Quote:
Originally posted by PornoDoggy@Dec 27 2004, 01:31 PM
The 1906 San Francisco quake was a 7.8; they estimate that one that happened in the midwest (near beautiful downtown New Madrid, Missouri) was about 8.0.
The New Madrid quake made the Mississippi River flow backwards for about three days.
Glad to hear that Timon is okay.
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From what I understand, an 8.9 would be substantially stronger than an 8.0:
Quote:
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The Richter scale is logarithmic, that is an increase of 1 magnitude unit represents a factor of ten times in amplitude. The seismic waves of a magnitude 6 earthquake are 10 times greater in amplitude than those of a magnitude 5 earthquake. However, in terms of energy release, a magnitude 6 earthquake is about 31 times greater than a magnitude 5.
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