California earthquakes

M2.1 earthquake 9 km WSW of Cobb, California

A magnitude 2.1 earthquake struck 9 km WSW of Cobb, California on Mon, Mar 9, 1981, 7:16 AM PST (15:16 UTC), 1 km (1 mi) below the surface.

A larger quake followed: M3.0 10 km W of Point Arena, 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
2.1 (md), micro
Local time
UTC
1981-03-09 15:16:06 UTC
Depth
1.0 km (0.6 mi), shallow
Epicenter
38.801° N, 122.825° 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, 0.3 km in depth
Magnitude uncertainty
±0.22
Depth from
From location
Station coverage gap
36°
Stations used
30

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 103 in the 60 days after this one and 62 in the 30 days before it.

After

  1. 2.15 km SW of Cobb, California · 16640 days ago · 0 km deep · 5 km away
  2. 1.99 km NW of Redwood Valley, CA · 16640 days ago · 5 km deep · 70 km away
  3. 2.49 km NW of Redwood Valley, California · 16640 days ago · 4 km deep · 70 km away
  4. 1.79 km NW of Redwood Valley, California · 16640 days ago · 5 km deep · 71 km away
  5. 1.69 km NW of Redwood Valley, California · 16640 days ago · 4 km deep · 71 km away
  6. 1.95 km SW of Cobb, California · 16639 days ago · 0 km deep · 5 km away
  7. 1.88 km WSW of Cobb, CA · 16638 days ago · 2 km deep · 2 km away
  8. 2.05 km ENE of Willits, CA · 16638 days ago · 2 km deep · 82 km away
  9. 1.76 km WSW of Cobb, California · 16636 days ago · 0 km deep · 3 km away
  10. 2.07 km WSW of Cobb, California · 16634 days ago · 1 km deep · 2 km away
  11. 1.86 km W of Cobb, California · 16634 days ago · 4 km deep · 3 km away
  12. 1.65 km SW of Cobb, California · 16633 days ago · 1 km deep · 4 km away
  13. 1.710 km NNW of Potter Valley, California · 16633 days ago · 7 km deep · 74 km away
  14. 2.29 km ENE of Hidden Valley Lake, California · 16632 days ago · 8 km deep · 32 km away
  15. 1.610 km E of Hidden Valley Lake, California · 16632 days ago · 7 km deep · 33 km away
  16. 1.96 km W of Cobb, California · 16632 days ago · 3 km deep · 3 km away
  17. 2.08 km W of Cobb, California · 16630 days ago · 1 km deep · 3 km away
  18. 1.88 km W of Cobb, California · 16630 days ago · 1 km deep · 3 km away
  19. 1.59 km W of Cobb, California · 16630 days ago · 1 km deep · 1 km away
  20. 1.79 km WSW of Cobb, California · 16628 days ago · 1 km deep · 0 km away
  21. 2.69 km E of Hidden Valley Lake, California · 16627 days ago · 11 km deep · 33 km away
  22. 2.27 km WSW of Cobb, California · 16627 days ago · 2 km deep · 2 km away
  23. 1.85 km WSW of Cobb, California · 16627 days ago · 0 km deep · 4 km away
  24. 1.77 km WSW of Cobb, California · 16626 days ago · 0 km deep · 1 km away
  25. 1.76 km WSW of Cobb, California · 16626 days ago · 1 km deep · 3 km away
  26. 2.06 km ESE of Roseland, California · 16625 days ago · 8 km deep · 47 km away
  27. 1.76 km WSW of Cobb, California · 16625 days ago · 3 km deep · 3 km away
  28. 2.09 km WSW of Cobb, California · 16624 days ago · 2 km deep · 0 km away
  29. 1.77 km W of Cobb, California · 16624 days ago · 1 km deep · 3 km away
  30. 1.68 km W of Cobb, California · 16624 days ago · 0 km deep · 4 km away
  31. 1.614 km E of Potter Valley, California · 16622 days ago · 6 km deep · 60 km away
  32. 1.63 km NE of Clear Lake Riviera, California · 16620 days ago · -1 km deep · 23 km away
  33. 2.18 km ENE of Hidden Valley Lake, California · 16620 days ago · 7 km deep · 32 km away
  34. 1.62 km NE of Clear Lake Riviera, California · 16620 days ago · 4 km deep · 22 km away
  35. 1.76 km W of Cobb, California · 16619 days ago · 2 km deep · 3 km away
  36. 2.38 km ENE of Hidden Valley Lake, California · 16619 days ago · 8 km deep · 32 km away
  37. 1.77 km WSW of Cobb, California · 16618 days ago · 2 km deep · 1 km away
  38. 3.010 km W of Point Arena, California · 16618 days ago · 7 km deep · 86 km away
  39. 1.86 km WSW of Cobb, California · 16617 days ago · 4 km deep · 2 km away
  40. 2.08 km WSW of Cobb, California · 16616 days ago · 1 km deep · 0 km away
  41. 1.64 km WSW of Cobb, California · 16616 days ago · 1 km deep · 5 km away
  42. 1.89 km W of Cobb, California · 16616 days ago · 1 km deep · 1 km away
  43. 1.66 km WSW of Cobb, California · 16616 days ago · 4 km deep · 3 km away
  44. 1.612 km S of Comptche, California · 16615 days ago · 7 km deep · 77 km away
  45. 1.66 km W of Cobb, California · 16611 days ago · 3 km deep · 3 km away
  46. 1.64 km WSW of Cobb, California · 16611 days ago · 2 km deep · 5 km away
  47. 1.77 km WSW of Cobb, California · 16610 days ago · 1 km deep · 2 km away
  48. 2.1Northern California · 16610 days ago · 3 km deep · 57 km away
  49. 1.92 km SE of Calpella, California · 16610 days ago · 3 km deep · 56 km away
  50. 1.56 km W of Cobb, California · 16610 days ago · 1 km deep · 4 km away
  51. 2.27 km WSW of Cobb, California · 16609 days ago · 2 km deep · 1 km away
  52. 2.76 km W of Cobb, California · 16608 days ago · 3 km deep · 3 km away
  53. 1.96 km W of Cobb, California · 16608 days ago · 4 km deep · 3 km away
  54. 1.76 km WSW of Cobb, California · 16608 days ago · 3 km deep · 2 km away
  55. 2.417 km NE of Nice, California · 16607 days ago · 8 km deep · 50 km away
  56. 1.60 km W of Moskowite Corner, California · 16606 days ago · 16 km deep · 67 km away
  57. 1.9near the coast of Northern California · 16605 days ago · 10 km deep · 87 km away
  58. 1.89 km NE of Brooktrails, California · 16605 days ago · 8 km deep · 87 km away
  59. 2.120 km ENE of Brooktrails, California · 16604 days ago · 8 km deep · 87 km away
  60. 2.36 km WSW of Cobb, California · 16604 days ago · 1 km deep · 3 km away

The first 60 of 103.

Before

  1. 1.67 km W of Cobb, California · 16642 days ago · 2 km deep · 2 km away
  2. 1.53 km E of Clear Lake Riviera, California · 16643 days ago · 1 km deep · 21 km away
  3. 1.53 km WNW of Clearlake, California · 16643 days ago · 2 km deep · 24 km away
  4. 1.73 km W of Clearlake, California · 16643 days ago · 2 km deep · 22 km away
  5. 2.03 km W of Clearlake, California · 16643 days ago · 0 km deep · 22 km away
  6. 2.67 km WSW of Cobb, California · 16643 days ago · 1 km deep · 2 km away
  7. 1.63 km W of Clearlake, California · 16643 days ago · 0 km deep · 22 km away
  8. 1.63 km W of Clearlake, California · 16643 days ago · 4 km deep · 22 km away
  9. 1.86 km W of Cobb, California · 16644 days ago · 2 km deep · 3 km away
  10. 1.93 km NNW of Redwood Valley, California · 16644 days ago · 6 km deep · 65 km away
  11. 2.1Northern California · 16645 days ago · -1 km deep · 0 km away
  12. 1.65 km SW of Cobb, California · 16645 days ago · 0 km deep · 5 km away
  13. 1.54 km WSW of Cobb, California · 16646 days ago · 4 km deep · 5 km away
  14. 2.64 km WSW of Cobb, California · 16646 days ago · 2 km deep · 5 km away
  15. 1.77 km NE of Hidden Valley Lake, California · 16647 days ago · 7 km deep · 29 km away
  16. 1.76 km WSW of Cobb, California · 16647 days ago · 0 km deep · 3 km away
  17. 2.18 km NE of Hidden Valley Lake, California · 16647 days ago · 8 km deep · 30 km away
  18. 1.96 km N of Cloverdale, California · 16647 days ago · 5 km deep · 17 km away
  19. 1.76 km W of Cobb, California · 16647 days ago · 3 km deep · 3 km away
  20. 1.82 km SW of Moskowite Corner, California · 16648 days ago · 8 km deep · 67 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc1061185. Read Wed, Sep 30, 2026, 6:50 AM UTC.