California earthquakes

M2.4 earthquake 108 km W of Ferndale, California

A magnitude 2.4 earthquake struck 108 km W of Ferndale, California on Fri, Dec 20, 1985, 7:10 AM PST (15:10 UTC), 6 km (4 mi) below the surface.

A larger quake followed: M3.9 58 km W of Shelter Cove, 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
2.4 (md), micro
Local time
UTC
1985-12-20 15:10:45 UTC
Depth
6.2 km (3.8 mi), shallow
Epicenter
40.430° N, 125.530° 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 6.2 km horizontally, 12.9 km in depth
Magnitude uncertainty
±0.08
Depth from
From location
Station coverage gap
298°, poorly surrounded by stations
Stations used
11

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 19 in the 60 days after this one and 12 in the 30 days before it.

After

  1. 2.037 km W of Ferndale, California · 14892 days ago · 4 km deep · 71 km away
  2. 3.652 km SW of Ferndale, California · 14891 days ago · 11 km deep · 71 km away
  3. 2.627 km SSW of Ferndale, California · 14890 days ago · 17 km deep · 95 km away
  4. 1.739 km SSW of Ferndale, California · 14889 days ago · 4 km deep · 91 km away
  5. 2.033 km WSW of Ferndale, California · 14886 days ago · 15 km deep · 79 km away
  6. 3.958 km W of Shelter Cove, California · 14884 days ago · 4 km deep · 74 km away
  7. 2.629 km SW of Scotia, California · 14877 days ago · 8 km deep · 99 km away
  8. 2.228 km SW of Scotia, California · 14877 days ago · 6 km deep · 99 km away
  9. 2.831 km SW of Scotia, California · 14873 days ago · 16 km deep · 97 km away
  10. 2.645 km WNW of Samoa, California · 14871 days ago · 4 km deep · 90 km away
  11. 1.79 km WSW of Ferndale, California · 14870 days ago · 17 km deep · 99 km away
  12. 3.035 km WSW of Ferndale, California · 14865 days ago · 23 km deep · 76 km away
  13. 2.733 km SSW of Ferndale, California · 14861 days ago · 11 km deep · 93 km away
  14. 3.591 km W of Ferndale, California · 14861 days ago · 2 km deep · 17 km away
  15. 2.749 km WNW of Shelter Cove, California · 14852 days ago · 4 km deep · 83 km away
  16. 3.065 km WNW of Ferndale, California · 14851 days ago · 0 km deep · 52 km away
  17. 2.693 km W of Ferndale, California · 14849 days ago · 13 km deep · 15 km away
  18. 3.537 km W of Ferndale, California · 14846 days ago · 17 km deep · 72 km away
  19. 2.439 km WSW of Ferndale, California · 14842 days ago · 14 km deep · 69 km away

Before

  1. 2.422 km SW of Ferndale, California · 14894 days ago · 14 km deep · 92 km away
  2. 2.626 km SW of Ferndale, California · 14894 days ago · 16 km deep · 86 km away
  3. 1.631 km SSW of Ferndale, California · 14895 days ago · 5 km deep · 96 km away
  4. 3.337 km WSW of Ferndale, California · 14897 days ago · 22 km deep · 75 km away
  5. 2.332 km SW of Ferndale, California · 14901 days ago · 15 km deep · 82 km away
  6. 2.232 km SW of Ferndale, California · 14901 days ago · 15 km deep · 81 km away
  7. 4.245 km W of Ferndale, California · 14908 days ago · 19 km deep · 66 km away
  8. 1.648 km SW of Ferndale, California · 14909 days ago · 4 km deep · 69 km away
  9. 3.236 km WSW of Ferndale, California · 14915 days ago · 30 km deep · 74 km away
  10. 2.856 km WSW of Ferndale, California · 14919 days ago · 16 km deep · 53 km away
  11. 2.725 km SSW of Ferndale, California · 14922 days ago · 39 km deep · 98 km away
  12. 3.055 km W of Shelter Cove, California · 14922 days ago · 4 km deep · 77 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc63014. Read Tue, Sep 29, 2026, 12:01 AM UTC.