The United States has more than 65 active or potentially active volcanoes, more than those of all other countries except Indonesia and Japan. During the twentieth century, volcanic eruptions in Alaska ...

Pre-eruptive volatiles and magma storage depth for the 2018 eruption at Mount Veniaminof, Alaska Pre-eruptive volatiles and magma storage depth for the 2018 eruption at Mount Veniaminof, Alaska ...

Experts in volcanology observing the Pacific Northwest have raised fresh alerts regarding various volcanic systems within the Cascade Range that are exhibiting increased seismic and thermal activity.

Add Yahoo as a preferred source to see more of our stories on Google. One of two main craters on Alaska's Mount Spurr, shown in 1991. Earthquake activity suggests the volcano is close to erupting ...

6 A Vision for the USGS Volcano Hazards Program The committee hopes that if a major eruption were to occur in the United States in the year 2010, the USGS VHP would be prepared to respond in a manner ...