Tag Archive | "usgs"

The lava lake within Halemaʻumaʻu, a crater at the summit of Kīlauea, was about 30 m (98 ft) below the vent rim on the day of this photo (Jan. 7, 2016). Orange lines on the lake surface were the result of lava lake circulation; as lava moved from left to right, sections of the dark-colored, semi-solid lake surface pulled apart, revealing incandescent molten lava beneath the crust. Vigorous spattering (bright yellow area at right) often occurs where circulating lava sinks back into the lake. USGS photo by T. Orr.

Volcano Watch: New USGS video about Kīlauea Volcano’s summit eruption is now online

(Volcano Watch is a weekly article written by scientists at the U.S. Geological Survey’s Hawaiian Volcano Observatory.) In March 2008, a new volcanic vent opened within Halema‘uma‘u, a crater at the summit of Kīlauea in Hawaiʻi Volcanoes National Park on the Island of Hawaiʻi. The eruption continues today, with continuous degassing, occasional explosive events, and […]

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Volcano Watch: Kilauea activity update for October 19, 2017

On the East Rift Zone, the 61g flow remained active, with lava reaching the Kamokuna delta and surface breakouts downslope of Pu‘u ‘Ō‘ō.

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Damage to an unreinforced rock wall at Kalāhikiola Church in Kapa‘au, North Kohala, on the Island of Hawai‘i, following the magnitude-6.6 Kīholo and magnitude-6.0 Māhukona earthquakes in October 2006. USGS photo by J. Takahashi.

Volcano Watch: Reminders to be prepared for Nature’s fury

As we Drop! Cover! and Hold On! during this year’s Great Hawaiʻi ShakeOut let’s also dedicate a quiet moment to those adversely impacted by recent earthquakes.

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Time-lapse image of multiple lava cascades on the sea cliff on October 4 at 3:31 am (HST). Just a few of the many resulting surface flows can be seen on the delta both below the cliff and near the front, which is lit by lava and moonlight. Photo taken Friday, October 6, 2017 courtesy of USGS/HVO

Volcano Watch: Kilauea activity update for October 12, 2017

This past week, Kīlauea Volcano’s summit lava lake level fluctuated with summit inflation and deflation, ranging about 32–39 m (105–128 ft) below the vent rim.

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Volcano Watch: Modeling Kīlauea Volcano a Century Ago

(Volcano Watch is a weekly article written by scientists at the U.S. Geological Survey’s Hawaiian Volcano Observatory.) In today’s age of aerial photography, satellites, and drones, bird’s-eye views of geologic features are taken for granted. A century ago, such depictions posed enormous challenges. At first glance, the attached images appear to be aerial photographs of […]

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Volcano Watch: Kilauea activity update for October 5, 2017

Mauna Loa is not erupting. During the past week, small-magnitude earthquakes continued to occur beneath the summit caldera and upper Southwest Rift Zone, primarily at depths less than 3 miles.

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Volcano Watch: Kilauea activity update for September 28, 2017

This past week, Kīlauea Volcano’s summit lava lake level fluctuated with summit inflation and deflation and ranged about 112–174 feet below the vent rim.

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Volcano Watch: Legacy of the Mount St. Helens 1980 eruption still defies perfect solution

Thirty-seven years after the eruption of Mount St. Helens scientists, engineers, land managers, and Federal, State, and County officials are grappling with the challenge on how to prevent potentially massive downstream flooding from Spirit Lake, located at the base of the volcano.

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Volcano Watch: Thermal maps help with the pāhoehoe challenge

Over the past few years, HVO geologists developed a new technique to map activity across the entire surface of a pāhoehoe flow with a handheld thermal camera.

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Volcano Watch: Kilauea activity update for September 21, 2017

On the East Rift Zone, the 61g flow remained active, with lava entering the ocean near Kamokuna and surface breakouts downslope of Pu‘u ‘Ō‘ō.

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Mangitude 4.2 quake shakes Oahu Friday (Sept 15)

The U.S. Geological Survey’s Hawaiian Volcano Observatory (HVO) recorded a magnitude-4.2 earthquake located off the northeast coast of O‘ahu on Friday, September 15, 2017, at 8:40 p.m. HST.

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Aerial view of Mauna Loa erupting on the morning of March 25, 1984, the first day of the volcano’s most recent eruption. The lava flow was advancing southeast, toward Kīlauea, from fissure vents at an elevation of about 11,200 feet on Mauna Loa’s Northeast Rift Zone. Moku‘āweoweo, Mauna Loa’s summit caldera, is visible at top left. USGS photo by J.P. Lockwood.

Volcano Watch: Mauna Loa update: unrest continues, but the outcome is uncertain

What’s up with Mauna Loa, and is any change in sight? Should residents relax or stay vigilant?

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Oct 20, 2017 / 5:15 pm

 

 

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