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Earth Science - Volcanoes: Hot Topics

How many active volcanoes are on Earth? How many in the U.S.?

"There are about 1,500 potentially active volcanoes worldwide, aside from the continuous belts of volcanoes on the ocean floor ... There are 169 potentially active volcanoes in the United States.' --

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Current Alerts for U.S. Volcanoes

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Smithsonian / USGS Weekly Volcanic Activity Report

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