M2.3 earthquake 16 km W of Winthrop, Washington
A magnitude 2.3 earthquake struck 16 km W of Winthrop, Washington on Mon, Mar 7, 1977, 8:45 PM PST (04:45 UTC), 9 km (6 mi) below the surface.
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
- 1977-03-08 04:45:11 UTC
- Depth
- 9.4 km (5.9 mi), shallow
- Epicenter
- 48.506° N, 120.407° 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 1.1 km horizontally
- Magnitude uncertainty
- ±0.07
- Depth from
- From location
- Station coverage gap
- 194°, poorly surrounded by stations
- Stations used
- 9
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 2 in the 30 days before it.
After
- 2.02 km SSE of Entiat, Washington · 18094 days ago · 6 km deep · 96 km away
- 1.94 km SE of Entiat, Washington · 18064 days ago · 2 km deep · 97 km away
- 1.85 km W of Entiat, Washington · 18050 days ago · 0 km deep · 94 km away
- 1.55 km SSW of Chelan Falls, Washington · 18036 days ago · 4 km deep · 88 km away
Before
Earthquakes todayWashington earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event uw10843273. Read Tue, Sep 22, 2026, 10:23 PM UTC.