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Volcanic threat assessment helps prioritize risk reduction efforts at U.S. volcanoes

Volcanic threat assessment helps prioritize risk reduction efforts at U.S. volcanoes

The U.S. Geological Survey assesses active and potentially active volcanoes in the U.S., focusing on history, hazards and the exposure of people...

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Volcanic Threat Assessment help prioritize risk reduction efforts at U.S. volcanoes

Volcanic Threat Assessment help prioritize risk reduction efforts at U.S. volcanoes

Since 1980, there have been 120 eruptions and 52 episodes of notable volcanic unrest at 44 U.S. volcanoes.

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Photo and Video Chronology - Kīlauea - October 21, 2018

Photo and Video Chronology - Kīlauea - October 21, 2018

Great Hawaii ShakeOut

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Volcano Watch — Kīlauea hazard assessments include analyses of salts on volcanic ash

Volcano Watch — Kīlauea hazard assessments include analyses of salts on volcanic ash

Sulfur dioxide (SO2)-rich emissions have long been a feature of Kīlauea Volcano's summit activity. However, vigorous volcanic ash production during...

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Photo and Video Chronology - Kīlauea - October 15, 2018

Photo and Video Chronology - Kīlauea - October 15, 2018

Mauna Loa and Mauna Kea as seen from Kīlauea's lower East Rift Zone

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Volcano Watch — Aftershocks of the 2018 magnitude-6.9 earthquake expected to continue

Volcano Watch — Aftershocks of the 2018 magnitude-6.9 earthquake expected to continue

On May 4, 2018, a powerful magnitude-6.9 earthquake on the south flank of Kīlauea Volcano shook the Island of Hawai‘i. It was the largest quake in...

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New USGS Data Release Product

New USGS Data Release Product

Data Release: Volcanic ash leachate and rainwater chemistry from increased 2018 activity of Kīlauea Volcano, Hawaiʻi

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Volcano Watch — Volcano collapses mark the beginning and end of USGS scientist’s career

Volcano Watch — Volcano collapses mark the beginning and end of USGS scientist’s career

My 37-year stint with the U.S. Geological Survey—16 years at the Cascades Volcano Observatory (CVO) and 21 at the Hawaiian Volcano Observatory (HVO)...

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Photo and Video Chronology - Kīlauea - October 4, 2018

Photo and Video Chronology - Kīlauea - October 4, 2018

No significant changes at Fissure 8 or Pu‘u ‘Ō‘ō

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Photo and Video Chronology - Kīlauea - September 28, 2018

Photo and Video Chronology - Kīlauea - September 28, 2018

Before and after satellite images of Leilani Estates subdivision

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Volcano Watch — Tiltmeters measure tiny changes that can have big consequences

Volcano Watch — Tiltmeters measure tiny changes that can have big consequences

The USGS Hawaiian Volcano Observatory (HVO) uses a diverse set of instruments to monitor active volcanoes in Hawaii. These include seismometers, gas...

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Preliminary summary of Kīlauea Volcano's 2018 lower East Rift Zone eruption and summit collapse

Preliminary summary of Kīlauea Volcano's 2018 lower East Rift Zone eruption and summit collapse

Overview of Kīlauea Volcano's activity from April 30 through September 22, 2018.

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