Volcanoes that geologists believe may be extinct are located in such diverse places as Japan, the northern Pacific Ocean, Germany, Peru, the Philippine Sea, Meares Island, the United States, the Netherlands, Australia, Tanzania, France and Russia. Extinct volcanoes are not concentrated in any specific locations.Know More
Geologists define an extinct volcano as one that has not erupted in at least 10,000 years and no longer maintains access to an underground supply of magma to feed its eruptions. For example, the volcanoes that geologists believe created the Hawaiian Islands moved with the tectonic plates that took them away from their supply of magma and left them extinct. As the extinct volcanoes moved west, the magma supply gave rise to new volcanoes to carry the magma from inside the Earth to the surface.
Some volcanoes that technically met the definition for extinction status at one point have later erupted, including Soufriere Hills in Montserrat, which erupted in 1995, and Fourpeaked Mountain in Alaska, which erupted in 2004. Most famously, the presumed extinct Mount Vesuvius erupted in 79 A.D., when it destroyed the Roman city of Pompeii. Similarly, while Yellowstone Caldera in Yellowstone National Park last erupted at least 640,000 years ago, geologists believe that it is dormant rather than extinct.Learn more about Volcanoes
It is hard to put an exact figure on the number of extinct volcanoes in the world; according to Oregon State University, the expectation that a volcano will never erupt again is no guarantee that this is actually the case. When it comes to predicting volcanic behavior, there is a lot of potential room for human error.Full Answer >
Every volcano has its own eruptive history, and most can be classified into three main types that are based on the volcano's general form and eruptive pattern. Categorizing a volcano as active, dormant or extinct is one way of acknowledging its eruptive history, though these categories are necessarily inexact and subjective.Full Answer >
Famous composite volcanoes include Mount Fuji in Japan, Mount Cotopaxi in Ecuador, Mount Shasta and Mount Lassen in California, Mount Hood in Oregon, Mount St. Helens and Mount Rainier in Washington, Mount Pinatubo in the Philippines, and Mount Etna in Italy. Many of these volcanoes are located around the Pacific Rim.Full Answer >
Some of the most famous volcanoes are Mount Vesuvius in Italy, Mount Fuji in Japan, Mount Saint Helens in the state of Washington, and Kilauea in Hawaii. Some have been quiet for centuries, but others have erupted in 2015.Full Answer >