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Lassen Volcanic National Park, California. Northeast side of Lassen Peak, showing the area devastated by mudflows and a lateral
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Lassen Volcanic Center

Lassen Volcanic Center

Lassen Volcanic Center has experienced hundreds of eruptions scattered over about 500 km2 (200 mi2) during the last 825,000 years.

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Lassen Volcanic National Park, California. Northeast side of Lassen Peak, showing the area devastated by mudflows and a lateral
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Lassen Volcanic Center

Lassen Volcanic Center

Lassen Volcanic Center has experienced hundreds of eruptions scattered over about 500 km2 (200 mi2) during the last 825,000 years.

Filter Total Items: 236
Center News
In a black-and-white photo, a snow-covered mountain peak is streaked with dark mud flowing down its sides in three directions. One flow directly faces the viewer, showing where trees have been mowed over by the debris. Elsewhere on the slopes, pine trees are scattered through the snow.

Last century's volcanic mudflows at Lassen Peak (May 22, 1915)

Illustrations
Shaded relief map showing Lassen Volcanic National Park, with Lassen Peak labeled in the northern portion of the map, Growler & Morgan hot springs to the southwest, and the June 24 2024 swarm to the southeast

Lassen Volcanic Center earthquake swarm of June 24, 2024

Illustrations
Helicorder record showing dozens of tiny earthquake traces occurring over 12 hours, with each line comprising 15 minutes and earthquakes looking like drum cymbals turned on their sides.

LSIB helicorder trace from the Lassen Volcanic Center on June 24, 2024.

Center News
A steaming hot spring and stream flow through the yellow-and-white altered rock of a hydrothermal area. A raised walkway is visible in the background.

Lassen Volcanic Center's June 24, 2024 earthquake swarm: (Background) business as usual

Photography
A steaming hot spring and stream flow through the yellow-and-white altered rock of a hydrothermal area. A raised walkway is visible in the background.

Devil's Kitchen hydrothermal area in the Lassen Volcanic Center

Center News
In a black-and-white photo, a small wooden cabin with a peaked roof and single door and window sits in a snowy forest clearing. Snow is piled to chest height around the building and blobs of snow cling to the peak of the roof.

A brief history of the Lassen Volcano Observatory (1926-1935)

Photography
A forest of burnt tree trunks with no leaves. A person in an orange vest and yellow hard hat is in the foreground.

Dixie Fire, Lassen Volcanic National Park, California (2021)

Presentations and Events

PubTalk 04/2015—"Fearfully Grand" Eruptions: Lassen Peak, CA, 1914-17

Historical
In a black-and-white photo, a small wooden cabin with a peaked roof and single door and window sits in a snowy forest clearing. Snow is piled to chest height around the building and blobs of snow cling to the peak of the roof.

Lassen Volcano Observatory, 1926

Photography
Lassen Peak's Devastated Area photographed from the air in 1994....

Lassen Peak's Devastated Area photographed from the air in 1994.

Charts or Graphs
Lassen Volcanic Center, California simplified hazards map showing p...

Lassen Volcanic Center, CA simplified hazards map

Photography
Geologic field-trip guide to Lassen Volcanic National Park and vici...

Geologic field-trip guide to Lassen Volcanic National Park

Photography
Lassen Peak viewed from the south at the summit of Brokeoff Volcano...

Lassen Peak viewed from the south at the summit of Brokeoff Volcano...

Research
Lassen Peak with the Loomis Hot Rock in the foreground, 1915 and 19...

The 1914-1917 Eruption of Lassen Peak

Photography
Collecting gases from a hot spring pool near Lassen Peak, California

Collecting gases from a hot spring pool near Lassen Peak, California

Photography
Chaos Crags in Lassen Volcanic National Park

View of Chaos Crags in Lassen Volcanic National Park from Lassen Peak.

Photography
Titanium tubed used to collect gas from a fumarole near Lassen Peak, California

Titanium tubed used to collect gas from a fumarole near Lassen, CA

Photography
Lassen Peak photographed from the Devastated Area about 4 hours bef...

Lassen Peak photographed from the Devastated Area about 4 hours bef...

Photography
Coring a ponderosa pine

WERC's Dr. Phil van Mantgem Cores Ponderosa Pine in Lassen NP

Photography
Lassen Peak photographed from the Devastated Area prior to the 1914...

Lassen Peak photographed from the Devastated Area prior to 1914-191...

Research
West-southwest facing view from Sunrise Peak toward Lassen Peak. ...

Eruption History of the Lassen Volcanic Center and Surrounding Region

Research
Lassen Volcanic Center, California simplified hazards map showing potential impact area for ground-based hazards during a volcan

Hazards Summary for Lassen Volcanic Center

Photography
In this black-and-white photos, a view up a valley shows a bare moonscape of mud, silt, and boulders. In the far distance, a mountain peak rises above lines of pine trees lining the valley's sides.

Mudflows in Lost Creek, Lassen, May 22 1915

Topic
Bumpass Hell, a hydrothermal area in Lassen Volcanic National Park....

Lassen Volcanic National Park

Research
Chaos Crags in Lassen Volcanic National Park

Landslides and Rockfalls at Lassen Volcanic Center

Presentations and Events

PubTalk 1/2012 — Lassen Volcanic National Park

Charts or Graphs
Volcano hazard zone map for Lassen Volcanic Region in Northern Cali...

Volcano hazard zone map for Lassen Volcanic Region in Northern CA p...

Research
Cinder Cone in Lassen Volcanic National Park

Lava Flows at Lassen Volcanic Center

Photography
Cinder Cone in Lassen Volcanic National Park

Cinder Cone in Lassen Volcanic National Park

Photography
In a black-and-white photo, a snow-covered mountain peak is streaked with dark mud flowing down its sides in three directions. One flow directly faces the viewer, showing where trees have been mowed over by the debris. Elsewhere on the slopes, pine trees are scattered through the snow.

Lava and mudflows from Lassen Peak, May 22, 1915

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