California earthquakes

M1.8 earthquake 8 km E of Bear Valley, California

A magnitude 1.8 earthquake struck 8 km E of Bear Valley, California on Fri, Feb 20, 1987, 11:16 PM PST (07:16 UTC), 4 km (3 mi) below the surface.

A larger quake followed: M2.9 7 km S of Bridgeport, California. 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
1.8 (Md, duration), micro
Magnitude from
Northern California Seismic System
Local time
UTC
1987-02-21 07:16:01 UTC
Depth
4.4 km (2.7 mi), shallow
Epicenter
37.579° N, 120.022° 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 0.8 km horizontally, 9.3 km in depth
Magnitude uncertainty
±0.05
Depth from
From location
Station coverage gap
124°
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: 32 in the 60 days after this one and 11 in the 30 days before it.

After

  1. 1.67 km ESE of Mammoth Lakes, California · 14467 days ago · 1 km deep · 100 km away
  2. 2.97 km S of Bridgeport, California · 14465 days ago · 7 km deep · 96 km away
  3. 1.711 km S of Mariposa, California · 14464 days ago · 10 km deep · 23 km away
  4. 1.820 km SE of Yosemite Valley, California · 14457 days ago · 4 km deep · 56 km away
  5. 1.86 km WSW of Big Creek, California · 14455 days ago · 3 km deep · 77 km away
  6. 2.24 km ESE of La Vina, California · 14455 days ago · 5 km deep · 80 km away
  7. 2.37 km SE of Mammoth Lakes, California · 14454 days ago · 2 km deep · 97 km away
  8. 2.313 km WNW of La Vina, California · 14454 days ago · 5 km deep · 75 km away
  9. 1.817 km SE of Yosemite Valley, California · 14453 days ago · -2 km deep · 53 km away
  10. 2.023 km ESE of Yosemite Valley, California · 14447 days ago · 21 km deep · 61 km away
  11. 1.911 km SSE of Catheys Valley, California · 14447 days ago · 4 km deep · 27 km away
  12. 2.315 km ESE of Yosemite Valley, California · 14447 days ago · 27 km deep · 55 km away
  13. 1.67 km ESE of Mammoth Lakes, California · 14446 days ago · 3 km deep · 100 km away
  14. 1.84 km E of Mammoth Lakes, California · 14441 days ago · 7 km deep · 97 km away
  15. 2.411 km WNW of Bridgeport, California · 14438 days ago · 5 km deep · 97 km away
  16. 2.212 km NNE of Friant, California · 14433 days ago · 11 km deep · 61 km away
  17. 1.53 km ESE of Mammoth Lakes, California · 14432 days ago · 4 km deep · 96 km away
  18. 2.015 km SE of Yosemite Valley, California · 14431 days ago · 3 km deep · 53 km away
  19. 1.97 km ESE of Mono City, California · 14430 days ago · 10 km deep · 98 km away
  20. 2.616 km SSE of Catheys Valley, California · 14430 days ago · 13 km deep · 31 km away
  21. 1.714 km SE of Catheys Valley, California · 14429 days ago · 5 km deep · 28 km away
  22. 1.57 km SE of Mammoth Lakes, California · 14428 days ago · 3 km deep · 98 km away
  23. 1.726 km S of Mammoth Lakes, California · 14427 days ago · -2 km deep · 90 km away
  24. 2.013 km SSW of Bootjack, California · 14424 days ago · 36 km deep · 27 km away
  25. 2.97 km ESE of Mammoth Lakes, California · 14423 days ago · 1 km deep · 100 km away
  26. 2.57 km ESE of Mammoth Lakes, California · 14423 days ago · 2 km deep · 100 km away
  27. 2.37 km ESE of Mammoth Lakes, California · 14423 days ago · 1 km deep · 100 km away
  28. 2.27 km ESE of Mammoth Lakes, California · 14423 days ago · 2 km deep · 100 km away
  29. 2.37 km ESE of Mammoth Lakes, California · 14423 days ago · 1 km deep · 100 km away
  30. 1.89 km SSE of Copperopolis, California · 14416 days ago · 6 km deep · 62 km away
  31. 1.7Central California · 14413 days ago · 5 km deep · 78 km away
  32. 1.95 km SW of Mokelumne Hill, California · 14412 days ago · 0 km deep · 99 km away

Before

  1. 2.215 km ENE of Yosemite Valley, California · 14473 days ago · 24 km deep · 58 km away
  2. 1.74 km ESE of Rancho Calaveras, California · 14473 days ago · 5 km deep · 91 km away
  3. 2.47 km S of Catheys Valley, California · 14474 days ago · 10 km deep · 24 km away
  4. 1.613 km SSE of Catheys Valley, California · 14478 days ago · 7 km deep · 28 km away
  5. 2.16 km WSW of Madera Acres, California · 14482 days ago · 9 km deep · 66 km away
  6. 2.03 km E of Forest Meadows, California · 14482 days ago · 22 km deep · 72 km away
  7. 1.51 km S of Mammoth Lakes, California · 14489 days ago · 6 km deep · 93 km away
  8. 2.04 km NNE of Greeley Hill, California · 14490 days ago · 29 km deep · 24 km away
  9. 1.5California-Nevada border region · 14493 days ago · 3 km deep · 99 km away
  10. 1.812 km S of Los Banos, California · 14496 days ago · 2 km deep · 100 km away
  11. 1.84 km WSW of Mammoth Lakes, California · 14498 days ago · 3 km deep · 89 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc95187. Read Fri, Oct 2, 2026, 7:03 AM UTC.