Tag Archive | "usgs"

A small collapse of the Pu‘u ‘Ō‘ō crater at 6:14 a.m. HST today (May 1, 2019) was the last 'hurrah' for a GPS instrument located on the crater's edge (red circle). This station, designated PUOC, served faithfully throughout Kīlauea's 2018 eruption and was an important source of information on the shallow magma system of Pu‘u ‘Ō‘ō. The station's last reported position showed it moving rapidly to the southeast, consistent with motion into the crater (inset shows data transmissions from April 11 through this morning). Monitoring of Pu‘u ‘Ō‘ō is currently being accomplished by additional GPS and tilt stations farther from the edge of the crater. The larger equipment installation near the solar panels was not affected by this morning's collapse and continues to function. However, contingency plans are in place in case collapses of the crater edge continue. USGS photo by I. Johanson on March 18, 2019, annotated on May 1, 2019.

Volcano Watch: Kilauea activity update for May 2, 2019

Ká¿‘lauea Volcano is not erupting and its USGS Volcano Alert level remains at NORMAL.

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Volcano Watch: Kilauea activity update for April 25, 2019

Ká¿‘lauea Volcano is not erupting and its USGS Volcano Alert level remains at NORMAL.

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During the first two weeks of Kīlauea Volcano’s 2018 lower East Rift Zone eruption, fissures were characterized by low eruption rates and small flows. This was because the erupted lava originated from pockets of cooler, less fluid magma stored in the rift zone. Later fissures erupted hotter, more fluid magma, resulting in higher eruption rates and large, fast-moving lava flows, like that erupted from the fissure 8 cone (lower right), shown here on July 29, 2018. USGS photo by M. Patrick.

Volcano Watch: What we’ve learned from Kīlauea’s 2018 lower East Rift Zone eruption

May 3, 2019, marks the one-year anniversary of the start of Kīlauea Volcano’s 2018 lower East Rift Zone eruption.

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This image is from a temporary monitoring camera on the west rim of Kilauea Caldera. The camera is looking E towards the bottom of the newly enlarged Halemaʻumaʻu crater, although the deepest part of the crater is not visible from this vantage point. The crater from left to right (roughly NNE to SSW) is approximately 1 km (0.6 mi) across. The depth of the crater in the visible image from the rim is several hundred meters.

Volcano Watch: Kilauea activity update for April 18, 2019

Ká¿‘lauea Volcano is not erupting and its USGS Volcano Alert level remains at NORMAL.

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Location of the 5.3 magnitude earthquake at 5:09 p.m. HST, Saturday, April 13, 2019.

Hawaiian Volcano Observatory records 5.3M quake and aftershocks in Kona Saturday (April 13)

Three aftershocks were recorded within an hour of the earthquake, including a magnitude-3.0 event approximately 11 minutes following the mainshock. Additional aftershocks are expected.

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Only small amounts of sulfur dioxide (SO2) and hydrogen sulfide (H2S) are currently being released from Kῑlauea, but they chemically react with each other (oxidation-reduction reaction) to form the bright yellow sulfur deposits visible on the crater walls within Halemaʻumaʻu. The current low sulfur emission rates at Kīlauea have contributed to beautifully clear skies in downwind areas. USGS photo by M. Poland, 03/22/2019.

Volcano Watch: Eruption pause provides an opportunity to probe volcanic pollution

The end of Kīlauea’s 2018 eruption was accompanied by an enormous decrease in the amount of sulfur dioxide gas (SO2) emitted from the volcano. This has led to beautifully clear skies.

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A closer view of a gravity reading at a station located in the south part of KÄ«lauea caldera. When repeated over time, gravity measurements can detect changes in subsurface mass that might not be detectable by other monitoring methods. Scientists track this data because the changes could be related to magma movement within the volcano. USGS photo by M. Poland, 03/20/2019.

Volcano Watch: Kilauea activity update for April 4, 2019

Rates of seismicity, deformation, and gas release have not changed significantly over the past week.

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The causes of Rapid Ohia Death. USGS image

Keeping hooved animals out of Ohia forests reduces the spread of Rapid Ohia Death

Rapid ʻŌhiʻa Death, or ROD for short, enters trees through wounds to its bark.

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Senator Mazie K. Hirono questions Interior Secretary Nominee David Bernhardt about the future home of Hawaiian Volcano Observatory.

Senator Hirono questions decision to relocate Hawaiian Volcano Observatory to Oahu

Moving Hawaiian Volcano Observatory to Oahu “Doesn’t Seem to Make a Lot of Sense”

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This image is from a temporary monitoring camera on the west rim of Kilauea Caldera. The camera is looking East towards the bottom of the newly enlarged Halemaʻumaʻu crater, although the deepest part of the crater is not visible from this vantage point. The crater from left to right (roughly NNE to SSW) is approximately 1 km (0.6 mi) across. The depth of the crater in the visible image from the rim is several hundred meters. Image courtesy of USGS/HVO Webcam

Volcano Watch: Kilauea activity update for March 28, 2019

KÄ«lauea is not erupting. Rates of seismicity, deformation, and gas release have not changed significantly over the past week.

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Explosive eruption columns of ash rising from Halema‘uma‘u at 11:15 a.m. on May 18, 1924 (left) and at 11:05 a.m. on May 15, 2018 (right) look similar. Researchers are re-evaluating early assumptions about the role groundwater played in triggering these explosive eruptions at the summit of Kīlauea Volcano and are now looking at the build-up of gases from retreating magma as a likely trigger. USGS photos.

Volcano Watch: Did groundwater trigger explosive eruptions at KÄ«lauea?

An explosive eruption at Halema‘uma‘u in 1924 looks similar to the column of ash rising from Halema‘uma‘u in 2018.

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After magma drained from Pu‘u ‘Ō‘ō on April 30, 2018, the crater was roughly 356 m (1168 ft) deep, with the upper part of the crater flared and the deeper part a narrower cylindrical shaft. Collapses on the crater walls have since enlarged sections of the crater and filled the deepest part with rockfall debris, creating a much different crater geometry—as shown in this comparison of models from May 11, 2018, and March 18, 2019. Today, the deepest portion of the crater is 286 m (938 ft).

Volcano Watch: Kilauea activity update for March 22, 2019

KÄ«lauea is not erupting. Rates of seismicity, deformation, and gas release have not changed significantly over the past week.

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Volcano Watch: Kilauea activity update for March 15, 2019

KÄ«lauea is not erupting. Rates of seismicity, deformation, and gas release have not changed significantly over the past week.

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The seismic waveform of the March 13, 2019 earthquake measured at the Volcano Golf Course by the USGS.

USGS: Magnitude-5.5 earthquake on Kīlauea Volcano’s south flank, March 13, 2019

The U.S. Geological Survey’s Hawaiian Volcano Observatory (HVO) recorded a magnitude-5.5 earthquake located beneath KÄ«lauea Volcano’s south flank on Wednesday, March 13, at 12:55 a.m., HST.

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