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Archive Home > 2001 > May > 09 > Geologists detect bulge near South Sister

Geologists detect bulge near South Sister

By Julie Johnson / The Bulletin
May 9, 2001

Geologists have detected a swelling of the earth's crust near the South Sister, a geological development that could mean molten rock is moving under the mountain.

While such activity can occur before a volcanic eruption, the U.S. Geological Survey (USGS) said an eruption is unlikely without....

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