Tag Archive | "volcano watch"

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Volcano Watch: Kilauea activity update for September 22, 2016

Kīlauea continues to erupt at its summit and East Rift Zone. The summit lava lake level varied between 33–92 feet below the vent rim within Halema‘uma‘u Crater. The 61g lava flow continued to enter the ocean near Kamokuna.

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On September 10, 2016, Kīlauea Volcano’s summit lava lake rose to within 5 m (16 ft) of the vent rim (shown above). This is the highest level the lake has reached since it overflowed the vent in April-May 2015, when lava flowed onto the floor of Halemaʻumaʻu Crater, forming the dark-colored rock visible on either side of the vent. Charred and broken fencing (upper left) is all that remains of a former visitor overlook, closed to the public since 2008 due to explosions, volcanic gas emissions, and other hazards associated with the lava lake. USGS photo.

Volcano Watch: The rise and fall of Kīlauea’s summit lava lake – what’s happening and what does it mean?

When Halemaumau’s lava lake level is high, vigorous spattering on the lake surface creates a dazzling display, especially after dark, when the incandescent lava lights up the night sky.

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The lava lake at the summit of Kīlauea remained at a high level today, about 18 m (60 ft) from the floor of Halemaʻumaʻu Crater at the time of this photo. Photo taken Monday, September 12, 2016 courtesy of USGS/HVO

Volcano Watch: Kilauea activity update for September 15, 2016

During the past week the summit lava lake level generally varied between about 36–69 feet below the vent rim within Halema‘uma‘u Crater, but reached 16-20 feet below the rim on Saturday, Sept. 10.

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Volcano Watch: Kilauea activity update for September 8, 2016

During the past week, in concert with summit inflation and deflation, the summit lava lake level varied between about 16 m and 36.5 m (52–120 ft) below the vent rim within Halema‘uma‘u Crater.

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Print Book 6.1

Volcano Watch: Jaggar’s prediction comes true—the 1935 eruption of Mauna Loa

After working for 20 years building the Hawaiian Volcano Observatory (HVO), Thomas Jaggar had achieved almost everything he set out to do.

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Volcano Watch: Kilauea activity update for August 31, 2016

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

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Volcano Watch: Charcoal is good for more than the barbeque

To help determine the timing of eruptive activity, geologists use a radiocarbon age-dating technique. Collecting charcoal is the most common method used in Hawaii, not only by geologists, but also by archaeologists, ecologists, and others.

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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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Sep 23, 2016 / 5:15 pm

 

 

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