California earthquakes

M1.6 earthquake 5 km SW of Cobb, California

A magnitude 1.6 earthquake struck 5 km SW of Cobb, California on Fri, Sep 25, 1981, 4:47 AM PDT (11:47 UTC), 0 km (0 mi) below the surface.

A larger quake followed: M1.8 8 km E of Hopland, California. This one was a foreshock.

Cobb 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
1.6 (md), micro
Local time
UTC
1981-09-25 11:47:19 UTC
Depth
-0.2 km (-0.2 mi), shallow
Epicenter
38.789° N, 122.774° 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 0.2 km horizontally, 0.7 km in depth
Magnitude uncertainty
±0.27
Depth from
From location
Station coverage gap
77°
Stations used
11

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 113 in the 60 days after this one and 42 in the 30 days before it.

After

  1. 1.88 km E of Hopland, California · 16433 days ago · 7 km deep · 29 km away
  2. 2.14 km WSW of Cobb, California · 16432 days ago · 1 km deep · 1 km away
  3. 1.54 km WSW of Cobb, California · 16432 days ago · 1 km deep · 2 km away
  4. 2.121 km ENE of Potter Valley, California · 16432 days ago · 0 km deep · 69 km away
  5. 1.62 km E of Calpella, California · 16431 days ago · 5 km deep · 61 km away
  6. 1.720 km NNE of Upper Lake, California · 16430 days ago · 7 km deep · 61 km away
  7. 1.66 km WSW of Cobb, California · 16430 days ago · 2 km deep · 3 km away
  8. 1.86 km NE of Hopland, California · 16429 days ago · 1 km deep · 36 km away
  9. 2.77 km NE of Healdsburg, California · 16429 days ago · 5 km deep · 15 km away
  10. 1.77 km NE of Healdsburg, California · 16428 days ago · 5 km deep · 15 km away
  11. 1.77 km W of Cobb, California · 16428 days ago · 0 km deep · 5 km away
  12. 1.68 km W of Cobb, California · 16427 days ago · 0 km deep · 4 km away
  13. 1.67 km WSW of Cobb, California · 16426 days ago · 4 km deep · 3 km away
  14. 1.89 km WSW of Cobb, California · 16426 days ago · 1 km deep · 5 km away
  15. 1.73 km SSW of Oakville, California · 16426 days ago · 6 km deep · 52 km away
  16. 1.98 km W of Cobb, California · 16425 days ago · -1 km deep · 4 km away
  17. 1.78 km NE of Hopland, California · 16425 days ago · 5 km deep · 36 km away
  18. 2.87 km WSW of Cobb, California · 16425 days ago · 2 km deep · 3 km away
  19. 1.97 km WSW of Cobb, California · 16425 days ago · 1 km deep · 3 km away
  20. 2.111 km ESE of Boonville, California · 16425 days ago · 6 km deep · 46 km away
  21. 1.66 km WSW of Cobb, California · 16424 days ago · 0 km deep · 2 km away
  22. 2.35 km WSW of Cobb, California · 16424 days ago · 1 km deep · 3 km away
  23. 1.82 km NNW of Ukiah, California · 16423 days ago · 0 km deep · 57 km away
  24. 2.17 km W of Cobb, California · 16422 days ago · 0 km deep · 6 km away
  25. 2.06 km W of Cobb, California · 16422 days ago · 4 km deep · 3 km away
  26. 1.65 km SW of Cobb, California · 16421 days ago · 0 km deep · 0 km away
  27. 2.15 km SW of Cobb, California · 16421 days ago · 0 km deep · 1 km away
  28. 1.65 km WSW of Hopland, California · 16421 days ago · 5 km deep · 38 km away
  29. 1.66 km W of Cobb, California · 16421 days ago · 2 km deep · 3 km away
  30. 1.65 km WSW of Cobb, California · 16420 days ago · 0 km deep · 1 km away
  31. 2.27 km WSW of Cobb, California · 16420 days ago · 0 km deep · 3 km away
  32. 1.66 km W of Cobb, California · 16420 days ago · 1 km deep · 4 km away
  33. 1.85 km W of Cobb, California · 16419 days ago · 0 km deep · 4 km away
  34. 3.15 km W of Cobb, California · 16419 days ago · 1 km deep · 4 km away
  35. 2.46 km W of Cobb, California · 16419 days ago · 1 km deep · 4 km away
  36. 3.111 km NE of Hidden Valley Lake, California · 16419 days ago · 11 km deep · 29 km away
  37. 2.09 km ENE of Hidden Valley Lake, California · 16419 days ago · 8 km deep · 27 km away
  38. 1.84 km WSW of Kenwood, California · 16419 days ago · 8 km deep · 46 km away
  39. 1.79 km W of Cobb, California · 16419 days ago · 1 km deep · 6 km away
  40. 1.65 km WSW of Cobb, California · 16418 days ago · 0 km deep · 3 km away
  41. 1.89 km ENE of Hidden Valley Lake, California · 16418 days ago · 7 km deep · 28 km away
  42. 2.84 km E of Geyserville, California · 16418 days ago · 5 km deep · 11 km away
  43. 2.08 km W of Cobb, California · 16417 days ago · 0 km deep · 5 km away
  44. 1.69 km WSW of Cobb, California · 16417 days ago · 3 km deep · 5 km away
  45. 1.84 km E of Geyserville, California · 16417 days ago · 4 km deep · 11 km away
  46. 3.1Northern California · 16417 days ago · 1 km deep · 3 km away
  47. 1.618 km NE of Upper Lake, California · 16417 days ago · 5 km deep · 57 km away
  48. 1.717 km N of Moskowite Corner, California · 16417 days ago · 8 km deep · 53 km away
  49. 2.014 km N of Moskowite Corner, California · 16416 days ago · 0 km deep · 57 km away
  50. 1.94 km WSW of Cobb, California · 16416 days ago · 1 km deep · 1 km away
  51. 1.59 km WSW of Cobb, California · 16416 days ago · 1 km deep · 6 km away
  52. 1.58 km NNE of Cloverdale, California · 16416 days ago · 3 km deep · 20 km away
  53. 1.67 km W of Cobb, California · 16415 days ago · 1 km deep · 4 km away
  54. 1.74 km E of Geyserville, California · 16414 days ago · 5 km deep · 11 km away
  55. 1.69 km WSW of Cobb, California · 16414 days ago · 1 km deep · 5 km away
  56. 1.84 km SSE of Dillon Beach, California · 16414 days ago · 2 km deep · 66 km away
  57. 1.62 km E of Larkfield-Wikiup, California · 16414 days ago · 8 km deep · 31 km away
  58. 1.84 km E of Geyserville, California · 16414 days ago · 3 km deep · 11 km away
  59. 1.55 km SSW of Cobb, California · 16413 days ago · -1 km deep · 3 km away
  60. 1.89 km WSW of Cobb, California · 16411 days ago · 1 km deep · 5 km away

The first 60 of 113.

Before

  1. 2.67 km WSW of Cobb, California · 16434 days ago · 1 km deep · 4 km away
  2. 1.810 km E of Hidden Valley Lake, California · 16434 days ago · 7 km deep · 29 km away
  3. 1.77 km W of Cobb, California · 16434 days ago · 2 km deep · 4 km away
  4. 2.08 km W of Cobb, California · 16434 days ago · 0 km deep · 5 km away
  5. 1.98 km W of Cobb, California · 16434 days ago · 0 km deep · 5 km away
  6. 2.07 km W of Cobb, California · 16435 days ago · 2 km deep · 4 km away
  7. 2.87 km NE of Healdsburg, California · 16435 days ago · 6 km deep · 15 km away
  8. 2.04 km NE of Princeton, California · 16436 days ago · 24 km deep · 100 km away
  9. 1.714 km NNW of Moskowite Corner, California · 16436 days ago · 0 km deep · 50 km away
  10. 2.16 km W of Cobb, California · 16437 days ago · 4 km deep · 4 km away
  11. 2.10 km E of Kelseyville, California · 16437 days ago · 0 km deep · 22 km away
  12. 2.03 km SSW of Geyserville, California · 16437 days ago · 3 km deep · 17 km away
  13. 2.37 km WSW of Cobb, California · 16438 days ago · 4 km deep · 3 km away
  14. 2.03 km WNW of Lower Lake, California · 16440 days ago · 1 km deep · 18 km away
  15. 1.7near the coast of Northern California · 16442 days ago · 6 km deep · 60 km away
  16. 1.64 km WSW of Cobb, California · 16442 days ago · 1 km deep · 1 km away
  17. 1.64 km WSW of Cobb, California · 16443 days ago · 2 km deep · 1 km away
  18. 1.611 km S of Kelseyville, California · 16443 days ago · -1 km deep · 11 km away
  19. 1.84 km S of Cobb, California · 16444 days ago · 2 km deep · 4 km away
  20. 1.5Northern California · 16446 days ago · 1 km deep · 5 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc1067908. Read Tue, Sep 22, 2026, 8:09 PM UTC.