Tag Archive | "volcano watch"

About 1300 earthquakes with magnitudes greater than 1 and at depths over 20 km (12 mi) on and around the Island of Hawaiʻi since August 2019 are depicted on this map. Most of the earthquakes were clustered beneath the southern edge of the island near the town of Pāhala. Blue and purple dots indicate earthquakes at 20-40 km (12-25 mi) and more than 40 km (25 mi) depths, respectively. USGS map by B. Shiro.

Volcano Watch: Why do so many deep earthquakes happen around Pāhala?

About 1300 earthquakes with magnitudes greater than 1 and at depths over 20 km (12 mi) on and around the Island of Hawaiʻi since August 2019.

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Halemaumau water lake. USGS/HVO Photo

Volcano Watch: Kilauea activity update for October 10, 2019

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

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Volcano Watch: Geologic history of Mauna Loa’s southeast flank revealed in new map

The recently published “Geologic map of the central-southeast flank of Mauna Loa volcano” is the culmination of years of fieldwork by the U.S. Geological Survey.

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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. 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. Photo courtesy of USGS/HVO

Volcano Watch: Kilauea activity update for October 3, 2019

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

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A USGS Hawaiian Volcano Observatory scientist, while assisting Alaska Volcano Observatory colleagues this summer, mounted a radio antenna on an upgraded seismic station at Great Sitkin Volcano in the western Aleutian Islands. USGS photo by A. Darold, 06-20-2019.

Volcano Watch: HVO staff lend a helping hand to Alaska colleagues

Volcano observatories across the United States work together to ensure efficient and thorough monitoring of the nation’s active volcanoes.

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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. 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 September 19, 2019

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

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Day-to-day changes in the water level at the bottom of Halema‘uma‘u are subtle and impossible to accurately measure. But when comparing views of the pond over several days some differences can be seen, as shown in these images. Rocks that were visible in the water on September 2 could no longer be seen today (September 5). Note particularly that two rocks protruding above the water at the top of the September 2 photo are now submerged—evidence that the pond continues to slowly rise. USGS photos by D. Swanson.

Volcano Watch: Kilauea activity update for September 5, 2019

Kῑlauea Volcano is not erupting and its USGS Volcano Alert level remains at NORMAL. Reflecting this level, HVO is now issuing monthly updates for Kīlauea.

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Volcano Watch: “Volcano Watch” receives national award

“Volcano Watch” was awarded First Place in the Electronic Publication category by the National Association of Government Communicators.

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Ash rises above Halemaʻumaʻu within Kīlauea’s summit caldera in this May 27, 2018, telephoto image from near Volcano House Hotel in Hawaiʻi Volcanoes National Park. By the time Kīlauea’s summit collapse events ended on August 2, Halema‘uma‘u was 2.5 km (1.5 mi) wide and 500 m (1600 ft) deep; prior to the 2018 collapses, it was about 1 km (0.5 mi) wide and 85 m (about 280 ft) deep. A segment of a long-closed Park trail is visible winding across the caldera floor (lower left). USGS photo by K. Anderson.  

Volcano Watch: New insights gained from Kīlauea Volcano’s 2018 summit collapses

A year ago, USGS Hawaiian Volcano Observatory scientists and Island of Hawaiʻi residents were in the throes of an historically unprecedented series of events for Kīlauea.

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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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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

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

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