Duplicate | January 03, 2009 | 7 comments

More than 400 Quakes in Eight Days

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Kepano
A few little earthquakes here or there is just a part of everyday life when you live on top of the largest supervolcano in North America.

But in the last eight days, there have been more than 400 earthquakes at Yellowstone National Park — where the volcanic system powers the geysers, mudpots and steam vents.

Hank Heasler, a National Park Service geologist at Yellowstone, says the constant quakes haven't caused any damage, but they can be a nuisance to rangers who live at the park.

"They have commented to me that they would appreciate it if the earthquakes would stop so they could get a good night's sleep," he says.

When a bunch of earthquakes occur in a concentrated area in a short amount of time, geologists call it a "swarm." They're not unheard of at Yellowstone, but rarely have the earthquakes reached the magnitude and frequency of the past week.
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