Tag Archive | "volcano watch"

Sketch map of Halemaumau, July 1909, J.M. Lydgate;
showing Old Faithful, areas of activity, sulphur fumes, caves, Fallen-in
Areas.

Volcano Watch: Kīlauea Volcano’s “Old Faithful”—a thing of the past

The Island of Hawai‘i once had its own “Old Faithful,” composed of lava rather than boiling water, located in Halema‘uma‘u Crater at the summit of Kīlauea.

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Volcano Watch: Kilauea activity update for August 25, 2016

Kīlauea continues to erupt at its summit and East Rift Zone. During the past week, the summit lava lake level varied between about 20 m and 40 m (66–131 ft) below the vent rim within Halema‘uma‘u Crater.

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People who venture too close to Kīlauea's Kamokuna ocean entry—by land or by sea—are at risk from multiple hazards associated with lava flowing into the sea. The white plume formed by the interaction of lava and seawater is a corrosive mixture of super-heated steam, hydrochloric acid, and tiny particles of volcanic glass, all of which should be avoided. Lava deltas (new land formed at the ocean entry) can collapse without warning. Should the lava delta shown here collapse, fragments of molten lava and blocks of hot rock would be thrown both inland and seaward, potentially impacting people on the cliff above the ocean entry and in the boat in front of the delta. Photo taken Tusday, August 16, 2016 courtesy of USGS/HVO

Volcano Watch: Kilauea activity update for August 18, 2016

Kīlauea continues to erupt at its summit and East Rift Zone. On the East Rift Zone, the “61g” flow continued to advance across the coastal plain and enter the ocean.

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Volcano Watch: August 6 explosive event at Kīlauea Volcano’s summit just one among many

The explosive event at Halemaʻumaʻu Crater’s lava lake on August 6, 2016, was the latest in a series that began in 2008.

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The explosive event blanketed the rim of Halemaʻumaʻu Crater with a layer of tephra (volcanic rock fragments) up to about 20 cm (8 in) thick. The tephra deposit was thickest to the east of the former visitor overlook on the crater rim (shown here), where it formed a continuous layer. Bombs were thrown up to 90 m (295 ft) beyond the crater rim at the overlook and were deposited over an area 220 m (720 ft) wide along the rim. Saturday night's explosive event is a reminder of why this area remains closed. Had anyone been standing in this area when it occurred, that person would have been severely burned or killed by the falling debris. Photo taken Monday, August 8, 2016 courtesy of USGS/HVO

Volcano Watch: Kīlauea summit lava lake explosion reminds us of significant, ongoing hazards around Halemaʻumaʻu Crater

At 10:02 p.m., HST, on Saturday, August 6, a section of altered, thermally-stressed rock enclosing the Halemaʻumaʻu Crater lava lake detached from the vent wall and plummeted into the molten lava.

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Volcano Watch: Kilauea activity update for August 11, 2016

On the East Rift Zone, the “61g” flow continued to advance across the coastal plain and enter the ocean at multiple points. The lava flow does not pose an immediate threat to nearby communities.

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During the 2016 International Training Program on the Island of Hawaiʻi, a USGS Hawaiian Volcano Observatory scientist (center, white shirt) demonstrated how to use Global Positioning System (GPS) equipment to measure precise locations of points on Earth’s surface. Such information can be used to track unrest at volcanoes around the world and helps scientists to better forecast hazardous volcanic activity. Photo courtesy of UHH Center for the Study of Active Volcanoes.

Volcano Watch: Hawai‘i’s role in reducing volcanic risk around the world

Today, more than 800 million people—ten percent of the world’s population—live within 100 km (62 mi) of active, potentially deadly volcanoes.

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Volcano Watch: Kilauea activity update for August 4, 2016

During the past week, the summit lava lake level varied between about 85–135 feet below the vent rim within Halema‘uma‘u Crater.

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The summit lava lake in Halemaʻumaʻu Crater continuously circulates, with lava upwelling on one side of the lake and downwelling on the opposite side, often resulting in vigorous spattering (bright spot on left side of lake). As it circulates, sections of the dark-colored, semi-solid lake surface pull apart, revealing the incandescent molten lava beneath and creating the appearance of a jigsaw puzzle. This evening, the lava lake surface was about 26 m (85 ft) below the vent rim. The silhouette of Mauna Loa is visible in upper right. Photo taken Wednesday, July 27, 2016 courtesy of USGS/HVO

Volcano Watch: Kilauea activity update for July 28, 2016

Kīlauea continues to erupt at its summit and East Rift Zone. During the past week, the summit lava lake level varied between about 70–85 feet below the vent rim within Halema‘uma‘u Crater

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Less than 24 hours after first reaching the sea in the early morning hours of July 26, lava spilling over the sea cliff and into the ocean had started building a foundation of loose lava fragments on which a new lava delta can form. Lava deltas are extremely dangerous because they can collapse into the ocean without warning, triggering explosions that hurl rocks on and off shore, and sending waves of scalding water onto the coast. The area of active lava pouring over this sea cliff is about 20 m (66 ft) wide and the cliff is about 20 m (66 ft) high. USGS photo.

Volcano Watch: Beware the perilous beauty of lava entering the ocean

Four main hazards associated with lava flowing into the ocean include the sudden collapse of new land and adjacent sea cliffs into the ocean, explosions triggered by the collapse….

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Volcano Watch: Kīlauea Volcano’s eruptions offer picturesque viewing opportunities

The new vent opened on the eastern flank of Pu‘u ‘Ō‘ō and is now sending lava down the south flank of Kīlauea and across the coastal plain for the first time since 2013.

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Volcano Watch: Kilauea activity update for July 21, 2016

GPS measurements show deformation of Mauna loa related to inflation of a magma reservoir beneath the summit and upper Southwest Rift Zone, with inflation occurring mainly in the southwestern part of the magma storage complex.

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Aug 26, 2016 / 5:15 pm