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Volcano Watch — Two hundred years of written observations of Kīlauea’s summit activity

Volcano Watch — Two hundred years of written observations of Kīlauea’s summit activity

On August 1, 1823, an English missionary named William Ellis visited Kīlauea caldera with his Hawaiian guides on a tour of the Island of Hawaiʻi.  He...

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Fall into a burning (curtain) of fire with fissure eruptions

Fall into a burning (curtain) of fire with fissure eruptions

If you've been following the latest geological news, you'll have noticed the brand new eruption on Iceland's Reykjanes Peninsula. It's a classic...

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Out with the old, in with the new: Upgrading satellite communication technology at Yellowstone monitoring sites

Out with the old, in with the new: Upgrading satellite communication technology at Yellowstone monitoring sites

New satellite communication technology is being tested at Yellowstone monitoring stations and could have a big impact on how real-time data are...

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Volcano Watch — International volcano scientist training course returns to Hawaii

Volcano Watch — International volcano scientist training course returns to Hawaii

The Center for the Study of Active Volcanoes (CSAV) is holding its annual summer International Training Course in Volcano Hazards Monitoring. This...

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The Mystery of the Noon Booms Part 2

The Mystery of the Noon Booms Part 2

In last week's post (https://www.usgs.gov/observatories/calvo/news/mystery-noon-booms-part-1), we challenged you to give us your best hypotheses as to...

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Volcano Watch — Tracking down Mauna Loa’s carbon dioxide

Volcano Watch — Tracking down Mauna Loa’s carbon dioxide

When lava poured out over the floor of Moku‘āweoweo, Mauna Loa’s summit caldera, late on the night of November 27, 2022, it was still many hours away...

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The Mystery of the Noon Booms: Part 1

The Mystery of the Noon Booms: Part 1

Just in time for the Fourth of July, CalVO scientists have been seeing some interesting - but unusual - acoustic signals on our seismometers. 

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Volcano Watch — What is the highest elevation reached by Halemaʻumaʻu lava?

Volcano Watch — What is the highest elevation reached by Halemaʻumaʻu lava?

The 2018 collapse of southern Kaluapele (Kīlauea caldera) left a pit whose lowest point was about 500 m (1640 ft) above sea level (asl). Since 2020...

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Bubble trouble? Tracking changing hydrothermal features in Long Valley's Hot Creek

Bubble trouble? Tracking changing hydrothermal features in Long Valley's Hot Creek

If you spend time in Long Valley, you may have noticed some changes in the Hot Creek springs and pools following this winter's dramatic snows...

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Volcano Watch — Unveiling Earth's magnetic secrets: paleomagnetism and its geological applications

Volcano Watch — Unveiling Earth's magnetic secrets: paleomagnetism and its geological applications

When we think about the Earth's magnetic field, we often associate it with compasses and navigation. However, did you know that our planet's magnetic...

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We're ready for our closeup! Filming virtual field trip stops in the Clear Lake Volcanic Field

We're ready for our closeup! Filming virtual field trip stops in the Clear Lake Volcanic Field

California Volcano Monitor: This past week, you might have seen a truck full of geologists toting video equipment around the Clear Lake Volcanic Field...

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