California earthquakes

M2.9 earthquake 122 km WSW of Ferndale, California

A magnitude 2.9 earthquake struck 122 km WSW of Ferndale, California on Fri, Apr 5, 1985, 1:00 PM PST (21:00 UTC), 4 km (3 mi) below the surface.

A larger quake followed: M3.5 43 km SW of Ferndale, California. This one was a foreshock.

Ferndale forecastMore in California

Map

Where this earthquake was located, with the others nearby. Select one for its page.

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The earthquake

Magnitude
2.9 (md), micro
Local time
UTC
1985-04-05 21:00:35 UTC
Depth
4.1 km (2.5 mi), shallow
Epicenter
40.316° N, 125.665° W
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 7.5 km horizontally, 9.3 km in depth
Magnitude uncertainty
±0.15
Depth from
From location
Station coverage gap
320°, poorly surrounded by stations
Stations used
7

Nearest places

Distance and direction from each place to the epicenter, with its forecast.

Nearby

Within 100 km, magnitude 1.5 and up: 20 in the 60 days after this one and 6 in the 30 days before it.

After

  1. 3.543 km SW of Ferndale, California · 15144 days ago · 23 km deep · 82 km away
  2. 4.0114 km W of Ferndale, California · 15144 days ago · 5 km deep · 35 km away
  3. 2.237 km WSW of Ferndale, California · 15142 days ago · 25 km deep · 85 km away
  4. 3.089 km W of Ferndale, California · 15140 days ago · 35 km deep · 41 km away
  5. 3.837 km SSW of Ferndale, California · 15137 days ago · 15 km deep · 98 km away
  6. 3.442 km WSW of Ferndale, California · 15137 days ago · 15 km deep · 79 km away
  7. 3.441 km WSW of Ferndale, California · 15134 days ago · 18 km deep · 84 km away
  8. 2.431 km W of Ferndale, California · 15133 days ago · 17 km deep · 91 km away
  9. 2.763 km WSW of Ferndale, California · 15132 days ago · -1 km deep · 58 km away
  10. 2.946 km WSW of Ferndale, California · 15129 days ago · 4 km deep · 76 km away
  11. 2.9118km W of Ferndale, CA · 15127 days ago · 22 km deep · 27 km away
  12. 2.8155km W of Petrolia, CA · 15116 days ago · 10 km deep · 39 km away
  13. 2.344 km SW of Ferndale, California · 15114 days ago · 21 km deep · 86 km away
  14. 4.3104 km W of Ferndale, California · 15108 days ago · 7 km deep · 20 km away
  15. 3.0off the coast of Northern California · 15106 days ago · 2 km deep · 45 km away
  16. 2.630 km SW of Ferndale, California · 15105 days ago · 17 km deep · 98 km away
  17. 3.394 km W of Ferndale, California · 15103 days ago · 3 km deep · 31 km away
  18. 2.586 km W of Ferndale, California · 15101 days ago · 4 km deep · 37 km away
  19. 2.628 km SW of Ferndale, California · 15087 days ago · 24 km deep · 97 km away
  20. 2.152 km SW of Ferndale, California · 15087 days ago · 19 km deep · 79 km away

Before

  1. 2.354 km W of Ferndale, California · 15146 days ago · 4 km deep · 69 km away
  2. 2.843 km SSW of Ferndale, California · 15150 days ago · 11 km deep · 95 km away
  3. 3.071 km W of Ferndale, California · 15152 days ago · 4 km deep · 57 km away
  4. 2.932 km SW of Ferndale, California · 15160 days ago · 20 km deep · 98 km away
  5. 3.043 km SW of Ferndale, California · 15161 days ago · 18 km deep · 86 km away
  6. 2.761 km WSW of Ferndale, California · 15166 days ago · 25 km deep · 63 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc46162. Read Tue, Sep 22, 2026, 8:25 PM UTC.