M1.8 earthquake 1 km N of Valmeyer, Illinois
A magnitude 1.8 earthquake struck 1 km N of Valmeyer, Illinois on Mon, Oct 18, 1976, 4:12 AM CDT (09:12 UTC), 5 km (3 mi) below the surface.
A larger quake followed: M4.2 12 km SE of Sullivan, Missouri. This one was a foreshock.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 1.8 (Mlg), micro
- Magnitude from
- NM
- Local time
- UTC
- 1976-10-18 09:12:14 UTC
- Depth
- 5.0 km (3.1 mi), shallow
- Epicenter
- 38.320° N, 90.280° W
- Region
- Illinois
- Tsunami flag
- No
- Status
- Reviewed by a seismologist
Did you feel it?
No one has reported feeling this quake to the USGS.
How well it is located
Reviewed by a seismologist.
- Depth from
- From location
Nearest places
Distance and direction from each place to the epicenter, with its forecast.
Nearby
Within 100 km, magnitude 1.5 and up: 4 in the 60 days after this one and 0 in the 30 days before it.
After
Earthquakes todayIllinois earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event nm600482. Read Mon, Oct 5, 2026, 6:44 AM UTC.