M2.5 earthquake 4 km W of Ilwaco, Washington
A magnitude 2.5 earthquake struck 4 km W of Ilwaco, Washington on Sat, Dec 23, 1972, 2:11 PM PST (22:11 UTC), 11 km (7 mi) below the surface.
A larger quake followed: M2.6 6 km SSE of Brady, Washington. This one was a foreshock.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 2.5 (md), micro
- Local time
- UTC
- 1972-12-23 22:11:36 UTC
- Depth
- 10.7 km (6.6 mi), shallow
- Epicenter
- 46.307° N, 124.097° W
- Region
- Washington
- 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 1.6 km horizontally, 2.9 km in depth
- Magnitude uncertainty
- ±0.19
- Depth from
- From location
- Station coverage gap
- 300°, poorly surrounded by stations
- Stations used
- 6
Nearest places
Distance and direction from each place to the epicenter, with its forecast.
Nearby
Within 100 km, magnitude 1.5 and up: 1 in the 60 days after this one and 0 in the 30 days before it.
After
Earthquakes todayWashington earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event uw10855413. Read Tue, Sep 22, 2026, 4:53 AM UTC.