Archive | Volcano

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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Public can vote for Hawaiian Volcano Observatory to win award

Beginning Friday, May 10, members of the public can vote online (websites listed below) for the “People’s Choice Award” to honor the federal employee/team they believe has made the most significant contribution to the American people. Voting ends on July 8. The People’s Choice winner will be announced at a Partnership for Public Service event […]

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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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The start of fissure 3 during Kīlauea’s lower East Rift Zone eruption. Lava erupting to the surface cut across Kaupili Street around 7:00 a.m. on May 4, 2018. USGS photo by M. Patrick.

Volcano Watch: HVO geologists recall their first day of the 2018 lower East Rift Zone eruption 

With the one-year anniversary of the Lower East Rift Zone eruption, USGS Hawaiian Volcano Observatory staff, are reflecting on this historic event.

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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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magnitude-4.2 earthquake on Saturday, April 27, 2019, at 5:26 p.m. HST

A light 4.2M quake shakes Hawaii Island Saturday (April 27)

The U.S. Geological Survey’s Hawaiian Volcano Observatory (HVO) recorded a magnitude-4.2 earthquake on Saturday, April 27, 2019, at 5:26 p.m. HST.

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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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Damage survey on Crater Rim Drive. NPS Photo by Jessica Ferracane.

Hawaii Volcanoes National Park recaps repair work ahead the anniversary of Kīlauea caldera’s summit collapse

As the anniversary of the 2018 Kīlauea eruption nears, staff at Hawai‘i Volcanoes National Park continue efforts to repair and reopen trails, roads and more.

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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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Earthquakes (red dots) track the progression of the magmatic intrusion from Kīlauea Volcano's middle East Rift Zone to the lower East Rift Zone between April 30 and May 3, 2018. Orange triangles show the locations of fissure 1 (right), which erupted on May 3, and Puʻu ʻŌʻō (left). The earthquakes shown here are well-located with magnitudes less than 3.5 and depths shallower than 7 km (4.3 miles). USGS graphic.

Volcano Watch: What caused—or did not cause—the 2018 Kīlauea eruption?

The USGS has been asked if the eruption was caused by or related to geothermal drilling and energy production on Kīlauea’s East Rift Zone.

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A high-precision GPS unit (on white “T” in foreground) records its position at a ground control point along Pohoiki Road. This marker was painted in July 2018 and is visible in numerous aerial photographs taken by Hawaiian Volcano Observatory geologists throughout Kīlauea’s lower East Rift Zone eruption last summer. GPS data are recorded over a period of four minutes at each location, enabling vertical precision of approximately 18 cm (7 in). USGS photo by M. Zoeller, 03/22/2019.

Volcano Watch: Recent ground control survey helps finalize USGS lava thickness map

Some lava thicknesses on the preliminary map were slightly overestimated, while others were underestimated.

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