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The Cascade Volcanoes (also known as the Cascade Volcanic Arc or the Cascade Arc) are a number of volcanoes in a volcanic arc in western North America, extending from southwestern British Columbia through Washington and Oregon to Northern California, a distance of well over 700 miles (1,100 km).
USGS Cascades Volcano scientists listen to and watch volcanoes using a variety of equipment. Seismometers detect earthquakes, GPS receivers detect ground motion, "sniffers" detect volcanic gas, and staff innovate new equipment to solve unique activity detection needs. Learn More.
Seven Cascade volcanoes have erupted since the beginning of the eighteenth century. Some of those eruptions would have caused considerable property damage, economic disruption, and loss of life if they had occurred today without warning: Mount Baker– 1843, steam blast, ash fall, debris avalanche.
Mar 17, 2023 · The Cascade volcanoes are responsible for all of the volcanic eruptions in the conterminous United States in the past 200 years. Check out this guide for a comprehensive overview on the Cascade Mountain Range, including information on its most notable mountains and best hikes.
Dec 6, 2023 · In Cascade Range vicinity, the number of people at immediate risk during eruptions is greater than at any other volcanic area within the United States. The 2010 census notes that more than 10 million people live in Washington and Oregon alone, and populations are increasing in areas at risk for volcanic hazards.
May 4, 2024 · Cascade Range, segment of the Pacific mountain system of western North America. The Cascades extend northward for more than 700 miles (1,100 km) from Lassen Peak, in northern California, U.S., through Oregon and Washington to the Fraser River in southern British Columbia, Canada.
May 2, 2024 · The Cascade Range is one of the most accessible spans of active volcanism on Earth. Running from southern British Columbia to northern California, many of the volcanoes are located within a day's drive from major cities like Seattle, Portland, Sacramento and San Francisco.
