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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 Crest Montane Forest ecoregion consists of an undulating plateau punctuated by volcanic buttes and cones that reach a maximum elevation of about 6,500 feet (2,000 m). Volcanism in the Pliocene epoch overtopped the existing Miocene volcanics of the Western Cascades Montane Highlands.
There are other volcanoes in the northern Cascades region that have not been assessed one of these risk levels which warrant monitoring. Volcanoes that have not erupted during the Holocene period were not included. USGS has noted, though less probable, that it is still possible for volcanoes to erupt on longer intervals than mentioned. [6]
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 ...
The volcano has a volume of 6.0 cubic miles (25 km 3). [8] Mount Bachelor stands 3 miles (4.8 km) southeast of the Tumalo Mountain volcano and 18 miles (29 km) to the southwest of the city of Bend, [2] in the Deschutes National Forest. [9] Weather varies greatly in the area due to the rain shadow caused by the Cascade Range. Air from the ...
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The Mount Meager massif is a group of volcanic peaks in the Pacific Ranges of the Coast Mountains in southwestern British Columbia, Canada.Part of the Cascade Volcanic Arc of western North America, it is located 150 km (93 mi) north of Vancouver at the northern end of the Pemberton Valley and reaches a maximum elevation of 2,680 m (8,790 ft).