Tag Archive | "puu oo"

Scientists use a laser diffraction particle size analyzer to examine fine ash from the 2018 Kīlauea summit explosions. The research examines fine ash (grains 1 mm to 1 micrometer) and investigates the processes of eruption, fragmentation, and respiratory health hazards (PM10, PM2.5). USGS image by A. Van Eaton

Volcano Watch: Kilauea activity update for May 9, 2019

Scientists use a laser diffraction particle size analyzer to examine fine ash from the 2018 Kīlauea summit explosions.

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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

Kῑlauea 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

Kῑlauea Volcano is not erupting and its USGS Volcano Alert level remains at NORMAL.

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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

Kῑlauea Volcano is not erupting and its USGS Volcano Alert level remains at NORMAL.

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A closer view of a gravity reading at a station located in the south part of Kīlauea 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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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

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

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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

Kīlauea 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

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

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Epicenter of a 5.0 magnitude earthquake which struck at 10:31 a.m. HST Thursday, May 3, 2018. Map via USGS.

USGS reports quake was 5.0 magnitude Thursday morning (May 3)

The U.S. Geological Survey’s Hawaiian Volcano Observatory (HVO) recorded a magnitude-5.0 earthquake on Thursday, May 3, 2018, at approximately 10:31 a.m. HST.

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A portion of Hawai‘i Volcanoes National Park is closed due to potential volcanic hazards

Due to the possibility of a new eruption and unstable geologic activity, park management closed 15,688 acres near Kīlauea Volcano’s Pu‘u ‘Ō‘ō vent to the ocean.

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Recent earthquakes in the Puna area as of 10:22 a.m. Wednesday, May 2, 2018. Map via USGS

High rate of quakes continue in Puna as magma moves in east rift zone

According to a Civil Defense briefing early Tuesday, a magma dike, or pathway of rising magma, is making its way down to the lower Puna area past Pahoa-Kalapana Road (Route 130). Residents should prepare in case an eruption forces an evacuation.

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Pu‘u ‘Ō‘ō Crater floor appears to have partially collapsed Monday (April 30)

Monday afternoon (April 30) a thermal webcam on Pu‘u ‘Ō‘ō Crater’s rim shows small explosions as the crater floor collapsed.

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Overflows from the perched lava pond within west pit, a small crater adjacent to the main Pu‘u ‘Ō‘ō crater on Kīlauea Volcano’s East Rift Zone, continue to build up the levees around the pond. The rising level of the perched lava pond during the past month is a sign of the increasing pressure within the magma system beneath Pu‘u ‘Ō‘ō. This overflow, captured by a USGS-Hawaiian Volcano Observatory time-lapse camera, occurred on April 17, 2018. Photo taken Tuesday, April 17, 2018 courtesy of U.S. Geological Survey

Volcano Watch: Do recent changes herald the opening of a new vent on Pu‘u ‘Ō‘ō?

Pu‘u ‘Ō‘ō appears to be at a critical juncture, and USGS Hawaiian Volcano Observatory scientists are closely monitoring it and will provide updates if and when conditions change.

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Volcano Watch: Kilauea activity update for April 5, 2018

This past week, Kīlauea Volcano’s summit lava lake level fluctuated with summit inflation and deflation, ranging about 24–30 m (79–98 ft) below the vent rim.

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