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  2. Long Valley Caldera - Wikipedia

    en.wikipedia.org/wiki/Long_Valley_Caldera

    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. Long Valley was formed 760,000 years ago when a very large eruption released hot ash ...

  3. Bishop Tuff - Wikipedia

    en.wikipedia.org/wiki/Bishop_Tuff

    The Bishop Tuff is a welded tuff which formed 764,800 ± 600 years ago as a rhyolitic pyroclastic flow during the approximately six-day eruption that formed the Long Valley Caldera. [1] [2] [3] Large outcrops of the tuff are located in Inyo and Mono Counties, California, United States. Approximately 200 cubic kilometers of ash and tuff erupted ...

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

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

    The Long Valley Caldera was formed by a super-eruption about 760,000 years ago that blasted 140 cubic miles of magma, covering much of east-central California in hot ash that was blown as far away ...

  5. Mount Baker - Wikipedia

    en.wikipedia.org/wiki/Mount_Baker

    The east side of Mount Baker in 2001. Sherman Crater is the deep depression south of the summit. Mount Baker (Nooksack: Kweq' Smánit; Lushootseed: təqʷubəʔ), [9] also known as Koma Kulshan or simply Kulshan, is a 10,781 ft (3,286 m) active [10] glacier-covered andesitic stratovolcano [4] in the Cascade Volcanic Arc and the North Cascades of Washington State in the United States.

  6. 'High threat' supervolcano could bring about an ice age when ...

    www.aol.com/news/2017-03-30-high-threat-super...

    A long-quiet yet massive super volcano, dubbed the "Long Valley Caldera," has the potential to unleash a fiery hell across the planet, and the magma-filled mountain has a history of doing so.

  7. Novarupta - Wikipedia

    en.wikipedia.org/wiki/Novarupta

    Novarupta. Novarupta[a] is a volcano that was formed in 1912, located on the Alaska Peninsula on a slope of Trident Volcano in Katmai National Park and Preserve, about 290 miles (470 km) southwest of Anchorage. Formed during the largest volcanic eruption of the 20th century, Novarupta released 30 times the volume of magma of the 1980 eruption ...

  8. Mount St. Helens - Wikipedia

    en.wikipedia.org/wiki/Mount_St._Helens

    Hike via south slope of volcano (closest area near eruption site) Mount St. Helens (known as Lawetlat'la to the indigenous Cowlitz people, and Loowit or Louwala-Clough to the Klickitat) is an active stratovolcano located in Skamania County, Washington, [1] in the Pacific Northwest region of the United States. It lies 52 miles (83 km) northeast ...

  9. Lake Ilopango - Wikipedia

    en.wikipedia.org/wiki/Lake_Ilopango

    Lake Ilopango. Lake Ilopango is a crater lake which fills an 8 by 11 km (72 km 2 or 28 sq mi) volcanic caldera in central El Salvador, on the borders of the San Salvador, La Paz, and Cuscatlán departments. [1] The caldera, which contains the second largest lake in the country and is immediately east of the capital city, San Salvador, has a ...