Scientists can't say yet whether the swarm of earthquakes near Mt. Edgecumbe are related to volcanic activity — but it could represent a chance to learn more about the typically quiet volcano.
Baranof island’s Mount Edgecumbe volcanic cone rises 3,200 feet from the ocean near Sitka.
Mt. Edgecumbe is just a few miles from the Queen Charlotte Fault, where the North American Plate and the Pacific Plate are slipping in opposite directions at the rate of about two inches per year. So there’s always a lot of ordinary, background tectonic activity in the area.
Schneider says the April 11 swarm has tapered off a bit, which is a good thing. But that doesn’t mean the event is over. He says that in the medical world, they call it watchful waiting. “I had been talking to seismologists there who assured me that the earthquakes were very small,” she said, “which is true, but it’s unusual for them to be happening beneath Mt. Edgecumbe in the pattern that they’re seeing now.”
Another possibility is more appealing to fans of eruptions, and it doesn’t necessarily mean disaster.
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