M2.1 earthquake 22 km N of Carson, Washington
A magnitude 2.1 earthquake struck 22 km N of Carson, Washington on Sat, Oct 1, 1977, 6:46 PM PDT (01:46 UTC), -1 km (-1 mi) below the surface.
A larger quake followed: M2.2 16 km ENE of Yacolt, Washington. This one was a foreshock.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 2.1 (md), micro
- Local time
- UTC
- 1977-10-02 01:46:02 UTC
- Depth
- -1.3 km (-0.8 mi), shallow
- Epicenter
- 45.927° N, 121.814° 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 15.1 km horizontally, 19.2 km in depth
- Depth from
- From location
- Station coverage gap
- 294°, 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 2 in the 30 days before it.
After
- 2.216 km ENE of Yacolt, Washington · 17883 days ago · -1 km deep · 30 km away
- 1.740 km SSE of Morton, Washington · 17878 days ago · 3 km deep · 39 km away
- 1.92 km WSW of Ashford, Washington · 17846 days ago · 0 km deep · 94 km away
- 1.92 km SW of Ashford, Washington · 17846 days ago · -1 km deep · 92 km away
- 2.17 km SE of Mossyrock, Washington · 17839 days ago · 16 km deep · 77 km away
Before
Earthquakes todayWashington earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event uw10844813. Read Wed, Sep 23, 2026, 8:44 AM UTC.