California earthquakes

M2.1 earthquake 40km WSW of Tecopa, CA

A magnitude 2.1 earthquake struck 40km WSW of Tecopa, CA on Sun, May 31, 1981, 4:27 PM PDT (23:27 UTC), 5 km (3 mi) below the surface.

A larger quake followed: M3.1 15km NE of Inyokern, CA. This one was a foreshock.

Fort Irwin 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
2.1 (mc), micro
Local time
UTC
1981-05-31 23:27:24 UTC
Depth
5.1 km (3.2 mi), shallow
Epicenter
35.701° N, 116.626° 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 2.1 km horizontally, 31.6 km in depth
Depth from
Operator assigned
Station coverage gap
236°, 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: 25 in the 60 days after this one and 10 in the 30 days before it.

After

  1. 1.516km NNE of Inyokern, CA · 16546 days ago · 4 km deep · 99 km away
  2. 1.816km NNE of Ridgecrest, CA · 16545 days ago · 5 km deep · 91 km away
  3. 3.115km NE of Inyokern, CA · 16545 days ago · 1 km deep · 99 km away
  4. 1.714km NNE of Inyokern, CA · 16545 days ago · -1 km deep · 100 km away
  5. 2.414km NNE of Inyokern, CA · 16545 days ago · 0 km deep · 100 km away
  6. 1.714km NE of Inyokern, CA · 16542 days ago · -1 km deep · 99 km away
  7. 1.815km NNE of Inyokern, CA · 16539 days ago · -1 km deep · 100 km away
  8. 2.130km N of Searles Valley, CA · 16517 days ago · 5 km deep · 81 km away
  9. 2.433km E of Johannesburg, CA · 16516 days ago · 5 km deep · 67 km away
  10. 3.117km NNE of Inyokern, CA · 16516 days ago · 2 km deep · 98 km away
  11. 2.816km NNE of Inyokern, CA · 16516 days ago · -1 km deep · 99 km away
  12. 2.915km NNE of Inyokern, CA · 16515 days ago · -1 km deep · 99 km away
  13. 2.614km NE of Inyokern, CA · 16515 days ago · -1 km deep · 99 km away
  14. 2.114km NE of Inyokern, CA · 16515 days ago · 5 km deep · 99 km away
  15. 3.116km NNE of Inyokern, CA · 16515 days ago · -1 km deep · 99 km away
  16. 1.816km N of Ridgecrest, CA · 16514 days ago · 6 km deep · 98 km away
  17. 1.730km WNW of Ludlow, CA · 16509 days ago · 0 km deep · 95 km away
  18. 1.922km SW of Fort Irwin, CA · 16508 days ago · 1 km deep · 69 km away
  19. 2.015km NNE of Inyokern, CA · 16507 days ago · 2 km deep · 99 km away
  20. 1.915km NE of Inyokern, CA · 16507 days ago · 4 km deep · 99 km away
  21. 2.526km ENE of Furnace Creek, CA · 16506 days ago · 4 km deep · 94 km away
  22. 2.231km ENE of Furnace Creek, CA · 16506 days ago · 4 km deep · 97 km away
  23. 1.932km NE of Boron, CA · 16505 days ago · 5 km deep · 89 km away
  24. 2.416km NNE of Inyokern, CA · 16501 days ago · 2 km deep · 99 km away
  25. 2.020km NNE of Inyokern, CA · 16498 days ago · 4 km deep · 98 km away

Before

  1. 1.824km SSE of Trona, CA · 16552 days ago · 5 km deep · 65 km away
  2. 2.39km ENE of Barstow, CA · 16556 days ago · 5 km deep · 90 km away
  3. 2.133km NNW of Searles Valley, CA · 16563 days ago · -1 km deep · 90 km away
  4. 2.415km NNE of Inyokern, CA · 16568 days ago · -1 km deep · 100 km away
  5. 2.422km NNE of Trona, CA · 16570 days ago · 5 km deep · 68 km away
  6. 1.927km NW of Fort Irwin, CA · 16571 days ago · 2 km deep · 41 km away
  7. 2.422km ENE of Barstow, CA · 16571 days ago · 0 km deep · 82 km away
  8. 2.012km ESE of Johannesburg, CA · 16574 days ago · 4 km deep · 89 km away
  9. 1.927km WNW of Ludlow, CA · 16577 days ago · 5 km deep · 98 km away
  10. 2.523km ESE of Little Lake, CA · 16580 days ago · -1 km deep · 96 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event ci516869. Read Wed, Sep 23, 2026, 12:52 AM UTC.