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The most voluminous of the Cascade volcanoes, northern California's Mount Shasta is a massive compound stratovolcano composed of at least four main edifices constructed over a period of at least 590,000 years. An older edifice was destroyed by a large debris avalanche which filled the Shasta River valley to the NW. The Hotlum cone, forming the present summit, the Shastina lava dome complex ...
May 20, 2018 · Mt. Shasta is an active volcano that has erupted at least once per 800 years for the past 10,000 years, with an increased eruption frequency of about once per 250 years over the past 750 years. The region around Mt. Shasta is susceptible to lava and pyroclastic flows, lahars (mudflows), avalanches, and earthquakes. Lahars pose a significant ...
Aug 20, 2019 · So on August 6, Mount Shasta’s volcanic history became a little shorter when the 1786 eruption was officially struck from the record. The volcanic housecleaning is part of a larger effort led by ...
Geology and History of Mount Shasta. Mount Shasta is located in the Cascade Range in northern California about 65 km (40 mi) south of the Oregon-California border. One of the largest and highest (14,162 ft) of the Cascade volcanoes, the compound stratovolcano is located near the southern end of the range that terminates near Lassen Peak.
Mount Shasta, a 14,179-foot (4,322-meter) stratovolcano, is the second-highest peak in the Cascade Range and the fifth highest peak in California.It is a member in the Cascade Volcanic Arc, located in Siskiyou County, and has an estimated volume of 108 cubic miles (450 cubic kilometers), making it the most voluminous stratovolcano of the Cascades.
Nov 5, 2023 · Holocene eruptions. Eruptions during the last 10,000 years produced lava flows and domes on and around the flanks of Mount Shasta, and pyroclastic flows from summit and flank vents extended as far as 20 km (12.4 mi) from the summit. Most of these eruptions also produced large mudflows, many of which reached more than several tens of kilometers ...
Mount Shasta earthquake series poses no immediate hazard. Since February 19, 2015 an ongoing series of small earthquakes has been occurring approximately 5 miles southeast of the summit of Mount Shasta, near... Read Article. Mount Shasta debris flow not linked to volcanic activity. September 25, 2014.
