M3.2 earthquake 175 km W of Ferndale, California
A magnitude 3.2 earthquake struck 175 km W of Ferndale, California on Mon, Oct 18, 2021, 2:59 PM PDT (21:59 UTC), 10 km (6 mi) below the surface.
A larger quake followed: M4.1 94km W of Trinidad, CA. This one was a foreshock.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 3.2 (ML, local (Richter)), minor
- Magnitude from
- USGS National Earthquake Information Center
- Local time
- UTC
- 2021-10-18 21:59:41 UTC
- Depth
- 10.0 km (6.2 mi), shallow
- Epicenter
- 40.819° N, 126.313° W
- Region
- California
- Tsunami flag
- No
- Status
- Reviewed by a seismologist
Magnitude estimates
Different scales measure different things and differ by a few tenths. The USGS marks one as preferred, and it is the one this page uses.
| Mag. | Scale | Computed by | Notes |
|---|---|---|---|
| 3.2 | ML, local (Richter) | USGS National Earthquake Information Center | Preferred · Reviewed · ±0.045 · 64 stations |
| 3.38 | ML, local (Richter) | Northern California Seismic System | Final · ±0.247 · 21 stations |
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 4.1 km horizontally, 2.0 km in depth
- Magnitude uncertainty
- ±0.04
- Depth from
- Operator assigned
- Station coverage gap
- 270°, 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: 10 in the 60 days after this one and 1 in the 30 days before it.
After
- 2.7154 km WNW of Indianola, California · 1802 days ago · 10 km deep · 37 km away
- 3.0111km W of Petrolia, CA · 1791 days ago · 19 km deep · 82 km away
- 2.8101km W of Petrolia, CA · 1777 days ago · 5 km deep · 85 km away
- 3.0262 km W of Indianola, California · 1775 days ago · 10 km deep · 89 km away
- 4.194km W of Trinidad, CA · 1772 days ago · 24 km deep · 94 km away · felt by 4
- 3.297km W of Trinidad, CA · 1772 days ago · 25 km deep · 91 km away
- 3.1182 km W of Ferndale, California · 1771 days ago · 10 km deep · 45 km away
- 3.0160 km W of Ferndale, California · 1764 days ago · 10 km deep · 17 km away · felt by 3
- 2.7100km W of Petrolia, CA · 1762 days ago · 10 km deep · 85 km away
- 4.0112km W of Petrolia, CA · 1761 days ago · 27 km deep · 76 km away · felt by 4
Before
Earthquakes todayCalifornia earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event us6000fvr2 (also filed as nc73641310). Read Sun, Oct 4, 2026, 9:47 AM UTC.