M3.0 earthquake 15 km ESE of Irwin, Idaho
A magnitude 3.0 earthquake struck 15 km ESE of Irwin, Idaho on Wed, Mar 25, 1981, 5:21 PM MST (00:21 UTC), 5 km (3 mi) below the surface.
A larger quake followed: M3.7 11 km E of South Park, Wyoming. This one was a foreshock.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 3.0 (ml), minor
- Local time
- UTC
- 1981-03-26 00:21:28 UTC
- Depth
- 5.0 km (3.1 mi), shallow
- Epicenter
- 43.364° N, 111.114° W
- Region
- Wyoming
- 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
- OPERATOR_ASSIGNED
Nearest places
Distance and direction from each place to the epicenter, with its forecast.
Nearby
Within 100 km, magnitude 1.5 and up: 3 in the 60 days after this one and 0 in the 30 days before it.
After
Earthquakes todayWyoming earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event usp0001cw1. Read Wed, Sep 23, 2026, 3:31 AM UTC.