints current-lava-legend"></span>
      <span class="lava-last-updated" id="lavaFlowFrontPointsLastDateMobile"></span>
    </div>
    <div class="usa-checkbox current-lava-checkbox" id="checkFlowPolys">
      <input class="usa-checkbox__input btn-current-lava" id="lavaFlowPolysMobile" type="checkbox" name="" onchange="volHazardsUI.toggleCurrentLavaLayer('FlowPolys')" value="" data-depth="FlowPolys" checked="">
      <label class="usa-checkbox__label" for="lavaFlowPolysMobile"><span class="name">Flow Polygons</span></label>
      <span class="lava-legend-FlowPolys current-lava-legend"></span>
      <span class="lava-last-updated" id="lavaFlowPolysLastDateMobile"></span>
    </div>
  </fieldset>
</form>

<form class="usa-form" id="lava-filters-mobile">
  <fieldset class="usa-fieldset lava-data">
    <div class="usa-checkbox" id="checkYearsAD1983to2018Mobile">
      <input class="usa-checkbox__input btn-lava" id="lavaAD1983to2018Mobile" type="checkbox" name="" onchange="volHazardsUI.toggleLavaLayer('AD1983to2018')" value="" data-depth="AD1983to2018" checked="">
      <label class="usa-checkbox__label" for="lavaAD1983to2018Mobile"><span class="lava-legend-AD1983to2018 lava-symbol"></span><span class="name">A.D. 1983 - 2018</span><span class="badge lava-badge" id="lava1983-2018BadgeMobile"></span> </label>
    </div>
    <div class="usa-checkbox" id="checkYearsAD1951to1982Mobile">
      <input class="usa-checkbox__input btn-lava" id="lavaAD1951to1982Mobile" type="checkbox" name="" onchange="volHazardsUI.toggleLavaLayer('AD1951to1982')" value="" data-depth="AD1951to1982" checked="">
      <label class="usa-checkbox__label" for="lavaAD1951to1982Mobile"><span class="lava-legend-AD1951to1982 lava-symbol"></span><span class="name">A.D. 1951 - 1982</span><span class="badge lava-badge" id="lava1951-1982BadgeMobile"></span> </label>
    </div>
    <div class="usa-checkbox" id="checkYearsAD1925to1950Mobile">
      <input class="usa-checkbox__input btn-lava" id="lavaAD1925to1950Mobile" type="checkbox" name="" onchange="volHazardsUI.toggleLavaLayer('AD1925to1950')" value="" data-depth="AD1925to1950" checked="">
      <label class="usa-checkbox__label" for="lavaAD1925to1950Mobile"><span class="lava-legend-AD1925to1950 lava-symbol"></span><span class="name">A.D. 1925 - 1950</span><span class="badge lava-badge" id="lava1925-1950BadgeMobile"></span> </label>
    </div>
    <div class="usa-checkbox" id="checkYearsAD1869to1924Mobile">
      <input class="usa-checkbox__input btn-lava" id="lavaAD1869to1924Mobile" type="checkbox" name="" onchange="volHazardsUI.toggleLavaLayer('AD1869to1924')" value="" data-depth="AD1869to1924" checked="">
      <label class="usa-checkbox__label" for="lavaAD1869to1924Mobile"><span class="lava-legend-AD1869to1924 lava-symbol"></span><span class="name">A.D. 1869 - 1924</span><span class="badge lava-badge" id="lava1869-1924BadgeMobile"></span> </label>
    </div>
    <div class="usa-checkbox" id="checkYearsAD1840to1868Mobile">
      <input class="usa-checkbox__input btn-lava" id="lavaAD1840to1868Mobile" type="checkbox" name="" onchange="volHazardsUI.toggleLavaLayer('AD1840to1868')" value="" data-depth="AD1840to1868" checked="">
      <label class="usa-checkbox__label" for="lavaAD1840to1868Mobile"><span class="lava-legend-AD1840to1868 lava-symbol"></span><span class="name">A.D. 1840 - 1868</span><span class="badge lava-badge" id="lava1840-1868BadgeMobile"></span></label>
    </div>
    <div class="usa-checkbox" id="checkYearsAD1778to1839Mobile">
      <input class="usa-checkbox__input btn-lava" id="lavaAD1778to1839Mobile" type="checkbox" name="" onchange="volHazardsUI.toggleLavaLayer('AD1778to1839')" value="" data-depth="AD1778to1839" checked="">
      <label class="usa-checkbox__label" for="lavaAD1778to1839Mobile"><span class="lava-legend-AD1778to1839 lava-symbol"></span><span class="name">A.D. 1778 - 1839</span><span class="badge lava-badge" id="lava1778-1839BadgeMobile"></span> </label>
    </div>
  </fieldset>
</form>

Text Content

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U.S. Geological Survey
 * Science
    * Science Explorer
   
    * Mission Areas
    * Programs
   
    * Regions
   
    * Science Centers
    * Observatories
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    * Frequently Asked Questions
    * Educational Resources
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    * USGS Celebrates the Year of Open Science

 * Products
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BREADCRUMB

 1. Volcano Hazards Program
 2. Observatories


CASCADES VOLCANO OBSERVATORY

FIND U.S. VOLCANO

Select a U.S. Volcano Adagdak Akutan Amak Amukta Aniakchak Atka Volcanic Complex
Augustine Behm Canal-Rudyerd Bay Black Peak Bobrof Bogoslof Buldir Buzzard Creek
Carlisle Chagulak Chiginagak Cleveland Dana Davidof Denison Douglas Duncan Canal
Dutton Edgecumbe Emmons Lake volcanic center Fisher Fourpeaked Frosty Gareloi
Great Sitkin Griggs Hayes Herbert Iliamna Imuruk Lake Ingakslugwat Hills
Isanotski Kagamil Kaguyak Kanaga Kasatochi Katmai Kialagvik Kiska Koniuji Kukak
Kupreanof Little Sitkin Mageik Makushin Martin Moffett Mount Churchill Mount
Recheshnoi Novarupta Okmok Pavlof Pavlof Sister Redoubt Roundtop Saint Paul
Island Seguam Segula Semisopochnoi Shishaldin Snowy Mountain Spurr St. Michael
Steller Stepovak Bay group Takawangha Tana Tanaga Tlevak Strait-Suemez Island
Trident Ugashik-Peulik Ukinrek Maars Uliaga Unnamed (near Ukinrek Maars)
Veniaminof Vsevidof Westdahl Wide Bay Wrangell Yantarni Yunaska Ofu-Olosega Ta'u
Island Tutuila Island San Francisco Volcanic Field Uinkaret Volcanic Field Clear
Lake Volcanic Field Coso Volcanic Field Lassen Volcanic Center Long Valley
Caldera Mammoth Mountain Medicine Lake Mono Lake Volcanic Field Mono-Inyo
Craters Mount Shasta Salton Buttes Ubehebe Craters Dotsero Volcanic Center
Agrigan Ahyi Seamount Alamagan Anatahan Asuncion Daikoku Seamount East Diamante
Esmeralda Bank Farallon de Pajaros Fukujin Seamount Guguan Kasuga 2 Maug Islands
Pagan Ruby Sarigan South Sarigan Seamount Supply Reef Zealandia Bank Haleakalā
Hualālai Kama‘ehuakanaloa Kīlauea Mauna Kea Mauna Loa Black Butte Crater Lava
Field Craters of the Moon Volcanic Field Hell's Half Acre Lava Field Wapi Lava
Field Soda Lakes Carrizozo Lava Flow Red Hill-Quemado Volcanic Field Valles
Caldera Zuni-Bandera Volcanic Field Belknap Blue Lake Crater Cinnamon Butte
Crater Lake Davis Lake Volcanic Field Devils Garden Lava Field Diamond Craters
Volcanic Field Jordan Craters Volcanic Field Mount Bachelor Mount Hood Mount
Jefferson Newberry Sand Mountain Volcanic Field Three Sisters Black Rock Desert
Volcanic Field Markagunt Plateau Volcanic Field Glacier Peak Indian Heaven
Volcanic Field Mount Adams Mount Baker Mount Rainier Mount St. Helens West
Crater Volcanic Field Yellowstone

MONITORING MAP


Belknap CraterBlack Butte Crater lava fieldBlue Lake CraterCinnamon ButteCrater
LakeCraters of the Moon volcanic fieldDavis Lake volcanic fieldDevils Garden
lava fieldDiamond Craters volcanic fieldGlacier PeakHells Half Acre lava
fieldIndian Heaven Volcanic FieldJordan Craters volcanic fieldMedicine Lake
volcanoMount AdamsMount BachelorMount BakerMount HoodMount JeffersonMount
RainierMount ShastaMount St. HelensNewberrySand Mountain volcanic fieldThree
SistersWapi Lava FieldWest Crater volcanic fieldYellowstone

Zoom to


+Zoom In
−Zoom Out



RESULTS



RESULTS
 * VOLCANOES
   TOTAL VOLCANOES : 28
   
    * BELKNAP CRATER
      
      UNASSIGNED - UNASSIGNED
      N/A
      
   
    * BLACK BUTTE CRATER LAVA FIELD
      
      UNASSIGNED - UNASSIGNED
      N/A
      
   
    * BLUE LAKE CRATER
      
      UNASSIGNED - UNASSIGNED
      N/A
      
   
    * CINNAMON BUTTE
      
      UNASSIGNED - UNASSIGNED
      N/A
      
   
    * CRATER LAKE
      
      GREEN - NORMAL
      N/A
      
   
    * CRATERS OF THE MOON VOLCANIC FIELD
      
      UNASSIGNED - UNASSIGNED
      N/A
      
   
    * DAVIS LAKE VOLCANIC FIELD
      
      UNASSIGNED - UNASSIGNED
      N/A
      
   
    * DEVILS GARDEN LAVA FIELD
      
      UNASSIGNED - UNASSIGNED
      N/A
      
   
    * DIAMOND CRATERS VOLCANIC FIELD
      
      UNASSIGNED - UNASSIGNED
      N/A
      
   
    * GLACIER PEAK
      
      GREEN - NORMAL
      N/A
      
   
    * HELLS HALF ACRE LAVA FIELD
      
      UNASSIGNED - UNASSIGNED
      N/A
      
   
    * INDIAN HEAVEN VOLCANIC FIELD
      
      UNASSIGNED - UNASSIGNED
      N/A
      
   
    * JORDAN CRATERS VOLCANIC FIELD
      
      UNASSIGNED - UNASSIGNED
      N/A
      
   
    * MEDICINE LAKE VOLCANO
      
      GREEN - NORMAL
      N/A
      
   
    * MOUNT ADAMS
      
      GREEN - NORMAL
      N/A
      
   
    * MOUNT BACHELOR
      
      UNASSIGNED - UNASSIGNED
      N/A
      
   
    * MOUNT BAKER
      
      GREEN - NORMAL
      N/A
      
   
    * MOUNT HOOD
      
      GREEN - NORMAL
      2021-06-06 04:38:06
      
   
    * MOUNT JEFFERSON
      
      GREEN - NORMAL
      N/A
      
   
    * MOUNT RAINIER
      
      GREEN - NORMAL
      N/A
      
   
    * MOUNT SHASTA
      
      GREEN - NORMAL
      N/A
      
   
    * MOUNT ST. HELENS
      
      GREEN - NORMAL
      2023-10-30 22:53:25
      
   
    * NEWBERRY
      
      GREEN - NORMAL
      2022-04-04 18:31:38
      
   
    * SAND MOUNTAIN VOLCANIC FIELD
      
      UNASSIGNED - UNASSIGNED
      N/A
      
   
    * THREE SISTERS
      
      GREEN - NORMAL
      2022-01-31 20:45:17
      
   
    * WAPI LAVA FIELD
      
      UNASSIGNED - UNASSIGNED
      N/A
      
   
    * WEST CRATER VOLCANIC FIELD
      
      UNASSIGNED - UNASSIGNED
      N/A
      
   
    * YELLOWSTONE
      
      GREEN - NORMAL
      2024-07-01 18:32:53
      

 * EARTHQUAKES
   EARTHQUAKES DATA
    * OFF  
    * ON   
   
    * TOTAL EARTHQUAKES: 0
   
   

 * INSTRUMENTS
   TOTAL INSTRUMENTS : 0
   
   


FILTERS



Filter Total Items:

REGION FILTER
 * VOLCANOES
   VOLCANOES
   NORMAL 13
   UNASSIGNED 15
 * EARTHQUAKES
   EARTHQUAKES DATA
    * OFF  
    * ON   
   
   
   EARTHQUAKE AGE
   LAST 2 HOURS0
   LAST 2 DAYS0
   LAST 2 WEEKS10
   LAST 4 WEEKS35
   CUSTOM DATE RANGE
   CUSTOM START DATE
   MM/DD/YYYY
   
   CUSTOM END DATE
   MM/DD/YYYY
   
   EARTHQUAKE MAGNITUDE
   < 1 M
   1 - 2 M
   2 - 3 M
   3 - 4M5
   4 - 5M25
   5 - 6 M4
   6+ M1
   EARTHQUAKE DEPTH (KM)
   < 5KM
   5 - 10KM1
   10 - 15KM33
   15 - 20KM
   20+KM1
 * INSTRUMENTS
   INSTRUMENTS
   
 * RECENT LAVA FLOWS
   RECENT LAVA FLOW DATA
    * OFF  
    * ON   
   
   
   ERUPTIVE VENT POINTS
   ERUPTIVE FISSURE LINES
   FLOW CHANNEL LINES
   FLOW FRONT POINTS
   FLOW POLYGONS
 * PAST LAVA FLOWS
   LAVA FLOW DATA
    * OFF  
    * ON   
   
   
   A.D. 1983 - 2018
   A.D. 1951 - 1982
   A.D. 1925 - 1950
   A.D. 1869 - 1924
   A.D. 1840 - 1868
   A.D. 1778 - 1839
 * REGIONS
   REGION SELECT SELECT REGION ID-WY ALASKA HAWAII MARIANA ISLANDS CA-NV WA-OR
   UT-CO-AZ-NM ALL


   LEARN MORE
   
   THE MAP DISPLAYS VOLCANOES, EARTHQUAKES, MONITORING INSTRUMENTS, AND PAST
   LAVA FLOWS.
   
   GET HELP


EARTHQUAKE PLOTS


To generate a cross-sectional plot, enter desired cross section width, then
define the cross-sectional area by clicking the map twice to define the two
endpoints. Then click the view plot button. Wait until map has completely
loaded/refreshed before clicking. And click slowly.


Select Plot Area
Cross Section Width:
Plot Input Km Plot Zoom In Plot Zoom Out

View Plot Hide Plot Area


FILTER INSTRUMENTS

Show All
Hide All



SETTINGS

MAPLAYER SELECT
MAP LAYERS
SELECT BASE MAP STREETS OCEANS OPENSTREETMAP WORLD IMAGERY WORLD IMAGERY WITH
LABELS NATIONAL GEOGRAPHIC TERRAIN WITH LABELS TOPOGRAPHIC GRAY DARK GRAY

Earthquake Colors
 * Time 
 * Depth



Earthquake Depth Units
 *  Km   
 *  Miles



Earthquake Time Units
 * UTC  
 * Local



Legend Display Settings
 * Off  
 * On   



Earthquakes Data
 * Off  
 * On   



Reset All Settings
 * Reset
 * 

RESULTS
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PLOTS

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 * FILTERS
   
   
      
    * VOLCANOES
      Volcanoes
      
      
      
    * EARTHQUAKES
      Earthquake Data
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      Earthquake Age
      Last 2 Hours0
      Last 2 Days0
      Last 2 Weeks10
      Last 4 Weeks35
      Custom Date Range
      Custom Start Date
      mm/dd/yyyy
      
      Custom End Date
      mm/dd/yyyy
      
      Earthquake Magnitude
      < 1 M
      1 - 2 M
      2 - 3 M
      3 - 4M5
      4 - 5M25
      5 - 6 M4
      6+ M1
      Earthquake Depth (km)
      < 5km
      5 - 10km1
      10 - 15km33
      15 - 20km
      20+km1
      
      
    * INSTRUMENTS
      Instruments
      
      
      
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      Recent Lava Flow Data
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      Eruptive Vent Points
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    * PAST LAVA FLOWS
      Lava Flow Data
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      A.D. 1983 - 2018
      A.D. 1951 - 1982
      A.D. 1925 - 1950
      A.D. 1869 - 1924
      A.D. 1840 - 1868
      A.D. 1778 - 1839
      
      
    * REGIONS
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      The map displays volcanoes, earthquakes, monitoring instruments, and past
      lava flows.
      
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 * EARTHQUAKE PLOTS
   
   


   EARTHQUAKE PLOTS
   
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   LABELS NATIONAL GEOGRAPHIC TERRAIN WITH LABELS TOPOGRAPHIC GRAY DARK GRAY
   
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 * RESULTS

 * VOLCANOES
   Total Volcanoes : 0
   
   

 * EARTHQUAKES
   Earthquakes Data
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    * Total Earthquakes : 0
   
   

 * INSTRUMENTS
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EARTHQUAKE PLOTS

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Future plot: Strain Release Over Time

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SETTINGS

COLOR EARTHQUAKES

depth time
Display earthquake colors according to their depth or age.


DEPTH UNITS

km mi
Display earthquake depths in kilometers or miles.


TIME UNITS

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Display earthquake times in UTC or my local time.


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selection.
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Display settings options. Provides options to:
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Cascades Volcano Observatory
 * Home
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The U.S. Geological Survey's Cascades Volcano Observatory strives to serve the
national interest by helping people to live knowledgeably and safely with
volcanoes in Washington, Oregon, and Idaho. 

YOUNG VOLCANOES IN WA, OR & ID

Very High Threat Potential 1

Crater Lake

Glacier Peak

Mount Baker

Mount Hood

Mount Rainier

Mount St. Helens

Newberry

Three Sisters

High Threat Potential 1

Mount Adams

Moderate Threat Potential 1

Mount Bachelor

Low to Very Low Threat Potential 1

Belknap

Black Butte Crater Lava Field

Blue Lake Crater

Cinnamon Butte

Craters of the Moon Volcanic Field

Davis Lake Volcanic Field

Devils Garden Lava Field

Diamond Craters Volcanic Field

Hell's Half Acre Lava Field

Indian Heaven Volcanic Field

Jordan Craters Volcanic Field

Mount Jefferson

Sand Mountain Volcanic Field

Wapi Lava Field

West Crater Volcanic Field



1. View the threat rankings of US Volcanoes.

CASCADES VOLCANO MONITORING



USGS Cascades Volcano scientists listen to and watch volcanoes using a variety
of equipment. Seismometers detect earthquakes, GPS receivers detect ground
motion, "sniffers" detect volcanic gas, and staff innovate new equipment to
solve unique activity detection needs.

Learn More
CASCADES VOLCANO HAZARDS



Volcanic activity in the Cascade Range can produce many types of volcano
hazards. Tall and snow-covered mountains can be hazardous even without a change
in volcanic activity.

Learn About Hazards
CVO QUICK LINKS

 * Subscribe to volcano updates
 * Teaching resources
 * Actions to take when a volcano erupts
 * Photos, videos, and webcams


NEWS

CVO dismantles Mount St. Helens’ VALT seismic station after 18 years in service.
July 16, 2024

CVO DISMANTLES MOUNT ST. HELENS’ VALT SEISMIC STATION AFTER 18 YEARS IN SERVICE.

Volcano Watch — Cruising Chain of Craters Road: Recent earthquakes and past
volcanism
July 3, 2024

VOLCANO WATCH — CRUISING CHAIN OF CRATERS ROAD: RECENT EARTHQUAKES AND PAST
VOLCANISM

Mount St. Helens seismicity elevated but within the range of background levels
(February to June 2024)
June 18, 2024

MOUNT ST. HELENS SEISMICITY ELEVATED BUT WITHIN THE RANGE OF BACKGROUND LEVELS
(FEBRUARY TO JUNE 2024)

View All


PUBLICATIONS

November 29, 2023

DYNAMICS OF MAGMA MIXING AND MAGMA MOBILIZATION BENEATH MAUNA LOA – INSIGHTS
FROM THE 1950 AD SOUTHWEST RIFT ZONE ERUPTION.

Eruptions from Mauna Loa’s Southwest Rift Zone (SWRZ) pose a significant threat
to nearby communities due to high eruption rates and steep slopes resulting in
little time for evacuation. Despite the large body of research done on Mauna
Loa, knowledge of the timing and duration of magma residence and transfer
through its internal plumbing system is still poorly constrained. This study
presents a fi
Authors
Maren Kahl, Daniel J. Morgan, Carl Thornber, Richard Walshaw, Kendra J. Lynn,
Frank A. Trusdell
By
Volcano Hazards Program, Volcano Science Center, Cascades Volcano Observatory
August 25, 2022

CAN LAVA FLOW LIKE WATER? ASSESSING APPLICATIONS OF CRITICAL FLOW THEORY TO
CHANNELIZED BASALTIC LAVA FLOWS

Flowing lava and water have dramatically different physical properties but can
form similar hydraulic structures, including undular hydraulic jumps, or
standing wave trains. In water flows, undular hydraulic jumps are evidence of
critical flow (Froude number ∼1) and open-channel hydraulic theory provides a
powerful tool for estimating flow depth and velocity. Monitoring these
parameters in an acti
Authors
Hannah R. Dietterich, Gordon E. Grant, Becky Fasth, J. J. Major, Katharine V.
Cashman
By
Volcano Hazards Program, Volcano Science Center, Cascades Volcano Observatory
May 15, 2020

MOUNT ST. HELENS AT 40

No abstract available. 
Authors
Jon J. Major
By
Volcano Hazards Program, Volcano Science Center, Cascades Volcano Observatory
View All


SCIENCE

link

December 7, 2023

COLUMBIA RIVER BASALT GROUP STRETCHES FROM OREGON TO IDAHO

The Columbia River Basalt Group (CRBG) is the youngest, smallest and one of the
best-preserved continental flood basalt province on Earth, covering over 210,000
km2 of mainly eastern Oregon and Washington, western Idaho, and part of northern
Nevada.
By
Cascades Volcano Observatory
link
December 7, 2023

COLUMBIA RIVER BASALT GROUP STRETCHES FROM OREGON TO IDAHO

The Columbia River Basalt Group (CRBG) is the youngest, smallest and one of the
best-preserved continental flood basalt province on Earth, covering over 210,000
km2 of mainly eastern Oregon and Washington, western Idaho, and part of northern
Nevada.
Learn More
link

December 7, 2023

THE BORING VOLCANIC FIELD — HILLS OF THE PORTLAND BASIN

Non-enthusiasts may consider the Boring Volcanic Field aptly named, but the
title comes from its location, not from a lack of interesting characteristics.
By
Cascades Volcano Observatory
link
December 7, 2023

THE BORING VOLCANIC FIELD — HILLS OF THE PORTLAND BASIN

Non-enthusiasts may consider the Boring Volcanic Field aptly named, but the
title comes from its location, not from a lack of interesting characteristics.
Learn More
link

December 7, 2023

MONITORING CASCADE VOLCANOES

Active volcanoes are complex natural systems, and understanding a volcano's
behaviors requires the attention of specialists from many science disciplines.
It demands a combination of current knowledge about magma systems, tectonic
plate motion, volcano deformation, earthquakes, gases, chemistry, volcano
histories, processes, and hazards.
By
Cascades Volcano Observatory
link
December 7, 2023

MONITORING CASCADE VOLCANOES

Active volcanoes are complex natural systems, and understanding a volcano's
behaviors requires the attention of specialists from many science disciplines.
It demands a combination of current knowledge about magma systems, tectonic
plate motion, volcano deformation, earthquakes, gases, chemistry, volcano
histories, processes, and hazards.
Learn More
View All
YOUNG VOLCANOES IN WA, OR & ID

Very High Threat Potential 1

Crater Lake

Glacier Peak

Mount Baker

Mount Hood

Mount Rainier

Mount St. Helens

Newberry

Three Sisters

High Threat Potential 1

Mount Adams

Moderate Threat Potential 1

Mount Bachelor

Low to Very Low Threat Potential 1

Belknap

Black Butte Crater Lava Field

Blue Lake Crater

Cinnamon Butte

Craters of the Moon Volcanic Field

Davis Lake Volcanic Field

Devils Garden Lava Field

Diamond Craters Volcanic Field

Hell's Half Acre Lava Field

Indian Heaven Volcanic Field

Jordan Craters Volcanic Field

Mount Jefferson

Sand Mountain Volcanic Field

Wapi Lava Field

West Crater Volcanic Field



1. View the threat rankings of US Volcanoes.

VOLCANOES HAZARDS PROGRAM LINKS

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