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Eruption Update: Ontake, Sinabung, Holuhraun, Long Valley, Mount St. Helens

Explore the Mount St. Helens eruption and its long history of volcanic activity and prediction challenges.

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A view of Mount St. Helens, showing the crater carved by the 1980 eruption. September marked the 10th anniversary of the start of the most recent bout of eruptions at the Washington volcano. Photo by

Josh Sherrill / Flickr Some news from the volcano world: Japan The death toll from this weekend's eruption from Ontake has now reached 47 and the search for more victims continues. Most of the deaths appear to be due to head trauma from the rocks ejected during the explosion itself. The JMA released more information regarding the potential signs of an eruption and really, there were no signs that would suggest an event like this would happen. There was a small swarm of earthquakes a few weeks before the eruption, but swarms like that are common at many volcanoes and could be interpreted to mean any number of events (magma movement, fluid movement, gas movement). ...

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