M1.8 earthquake 10 km WSW of Chehalis, Washington
A magnitude 1.8 earthquake struck 10 km WSW of Chehalis, Washington on Tue, Jul 18, 1972, 9:00 AM PDT (16:00 UTC), 47 km (29 mi) below the surface.
A larger quake followed: M1.9 1 km S of Vaughn, Washington. This one was a foreshock.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 1.8 (md), micro
- Local time
- UTC
- 1972-07-18 16:00:03 UTC
- Depth
- 46.8 km (29.1 mi), shallow
- Epicenter
- 46.642° N, 123.095° 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.
- Magnitude uncertainty
- ±0.06
- Depth from
- From location
- Station coverage gap
- 307°, poorly surrounded by stations
- Stations used
- 3
Nearest places
Distance and direction from each place to the epicenter, with its forecast.
Nearby
Within 100 km, magnitude 1.5 and up: 3 in the 60 days after this one and 1 in the 30 days before it.
After
- 1.78 km ENE of Ashford, Washington · 19774 days ago · 10 km deep · 90 km away
- 1.91 km S of Vaughn, Washington · 19740 days ago · 17 km deep · 80 km away
- 2.02 km NNE of Shelton, Washington · 19739 days ago · 38 km deep · 66 km away
Before
Earthquakes todayWashington earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event uw10853443. Read Tue, Sep 22, 2026, 11:22 PM UTC.