California earthquakes

M1.8 earthquake 8 km W of Cobb, California

A magnitude 1.8 earthquake struck 8 km W of Cobb, California on Tue, Sep 21, 1982, 1:16 AM PDT (08:16 UTC), 1 km (0 mi) below the surface.

A larger quake followed: M3.3 5 km WSW of Cobb, 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
1.8 (md), micro
Local time
UTC
1982-09-21 08:16:08 UTC
Depth
0.6 km (0.4 mi), shallow
Epicenter
38.836° N, 122.820° 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 1.4 km horizontally, 7.0 km in depth
Magnitude uncertainty
±0.16
Depth from
From location
Station coverage gap
212°, poorly surrounded by stations
Stations used
8

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 110 in the 60 days after this one and 54 in the 30 days before it.

After

  1. 2.39 km ESE of Hidden Valley Lake, California · 16076 days ago · 7 km deep · 32 km away
  2. 2.513 km ESE of Hidden Valley Lake, California · 16075 days ago · -1 km deep · 36 km away
  3. 2.110 km ESE of Hidden Valley Lake, California · 16075 days ago · 7 km deep · 34 km away
  4. 1.54 km S of Cobb, California · 16074 days ago · -1 km deep · 10 km away
  5. 1.824 km SE of Covelo, California · 16074 days ago · 6 km deep · 89 km away
  6. 2.024 km SE of Covelo, California · 16074 days ago · 6 km deep · 89 km away
  7. 2.124 km SE of Covelo, California · 16074 days ago · 6 km deep · 90 km away
  8. 1.823 km SE of Covelo, California · 16074 days ago · 0 km deep · 91 km away
  9. 2.024 km SE of Covelo, California · 16074 days ago · 4 km deep · 89 km away
  10. 1.724 km SE of Covelo, California · 16074 days ago · 6 km deep · 90 km away
  11. 1.84 km WSW of Moskowite Corner, California · 16073 days ago · 9 km deep · 67 km away
  12. 1.517 km ENE of Potter Valley, California · 16071 days ago · 10 km deep · 61 km away
  13. 3.25 km WSW of Cobb, California · 16071 days ago · 1 km deep · 5 km away
  14. 1.87 km W of Calistoga, California · 16070 days ago · 7 km deep · 31 km away
  15. 1.76 km ENE of Willits, California · 16068 days ago · 3 km deep · 78 km away
  16. 2.714 km NW of Brooktrails, California · 16068 days ago · 6 km deep · 98 km away
  17. 1.88 km WSW of Cobb, California · 16067 days ago · 0 km deep · 4 km away
  18. 1.98 km WSW of Cobb, California · 16064 days ago · 0 km deep · 4 km away
  19. 1.916 km NE of Upper Lake, California · 16064 days ago · 5 km deep · 50 km away
  20. 1.94 km S of Cobb, California · 16063 days ago · 0 km deep · 10 km away
  21. 1.69 km WSW of Cobb, California · 16062 days ago · 0 km deep · 5 km away
  22. 1.56 km WSW of Cobb, California · 16062 days ago · 1 km deep · 5 km away
  23. 1.510 km S of Kelseyville, California · 16061 days ago · 1 km deep · 5 km away
  24. 1.58 km WSW of Cobb, California · 16061 days ago · 0 km deep · 4 km away
  25. 1.88 km ESE of Hidden Valley Lake, California · 16061 days ago · 8 km deep · 31 km away
  26. 2.17 km WSW of Cobb, California · 16061 days ago · 4 km deep · 3 km away
  27. 1.712 km NE of Upper Lake, California · 16060 days ago · 0 km deep · 44 km away
  28. 1.811 km SSW of Hopland, California · 16060 days ago · 19 km deep · 30 km away
  29. 1.68 km ESE of Hidden Valley Lake, California · 16060 days ago · 7 km deep · 31 km away
  30. 1.56 km W of Cobb, California · 16055 days ago · 2 km deep · 2 km away
  31. 2.36 km NE of Hopland, California · 16054 days ago · 2 km deep · 29 km away
  32. 1.94 km N of Kenwood, California · 16054 days ago · 5 km deep · 49 km away
  33. 1.67 km W of Cobb, California · 16054 days ago · 2 km deep · 2 km away
  34. 1.79 km SW of Clear Lake Riviera, California · 16052 days ago · -1 km deep · 6 km away
  35. 1.96 km ESE of Roseland, California · 16052 days ago · 9 km deep · 51 km away
  36. 1.55 km WSW of Hopland, California · 16050 days ago · 3 km deep · 32 km away
  37. 1.56 km W of Cobb, California · 16050 days ago · 2 km deep · 3 km away
  38. 1.86 km WSW of Cobb, California · 16049 days ago · 3 km deep · 4 km away
  39. 2.94 km WSW of Cobb, California · 16049 days ago · 1 km deep · 6 km away
  40. 2.44 km WSW of Cobb, California · 16049 days ago · 1 km deep · 6 km away
  41. 1.78 km WSW of Cobb, California · 16049 days ago · 0 km deep · 5 km away
  42. 1.66 km WSW of Eldridge, California · 16049 days ago · 8 km deep · 61 km away
  43. 2.22 km N of Elk Creek, California · 16048 days ago · 14 km deep · 92 km away
  44. 1.821 km NNE of Potter Valley, California · 16048 days ago · 7 km deep · 75 km away
  45. 1.67 km WSW of Cobb, California · 16048 days ago · 3 km deep · 4 km away
  46. 2.08 km ESE of Willits, California · 16048 days ago · 2 km deep · 71 km away
  47. 2.2near the coast of Northern California · 16048 days ago · 7 km deep · 75 km away
  48. 1.66 km S of Calistoga, California · 16047 days ago · 6 km deep · 41 km away
  49. 1.76 km E of Geyserville, California · 16047 days ago · 6 km deep · 13 km away
  50. 2.08 km WSW of Cobb, California · 16047 days ago · 0 km deep · 5 km away
  51. 1.624 km SE of Covelo, California · 16046 days ago · 5 km deep · 90 km away
  52. 1.94 km WSW of Cobb, California · 16046 days ago · 1 km deep · 5 km away
  53. 2.06 km W of Cobb, California · 16046 days ago · 2 km deep · 2 km away
  54. 1.56 km W of Cobb, California · 16046 days ago · -1 km deep · 3 km away
  55. 1.66 km W of Cobb, California · 16044 days ago · 1 km deep · 2 km away
  56. 2.34 km S of Cobb, California · 16044 days ago · 2 km deep · 11 km away
  57. 1.518 km ENE of Potter Valley, California · 16043 days ago · 4 km deep · 61 km away
  58. 1.74 km S of Cobb, California · 16043 days ago · 0 km deep · 10 km away
  59. 1.710 km ESE of Hidden Valley Lake, California · 16043 days ago · 6 km deep · 33 km away
  60. 2.02 km SW of Geyserville, California · 16043 days ago · -1 km deep · 18 km away

The first 60 of 110.

Before

  1. 1.88 km ESE of Hidden Valley Lake, California · 16078 days ago · 7 km deep · 31 km away
  2. 2.28 km W of Calistoga, California · 16079 days ago · 6 km deep · 30 km away
  3. 2.15 km WSW of Cobb, California · 16079 days ago · 0 km deep · 5 km away
  4. 1.82 km ENE of Inverness, California · 16080 days ago · 2 km deep · 80 km away
  5. 2.06 km WSW of Cobb, California · 16080 days ago · 6 km deep · 6 km away
  6. 1.75 km SW of Cobb, California · 16080 days ago · 1 km deep · 6 km away
  7. 1.97 km W of Cobb, California · 16081 days ago · -1 km deep · 2 km away
  8. 2.46 km W of Cobb, California · 16081 days ago · -1 km deep · 2 km away
  9. 2.36 km SSE of Cobb, California · 16081 days ago · 1 km deep · 13 km away
  10. 1.82 km SE of Larkfield-Wikiup, California · 16082 days ago · 5 km deep · 38 km away
  11. 1.925 km SE of Covelo, California · 16082 days ago · 6 km deep · 89 km away
  12. 2.77 km W of Cobb, California · 16082 days ago · 1 km deep · 2 km away
  13. 3.025 km SE of Covelo, California · 16082 days ago · 8 km deep · 89 km away
  14. 3.025 km SE of Covelo, California · 16082 days ago · 7 km deep · 89 km away
  15. 1.913 km WSW of Arbuckle, California · 16085 days ago · 5 km deep · 56 km away
  16. 1.66 km W of Cobb, California · 16085 days ago · 2 km deep · 3 km away
  17. 1.912 km WSW of Hopland, California · 16085 days ago · 6 km deep · 38 km away
  18. 1.910 km SW of Arbuckle, California · 16086 days ago · 4 km deep · 61 km away
  19. 2.210 km SW of Arbuckle, California · 16086 days ago · 7 km deep · 61 km away
  20. 1.69 km SW of Clear Lake Riviera, California · 16087 days ago · -1 km deep · 7 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc1079253. Read Sun, Sep 27, 2026, 10:28 PM UTC.