California earthquakes

M2.2 earthquake 12 km NNE of Angwin, California

A magnitude 2.2 earthquake struck 12 km NNE of Angwin, California on Sat, May 2, 1987, 4:43 PM PDT (23:43 UTC), 8 km (5 mi) below the surface.

A larger quake followed: M2.8 6 km W of Cobb, California. This one was a foreshock.

Angwin 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
2.2 (md), micro
Local time
UTC
1987-05-02 23:43:26 UTC
Depth
7.5 km (4.7 mi), shallow
Epicenter
38.677° N, 122.384° 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 0.3 km horizontally, 0.7 km in depth
Magnitude uncertainty
±0.13
Depth from
From location
Station coverage gap
114°
Stations used
26

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 178 in the 60 days after this one and 0 in the 30 days before it.

After

  1. 2.86 km W of Cobb, California · 14371 days ago · 3 km deep · 39 km away
  2. 1.69 km W of Cobb, California · 14370 days ago · 0 km deep · 42 km away
  3. 1.95 km WSW of Cobb, California · 14370 days ago · 1 km deep · 37 km away
  4. 1.68 km W of Cobb, California · 14370 days ago · -1 km deep · 41 km away
  5. 1.56 km W of Cobb, California · 14370 days ago · 3 km deep · 39 km away
  6. 1.65 km W of Cobb, California · 14370 days ago · -1 km deep · 38 km away
  7. 1.5Northern California · 14370 days ago · 8 km deep · 17 km away
  8. 1.86 km SSE of Cottonwood, California · 14369 days ago · 0 km deep · 40 km away
  9. 1.56 km W of Cobb, California · 14369 days ago · 4 km deep · 39 km away
  10. 1.67 km WSW of Cobb, California · 14368 days ago · 1 km deep · 39 km away
  11. 1.65 km N of Winters, California · 14368 days ago · 1 km deep · 38 km away
  12. 2.11 km NNW of Winters, California · 14368 days ago · 2 km deep · 38 km away
  13. 2.14 km W of Cobb, California · 14367 days ago · 0 km deep · 38 km away
  14. 1.86 km W of Cobb, California · 14367 days ago · 3 km deep · 39 km away
  15. 2.39 km W of Cobb, California · 14366 days ago · 0 km deep · 41 km away
  16. 1.78 km W of Cobb, California · 14366 days ago · -1 km deep · 42 km away
  17. 1.86 km W of Cobb, California · 14366 days ago · 3 km deep · 39 km away
  18. 2.09 km W of Cobb, California · 14366 days ago · 0 km deep · 42 km away
  19. 1.6Northern California · 14366 days ago · 4 km deep · 48 km away
  20. 1.85 km WSW of Cobb, California · 14365 days ago · 1 km deep · 37 km away
  21. 2.19 km SE of Sea Ranch, California · 14365 days ago · -1 km deep · 87 km away
  22. 1.8Northern California · 14365 days ago · 9 km deep · 33 km away
  23. 1.75 km SW of Cobb, California · 14365 days ago · 5 km deep · 35 km away
  24. 1.85 km SW of Cobb, California · 14365 days ago · 4 km deep · 34 km away
  25. 1.50 km NE of Pleasant Hill, California · 14365 days ago · 9 km deep · 85 km away
  26. 1.56 km WSW of Cobb, California · 14365 days ago · 3 km deep · 39 km away
  27. 1.61 km NE of Pleasant Hill, California · 14365 days ago · 8 km deep · 85 km away
  28. 2.07 km W of Cobb, California · 14364 days ago · 1 km deep · 40 km away
  29. 2.28 km WSW of Cobb, California · 14364 days ago · 2 km deep · 40 km away
  30. 1.77 km WSW of Cobb, California · 14364 days ago · 3 km deep · 38 km away
  31. 2.07 km W of Cobb, California · 14364 days ago · 1 km deep · 40 km away
  32. 1.65 km W of Cobb, California · 14363 days ago · 2 km deep · 38 km away
  33. 1.63 km W of Cobb, California · 14363 days ago · 0 km deep · 37 km away
  34. 2.67 km W of Cobb, California · 14363 days ago · 1 km deep · 40 km away
  35. 1.610 km SE of Sea Ranch, California · 14363 days ago · 4 km deep · 85 km away
  36. 1.75 km WNW of Cobb, California · 14363 days ago · 1 km deep · 39 km away
  37. 2.17 km WSW of Cobb, California · 14363 days ago · 1 km deep · 39 km away
  38. 1.75 km WSW of Cobb, California · 14363 days ago · 0 km deep · 36 km away
  39. 1.65 km SW of Cobb, California · 14363 days ago · -1 km deep · 36 km away
  40. 3.35 km WSW of Cobb, California · 14363 days ago · 1 km deep · 37 km away
  41. 2.06 km SW of Cobb, California · 14363 days ago · -1 km deep · 37 km away
  42. 2.95 km WSW of Cobb, California · 14363 days ago · -1 km deep · 37 km away
  43. 1.65 km SW of Cobb, California · 14363 days ago · 0 km deep · 37 km away
  44. 1.81 km WNW of Concord, California · 14362 days ago · 12 km deep · 83 km away
  45. 1.66 km SW of Cobb, California · 14362 days ago · 1 km deep · 35 km away
  46. 1.716 km NNE of Upper Lake, California · 14362 days ago · 4 km deep · 78 km away
  47. 1.77 km WSW of Cobb, California · 14362 days ago · 4 km deep · 39 km away
  48. 2.44 km WNW of Cobb, California · 14362 days ago · 0 km deep · 37 km away
  49. 2.36 km WSW of Cobb, California · 14362 days ago · 4 km deep · 38 km away
  50. 1.94 km WNW of Cobb, California · 14362 days ago · 0 km deep · 38 km away
  51. 1.75 km SW of Cobb, California · 14362 days ago · 2 km deep · 36 km away
  52. 1.64 km SW of Cobb, California · 14362 days ago · -1 km deep · 36 km away
  53. 2.25 km W of Cobb, California · 14362 days ago · 1 km deep · 39 km away
  54. 3.34 km WNW of Cobb, California · 14361 days ago · 2 km deep · 38 km away
  55. 1.84 km SW of Hopland, California · 14361 days ago · 5 km deep · 73 km away
  56. 1.68 km W of Cobb, California · 14360 days ago · 1 km deep · 41 km away
  57. 1.614 km ENE of Angwin, California · 14360 days ago · -1 km deep · 11 km away
  58. 2.45 km W of Cobb, California · 14360 days ago · 1 km deep · 39 km away
  59. 2.55 km W of Cobb, California · 14360 days ago · 2 km deep · 39 km away
  60. 1.84 km W of Cobb, California · 14360 days ago · 0 km deep · 37 km away

The first 60 of 178.

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc99722. Read Tue, Sep 22, 2026, 9:25 PM UTC.