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 areawhich contains five volcanoesis 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.
Image courtesy of NASA/GSFC/MITI/ERSDAC/JAROS, and U.S./Japan ASTER Science Team
The Cascade Range is an arc of volcanoes that extends from southwestern British Columbia to northern California. One of the six major composite volcanoes (formed by alternating layers of extruded lava and compacted ash) is Mount Baker in northern Washington.
This photograph of snow-covered volcanoes on Russia’s Kamchatka Peninsula illustrates one of the unique attributes of the International Space Station—the ability to view landscapes at an angle, rather than the straight down view typical of many satellite-based sensors.