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Having a (volcanic) field day in California

Having a (volcanic) field day in California

Today we feature volcanoes that are outstanding in their fields - volcanic fields, that is!

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Volcano Watch — Legends of Eruptions Past

Volcano Watch — Legends of Eruptions Past

Active volcanoes tell us their stories through earthquakes, deformation, gas emissions, and lava flows. We interpret those stories through myriad...

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What makes Long Valley's resurgent dome reach for the skies?

What makes Long Valley's resurgent dome reach for the skies?

While the huge caldera-forming eruption of Long Valley was 767,000 years ago, between about 670,000 and 570,000 years ago uplift of the caldera's...

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New USGS Data Releases Provide Data on Kīlauea and Mauna Loa

New USGS Data Releases Provide Data on Kīlauea and Mauna Loa

Several USGS data releases published in 2023 provide data on Kīlauea summit water lake present in Halemaʻumaʻu from 2019-2020, lava samples collected...

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Volcano Watch — Ups and downs at Kīlauea summit: Quiescence, eruptions, and constant change

Volcano Watch — Ups and downs at Kīlauea summit: Quiescence, eruptions, and constant change

May 3rd, 2023, marked the fifth anniversary of the start of Kīlauea’s historic 2018 eruption that resulted in extensive lava flows from the East Rift...

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Recent large earthquakes near Lassen are just another day in the Basin and Range

Recent large earthquakes near Lassen are just another day in the Basin and Range

Since May 11, 2023, a series of M5+ earthquakes and aftershocks have rattled the area around Lake Almanor, a reservoir about 20 miles (32 km)...

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Volcano Watch — Explosive Eruptions from Halemaʻumaʻu in 1924

Volcano Watch — Explosive Eruptions from Halemaʻumaʻu in 1924

May 2023 marks the 99th anniversary of a sequence of explosive eruptions from Kīlauea's summit that occurred over 16 days from May 11–27, 1924. During...

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The story of the faulted field: How Pinnacles ended up almost 200 miles north of its birthplace

The story of the faulted field: How Pinnacles ended up almost 200 miles north of its birthplace

One of California's coastal volcanic fields, the Pinnacles volcanic field (or Pinnacles National Park) is an eroded collection of mostly rhyolite lava...

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Photo and Video Chronology – Kīlauea Summit Overflight, Seismic Imaging Project Continues, Vibroseis Demonstration – May 6, 2023

Photo and Video Chronology – Kīlauea Summit Overflight, Seismic Imaging Project Continues, Vibroseis Demonstration – May 6, 2023

HVO scientists conducted a Kīlauea summit overflight on May 3, 2023. The Kīlauea Seismic Imaging Project continues, as more nodes are deployed in the...

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Volcano Watch — Five years flow by: reflections on the destructive 2018 eruption of Kīlauea

Volcano Watch — Five years flow by: reflections on the destructive 2018 eruption of Kīlauea

Five years ago, volcanic activity at Kīlauea dramatically changed when magma intruded into the lower East Rift Zone (LERZ). What happened at Kīlauea...

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Photo and Video Chronology – Halema‘uma‘u overflight and fieldwork; update on the Kīlauea Seismic Imaging Project – May 3, 2023

Photo and Video Chronology – Halema‘uma‘u overflight and fieldwork; update on the Kīlauea Seismic Imaging Project – May 3, 2023

HVO scientists conducted  Halema‘uma‘u fieldwork and a Kīlauea summit overflight on May 3, 2023. The Kīlauea Seismic Imaging Project continues, as...

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