reply to post by Lil Drummerboy
The 4.7 was the biggest so far, I believe. It's significant.
BTW people, another 3.2 just now:
Magnitude 3.2 - ARKANSAS
2011 February 28 13:06:46 UTC
* Details
* Maps
Earthquake Details
* This event has been reviewed by a seismologist.
Magnitude 3.2
Date-Time
* Monday, February 28, 2011 at 13:06:46 UTC
* Monday, February 28, 2011 at 07:06:46 AM at epicenter
Location 35.285°N, 92.394°W
Depth 5 km (3.1 miles) set by location program
Region ARKANSAS
Distances
* 4 km (3 miles) SE (142°) from Twin Groves, AR
* 6 km (4 miles) N (356°) from Greenbrier, AR
* 7 km (4 miles) SW (231°) from Guy, AR
* 61 km (38 miles) N (355°) from Little Rock, AR
* 418 km (260 miles) SSW (208°) from St. Louis, MO
Location Uncertainty horizontal +/- 8 km (5.0 miles); depth fixed by location program
Parameters NST= 35, Nph= 56, Dmin=10 km, Rmss=1.42 sec, Gp= 47°,
M-type="Nuttli" surface wave magnitude (mbLg), Version=6
Source
* U.S. Geological Survey, National Earthquake Information Center:
World Data Center for Seismology, Denver
Event ID usb0001lx6