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 1. Home
 2. News


THE SCIENCE BEHIND HAWAII'S SURPRISING 2018 VOLCANIC ERUPTION

By Laura Geggel June 04, 2018



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 * 
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 * 
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 * 
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Fountaining at fissure 22 has reached as high as 160 feet (50 meters). This
photo was taken May 22. (Image credit: U.S Geological Survey)


Kilauea volcano is spewing lava and belching hazardous gases on Hawaii's Big
Island, forcing more than 1,700 people to evacuate their homes.



Eruptions aren't anything new on Kilauea. In particular, the Pu'u 'Ō'ō vent,
where lava is visible, has erupted almost continuously since January 1983. But
the latest eruption took volcanologists by surprise when it invaded Leilani
Estates, a residential area near Kilauea.



Signs of trouble began in mid-March, when increased magma in the system prompted
the Pu'u 'Ō'ō vent to inflate in size, like when a chef pumps cream into a cream
puff, Janet Babb, a geologist and Hawaiian Volcano Observatory spokesperson,
previously told Live Science. This surge of magma ultimately caused Pu'u 'Ō'ō's
crater floor to collapse on April 30. After this, the excess magma traveled
southeast toward the residential Puna District, Babb said. [Photos: Fiery Lava
from Kilauea Volcano Erupts on Hawaii's Big Island]



Small earthquakes had shaken the region all that week, but residents were taken
aback by 5.0- and 6.9-magnitude earthquakes on May 3 and 4, respectively, which
preceded lava eruptions. Now, newly opened fissures are bubbling with lava
almost daily, and Hawaii County Civil Defense has warned sightseers to stay away
for safety's sake.


RESOURCES FOR RESIDENTS

 * The @HawaiiRedCross Twitter page has information on evacuees and available
   shelters.
 * For a list of shelters, evacuation orders, road closings and other
   information related to the eruption, check out Hawaii News Now.
 * See Hawaii Civil Defense Messages and Alerts via text and email.
 * The Hawaiian Volcano Observatory has up-to-date photos, alert levels, maps,
   webcams and other information about the current eruption.


JUNE 4



The lava flow from Fissure 8 has entered Kapoho Bay, as this photo taken this
morning (June 4) shows. (Image credit: U.S. Geological Survey)

Lava continues to flow unabated from Fissure 8, feeding a robust lava channel,
according to the Hawaiian Volcano Observatory (HVO). Local videographers saw the
lava entering the ocean at Kapho Bay at about 10:30 pm local time yesterday
(June 3). By this morning (June 4), the flowing lava had created a delta a few
hundred yards into the bay. A volcanic haze — known as laze — arose where the
hot lava met the water, but it dissipated quickly as wind blew it inland, the
HVO said.



Fissure 8 is also releasing stands of glass known as Pele's hair as its lava
continues to fountain within the Leilani Estates. This fissure also had a
volcanic tornado last week, according to The Washington Post.

Meanwhile, all of the other fissures are inactive, except for Fissure 18 which
has sluggish lava flows.

At the summit, a small explosion went off yesterday afternoon (June 3). The rim
and walls of the lava lake Halema'uma'u are slumping inward. There have been
fewer earthquakes as of late, but geologists expect that the earthquakes'
frequency will soon increase in the coming days, which will likely lead to
another small explosion.




JUNE 1



These radar amplitude images that were acquired by the Italian Space Agency's
Cosmo-SkyMed satellite system. The images illustrate changes to the caldera area
of Kilauea Volcano that occurred between May 23 and May 31. (Image credit: U.S.
Geological Survey)

Fissure 8 is putting on a red-hot show on the Big Island. Last night, lava
fountained out of the fissure into a lava channel flowing northeast along
Highway 132. Parts of this channel overflowed as it traveled about 100 yards an
hour, according to the Hawaiian Volcano Observatory.

Even more stunning was the Pele's hair and other lightweight volcanic glass
emanating from Fissure 8. These were carried downwind and accumulated on the
ground within Leilani Estates.

In better news, Fissure 18 is slowing to a fizzle and Fissure 22 is now
inactive.

Meanwhile, the summit is usually a hotbed of ash plumes, but these have
diminished over the past day, possibly because rubble is piling on top of the
base of the ever-growing summit eruptive vent, the HVO said. There is still some
plume activity, however. This morning, the Summit's plume was whitish, meaning
it was mostly steam mixed with ash.

Small earthquakes continue to shake the area.


MAY 29



An ash explosion at the summit from May 27. (Image credit: U.S. Geological
Survey)

"Vigorous" lava eruptions continue to inundate the residential areas of Leilani
Estates and Lanipuna Gardens, the Hawaiian Volcano Observatory (HVO) said.

Fissure 8 reactivated yesterday (May 28) and fountained lava to heights of 200
feet (61 meters) last night. Fissure 8 even released "Pele's hair" — delicate
threads of volcanic glass — into the air, which were blown downwind and fell
west of the fissure.

Meanwhile, fissures 18, 19 and 20 had weak lava activity, with Fissure 18
churning out lava that advanced about 1.2 miles (1.9 kilometers) toward the
coast. These active fissures continue to release hazardous volcanic gas
emissions. Because of trade winds, the emissions may soon reach the southern and
western sides of the Big Island, the HVO said.

At the summit, the vent within the Halema'uma'u lava lake spewed out ash that
reached 15,000 feet (4,500 m) above sea level early this morning local time.


MAY 25



The Hilo Civil Air Patrol took this photo on May 23 along the Big Island's
coastline, where lava is flowing into the ocean. There are now three ocean entry
points. Photo courtesy of J. Ozbolt/Hilo Civil Air Patrol. (Image credit: U.S.
Geological Survey)

An ashy explosion jetted out of Overlook Crater late last night (May 24)
Hawaiian time, and reached about 10,000 feet (3,000 meters) above sea level,
according to the U.S. Geological Survey (USGS). Small explosions at the summit
continued today — "a consequence of magma withdrawing from a shallow reservoir
beneath the east margin of [the lava lake at the summit] Halema'uma'u," the USGS
said.

Meanwhile, fissure 22 is belching out more lava, and there is low-level spatter
(airborne lava clumps) at fissures 15 and 16. Fissure 13 has a little lava
fountain in its lava pond, the USGS added.

There is also action at the shore, where three lava channels are now flowing.
When lava hits the ocean, it creates a mixture of condensed acidic steam,
hydrochloric acid gas and tiny shards of volcanic glass, the USGS said. When
these components are blown by the wind, they form a downwind flowing haze, which
is known as laze (short for lava haze). This laze irritates the lungs, eyes and
skin, USGS said.


MAY 24



A lava flow emerges from fissure 22 on May 23. Notice how the lava is flowing
downhill, from right to left in the photo. (Image credit: U.S. Geological
Survey)

Several lava fissures reactivated last night within the Leilani Estates and
Lanipuna Gardens residential areas. These include fissures 2, 3, 7, 8, 14 and
21, which are spattering lava, meaning they're throwing chunks of molten rock
into the air, according to the Hawaiian Volcano Observatory (HVO).

There are other hazards, too: The fissure eruptions are releasing hazardous
volcanic gases, and the ground is still shaking with small earthquakes.

At Kilauea's summit, small ash emissions continue to hiccup out of Overlook
Crater. In fact, ash plumes reached 6,000 feet (1,800 meters) during several
energetic explosions, but this ash dispersed quickly, the HVO said.

Meanwhile, the HVO just reported that Leilani Estates saw eerie blue flames
Tuesday night (May 22) as lava burned plants and shrubs, which, in turn,
released methane, a blue-burning gas. [Read more: Why Eerie Blue Flames Just
Erupted from Hawaiian Volcano]


MAY 23



Fountaining at fissure 22 has reached as high as 160 feet (50 meters). This
photo was taken May 22. (Image credit: U.S Geological Survey)

Leilani Estates and Lanipuna Gardens are still home to intrusive guests:
erupting lava and cracking ground. Just like yesterday, the middle part of the
fissure system is sizzling, with fissures 5, 6, 19, 22 and 23 showing the most
activity, the Hawaiian Volcano Observatory (HVO) said. Fissure 9 has a faint
glow but isn't producing any lava flows.

Overnight, methane burned in the area's road cracks, the HVO noted.

Lava is likely still pouring into the ocean, where it is producing small
explosions, the HVO said. The lava channel there is now quite high — about 36
feet (11 meters) aboveground. Meanwhile, volcanic gas emissions are still
elevated from the fissure eruptions, and small earthquakes are still rocking the
area from the active magma underground.

At Kilauea's summit, Overlook Crater is releasing small gas plumes. Winds are
blowing these plumes to the southwest, meaning ash may fall in that area, the
HVO said.


MAY 22



An aerial view of a lava breakout on May 22. (Image credit: U.S Geological
Survey)

The Leilani Estates residential area can't catch a break: Erupting lava and
ground cracking continue to besiege the subdivision.

The most active fissures are in the middle of the fissure system, including
fissures 5, 6, 19, 22 and 23, although fissure 17, in the northeastern part of
the fissure system, is still weakly active, according to the Hawaiian Volcano
Observatory (HVO). Fissures 6 and 22 are feeding lava flows, and fissures 5 and
23 have fountaining lava in the eastern part of Leilani Estates, the HVO said.
Moreover, the flow of magma underground continues to cause small earthquakes in
the region.

At the summit, Overlook Crater is burping out small ash clouds.


MAY 21



A bird's-eye view of lava erupting out of fissure 22 on May 21. Photo courtesy
of Volcano Helicopters. (Image credit: U.S Geological Survey)

A small explosion tore through Halema'uma'u, the lava lake at Kilauea's summit,
early this morning, at 12:55 a.m. Hawaii Standard Time. The blast produced an
ash plume reaching about 7,000 feet (2,133 meters) above sea level, according to
the Hawaiian Volcano Observatory. This plume is big but not as large as the
30,000-foot-high (9,100 m) plume that the volcano belched out last week
following an even larger explosion at the summit.


MAY 18



A geologist with the Hawaiian Volcano Observatory stands next to cracks on Nohea
Street in Leilani Estates yesterday (May 17). (Image credit: U.S Geological
Survey)

The lava isn't taking a break. A "moderate level" of lava continues to erupt
from the active fissure system in the residential Puna District, which sits next
to Kilauea volcano, according to the Hawaiian Volcano Observatory (HVO).

There is spattering (airborne chunks of lava) from fissures 15, 17, 18, 20, 21
and 22, as well as pahoehoe lava — smooth undulating or ropy masses of lava —
flowing from fissures 17, 18 and 20, the HVO said.

Volcanic gas levels are still high, and weak winds today mean that other areas
on the Big Island might be affected. Click here for forecast information.
Moreover, lava moving underground (where it's called magma) continues to cause
small earthquakes in the area.

The summit is somewhat calmer than yesterday, when an explosion sent ash 5.6
miles (9 kilometers) into the sky. But there is some activity: A "robust plume
of gas and steam is billowing out of the Overlook vent and drifting generally
southwest," the HVO reported.


MAY 17



Webcams that operate 24/7 faithfully recorded the ashy cloud that reached as
high as some commercial airplanes fly. (Image credit: U.S Geological Survey)

The summit at Kilauea exploded today as boulders and a volcanic cloud, more than
5 miles (8 kilometers) high, spewed out of the Overlook vent at the top of the
volcano.

The explosion happened shortly after 4 a.m. Hawaii Standard Time, and sent a
plume about 30,000 feet (9,100 meters) into the sky, an altitude where
commercial airplanes fly, according to the Hawaiian Volcano Observatory.

There are no reports of injuries, but the National Weather Service issued an
ashfall advisory. Also, due to high levels of sulfur dioxide, several local
schools are closed. [Read more: Kilauea Spews Boulders in 5-Mile-High Eruption]


MAY 16



Civil Air Patrol flight CAP20 reported plumes as tall as 9,500 feet (2,900
meters), with the dispersed plume rising as high as 11,000 feet (3,300 m) on May
15. Ash from this plume fell on communities downwind of Kilauea. (Image credit:
U.S Geological Survey)

Lava flows escaping from Fissure 17 are slowing down, only advancing about 100
yards (91 meters) in the past 24 hours, according to the Hawaiian Volcano
Observatory (HVO). Meanwhile, high levels of volcanic gas are being emitted
downwind of the volcanic vents, and trade winds hitting Hawaii today may bring
these hazardous gases to other parts of the island, the HVO said.

At the summit of Kilauea, enormous ash plumes — some reaching as high as 10,000
feet (3,000 m) above sea level — astonished onlookers yesterday (May 15). These
plumes came from the Overlook vent, where the lava lake Halema'uma'u sits. It's
likely that rockfall into the lava lake led to these plumes, the HVO said. The
ash from these clouds dusted communities from Pahala to Discovery Harbor with
ash and made it hazardous to operate aircraft in the area.

The surprises didn't end there. Two-foot-wide (60 centimeters) ballistic blocks
were found in the parking lot, just a few hundred yards from Halema'uma'u.

"These reflect the most energetic explosions yet observed and could reflect the
onset of steam-driven explosive activity," the HVO said. "Additional such
explosions are expected and could be more powerful."


MAY 15



Steam jets out of fissure 17 on May 14. (Image credit: U.S Geological Survey)

Lava continues to pour from several active fissures. Lava flows crept forward at
about 20 yards per hour (0.01 kilometer per hour) from fissure 17 last night,
according to the Hawaiian Volcano Observatory.

Meanwhile, a new fissure opened this morning in the Lanipuna Gardens
subdivision, northeast of fissure 19. And volcanic gas emissions are still high,
especially in areas downwind of the volcanic vents. Little earthquakes, many of
them magnitude 2 to 4, continue to shake the region as magma roils underground.

At Kilauea's summit, a plume from the Overlook vent — where the lava lake
Halema'uma'u is housed — is "steady and gray" because of volcanic ash, the
Hawaiian Volcano Observatory said. This plume is enormous — it's rising several
thousand feet above ground and drifting southeast. Ashfall is already falling
down to earth in the upper Ka'u Desert and downwind of the summit.


MAY 14



At 8 a.m. Hawaii Standard Time (HST) on May 13, a slow and sticky flow emerges
from a new fissure — No. 17 — northeast at the end of Hinalo Street. (Image
credit: U.S. Geological Survey)

There was a stupendous lava show this morning from fissure 17 (the cracks that
have opened up during this eruption are numbered, starting with No. 1), with
lava fountaining and explosions of spatter that are being hurled more than 100
feet (30 meters) into the air. Fissure 17 also had lava flowing from it.
Meanwhile, Fissure 18, which opened yesterday, is only weakly active now, and
fissure 19 is emitting a sluggish lava flow, according to the Hawaiian Volcano
Observatory. 


MAY 10

Although Pu'u 'Ō'ō is getting much of the public's attention, geologists have
also been monitoring the lava lake at Kilauea's summit. This lava lake — called
Halema'uma'u — is dropping dramatically, and if it goes below the water table,
there could be a steamy and rocky explosion, geologists said. [Read more:
Kilauea Volcano Could Launch 10-Ton Ballistic Boulders in a Dramatic Explosion]


MAY 7




MAY 4

A magnitude-5.0 earthquake that struck the Big Island on May 3 was followed by
lava eruptions that sounded as loud as a jet engine. This prompted mandatory
evacuations of the Leilani Estates and Lanipuna Gardens subdivisions. [Read
more: Hawaii's Kilauea Volcano Erupts Dramatically After a 5.0-Magnitude Quake]


MAY 3

More than 600 earthquakes have rattled Hawaii's Big Island over the past four
days as magma from Kilauea volcano moves toward the residential area of Leilani
Estates. [Read more: Do Hundreds of Earthquakes in Hawaii Mean Kilauea Could
Blow?]

Original article on Live Science.

Laura Geggel
 * 

Associate Editor
As an associate editor for Live Science, Laura Geggel covers general science,
including the environment, archaeology and amazing animals. She has written for
The New York Times, Scholastic, Popular Science and Spectrum, a site covering
autism research. Laura grew up in Seattle and studied English literature and
psychology at Washington University in St. Louis before completing her graduate
degree in science writing at NYU. When not writing, you'll find Laura playing
Ultimate Frisbee. 
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