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Photos 7, page 26
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3/5 Eruption
March 7-9, 2011
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More stuff from the HVO update page...
8 March 2011

Lava fountains from the northeastern vent of the Kamoamoa eruption
Lava fountains from the northeastern
vent of the
Kamoamoa eruption.
Though it is an impressive sight, the
Pu`u
`Ō `ō
cone in the background, and
several hundred meters higher, puts the
current activity into perspective.
View looking down onto the
northeastern vent.
Lava, erupting from the southwestern
vent of the
Kamoamoa eruption,
fountains above the surrounding forest.
Overview of the Kamoamoa eruption
looking northeast toward Pu`u `Ō `ō, in
is in the foreground, while the
northeastern vent is the distant fume at
the base of Pu`u `Ō `ō.
Overview of the Kamoamoa eruption
looking south. The northeastern vent is
to the left, and the southwestern vent is
to the upper right. A river of lava,
erupting from the southwestern vent, can
be seen advancing toward the southeast
National Park.
Thermal view into the Halema`uma`u vent that been largely obscured by fume
Views into the Halema`uma`u vent have been largely obscured by fume over the past several
days, and the only consistent views have been with a thermal camera, which can "see" through the
bottom of the extremely deep and narrow vent cavity. Prior to the drop in lava level, the lava lake
was near its high lava mark, shown by the hot ring on the upper vent cavity walls. The lava level
dropped considerably over the past several days, retreating to a narrow opening deep within the
vent cavity.
HAWAIIAN VOLCANO OBSERVATORY DAILY UPDATE

Activity Summary for past 24 hours: There have been significant changes as Kilauea volcano continued to erupt at two locations:
On the east rift zone, a fissure eruption that started March 5 continued intermittently at locations approximately 2-3.5 km WSW
of Pu`u `O`o. At the summit, the lava lake level remained deep below the rim of the vent inset within the east wall of elevated.

Past 24 hours at Kilauea summit: The lava level remained very deep (estimated more than 200 m or 655 ft) and mostly out of
webcam view within the vent inset within the east wall of Halema`uma`u Crater. There were at least three rim collapses, each
enlarging the vent and producing dense, dark plumes of rock dust. The summit tiltmeter network recorded slowing deflation.
Seismic tremor levels remained significantly elevated.

Three earthquakes were strong enough to be located within Kilauea volcano all beneath Halema`uma`u Crater.

The summit gas plume is robust and moving to the southwest this morning. The most recent (preliminary) sulfur dioxide emission
rate measurement was 1,100 tonnes/day on March 7, 2011.

Past 24 hours at the middle east rift zone vents: The fissure eruption that started March 5 continued through this morning with
vigorous spattering from at least two locations along the fissure which is located between the west flank of Pu`u `O`o and the
east rim of Napau Crater within Hawai`i Volcanoes National Park. Low fountains and spattering fed several temporary lava
flows advancing to the south within the park.

The most recent (preliminary) sulfur dioxide emission rate measurement was 10,000 tonnes/day on March 7, 2011 from all east
rift zone sources.

Preliminary satellite radar interferometry as of March 7 showed patterns suggesting that the new fissure eruption is the surface
expression of a dike possibly larger than the one that fed the January 1997 eruption and the June 2007 intrusion/eruption. The
tiltmeter on the north flank of Pu`u `O`o recorded slowing deflation. Seismic tremor levels remain significantly elevated and
variable in this part of the rift zone.

There was no active lava on the TEB or Nov. 29 flow fields nor within Pu`u `O`o Crater.
Tuesday, March 8, 2011 6:56 PM HST (Wednesday, March 9, 2011 04:56 UTC)

The eruption on Kilauea volcano's east rift zone continued throughout the day on the eastern and western ends of the 2.3 km long
fissure located between Pu'u 'O'o and Napau Crater, but late this afternoon, the eastern part of the fissure shut down.

The effusion rate remains high, with lava spatter reaching as high as 75 m. Lava erupted from the fissure is typically forming short,
thick flows, but a channelized flow from the western end of the fissure reached about 800 m in length by late afternoon.

East rift zone gas emissions are significantly elevated above the 300 tonnes/day measured during the past several months and the
long-term average of 1,700 tonnes/day. Gas measurements on March 7-8 show an SO2 emission rate of at least 10,000
tonnes/day, the highest measured on the east rift zone since an eruptive surge in July 2008 produced an emission rate of 7,000
tonnes/day.

Pu'u 'O'o and the TEB vent downrift of Pu'u 'O'o remain inactive today.

Summit SO2 emissions today were around 500-600 tonnes/day.

Seismicity continues at significantly elevated levels at both Kilauea's summit and east rift zone.

Deflation has slowed at the summit and east rift zone.

At Kilauea's summit, the lava lake within the Halema'uma'u Crater vent is estimated to be about 220 m below the crater floor
based on visual observations this morning.
A broad view of the Kamoamoa fissures between Nāpau Crater and Pu`u `Ō `ō
A broad view of the Kamoamoa
fissures. The fissures extend 2.3 km (1.4
mi) between Nāpau Crater and Pu`u `Ō
`ō. The western most fissure is just out
of view in this photo.
On the west end of the fissure system,
spatter ramparts are forming as the lava
fallout solidifies in a mound upwind from
the source.
A view of the spattering source from the
ground.
Lava was reaching heights above the
tree line.
Lava from the erupting fissure produced
a large flow that is moving southeast
through the adjacent forest.
A close-up of the flow front in the forest.
A collapse from the upper portion of the Halema`uma`u vent cavity produced a robust brown plume
With lava retreating deeper into the Halema`uma`u vent cavity over the past two days, the cavity
walls have experienced more frequent collapses. At 2:23pm today, a collapse from the upper
portion of the vent cavity produced a robust brown plume, but did not eject any large particles.
7 March 2011
HAWAIIAN VOLCANO OBSERVATORY DAILY UPDATE
Wednesday, March 9, 2011 9:12 AM HST (Wednesday, March 9, 2011 19:12 UTC)

Activity Summary for past 24 hours: Kilauea Volcano is erupting at two locations: On the east rift zone, the Kamoamoa fissure
eruption that started March 5 continued approximately 3.5 km WSW of Pu`u `O`o. At the summit, the lava lake level remained
deep below the rim of the vent inset within the east wall of Halema`uma`u Crater. East rift zone seismicity has decreased but
remained elevated; summit seismicity and sulfur dioxide emissions remained elevated.

Past 24 hours at Kilauea summit: The lava level remained very deep (estimated more than 200 m or 655 ft) and mostly out of
webcam view within the vent inset within the east wall of Halema`uma`u Crater but the presence of the lake was confirmed on
this morning's overflight. The summit tiltmeter network recorded slowing deflation. Seismic tremor levels remained significantly
elevated.

One earthquake was strong enough to be located within Kilauea volcano on south flank faults.

The summit gas plume is robust and moving to the southwest this morning. The most recent (preliminary) sulfur dioxide emission
rate measurement was 800 tonnes/day on March 8, 2011.

Past 24 hours at the middle east rift zone vents: The fissure eruption that started March 5 continued through this morning with
vigorous spattering from one location at the west end of the fissure near the east rim of Napau Crater within Hawai`i Volcanoes
National Park. Low fountains and spattering fed a channelized `a`a lava flow that advanced at least 2.8 km (1.8 mi) to the
southeast within the park.

The most recent (preliminary) sulfur dioxide emission rate measurement was 9,000 tonnes/day on March 8, 2011 from all east
rift zone sources.

The tiltmeter on the north flank of Pu`u `O`o recorded slowing deflation. Seismic tremor levels have decreased significantly
around Pu`u `O`o Crater but remained at elevated levels.
9 March 2011

Thermal images showing active fountains and channelized 'a'ā flow
This thermal image was taken from a helicopter above the active fountains at the west end of the
fissure system. There were two adjacent fountaining areas, with one situated within a spatter cone
and the other bursting through a perched lava pond. The fountains were feeding a channelized flow
that can be seen in the upper right portion of the image.
This thermal image shows the channelized 'a'ā flow that was being fed by the fountains at the west end of