The 11 most dangerous volcanoes in California, ranked
U.S. Geological Survey via Getty Images
In October, the US Geological Survey released a new report detailing the relative threats posed by volcanoes in the United States. It was the first updated threat assessment since 2005, and officials will use the data to prioritize volcanoes for research and monitoring.This year's report includes new entries on potentially active volcanoes and updated scores for previously listed volcanoes. The 161 volcanoes are separated into five categories: very high, high, moderate, low, and very low. Threat scores were determined based on 24 factors, including how often a volcano erupts, how powerful eruptions are, how many people live nearby, and how many people have been killed or evacuated due to a past volcanic eruption.
According to the report, the US is one of the most volcanically active nations in the world, with more than 10% of all active and potentially active volcanoes in the country. Of the 18 volcanoes posing a very high threat, three are located in California. The state also has four volcanoes on the high threat list and another four on the moderate threat list.Take a look at California's most dangerous volcanoes.
99 — Ubehebe Crater, located in the northern half of Death Valley, is listed as a moderate threat.
90 — Mammoth Mountain is a cluster of lava domes posing a moderate threat.
72 — Coso volcanic field, located in the northern part of the Mojave Desert, also poses a moderate threat.
69 — The Mono Lake volcanic field, a moderate threat, includes two volcanic islands in a lake and a one volcano on the northwest shore.
56 — The Salton Buttes, five lava domes in the Imperial Valley of southern California, are a high threat.
45 — Medicine Lake, located in northeastern California, is a high threat as well.
33 — Clear Lake volcanic field, a high threat, is located in the state's northern Coast Ranges.
24 — Mono-Inyo Craters, a system of craters and domes such as Obsidian Dome (show below), is a high threat.
18 — Long Valley Caldera, which is adjacent to Mammoth Mountain in eastern California, was labeled as a very high threat.
11 — Lassen volcanic center, another very high threat, is located in Lassen Volcanic National Park.
5 — Mount Shasta, the most dangerous volcano in California, is located in the northernmost part of the state.
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