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United States · Stratovolcano

Mount Tehama

Lassen Volcanic Center

Type
Stratovolcano
Elevation
3187m
Last eruption
1917
Mount Tehama
Photo: Ryan Grimm · CC BY-SA 3.0 · Wikimedia Commons
Type
Stratovolcano
Country
United States
Region
North America / High Cascades Volcanic Arc
Elevation
3187m
Coordinates
40.492, -121.508
Last eruption
1917
Tectonic setting
Subduction zone / Continental crust (> 25 km)
Landform
Composite
Major rock type
Andesite / Basaltic andesite

Geological summary

The Lassen Volcanic Center consists of the andesitic Brokeoff stratovolcano SW of Lassen Peak, a dacitic lava dome field, peripheral small andesitic shield volcanoes, and large lava flows, primarily on the Central Plateau NE of Lassen Peak.

Excerpt from the Global Volcanism Program, Smithsonian Institution · Read the full summary on GVP →

From Wikipedia

Mount Tehama is an eroded extinct andesitic stratovolcano in the Cascade Volcanic Arc and the Cascade Range in Northern California. Part of the Lassen volcanic area, its tallest remnant, Brokeoff Mountain, is itself the second highest peak in Lassen Volcanic National Park and connects to the park's highest point, Lassen Peak. Located on the border of Tehama County and Shasta County, Brokeoff's peak is the highest point in the former. The hikers that summit this mountain each year are treated to "exceptional" views of Lassen Peak, the Central Valley of California, and many of the park's other features. On clear days, Mount Shasta can also be seen in the distance.

Wikipedia · CC BY-SA · Read full article →

Eruption history

6 recordedGlossary

Record summary

Confirmed eruptions
5
Uncertain eruptions
1
Span of confirmed record
800 (±300 yrs) – 1917
Largest confirmed eruption
VEI 3 (1914, the most recent of 2)
Confirmed eruptions since 1900
1
Summary (VEI over time)
Click a bar to see individual eruptions · Use arrow keys to move between bars, Enter to open
800~911 · 2 eruptions · max VEI ?911~1023 · 1 eruptions · max VEI ?1580~1691 · 2 eruptions · max VEI 31803~1914 · 1 eruptions · max VEI 38001023135715801803

Detailed timeline

  1. 1914VEI 3Observed
    1914-05-30 – 1917-06-29
    Lassen Peak
  2. 1666VEI 3Geological estimate
    1666 – end unknown
    Cinder Cone
  3. 1650VEI ?Method not stated
    1650 – end unknown
    Chaos Crags
  4. 980 (±300 yrs)VEI ?Geological estimate
    980 – end unknown
    Chaos Crags
  5. 880 (±300 yrs)VEI ?Geological estimate
    880 – end unknown
    Chaos Crags
  6. 800 (±300 yrs)VEI ?Geological estimate
    800 – end unknown
    Chaos Crags

Nearby volcanoes

External links

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