How many potentially active volcanoes are there in the United States?
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The correct answer is 169. The United States is home to 169 active volcanoes, many of which could erupt at any time. The USGS monitors these volcanoes and issues warnings and alerts, including imminent or ongoing eruptions, ash fall forecasts, and when eruptions have ended. Check out USGS resources for information and to receive alerts, whether you live in close proximity to a volcano or plan to travel to a nearby area.
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