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The Cascade volcanoes have had more than 100 eruptions over the past few thousand years, many of them explosive eruptions. [21] However, certain Cascade volcanoes can be dormant for hundreds or thousands of years between eruptions, and therefore the great risk caused by volcanic activity in the regions is not always readily apparent.
This is a list of Cascade volcanoes, i.e. volcanoes formed as a result of subduction along the Cascadia subduction zone in the Pacific Northwest of North America. The volcanoes are listed from north to south, by province or state: British Columbia , Washington , Oregon , and California .
The Cascade Volcanoes are an active volcanic region along the western side of the Pacific Northwest. The Columbia Plateau is a region of subdued geography that is inland of the Cascade Volcanoes, and the North Cascades are a mountainous region in the northwest corner of the United States, extending into British Columbia.
Campi Flegrei, a large dormant volcano near Naples, has a history of eruptions, and the last one was in 1538. Recently, increased seismic activity and rising land levels have raised concerns among ...
Mount Bachelor, formerly named Bachelor Butte, is a dormant stratovolcano atop a shield volcano in the Cascade Volcanic Arc and the Cascade Range of central Oregon, United States. Named Mount Bachelor because it stands apart from the nearby Three Sisters , [ 4 ] it lies in the eastern segment of the central portion of the High Cascades, the ...
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An eruption from South Sister would pose a threat to nearby life, as the proximal danger zone extends 1.2 to 6.2 mi (2 to 10 km) from the volcano's summits. [69] During an eruption, tephra could accumulate to 1 to 2 in (25 to 51 millimetres) in the city of Bend, and mudflows and pyroclastic flows could run down the sides of the mountain ...
More than 400 earthquakes have been detected beneath Washington's Mount St. Helens in recent months, though there are no signs of an imminent eruption, according to the U.S. Geological Survey.