M2.8 earthquake 189 km W of Ferndale, California
A magnitude 2.8 earthquake struck 189 km W of Ferndale, California on Fri, Apr 23, 2021, 2:49 AM PDT (09:49 UTC), 10 km (6 mi) below the surface.
A larger quake followed: M4.3 265 km W of Ferndale, California. This one was a foreshock.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 2.8 (ML, local (Richter)), micro
- Magnitude from
- USGS National Earthquake Information Center
- Local time
- UTC
- 2021-04-23 09:49:40 UTC
- Depth
- 10.0 km (6.2 mi), shallow
- Epicenter
- 40.821° N, 126.483° W
- Region
- California
- 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 8.7 km horizontally, 2.0 km in depth
- Magnitude uncertainty
- ±0.04
- Depth from
- Operator assigned
- Station coverage gap
- 258°, poorly surrounded by stations
- Stations used
- 34
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 5 in the 30 days before it.
After
- 2.6186 km W of Ferndale, California · 1990 days ago · 10 km deep · 8 km away
- 3.0170 km W of Ferndale, California · 1984 days ago · 11 km deep · 50 km away
- 4.3265 km W of Ferndale, California · 1982 days ago · 10 km deep · 78 km away · felt by 1
- 2.9104km W of Trinidad, CA · 1973 days ago · 24 km deep · 100 km away · felt by 1
- 3.2135km W of Petrolia, CA · 1948 days ago · 23 km deep · 65 km away · felt by 1
Before
- 3.0203 km W of Ferndale, California · 1991 days ago · 16 km deep · 16 km away
- 2.9186 km W of Ferndale, California · 1991 days ago · 10 km deep · 6 km away
- 3.2off the coast of Northern California · 1991 days ago · 15 km deep · 9 km away · felt by 1
- 2.8247 km W of Ferndale, California · 2009 days ago · 12 km deep · 77 km away
- 2.9104km W of Petrolia, CA · 2013 days ago · 16 km deep · 92 km away
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Sources
From the USGS Earthquake Hazards Program and its partner networks, event us6000e3xp. Read Sun, Oct 4, 2026, 6:41 PM UTC.