New Madrid Catalog Help

This is a catalog of instrumental locations for earthquakes in the New Madrid Seismic Zone and surrounding regions, 1974 to present. Because the network has evolved over the years, there is no guarantee of consistency in detection threshold, magnitude determination or region covered. The data in this catalog come from numerous sources:

Output from the catalog search should have the following format:

92/12/27 10:12:58.76 37.501 -89.616 10 3.2 TEIC catalog event
93/ 1/ 3 21:14:54.14 35.194 -90.244 17 2.7 C WEST MEMPHIS, AR
95/ 4/27 0:42:35.00 36.690 -89.480 5 2.8 C HENDERSON MOUND, MO
95/ 5/27 19:51:10.00 36.170 -89.430 6 3.0 C MISTON, TN Felt

DATE: Date of earthquake (YY/MM/DD)
O.T.: Origin Time of earthquake (UTC)
LAT: Latitude
LON: Longitude
DEP: Depth (km)
MAG: Magnitude
COMMENTS: Additional comments, including felt information or independent magnitude determinations. Events from 1995 on include event quality (A=good, D=poor) and only report origin times to the nearest second even though accuracy may be known to a few tens of milliseconds. Epicentral accuracy varies throughout the catalog but in no case is better than a few tenths of a kilometer (0.01 degrees latitude is about 1.11 km or 0.69 miles).