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Scientists detect rejuvenated uplift near South Sister volcano.

Scientists detect rejuvenated uplift near South Sister volcano.

Using satellite imagery and sophisticated GPS instruments, Cascades Volcano Observatory geophysicists have detected a subtle increase in the rate of...

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Which U.S. volcanoes pose a threat?

Which U.S. volcanoes pose a threat?

USGS Volcanic Threat Assessment updates the 2005 rankings.

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Geologic maps lay the foundation for this virtual tour of western states volcanoes.

Geologic maps lay the foundation for this virtual tour of western states volcanoes.

Take a virtual geologic tour in the USGS Geonarrative, Volcanic Landscapes.

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