M1.8 earthquake 39 km SSE of Morton, Washington
A magnitude 1.8 earthquake struck 39 km SSE of Morton, Washington on Mon, Dec 10, 1973, 5:16 AM PST (13:16 UTC), 10 km (6 mi) below the surface.
A larger quake followed: M2.8 12 km NE of Ashford, 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
- 1973-12-10 13:16:46 UTC
- Depth
- 9.9 km (6.2 mi), shallow
- Epicenter
- 46.211° N, 122.146° 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 5.5 km horizontally, 6.5 km in depth
- Magnitude uncertainty
- ±0.15
- Depth from
- From location
- Station coverage gap
- 229°, 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: 5 in the 60 days after this one and 3 in the 30 days before it.
After
- 2.812 km NE of Ashford, Washington · 19278 days ago · 8 km deep · 72 km away
- 1.618 km SSW of Nile, Washington · 19276 days ago · 23 km deep · 97 km away
- 2.518 km E of Packwood, Washington · 19267 days ago · 3 km deep · 71 km away
- 2.110 km NE of Ashford, Washington · 19257 days ago · 11 km deep · 71 km away
- 1.91 km W of La Grande, Washington · 19233 days ago · 5 km deep · 71 km away
Before
Earthquakes todayWashington earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event uw10840298. Read Tue, Sep 22, 2026, 10:41 AM UTC.