Volcanoes of Canada and United States (mainland) - Information

Volcanoes of Canada and USA (mainland)

All volcanoes in Canada and in the contiguous states of the USA are listed that have had volcanic activity within the past 10,000 years or are considered to be still active.

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Arizona (6 volcanoes)

California (47 volcanoes)

Canada (32 volcanoes)

Colorado (3 volcanoes)

Dotsero | McCoy | Willow Peak

Idaho (9 volcanoes)

Nevada (9 volcanoes)

New Mexico (13 volcanoes)

Oregon (61 volcanoes)

Utah (8 volcanoes)

Washington State (12 volcanoes)

Wyoming (2 volcanoes)

Leucite Hills | Yellowstone

Mount St. Helens volcano (Washington, USA): elevated seismic activity poses no threats so far

Digital elevation model of Mount St. Helens volcano and earthquake density during 1987-2004. Areas with a lot of earthquakes are in blue, while areas with fewer earthquakes are shown in oranges and browns. The earthquakes associated with the current episode are shown in orange (image: CVO)

The Cascades Volcano Observatory (CVO, USGS) reported that seismic activity at the volcano has been elevated over the past three months. ... Read all

Wed, 17 May 2023, 14:00

St. Helens volcano (Washington) - Smithsonian / USGS Weekly Volcanic Activity Report for 10 May-16 May 2023 (Continuing Activity)

USGS reported that at 2045 on 14 May a debris flow in Mount St. Helens'South Coldwater Creek destroyed a Highway SR 504 bridge, cutting off access and power to Johnston Ridge Observatory. While the loss of power interrupted a major telemetry hub, other stations remined operational and continued to provide data; the debris flow was recorded in seismic data from nearby stations. ... Read all

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