M2.7 earthquake 4 km S of Cayuse, Oregon
A magnitude 2.7 earthquake struck 4 km S of Cayuse, Oregon on Fri, May 9, 1975, 1:52 PM PDT (20:52 UTC), 0 km (0 mi) below the surface.
A larger quake followed: M2.8 14 km NE of Richland, Washington. This one was a foreshock.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 2.7 (md), micro
- Local time
- UTC
- 1975-05-09 20:52:14 UTC
- Depth
- -0.4 km (-0.2 mi), shallow
- Epicenter
- 45.633° N, 118.556° 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 0.6 km horizontally, 0.7 km in depth
- Magnitude uncertainty
- ±0.23
- Depth from
- Operator assigned
- Station coverage gap
- 305°, poorly surrounded by stations
- Stations used
- 4
Nearest places
Distance and direction from each place to the epicenter, with its forecast.
Nearby
Within 100 km, magnitude 1.5 and up: 8 in the 60 days after this one and 1 in the 30 days before it.
After
- 2.814 km NE of Richland, Washington · 18751 days ago · 2 km deep · 97 km away
- 2.814 km WNW of La Grande, Oregon · 18751 days ago · 25 km deep · 37 km away
- 2.216 km SE of Prosser, Washington · 18748 days ago · 10 km deep · 97 km away
- 2.14 km ESE of Waitsburg, Washington · 18745 days ago · 17 km deep · 78 km away
- 3.11 km WSW of Pasco, Washington · 18727 days ago · 1 km deep · 80 km away
- 1.92 km W of Pasco, Washington · 18725 days ago · 3 km deep · 80 km away
- 2.10 km E of Pasco, Washington · 18725 days ago · 1 km deep · 79 km away
- 3.212 km E of Milton-Freewater, Oregon · 18705 days ago · 8 km deep · 43 km away
Before
Earthquakes todayOregon earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event uw10860803. Read Tue, Sep 22, 2026, 11:33 AM UTC.