M2.8 earthquake 14 km WNW of La Grande, Oregon
A magnitude 2.8 earthquake struck 14 km WNW of La Grande, Oregon on Thu, May 22, 1975, 1:18 PM PDT (20:18 UTC), 25 km (15 mi) below the surface.
A larger quake followed: M3.2 12 km E of Milton-Freewater, Oregon. This one was a foreshock.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 2.8 (md), micro
- Local time
- UTC
- 1975-05-22 20:18:51 UTC
- Depth
- 24.9 km (15.4 mi), shallow
- Epicenter
- 45.379° N, 118.259° W
- Region
- Oregon
- 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.
- Location uncertainty
- About 5.2 km horizontally, 1.5 km in depth
- Magnitude uncertainty
- ±0.16
- Depth from
- From location
- Station coverage gap
- 328°, poorly surrounded by stations
- Stations used
- 7
Nearest places
Distance and direction from each place to the epicenter, with its forecast.
Nearby
Within 100 km, magnitude 1.5 and up: 2 in the 60 days after this one and 2 in the 30 days before it.
After
- 2.14 km ESE of Waitsburg, Washington · 18745 days ago · 17 km deep · 99 km away
- 3.212 km E of Milton-Freewater, Oregon · 18705 days ago · 8 km deep · 64 km away
Before
Earthquakes todayOregon earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event uw10862613. Read Tue, Sep 22, 2026, 9:38 PM UTC.