Magnitude 4.2 - ILLINOIS

2004 June 28 06:10:51 UTC

Magnitude	4.2 (Light)
Date-Time	Monday, June 28, 2004 at 06:10:51 (UTC) = Coordinated Universal Time Monday, June 28, 2004 at 1:10:51 AM = local time at epicenter Time of Earthquake in other Time Zones
Location	41.443°N, 88.927°W
Depth	5 km (3.1 miles) set by location program
Region	ILLINOIS
Distances	13 km (8 miles) E (101°) from Troy Grove, IL 13 km (8 miles) NNE (32°) from North Utica, IL 13 km (8 miles) NNW (342°) from Naplate, IL 63 km (39 miles) SW (236°) from Aurora, IL 113 km (70 miles) WSW (247°) from Chicago, IL
Location Uncertainty	horizontal +/- 4.9 km (3.0 miles); depth fixed by location program
Parameters	Nst= 37, Nph= 37, Dmin=196.8 km, Rmss=0.97 sec, Gp= 72°, M-type=teleseismic moment magnitude (Mw), Version=9
Source	USGS NEIC (WDCS-D)
Event ID	uskgad

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Preliminary Earthquake Report
U.S. Geological Survey, National Earthquake Information Center
World Data Center for Seismology, Denver