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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.
Colorado (3 volcanoes): Dotsero | McCoy | Willow Peak
Oregon (61 volcanoes): Bachelor | Bailey | Belknap | Big Bunchgrass | Black Butte | Black Crater | Blue Lake Crater | Boring Lava | Broken Top | Brown Mountain | Cappy Mountain | China Hat-East Butte | Cinnamon Butte | Cowhorn Mountain | Crater Lake | Cultus Mountain | Cupit Mary Mountain | Davis Lake | Defiance | Devils Garden | Diamond Craters | Diamond Peak | Fort Rock Volcanic Field | Four Craters | Four Craters Lava Field | Fuji Mountain | Goose Nest | Imagination Peak | Irish Mountain | Jackies Butte | Jefferson | Jordan Craters | Lava Butte | Lava Mountain | Lost Lake Butte | Maiden Peak | McLoughlin | Mount Hood | Mount Washington | Mountain Lakes | Newberry | North Sister | Olallie Butte | Pelican Butte | Quartz Mountain | Red Top Mountain | Saddle Butte | Sand Mountain | Scott Mountain | Silver Creek | South Sister | Sprague River Valley | Squaw Ridge | Taylor Butte | Thielsen | Three Fingered Jack | Three Sisters | Tumalo | Williamson Mountain | Wilson | Wuksi Butte-Twin Lakes
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There are more volcanoes in Canada and the USA than most people know, including many that are active, although there have been extremely few eruptions (but including the famous 1980 eruption of Mt. St. Helens) in the past 150 years. In the 20th century, there were only 2 eruptions: Lassen in 1915 and Mt St Helens in 1980, and since the turn of the century, only St. Helens has been active between 2004-2008.

Most volcanoes of Canda & USA are located along the west coast and related to the subduction of the Pacific plate under the continental North American tectonic plate.
The USGS in particular does a great job in monitoring, studying and publishing a great wealth of information about them.
Latest news
Wed, 11 May 2022, 18:39

Yellowstone volcano (United States): small earthquake

University of Utah Earthquake Hazards Program Website. Photo Credit: USGS.
The University of Utah Seismograph Stations reported that a light earthquake of magnitude 4.2 occurred at 07:32 AM on May 11, 2022 (MDT). ... Read all
Thu, 3 Feb 2022, 00:26

Three Sisters (United States) - Smithsonian / USGS Weekly Volcanic Activity Report for 26 January-1 February 2022 (NEW)

A special statement was issued by USGS on 31 January noting an increased rate of uplift at Three Sisters during the previous few years. An area 20 km in diameter, centered 5 km W of South Sister, inflated up to 2.2 cm between June 2020 and August 2021, based on analysis of satellite data. GPS data indicated that the uplift had continued to the present. ... Read all
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