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Pisgah Crater, or Pisgah Volcano, is a young volcanic cinder cone rising above a lava plain in the Mojave Desert, between Barstow and Needles, California in San Bernardino County, California. The volcanic peak is around 2.5 miles (4.0 km) south of historic U.S. Route 66 - National Old Trails Highway and of Interstate 40 , and west of the town ...
Some of these volcanic rocks bear traces of hydrothermal alteration. In some places the layers of volcanic rocks are as thick as 100 m (330 ft). [27] There may be other volcanoes buried in the sediment pile; [28] at least four separate aeromagnetic anomalies have been found at the Salton Buttes, and these may be signs of buried volcanoes. [11]
The Long Valley Caldera, which includes Mammoth Lakes area, has been having seismic activity, which can precede a volcanic eruption. Scientists say not to worry. One of California's riskiest ...
About 3 million years ago, the southern limit of active volcanoes in the Cascades corresponded to the Yana Volcanic Center 19 mi (30 km) to the south of Lassen Peak, but currently the southern edge of the Lassen Volcanic National Park now marks the same border, indicating that the Cascade Arc's southern end migrates at a rate of 0.4 to 1 in (1. ...
The volcano is classified as a "Moderate Threat" volcano in the USGS volcanic threat assessment. [ 66 ] [ 67 ] An incomplete [ 68 ] circular 10-kilometre-wide (6.2 mi) volcano hazard zone has been defined for the Ubehebe Craters, which reaches Scotty's Castle , within which pyroclastic surges and steam blasts could be expected in case of ...
The most recent eruption was approximately 10,000 years ago. [4] The crater is 944 ft (288 m) above sea level, about 250 ft (76 m) above the surrounding basalt lava plains. The scenic and solitary Amboy Crater was a popular sight and stop for travelers on U.S. Route 66 in California before the opening of Interstate 40 in 1973.
In October 2006, the United States Geological Survey (USGS) adopted a nationwide alert system for characterizing the level of unrest and eruptive activity at volcanoes. The system is now used by the Alaska Volcano Observatory, the California Volcano Observatory (California and Nevada), the Cascades Volcano Observatory (Washington, Oregon and Idaho), the Hawaiian Volcano Observatory and the ...
Schonchin Butte is a cinder cone on the northern flank of Medicine Lake Volcano in the Cascade Range in northern California. Frothy lava, cooled in the air, created the large cinder cones throughout Lava Beds National Monument. It is named for Old Schonchin, a chief of the Modoc people during the late nineteenth century. Erupting more than ...