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120 small quakes swarm Mount St. Helens; scientists turn to data for clues

Mount St Helens (Courtesy Don Jensen)

A recent swarm of more than 120 earthquakes near Mount St. Helens -- all below a magnitude 0.5 -- comes as a reminder to scientists and residents alike that while the volcano has been relatively "well-behaved" recently, another eruption is inevitable.

Our news partners at the Columbian recently got in touch with scientists who study, in part, the volcano and the land beneath it. To them, these quakes are a window into what's going on underground, and can be helpful for directing further research.

“Each of these little earthquakes is a clue and a reminder we are marching toward an eruption someday,” said Weston Thelen, a U.S. Geological Survey seismologist with the Cascades Volcano Observatory in Vancouver, as reported in the Columbian.

There's nothing particularly alarming about this series of earthquakes, though, and it doesn't help much to indicate when the next eruption will be. Read more about the recent swarm and what scientists have to say here.


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