A Cascade Range volcano is one that is part of a series of mountains in western North America that includes an arc of volcanoes. The Cascade Range extends from British Columbia through Washington and Oregon to northern California.Know More
According to the United States Geological Survey, the Cascade Range volcanoes include the following:
Washington: Mount Adams, Mount Baker, Glacier Peak, Mount Rainier, and Mount St. Helens
Oregon: Mount Bailey, Belknap Shield Volcano, Crater Lake (Mount Mazama), Mount Hood, Mount Jefferson, Mount McLoughlin, Newberry Caldera, Mount Thielsen, Three Sisters; and California: Lassen Peak, Mount Shasta.
Mount Mazuma is the name given to the volcano that erupted about 8,000 years ago and subsequently collapsed to form Crater Lake.
A well-known Cascade Range volcano, Mount St. Helens famously erupted in May 1980 after an earthquake measuring 5.1 on the Richter scale shook its foundation. The earthquake triggered a collapse of the volcano's north face, and the subsequent avalanche of stone triggered the pressurized gases within the volcano to explode and send the falling debris into a wind that leveled 150 square miles of surrounding forest. The eruption lasted nine hours, although the initial explosions altered the volcano itself and the surrounding landscape instantaneously. The volcano continued to erupt periodically until 1986.Learn more about Volcanoes
A volcano erupts through the build-up and release of pressure, whether that pressure is of its underlying magma, water or both. This release can be explosive, as it was in the famous eruption of Mt. Vesuvius that destroyed Pompeii, or it can be slow and effusive, as it is in the ongoing formation of the Hawaiian islands.Full Answer >
An inactive volcano is one that could erupt but has not erupted for more than 10,000 years. Inactive volcanoes are also called dormant or sleeping volcanoes.Full Answer >
An extinct volcano is one that has not erupted in at least 10,000 years and is not expected to erupt in the future, according to Oregon State University. There can be confusion between dormant and extinct volcanoes, but the difference between the two is that a dormant volcano may erupt even if it is in the distant future.Full Answer >
A quiet volcano is considered dormant. Dormant volcanoes are volcanoes that have not actively erupted in the past 10,000 years, but still have the potential to erupt at some point.Full Answer >