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Post by neohguy on Feb 11, 2011 8:24:42 GMT -5
I never heard of this: www.ohio.com/news/break_news/115884104.htmlPOSTED: 07:54 a.m. EST, Feb 11, 2011 -------------------------------------------------------------------------------- Information from the Dayton Daily News, www.daytondailynews.com. DAYTON, OHIO: Experts say shaking felt in western Ohio and neighboring Indiana was caused by a phenomenon known as "frost quakes." Darke County, Ohio, 911 director Brandon Redmond says reports of rumbling poured in between 5:30 a.m. and 7:30 a.m. on Thursday, though there were people saying they felt the earth moving over an eight-hour span. He says there were no reports of damage. Emergency management officials in Ohio and Indiana and the Ohio Department of Natural Resources helped make the determination that frost quakes were at work. The Dayton Daily News reports they occur when soil soaked with moisture goes through a quick freeze, causing an expansion and contraction that can be violent. Redmond says shaking in his own home prompted him to rush out of the shower Thursday morning. |
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DebMD (banned)
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Post by DebMD (banned) on Feb 11, 2011 8:30:09 GMT -5
A weather phenomenon....that has the snow and frost to prove it.
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Waffle
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Post by Waffle on Feb 11, 2011 8:42:17 GMT -5
TMI
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DebMD (banned)
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Post by DebMD (banned) on Feb 11, 2011 8:44:55 GMT -5
A cryoseism known as a frost quake may be caused by a sudden cracking action in frozen soil or rock saturated with water or ice. As water seeps down into the rock, it freezes and expands, putting stress on surrounding rock. This builds up until it is relieved explosively in a cryoseism.
Another form of cryoseism known as an ice quake, is a non-tectonic seismic event caused by sudden glacial movements, sometimes due to the formation of a thin veneer of liquid water under a glacier from surface melting. Usually, a glacier would stick to the rough bedrock, but the hydraulic pressure acts as a lubricant, allowing it to slide up to many metres at once. This type of cryoseism can last for tens of minutes.
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DebMD (banned)
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Post by DebMD (banned) on Feb 11, 2011 9:06:41 GMT -5
This off topic...and interesting.
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