M2.3 earthquake 16 km WNW of Ione, Oregon
A magnitude 2.3 earthquake struck 16 km WNW of Ione, Oregon on Sun, Aug 20, 1972, 8:52 AM PDT (15:52 UTC), 6 km (4 mi) below the surface.
A larger quake followed: M2.6 15 km WNW of Ione, Oregon. This one was a foreshock.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 2.3 (md), micro
- Local time
- UTC
- 1972-08-20 15:52:31 UTC
- Depth
- 6.2 km (3.8 mi), shallow
- Epicenter
- 45.562° N, 120.018° 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 6.8 km horizontally, 5.2 km in depth
- Magnitude uncertainty
- ±0.25
- Depth from
- Operator assigned
- Station coverage gap
- 287°, poorly surrounded by stations
- Stations used
- 12
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 todayOregon earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event uw10853818. Read Tue, Sep 22, 2026, 3:34 PM UTC.