Three Sisters Volcanoes

The ground near one of the long-dormant Three Sisters volcanoes in Oregon’s Cascade Mountains has risen approximately 10 centimeters since 1996, meaning that underground magma is slowly flowing into the area.

The ground near one of the long-dormant Three Sisters volcanoes in the Cascade Mountains of west-central Oregon has risen approximately 10 centimeters in a 10-by-20-km parcel since 1996, meaning that magma or underground lava is slowly flowing into the area, according to a research team from the U.S. Geological Survey. The Three Sisters area?which contains five volcanoes?is only about 170 miles from Mount St. Helens, which erupted in 1980. Both are part of the Cascades Range, a line of 27 volcanoes stretching from British Columbia in Canada to northern California. This perspective view was created by draping a simulated natural color ASTER image over digital topography from the U.S. Geological Survey National Elevation Dataset.

Metadata

  • Sensor

    Terra/ASTER

  • Start Date

    2002-04-02

  • Event Start Date

    2002-04-02

  • NH Image ID

    2646

  • NH Event ID

    2628

  • NH Posting Date

    2002-04-10