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Magnitude 3.3
Date-Time Sunday, May 08, 2011 at 04:32:20 UTC
Saturday, May 07, 2011 at 10:32:20 PM at epicenter
Location 44.818°N, 110.992°W
Depth 6.6 km (4.1 miles)
Region YELLOWSTONE NATIONAL PARK, WYOMING
Distances 19 km (12 miles) NNE (28°) from West Yellowstone, MT
33 km (20 miles) SW (222°) from Gardiner, MT
45 km (28 miles) NE (38°) from Island Park, ID
439 km (273 miles) ENE (70°) from Boise, ID
458 km (284 miles) N (9°) from Salt Lake City, UT
Location Uncertainty horizontal +/- 0.5 km (0.3 miles); depth +/- 1.2 km (0.7 miles)
Parameters NST= 39, Nph= 39, Dmin=7 km, Rmss=0.36 sec, Gp= 36°,
M-type=local magnitude (ML), Version=1
Source University of Utah Seismograph Stations
Event ID uu00006911
He said the first super eruption at Yellowstone was 2,500 times bigger than the 1980 eruption of Mount St. Helens. Ash from that eruption fell over much of the American West and Midwest reaching all the way to the Gulf of Mexico. Herds died on the plains. And the ash that remained in the upper atmosphere circled the globe plunging it into a volcanic winter that probably lasted years.
Here's the short version of what would happen If such an eruption happened today: The explosion and pyroclastic flow (think a tsunami of superheated gas, rock and ash) would level the park and surrounding communities. A few inches of ash would fall on Salt Lake. Add a little rainfall with that ash and some roofs would collapse. No harvest would be possible in America's bread basket. And of course, there would be that volcanic winter lasting years.
The result: the magma plume below Yellowstone is even bigger than first thought. The plume looks like a tilted tornado that extends out under Idaho, Montana and Wyoming. It is made up of hot and partly molten rock surging up into the earth's crust from the mantle.
Originally posted by works4dhs
heard a commentator discuss near-future food shortages. I wonder; would action in the Yellowstone caldera impact food producing areas? I think it's mostly (beef) ranchland that part of the country, but Kansas and the farm belt aren't all that too far.