Light Quake Felt in North Huntsville

Earthquake Details for Illinois Quake

Magnitude
5.4
Date-Time
Friday, April 18, 2008 at 09:36:57 UTC
Friday, April 18, 2008 at 04:36:57 AM at epicenter
Time of Earthquake in other Time Zones
Location
38.481°N, 87.826°W
Depth
5 km (3.1 miles) set by location program
Region
ILLINOIS
Distances
9 km (6 miles) NW (326°) from Mount Carmel, IL
11 km (7 miles) WSW (242°) from Allendale, IL
13 km (8 miles) NE (34°) from Bellmont, IL
61 km (38 miles) NNW (337°) from Evansville, IN
211 km (131 miles) E (94°) from St. Louis, MO
Location Uncertainty
horizontal +/- 3.7 km (2.3 miles); depth fixed by location program
Parameters
NST=101, Nph=101, Dmin=36.8 km, Rmss=0.87 sec, Gp= 61°,M-type=moment magnitude (Mw), Version=9

This event has been reviewed by a seismologist.

Earthquake Magnitude Scale
2.5 to 5.4
Often felt, but only causes minor damage.
Earthquake Magnitude Classes

Earthquakes are also classified in categories ranging from minor to great, depending on their magnitude.
Class

Class/Magnitude
Great: 8 or more
Major: 7 - 7.9
Strong: 6 - 6.9
Moderate: 5 - 5.9
Light: 4 - 4.9
Minor: 3 -3.9