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Daily updates about ongoing eruptions, recent images and videos of summit and East Rift Zone volcanic activity, maps, and data about recent earthquakes in Hawaii are posted on the HVO website.

Volcano Watch is a weekly article and activity update written by U.S. Geological Survey Hawaiian Volcano Observatory scientists and colleagues.

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April 30, 2020

Photo and Video Chronology - Mauna Loa - April 30, 2020

Mauna Loa summit mission-critical fieldwork: MultiGAS installation

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April 30, 2020

Volcano Watch — Looking for maps? GIS data? Try the HVO publications page!

Many messages to AskHVO (askHVO@usgs.gov) request resources relating to geologic maps and geographic information systems (GIS) data. "Is there a map...

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April 27, 2020

Photo and Video Chronology - Mauna Loa - April 27, 2020

Mauna Loa summit shadow

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April 23, 2020

Volcano Watch — Increasing magma pressure most likely culprit in triggering the 2018 Kīlauea eruption

This week, many of us read news coverage of a recent study suggesting that unusually heavy rainfall triggered the 2018 eruption of Kīlauea. To address...

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April 21, 2020

Photo and Video Chronology - Kīlauea - April 21, 2020

Continued slow rise of water in Halema‘uma‘u

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April 16, 2020

Volcano Watch — April 1980 was a month to remember at Mount St. Helens

Mount St. Helens was exploding! The first eruption in the Cascades since 1914–1917 (Lassen Peak) started on March 27, 1980. April became a frenzied...

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April 13, 2020