California earthquakes

M3.9 earthquake 10km SE of Ocotillo, CA

A magnitude 3.9 earthquake struck 10km SE of Ocotillo, CA on Sun, Nov 12, 1939, 10:49 AM GMT-8 (18:49 UTC), 6 km (4 mi) below the surface.

A larger quake followed: M4.2 16km ENE of Calipatria, CA. This one was a foreshock.

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Map

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

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The earthquake

Magnitude
3.9 (ml), minor
Local time
UTC
1939-11-12 18:49:00 UTC
Depth
6.0 km (3.7 mi), shallow
Epicenter
32.664° N, 115.924° 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 99.0 km horizontally, 31.6 km in depth
Magnitude uncertainty
±0.13
Depth from
Operator assigned
Station coverage gap
351°, poorly surrounded by stations
Stations used
3

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 14 in the 60 days after this one and 0 in the 30 days before it.

After

  1. 3.010km NNE of Borrego Springs, CA · 31725 days ago · 6 km deep · 85 km away
  2. 3.011km SSW of Borrego Springs, CA · 31712 days ago · 6 km deep · 74 km away
  3. 3.312km ENE of Ocotillo Wells, CA · 31710 days ago · 6 km deep · 57 km away
  4. 3.013km SSE of Borrego Springs, CA · 31707 days ago · 6 km deep · 66 km away
  5. 3.810km SSE of Borrego Springs, CA · 31703 days ago · 6 km deep · 69 km away
  6. 3.39km SSW of Borrego Springs, CA · 31694 days ago · 6 km deep · 74 km away
  7. 3.54km N of Westmorland, CA · 31690 days ago · 6 km deep · 53 km away
  8. 4.216km ENE of Calipatria, CA · 31677 days ago · 6 km deep · 77 km away
  9. 3.517km S of Ocotillo, CA · 31676 days ago · 6 km deep · 11 km away
  10. 3.612km ENE of Calipatria, CA · 31676 days ago · 6 km deep · 74 km away
  11. 4.010km NNW of Ocotillo Wells, CA · 31674 days ago · 6 km deep · 67 km away
  12. 3.49km S of Borrego Springs, CA · 31673 days ago · 6 km deep · 70 km away
  13. 3.310km NNW of Niland, CA · 31671 days ago · 6 km deep · 82 km away
  14. 3.36km NNW of Bombay Beach, CA · 31671 days ago · 6 km deep · 83 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event ci3365148. Read Tue, Sep 22, 2026, 8:51 PM UTC.