California earthquakes

M2.6 earthquake 6 km N of Robbins, California

A magnitude 2.6 earthquake struck 6 km N of Robbins, California on Fri, Oct 30, 1981, 5:41 AM PST (13:41 UTC), 21 km (13 mi) below the surface.

A larger quake followed: M3.1 9 km WSW of Cobb, 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
2.6 (md), micro
Local time
UTC
1981-10-30 13:41:42 UTC
Depth
21.2 km (13.2 mi), shallow
Epicenter
38.928° N, 121.695° 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 0.4 km horizontally, 1.7 km in depth
Magnitude uncertainty
±0.09
Depth from
From location
Station coverage gap
101°
Stations used
23

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 98 in the 60 days after this one and 58 in the 30 days before it.

After

  1. 1.610 km WSW of Cobb, California · 16397 days ago · 3 km deep · 100 km away
  2. 1.89 km WSW of Cobb, California · 16397 days ago · 1 km deep · 99 km away
  3. 3.19 km WSW of Cobb, California · 16397 days ago · 1 km deep · 99 km away
  4. 3.39 km WSW of Cobb, California · 16397 days ago · 1 km deep · 99 km away
  5. 1.98 km WSW of Cobb, California · 16397 days ago · 1 km deep · 99 km away
  6. 1.73 km S of Green Valley, California · 16395 days ago · 9 km deep · 89 km away
  7. 1.64 km SSE of Clear Lake Riviera, California · 16394 days ago · 3 km deep · 87 km away
  8. 2.26 km W of Cobb, California · 16389 days ago · 3 km deep · 96 km away
  9. 1.81 km SSW of Hamilton City, California · 16388 days ago · 6 km deep · 94 km away
  10. 1.5Northern California · 16387 days ago · 19 km deep · 88 km away
  11. 1.78 km S of Hamilton City, California · 16387 days ago · 17 km deep · 88 km away
  12. 1.85 km SW of Cobb, California · 16387 days ago · 0 km deep · 95 km away
  13. 1.8Northern California · 16383 days ago · 0 km deep · 94 km away
  14. 1.99 km WSW of Cobb, California · 16383 days ago · 2 km deep · 99 km away
  15. 2.57 km WSW of Cobb, California · 16383 days ago · 1 km deep · 98 km away
  16. 2.85 km SW of Cobb, California · 16382 days ago · 0 km deep · 95 km away
  17. 1.66 km WSW of Cobb, California · 16382 days ago · -1 km deep · 96 km away
  18. 2.15 km SW of Cobb, California · 16381 days ago · 0 km deep · 95 km away
  19. 1.67 km W of Cobb, California · 16381 days ago · 1 km deep · 97 km away
  20. 2.07 km W of Cobb, California · 16381 days ago · -1 km deep · 97 km away
  21. 2.06 km WSW of Cobb, California · 16381 days ago · 1 km deep · 96 km away
  22. 2.06 km WSW of Cobb, California · 16381 days ago · 1 km deep · 96 km away
  23. 1.96 km WSW of Cobb, California · 16381 days ago · 1 km deep · 96 km away
  24. 2.07 km N of Pittsburg, California · 16379 days ago · 18 km deep · 94 km away
  25. 1.75 km WSW of Cobb, California · 16379 days ago · 0 km deep · 95 km away
  26. 1.95 km WSW of Kenwood, California · 16377 days ago · 9 km deep · 99 km away
  27. 1.57 km WSW of Cobb, California · 16375 days ago · 2 km deep · 97 km away
  28. 1.94 km W of Cobb, California · 16375 days ago · 1 km deep · 94 km away
  29. 2.16 km WSW of Cobb, California · 16375 days ago · 0 km deep · 96 km away
  30. 2.46 km WSW of Cobb, California · 16374 days ago · 1 km deep · 96 km away
  31. 2.57 km WSW of Cobb, California · 16374 days ago · 1 km deep · 97 km away
  32. 2.09 km WSW of Cobb, California · 16373 days ago · 3 km deep · 99 km away
  33. 1.67 km W of Cobb, California · 16372 days ago · 1 km deep · 97 km away
  34. 1.67 km W of Cobb, California · 16372 days ago · 1 km deep · 97 km away
  35. 2.97 km W of Cobb, California · 16372 days ago · 1 km deep · 97 km away
  36. 1.67 km W of Cobb, California · 16372 days ago · 4 km deep · 97 km away
  37. 1.67 km W of Cobb, California · 16372 days ago · 1 km deep · 97 km away
  38. 1.56 km WSW of Cobb, California · 16372 days ago · 1 km deep · 96 km away
  39. 1.57 km W of Cobb, California · 16369 days ago · 0 km deep · 98 km away
  40. 2.26 km W of Cobb, California · 16369 days ago · 3 km deep · 96 km away
  41. 1.65 km SW of Cobb, California · 16369 days ago · -1 km deep · 95 km away
  42. 1.55 km WSW of Cobb, California · 16369 days ago · 0 km deep · 95 km away
  43. 1.76 km W of Cobb, California · 16367 days ago · 3 km deep · 96 km away
  44. 1.78 km W of Cobb, California · 16367 days ago · 0 km deep · 98 km away
  45. 2.29 km WSW of Cobb, California · 16367 days ago · 1 km deep · 99 km away
  46. 1.65 km NW of Moskowite Corner, California · 16367 days ago · 11 km deep · 69 km away
  47. 1.93 km WNW of American Canyon, California · 16366 days ago · 6 km deep · 97 km away
  48. 1.93 km S of South Oroville, California · 16365 days ago · 11 km deep · 61 km away
  49. 1.66 km WSW of Cobb, California · 16362 days ago · 4 km deep · 96 km away
  50. 2.213 km NW of Moskowite Corner, California · 16362 days ago · 9 km deep · 67 km away
  51. 1.6Northern California · 16361 days ago · 1 km deep · 96 km away
  52. 1.86 km WSW of Cobb, California · 16361 days ago · -1 km deep · 96 km away
  53. 2.26 km W of Cobb, California · 16361 days ago · 0 km deep · 97 km away
  54. 2.07 km S of Calistoga, California · 16361 days ago · 7 km deep · 89 km away
  55. 1.67 km W of Cobb, California · 16361 days ago · 1 km deep · 97 km away
  56. 1.6Northern California · 16360 days ago · 1 km deep · 96 km away
  57. 1.58 km WSW of Cobb, California · 16359 days ago · 2 km deep · 99 km away
  58. 2.59 km WSW of Cobb, California · 16358 days ago · 2 km deep · 99 km away
  59. 3.35 km W of Cobb, California · 16357 days ago · 4 km deep · 96 km away
  60. 1.56 km W of Cobb, California · 16357 days ago · 4 km deep · 96 km away

The first 60 of 98.

Before

  1. 2.65 km SW of Cobb, California · 16399 days ago · 0 km deep · 95 km away
  2. 2.26 km W of Cobb, California · 16399 days ago · 0 km deep · 96 km away
  3. 3.17 km W of Cobb, California · 16399 days ago · 1 km deep · 97 km away
  4. 2.07 km W of Cobb, California · 16399 days ago · 1 km deep · 97 km away
  5. 1.59 km WSW of Cobb, California · 16399 days ago · 1 km deep · 99 km away
  6. 2.518 km N of Moskowite Corner, California · 16399 days ago · 8 km deep · 57 km away
  7. 2.417 km N of Moskowite Corner, California · 16399 days ago · 9 km deep · 57 km away
  8. 1.56 km WNW of Cobb, California · 16399 days ago · 1 km deep · 96 km away
  9. 1.818 km N of Moskowite Corner, California · 16400 days ago · 8 km deep · 57 km away
  10. 1.66 km W of Cobb, California · 16400 days ago · 4 km deep · 96 km away
  11. 1.65 km SSW of Cobb, California · 16400 days ago · 0 km deep · 92 km away
  12. 1.77 km WSW of Cobb, California · 16401 days ago · 1 km deep · 97 km away
  13. 2.29 km WSW of Cobb, California · 16405 days ago · 0 km deep · 99 km away
  14. 1.916 km ESE of Alta, California · 16408 days ago · 24 km deep · 96 km away
  15. 2.35 km SW of Cobb, California · 16410 days ago · 0 km deep · 94 km away
  16. 1.57 km WSW of Cobb, California · 16410 days ago · 2 km deep · 97 km away
  17. 1.89 km WSW of Cobb, California · 16411 days ago · 1 km deep · 99 km away
  18. 1.55 km SSW of Cobb, California · 16413 days ago · -1 km deep · 92 km away
  19. 2.010 km N of Pittsburg, California · 16413 days ago · 21 km deep · 91 km away
  20. 1.69 km WSW of Cobb, California · 16414 days ago · 1 km deep · 99 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc1069061. Read Tue, Sep 22, 2026, 3:45 PM UTC.