M1.5 earthquake 31 km NNE of Idanha, Oregon
A magnitude 1.5 earthquake struck 31 km NNE of Idanha, Oregon on Thu, Mar 26, 1981, 2:30 PM PST (22:30 UTC), 15 km (9 mi) below the surface.
A larger quake followed: M1.9 Oregon. This one was a foreshock.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 1.5 (md), micro
- Local time
- UTC
- 1981-03-26 22:30:24 UTC
- Depth
- 14.6 km (9.1 mi), shallow
- Epicenter
- 44.942° N, 121.866° 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 1.3 km horizontally, 4.1 km in depth
- Magnitude uncertainty
- ±0.16
- Depth from
- From location
- Station coverage gap
- 150°
- Stations used
- 10
Nearest places
Distance and direction from each place to the epicenter, with its forecast.
Nearby
Within 100 km, magnitude 1.5 and up: 5 in the 60 days after this one and 1 in the 30 days before it.
After
- 1.9Oregon · 16588 days ago · 6 km deep · 56 km away
- 1.83 km N of Mount Hood, Oregon · 16582 days ago · 4 km deep · 74 km away
- 1.810 km W of Pine Hollow, Oregon · 16579 days ago · 4 km deep · 49 km away
- 2.16 km W of Pine Grove, Oregon · 16579 days ago · 5 km deep · 39 km away
- 1.57 km NNE of Government Camp, Oregon · 16575 days ago · 3 km deep · 48 km away
Before
Earthquakes todayOregon earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event uw10108388. Read Tue, Sep 22, 2026, 5:17 PM UTC.