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The Cascade volcanoes have had more than 100 eruptions over the past few thousand years, many of them explosive eruptions. [21] However, certain Cascade volcanoes can be dormant for hundreds or thousands of years between eruptions, and therefore the great risk caused by volcanic activity in the regions is not always readily apparent.
This is a list of Cascade volcanoes, i.e. volcanoes formed as a result of subduction along the Cascadia subduction zone in the Pacific Northwest of North America. The volcanoes are listed from north to south, by province or state: British Columbia , Washington , Oregon , and California .
The David A. Johnston Cascades Volcano Observatory (CVO) is a volcano observatory in the US that monitors volcanoes in the northern Cascade Range. It was established in the summer of 1980, after the eruption of Mount St. Helens . [ 2 ]
Decreasing earthquake activity could be a sign magma has reached very high up earth’s crust, Met Office says
The only dormant sites are found in the oldest part of Iceland’s landmass, the Westfjords, which was formed around 16 million years ago. About 32 active volcanic systems can be found under the ...
Campi Flegrei, a large dormant volcano near Naples, has a history of eruptions, and the last one was in 1538. ... “That (1538) was a very small eruption, that, if it would happen today, in a ...
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 ...
Thousands of residents evacuated town of Grindavik over weekend after series of earthquakes as volcano eruption still possible ... There have been 1,200 tremors between midnight and 2pm today on ...