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  2. California Volcano Observatory - Wikipedia

    en.wikipedia.org/wiki/California_Volcano_Observatory

    According to USGS risk assessment of the volcanoes in CalVO's region, the following volcanoes were ranked "very high threat potential". [4] Mount Shasta in far-northern California, north of Redding; Lassen Volcanic Center in Lassen Volcanic National Park; Long Valley Caldera in eastern California; Mono-Inyo Craters. These were ranked "high ...

  3. Round Mountain (California) - Wikipedia

    en.wikipedia.org/wiki/Round_Mountain_(California)

    The volcano is credited with the creation of the High Valley through repeated eruptions the last of which is thought to have occurred 8,500–10,000 years ago. The result was an elevated valley at approximately 1,600 ft (490 m) in elevation with distinct ridgelines reaching up to 3,000 ft (910 m).

  4. Lassen Peak - Wikipedia

    en.wikipedia.org/wiki/Lassen_Peak

    About 3 million years ago, the southern limit of active volcanoes in the Cascades corresponded to the Yana Volcanic Center 19 mi (30 km) to the south of Lassen Peak, but currently the southern edge of the Lassen Volcanic National Park now marks the same border, indicating that the Cascade Arc's southern end migrates at a rate of 0.4 to 1 in (1. ...

  5. One of California's riskiest volcanoes has been seeing more ...

    www.aol.com/news/more-quakes-one-californias...

    One of California's riskiest volcanoes has for decades been undergoing geological changes and seismic activity, which are sometimes a precursor to an eruption, but — thankfully — no ...

  6. Salton Buttes - Wikipedia

    en.wikipedia.org/wiki/Salton_Buttes

    Since the volcanoes have erupted in the past, there is present-day unrest, and there are areas of high population density nearby (about 2,518 people lived in the area in 2010 [60]), the Salton Buttes are considered high-hazard volcanoes. [61] [62] Future eruptions may generate pyroclastic flows and pyroclastic surges, which could endanger ...

  7. Timeline of volcanism on Earth - Wikipedia

    en.wikipedia.org/wiki/Timeline_of_volcanism_on_Earth

    Supervolcano – Volcano that has had an eruption with a volcanic explosivity index (VEI) of 8; Trans-Mexican Volcanic Belt – Active volcanic belt that covers central-southern Mexico; Volcanic arc – Chain of volcanoes formed above a subducting plate; Volcanic explosivity index – Predictive Qualitative scale for explosiveness of volcanic ...

  8. Long Valley Caldera - Wikipedia

    en.wikipedia.org/wiki/Long_Valley_Caldera

    Map of Long Valley Caldera Early winter in Long Valley, 2017. Long Valley Caldera is a depression in eastern California that is adjacent to Mammoth Mountain.The valley is one of the Earth's largest calderas, measuring about 20 mi (32 km) long (east-west), 11 mi (18 km) wide (north-south), and up to 3,000 ft (910 m) deep.

  9. Lassen Volcanic National Park, CA Weather - Hourly Forecasts ...

    www.aol.com/weather/forecast/united-states/...

    Get the Lassen Volcanic National Park, CA local weather forecast by the hour and the next 10 days. Skip to main content. Sign in. Mail. 24/7 Help. For premium support please call: 800-290-4726 ...