The US Geological Survey (USGS) has just installed some of the first sensors of their kind on the east side of the mountain.
A debate is stirring in Southwest Washington over how to manage ongoing impacts from the 1980 eruption of Mount St. Helens.
Mount Rainier’s cousin Mount St. Helens, farther south in the Cascade Range, triggered a devastating lahar when it erupted four decades ago, although it did not reach any densely populated areas.
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