California earthquakes

M2.1 earthquake 1 km NNW of Winters, California

A magnitude 2.1 earthquake struck 1 km NNW of Winters, California on Fri, May 22, 1987, 6:09 PM PDT (01:09 UTC), 2 km (1 mi) below the surface.

A larger quake followed: M3.4 3 km N of San Leandro, California. This one was a foreshock.

Winters 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 (md), micro
Local time
UTC
1987-05-23 01:09:25 UTC
Depth
1.9 km (1.2 mi), shallow
Epicenter
38.538° N, 121.981° 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 1.1 km horizontally, 6.3 km in depth
Magnitude uncertainty
±0.18
Depth from
From location
Station coverage gap
198°, 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: 173 in the 60 days after this one and 122 in the 30 days before it.

After

  1. 2.14 km W of Cobb, California · 14374 days ago · 0 km deep · 76 km away
  2. 1.86 km W of Cobb, California · 14374 days ago · 3 km deep · 78 km away
  3. 2.39 km W of Cobb, California · 14373 days ago · 0 km deep · 80 km away
  4. 1.78 km W of Cobb, California · 14373 days ago · -1 km deep · 80 km away
  5. 1.86 km W of Cobb, California · 14372 days ago · 3 km deep · 77 km away
  6. 2.09 km W of Cobb, California · 14372 days ago · 0 km deep · 80 km away
  7. 1.6Northern California · 14372 days ago · 4 km deep · 86 km away
  8. 1.85 km WSW of Cobb, California · 14372 days ago · 1 km deep · 75 km away
  9. 1.8Northern California · 14372 days ago · 9 km deep · 71 km away
  10. 1.75 km SW of Cobb, California · 14372 days ago · 5 km deep · 74 km away
  11. 1.85 km SW of Cobb, California · 14372 days ago · 4 km deep · 73 km away
  12. 1.50 km NE of Pleasant Hill, California · 14372 days ago · 9 km deep · 65 km away
  13. 1.56 km WSW of Cobb, California · 14371 days ago · 3 km deep · 77 km away
  14. 1.61 km NE of Pleasant Hill, California · 14371 days ago · 8 km deep · 65 km away
  15. 3.43 km N of San Leandro, California · 14371 days ago · 5 km deep · 88 km away
  16. 3.0Northern California · 14371 days ago · 5 km deep · 89 km away
  17. 2.43 km NNE of San Leandro, California · 14371 days ago · 5 km deep · 88 km away
  18. 2.23 km N of San Leandro, California · 14371 days ago · 4 km deep · 88 km away
  19. 2.07 km W of Cobb, California · 14371 days ago · 1 km deep · 79 km away
  20. 2.53 km NNE of San Leandro, California · 14371 days ago · 5 km deep · 88 km away
  21. 1.94 km ESE of San Ramon, California · 14371 days ago · 3 km deep · 86 km away
  22. 2.34 km ESE of San Ramon, California · 14371 days ago · 7 km deep · 86 km away
  23. 2.04 km ESE of San Ramon, California · 14370 days ago · 7 km deep · 86 km away
  24. 2.28 km WSW of Cobb, California · 14370 days ago · 2 km deep · 78 km away
  25. 1.77 km WSW of Cobb, California · 14370 days ago · 3 km deep · 77 km away
  26. 2.07 km W of Cobb, California · 14370 days ago · 1 km deep · 78 km away
  27. 1.65 km W of Cobb, California · 14370 days ago · 2 km deep · 77 km away
  28. 1.63 km W of Cobb, California · 14370 days ago · 0 km deep · 75 km away
  29. 2.67 km W of Cobb, California · 14370 days ago · 1 km deep · 78 km away
  30. 1.75 km WNW of Cobb, California · 14370 days ago · 1 km deep · 77 km away
  31. 2.17 km WSW of Cobb, California · 14370 days ago · 1 km deep · 77 km away
  32. 1.75 km WSW of Cobb, California · 14369 days ago · 0 km deep · 75 km away
  33. 1.65 km SW of Cobb, California · 14369 days ago · -1 km deep · 74 km away
  34. 3.35 km WSW of Cobb, California · 14369 days ago · 1 km deep · 75 km away
  35. 2.06 km SW of Cobb, California · 14369 days ago · -1 km deep · 75 km away
  36. 2.95 km WSW of Cobb, California · 14369 days ago · -1 km deep · 75 km away
  37. 1.65 km SW of Cobb, California · 14369 days ago · 0 km deep · 75 km away
  38. 1.81 km WNW of Concord, California · 14369 days ago · 12 km deep · 62 km away
  39. 1.66 km SW of Cobb, California · 14369 days ago · 1 km deep · 73 km away
  40. 1.77 km WSW of Cobb, California · 14369 days ago · 4 km deep · 77 km away
  41. 2.62 km NNE of San Leandro, California · 14369 days ago · 4 km deep · 89 km away
  42. 2.44 km WNW of Cobb, California · 14369 days ago · 0 km deep · 76 km away
  43. 2.36 km WSW of Cobb, California · 14369 days ago · 4 km deep · 77 km away
  44. 1.94 km WNW of Cobb, California · 14368 days ago · 0 km deep · 76 km away
  45. 1.75 km SW of Cobb, California · 14368 days ago · 2 km deep · 74 km away
  46. 1.64 km SW of Cobb, California · 14368 days ago · -1 km deep · 74 km away
  47. 2.25 km W of Cobb, California · 14368 days ago · 1 km deep · 77 km away
  48. 3.34 km WNW of Cobb, California · 14367 days ago · 2 km deep · 76 km away
  49. 1.68 km W of Cobb, California · 14367 days ago · 1 km deep · 80 km away
  50. 1.614 km ENE of Angwin, California · 14367 days ago · -1 km deep · 28 km away
  51. 2.45 km W of Cobb, California · 14367 days ago · 1 km deep · 77 km away
  52. 2.55 km W of Cobb, California · 14366 days ago · 2 km deep · 77 km away
  53. 3.22 km NE of San Leandro, California · 14366 days ago · 4 km deep · 90 km away
  54. 2.82 km NNE of San Leandro, California · 14366 days ago · 4 km deep · 90 km away
  55. 1.84 km W of Cobb, California · 14366 days ago · 0 km deep · 76 km away
  56. 2.46 km SW of Cobb, California · 14366 days ago · 1 km deep · 74 km away
  57. 2.36 km SW of Cobb, California · 14366 days ago · 2 km deep · 74 km away
  58. 1.86 km SSW of Sutter, California · 14366 days ago · 5 km deep · 66 km away
  59. 1.65 km SW of Cobb, California · 14366 days ago · 2 km deep · 74 km away
  60. 1.56 km SW of Cobb, California · 14366 days ago · 1 km deep · 74 km away

The first 60 of 173.

Before

  1. 1.65 km N of Winters, California · 14374 days ago · 1 km deep · 4 km away
  2. 1.67 km WSW of Cobb, California · 14375 days ago · 1 km deep · 77 km away
  3. 1.56 km W of Cobb, California · 14375 days ago · 4 km deep · 77 km away
  4. 1.86 km SSE of Cottonwood, California · 14376 days ago · 0 km deep · 8 km away
  5. 1.5Northern California · 14376 days ago · 8 km deep · 52 km away
  6. 1.65 km W of Cobb, California · 14376 days ago · -1 km deep · 76 km away
  7. 1.56 km W of Cobb, California · 14376 days ago · 3 km deep · 78 km away
  8. 1.68 km W of Cobb, California · 14376 days ago · -1 km deep · 79 km away
  9. 1.95 km WSW of Cobb, California · 14377 days ago · 1 km deep · 75 km away
  10. 1.69 km W of Cobb, California · 14377 days ago · 0 km deep · 80 km away
  11. 2.86 km W of Cobb, California · 14377 days ago · 3 km deep · 77 km away
  12. 2.04 km W of Cobb, California · 14378 days ago · 0 km deep · 76 km away
  13. 1.78 km W of Cobb, California · 14378 days ago · 4 km deep · 80 km away
  14. 2.58 km W of Cobb, California · 14378 days ago · 1 km deep · 79 km away
  15. 1.710 km NW of Cobb, California · 14379 days ago · 0 km deep · 82 km away
  16. 1.52 km SSE of Calistoga, California · 14379 days ago · 2 km deep · 51 km away
  17. 1.58 km W of Cobb, California · 14379 days ago · -1 km deep · 79 km away
  18. 1.77 km W of Cobb, California · 14379 days ago · 3 km deep · 78 km away
  19. 2.07 km W of Cobb, California · 14379 days ago · 1 km deep · 79 km away
  20. 2.35 km W of Cobb, California · 14380 days ago · 0 km deep · 76 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc100975. Read Tue, Sep 29, 2026, 12:08 PM UTC.