Tag Archive | "usgs"

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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Zooming in on the lava lake, a closer camera view of the spattering lake surface late this afternoon. Photo taken Tuesday, August 23, 2016 courtesy of USGS/HVO

Halemaumau lava lake rises to highest levels since May 2015

The lava lake surface level has risen and is approximately 20 m (66 ft) below the crater rim. This is among the highest measured levels of the lake since May 2015.

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Kilauea 61g lava flow ocean entry widens

The flow is entering the sea at several places near Kamokuna, building an increasingly large lava delta at the base of the sea cliff.

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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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On Friday evening, breakouts from the east side of lava flow "61g" provided good viewing for visitors who walked in from the Kalapana viewing area. Photo taken Friday, August 12, 2016 courtesy of USGS/HVO

Kilauea 61g lava flow continues spilling into the ocean

The 61G lava flow, extending southeast of Puʻu ʻŌʻō on Kīlauea’s south flank, continued to be active and to enter the sea at multiple places near Kamokuna.

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Kilauea 61G lava flow continues with mutiple ocean entries

The 61G lava flow, extending southeast of Puʻu ʻŌʻō on Kīlauea’s south flank, continued to be active and to enter the sea at multiple places near Kamokuna.

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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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Aug 26, 2016 / 5:15 pm

 

 

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