Maybe this is what is causing some of the odd noises:
Seattle Times
By Sandi Doughton
Seattle Times science reporter
In Native American lore, the volcanoes of the Cascade Mountains chatted with each other like girlfriends.
Scientists, however, have long held that Mounts Rainier, Baker and their snow-capped sisters don't really communicate in a geologic sense.
Now, a group of researchers say they've found evidence that some of the explosive peaks are connected via a massive body of partially-molten rock
that stretches between Mount St. Helens, Mount Adams and Mount Rainier.
If they're right, the magma chamber would be one of the biggest ever discovered, on a par with the pool of molten rock that underlies the Yellowstone
basin. But the presence of a large magma chamber under the Cascades wouldn't mean the region is sitting atop a "supervolcano" like the one that
blew Wyoming sky high in the distant past.
"It doesn't suggest there's a giant volcano waiting to pop," said hydrologist Matt Burgess, co-author of the study published online Sunday by the
journal Nature Geoscience. "The significance is that it's given us a kind of a window on what's going on at depth."
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