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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 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.
The eruption began at 14:50 local time, ejecting a cloud of volcanic ash 40,000 feet (12,000 m) into the air. [19] The collapse of the unstable lava dome due to heavy rainfall has been suggested as a proximate cause. Three smaller eruptions followed within a 24-hour period after the large initial eruption. [17] 5 December
A look back to April 2010 when the eruption of the Eyjafjallajokull volcano that led to an enormous ash cloud which halted international air travel for over a week Iceland's volcano: a timeline of ...
Scientists in Iceland say there is an increasing likelihood that a volcano, which has erupted several times since the end of 2023, will spring to life once again as magma continues to build up ...
The most destructive volcanic eruption in United States history happened less than half a century ago in Washington state. On May 18, 1980, the north side of Mount St. Helens, in southwestern ...
After successfully using seismic activity to predict the 1980 Mt. St. Helens eruption, monitoring was expanded to other Cascade Mountains volcanoes. The PNSN, in conjunction with the Cascades Volcano Observatory of the USGS, now monitors seismicity at all the Cascade volcanoes in Washington and Oregon.
While swarms of earthquakes occurred in the late 1980s and early 1990s, none directly led to volcanic eruptions. In 1980, 57 people died when Mount St. Helens erupted, an event that permanently ...