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A Sight "Fearfully Grand"—Eruptions of Lassen Peak, California, 1914 to 1917: Fact Sheet 2014–3119. National Park Service, Lassen Association, and the United States Forest Service. Foxworthy, B. L.; Hill, M. (1982). Volcanic Eruptions of 1980 at Mount St. Helens: The First 100 Days (U.S. Geological Survey Professional Paper, 1249).
The last major eruptions of Lassen Peak occurred in April through June 1917, when a new crater was created at the summit of the mountain. Less explosive activity continued through 1921. [1] [24] The Smithsonian considers the eruption of Mount Lassen to have ended on June 29, 1917. [36]
The 29 mi (47 km) Main Park Road was constructed between 1925 and 1931, just 10 years after Lassen Peak erupted. Near Lassen Peak the road reaches 8,512 ft (2,594 m), making it the highest road in the Cascade Mountains. It is not unusual for 40 ft (12 m) of snow to accumulate on the road near Lake Helen and for patches of snow to last into July.
Highest point; Elevation: 6,896 ft (2,102 m) NGVD 29 [1] Coordinates: 1]: Geography; Location: Lassen and Shasta counties, California, U.S.: Parent range: Cascade Range: Topo map: USGS Prospect Peak: Geology; Mountain type: Extinct Cinder cone: Volcanic arc: Cascade Volcanic Arc: Last eruption: 1666: Climbing; Easiest route: Trail hike: Cinder Cone is a cinder cone volcano in Lassen Volcanic ...
In addition to the volcanic hazards that could possibly occur, one volcano did erupt in the 20th century in LVNP: (Lassen Peak). Lassen's eruptions (1914–21, though most activity occurred between 1914 and 1917) were very small compared to the 1980 eruption of Mount St. Helens.
Jim Erickson covered the 1980 eruption of Mount St. Helens for The News Tribune and published a book chronicling the 40th anniversary in 2020, offered by The History Press.
A year before Ishi's death, Mt. Lassen exploded. Mt. Lassen is officially recognized as Lassen Peak by the United States Board on Geographic Names. Before the eruption on May 22, 1915, the smoking volcano became a tourist draw. Today, within Lassen Volcanic National Park, the area surrounding the volcano is known as the Devastated Area.
The volcanoes with historical eruptions include: Mount Rainier, Glacier Peak, Mount Baker, Mount Hood, Lassen Peak, and Mount Shasta. Renewed volcanic activity in the Cascade Arc, such as the 1980 eruption of Mount St. Helens, has offered a great deal of evidence about the structure of the Cascade Arc. One effect of the 1980 eruption was a ...