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Originally posted by loam
reply to post by Robin Marks
I immediately thought of this thread: Map of the strange sound phenomenon heard around the world
But none on that map seem to implicate the location of the recent quakes.edit on 23-8-2011 by loam because: (no reason given)
Magnitude 4.2
Date-Time Wednesday, August 24, 2011 at 00:04:36 UTC
Tuesday, August 23, 2011 at 08:04:36 PM at epicenter
Location 37.917°N, 77.891°W
Depth 7.8 km (4.8 miles) (poorly constrained)
Region VIRGINIA
Distances 52 km (32 miles) ESE of Charlottesville, Virginia
54 km (33 miles) SW of Fredericksburg, Virginia
55 km (34 miles) NW of RICHMOND, Virginia
81 km (50 miles) NNE of Farmville, Virginia
Location Uncertainty horizontal +/- 10.1 km (6.3 miles); depth +/- 9.4 km (5.8 miles)
Parameters NST= 82, Nph= 96, Dmin=55.7 km, Rmss=1.24 sec, Gp=126°,
M-type="Nuttli" surface wave magnitude (mbLg), Version=4
Source Magnitude: USGS NEIC (WDCS-D)
Location: USGS NEIC (WDCS-D)
Event ID usc0005iu6
Originally posted by jtma508
The CO quake --- although not huge by fault-area standards --- was unique becuase it was so large based on history. Biggest in 40yrs. How about the VA quake? How does that one stack-up historically?
Originally posted by sdcigarpig
It is not the earthquakes in areas with faults or volcanoes that should be payed attention to, as there will always be earthquakes.
Rather it is the ones that are in what would be considered geologically stable areas that bear for us to pay attention to, as they are out of the ordinary and should be of concern. The 2 that the OP mentioned, the one in Colorado/New Mexico, and the one in Virgina, those are something that everyone should wake up and pay attention to, as there is no faults in that area, infact looking at the geological maps they do not make sense as to why they occured.