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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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Photo and Video Chronology - Mauna Loa - September 19, 2015

Photo and Video Chronology - Mauna Loa - September 19, 2015

Panorama of the north rim of Mauna Loa's summit caldera; an HVO geologist checks Mauna Loa monitoring equipment.

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USGS Volcano Alert Level for Mauna Loa Elevated from Normal to Advisory Status

USGS Volcano Alert Level for Mauna Loa Elevated from Normal to Advisory Status

Scientists at the U.S. Geological Survey Hawaiian Volcano Observatory have elevated the Volcano Alert Level for Mauna Loa from NORMAL to ADVISORY...

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Volcano Watch — The Art (and Science) of Assigning Volcano Alerts Levels

Volcano Watch — The Art (and Science) of Assigning Volcano Alerts Levels

The USGS Hawaiian Volcano Observatory (HVO) changed the Volcano Alert Level and Aviation Color Code for Mauna Loa Volcano from NORMAL/GREEN to...

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Photo and Video Chronology - Mauna Loa - September 17, 2015

Photo and Video Chronology - Mauna Loa - September 17, 2015

Mauna Loa earthquake and deformation data between 2010 and September 17, 2015.

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USGS HVO Press Release — USGS Volcano Alert Level for Mauna Loa Elevated from Normal to Advisory Status

USGS HVO Press Release — USGS Volcano Alert Level for Mauna Loa Elevated from Normal to Advisory Status

Scientists at the U.S. Geological Survey Hawaiian Volcano Observatory have elevated the Volcano Alert Level for Mauna Loa from NORMAL to ADVISORY.

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Photo and Video Chronology - Kīlauea - September 11, 2015

Photo and Video Chronology - Kīlauea - September 11, 2015

Photo and Video Chronology - Kīlauea - September 11, 2015

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Volcano Watch — George Kojima was HVO’s MacGyver decades before the MacGyver TV show

Volcano Watch — George Kojima was HVO’s MacGyver decades before the MacGyver TV show

During the 1950s, a decade of major change in volcano monitoring, the USGS Hawaiian Volcano Observatory (HVO) was moving from the mechanical into the...

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Volcano Watch — From WATCH to WARNING and back: Kīlauea Volcano's status changes during past year

Volcano Watch — From WATCH to WARNING and back: Kīlauea Volcano's status changes during past year

This week marks the one-year anniversary of when the June 27th lava flow, named for the date in 2014 that it began erupting from Pu‘u ‘Ō‘ō on Kīlauea...

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Photo and Video Chronology - Mauna Loa - August 28, 2015

Photo and Video Chronology - Mauna Loa - August 28, 2015

Continuous gas-monitoring site in Moku‘āweoweo Caldera, Mauna Loa.

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Photo and Video Chronology - Kīlauea - August 28, 2015

Photo and Video Chronology - Kīlauea - August 28, 2015

New lava flows at Pu‘u ‘Ō‘ō

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Volcano Watch — What happens to lava flows after they enter the ocean?

Volcano Watch — What happens to lava flows after they enter the ocean?

Does lava continue to flow exactly as it did on land or does it behave differently after it enters the ocean?

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Volcano Watch — The Overflows of Halema‘uma‘u Crater

Volcano Watch — The Overflows of Halema‘uma‘u Crater

In early 1918, visitors swarmed to Kīlauea Volcano to see a splendid show. The molten lake in Halema‘uma‘u had been rising and the pit was almost full...

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