Some worrisome news from Greg Laden’s Science blog, also in the running for Best Science Blog
Note: Image below was not part of the original story
This images indicates Yellowstone earthquake from the past week. One of the most intense siesmic "swarms" in the national park's history has been shaking the north end of Yellowstone Lake. Since Dec. 26, 900 quakes, 111 measuring magnitude 2.0 to 3.9, have been recorded. Image by the U.S. Geological Survey.
Seismic Activity at Yellowstone by Greg Laden
You have already heard that there has been increased seismic activity at Yellowstone National Park over the last few days. Since December 26th, there have been several earthquakes a day, some jut over 3.0 magnitude, in the vicinity of the north side of Yellowstone’s lake. This is a seismically active region, but the level of earthquake activity being seen now is much greater than seen in perhaps decades (though the data are still not sufficiently analyzed to make positive comparisons yet).Volcano experts have absolutely no clue as to what this means. A major reason for virtually total uncertainty is that Yellowstone sits on top of a very large caldera of the type that is formed by a so-called “super volcano” and the last super volcano to erupt was a few years (like, 70 or so thousand years) before any seismic or other geological monitoring station were set up anywhere. Indeed, the first really serious data collection at Yellowstone began just over 30 years ago. Read the rest of this entry »
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