California earthquakes

M2.1 earthquake 4 km SW of Clearlake, California

A magnitude 2.1 earthquake struck 4 km SW of Clearlake, California on Thu, Nov 9, 1978, 11:09 PM PST (07:09 UTC), 0 km (0 mi) below the surface.

A larger quake followed: M3.8 24 km NE of Potter Valley, California. This one was a foreshock.

Clearlake forecastMore in California

Map

Where this earthquake was located, with the others nearby. Select one for its page.

Open the live map with earthquakes

The earthquake

Magnitude
2.1 (Md, duration), micro
Magnitude from
Northern California Seismic System
Local time
UTC
1978-11-10 07:09:06 UTC
Depth
0.3 km (0.2 mi), shallow
Epicenter
38.929° N, 122.660° 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, 1.7 km in depth
Magnitude uncertainty
±0.16
Depth from
From location
Station coverage gap
80°
Stations used
19

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 81 in the 60 days after this one and 33 in the 30 days before it.

After

  1. 2.38 km WSW of Cobb, California · 17495 days ago · 4 km deep · 19 km away
  2. 1.77 km W of Cobb, California · 17495 days ago · 4 km deep · 18 km away
  3. 1.66 km W of Cobb, California · 17494 days ago · 3 km deep · 17 km away
  4. 3.824 km NE of Potter Valley, California · 17493 days ago · 18 km deep · 68 km away
  5. 2.119 km NE of Potter Valley, California · 17493 days ago · 4 km deep · 65 km away
  6. 2.024 km NE of Potter Valley, California · 17493 days ago · 11 km deep · 67 km away
  7. 1.827 km NE of Potter Valley, California · 17493 days ago · 15 km deep · 70 km away
  8. 2.425 km NE of Potter Valley, California · 17493 days ago · 13 km deep · 69 km away
  9. 1.725 km NE of Potter Valley, California · 17493 days ago · 13 km deep · 68 km away
  10. 1.65 km W of Cobb, California · 17492 days ago · 1 km deep · 16 km away
  11. 1.66 km W of Cobb, California · 17490 days ago · 3 km deep · 17 km away
  12. 1.85 km SSW of Saint Helena, California · 17488 days ago · 5 km deep · 54 km away
  13. 2.112 km SSW of Dillon Beach, California · 17487 days ago · 2 km deep · 92 km away
  14. 2.46 km WSW of Cobb, California · 17486 days ago · 3 km deep · 18 km away
  15. 1.82 km SE of Calpella, California · 17485 days ago · 2 km deep · 55 km away
  16. 1.83 km SE of Calpella, California · 17485 days ago · 3 km deep · 55 km away
  17. 1.610 km W of Cobb, California · 17483 days ago · 0 km deep · 20 km away
  18. 2.19 km SE of Willits, California · 17483 days ago · 9 km deep · 71 km away
  19. 3.37 km NNW of Redwood Valley, California · 17483 days ago · 13 km deep · 67 km away
  20. 1.57 km WSW of Cobb, California · 17483 days ago · 4 km deep · 19 km away
  21. 1.56 km W of Cobb, California · 17482 days ago · 4 km deep · 18 km away
  22. 1.98 km W of Cobb, California · 17481 days ago · 1 km deep · 19 km away
  23. 2.28 km W of Cobb, California · 17481 days ago · 0 km deep · 19 km away
  24. 1.68 km W of Cobb, California · 17481 days ago · 0 km deep · 19 km away
  25. 1.810 km SE of Willits, California · 17479 days ago · 10 km deep · 70 km away
  26. 2.0near the coast of Northern California · 17479 days ago · 4 km deep · 54 km away
  27. 1.78 km W of Cobb, California · 17478 days ago · 1 km deep · 19 km away
  28. 2.17 km W of Cobb, California · 17477 days ago · 1 km deep · 18 km away
  29. 2.113 km ESE of Hidden Valley Lake, California · 17475 days ago · 8 km deep · 29 km away
  30. 2.610 km NNE of Brooktrails, California · 17475 days ago · 8 km deep · 88 km away
  31. 2.212 km ESE of Hidden Valley Lake, California · 17474 days ago · 10 km deep · 27 km away
  32. 1.96 km ESE of Hopland, California · 17474 days ago · 4 km deep · 34 km away
  33. 1.817 km ENE of Potter Valley, California · 17474 days ago · 5 km deep · 53 km away
  34. 2.26 km W of Cobb, California · 17473 days ago · 3 km deep · 17 km away
  35. 1.74 km WNW of Redwood Valley, California · 17472 days ago · 7 km deep · 64 km away
  36. 1.76 km NE of Rohnert Park, California · 17472 days ago · 8 km deep · 60 km away
  37. 1.76 km WSW of Cobb, California · 17471 days ago · 0 km deep · 18 km away
  38. 2.57 km W of Cobb, California · 17471 days ago · 3 km deep · 18 km away
  39. 2.57 km W of Cobb, California · 17470 days ago · 3 km deep · 18 km away
  40. 1.69 km W of Cobb, California · 17470 days ago · 0 km deep · 19 km away
  41. 2.39 km WSW of Cobb, California · 17470 days ago · 1 km deep · 20 km away
  42. 1.56 km W of Cobb, California · 17467 days ago · 3 km deep · 17 km away
  43. 2.112 km ESE of Hidden Valley Lake, California · 17467 days ago · 8 km deep · 27 km away
  44. 1.512 km ESE of Hidden Valley Lake, California · 17467 days ago · 8 km deep · 27 km away
  45. 1.811 km ESE of Willits, California · 17467 days ago · 4 km deep · 70 km away
  46. 1.64 km E of Saint Helena, California · 17467 days ago · 5 km deep · 52 km away
  47. 1.96 km W of Cobb, California · 17466 days ago · 0 km deep · 16 km away
  48. 3.46 km WSW of Cobb, California · 17466 days ago · 0 km deep · 18 km away
  49. 1.7Northern California · 17466 days ago · 18 km deep · 29 km away
  50. 2.0Northern California · 17465 days ago · 8 km deep · 27 km away
  51. 1.77 km W of Cobb, California · 17465 days ago · -1 km deep · 17 km away
  52. 2.110 km SE of Sonoma, California · 17464 days ago · 7 km deep · 83 km away
  53. 1.810 km SE of Hopland, California · 17463 days ago · 2 km deep · 31 km away
  54. 1.912 km ESE of Hidden Valley Lake, California · 17462 days ago · 8 km deep · 27 km away
  55. 1.67 km W of Richvale, California · 17462 days ago · 9 km deep · 94 km away
  56. 3.26 km W of Cobb, California · 17461 days ago · 4 km deep · 17 km away
  57. 1.56 km W of Cobb, California · 17460 days ago · 3 km deep · 17 km away
  58. 1.611 km ESE of Willits, California · 17460 days ago · 4 km deep · 70 km away
  59. 2.33 km SE of Calpella, California · 17457 days ago · 6 km deep · 55 km away
  60. 1.75 km W of Cobb, California · 17457 days ago · 0 km deep · 16 km away

The first 60 of 81.

Before

  1. 2.34 km SW of Clearlake, California · 17496 days ago · 2 km deep · 0 km away
  2. 1.57 km WSW of Cobb, California · 17498 days ago · 1 km deep · 19 km away
  3. 2.326 km NE of Potter Valley, California · 17498 days ago · 14 km deep · 70 km away
  4. 1.89 km E of Willits, California · 17498 days ago · 8 km deep · 72 km away
  5. 2.610 km NNW of Potter Valley, California · 17499 days ago · 3 km deep · 68 km away
  6. 2.411 km NNW of Potter Valley, California · 17499 days ago · 4 km deep · 69 km away
  7. 2.16 km W of Cobb, California · 17503 days ago · 2 km deep · 16 km away
  8. 1.73 km SE of Calpella, California · 17503 days ago · 2 km deep · 55 km away
  9. 2.513 km WNW of Brooktrails, California · 17506 days ago · 12 km deep · 98 km away
  10. 2.16 km NE of Willits, California · 17508 days ago · 5 km deep · 80 km away
  11. 2.612 km ESE of Hidden Valley Lake, California · 17508 days ago · 7 km deep · 28 km away
  12. 1.87 km SW of Calistoga, California · 17508 days ago · 5 km deep · 45 km away
  13. 2.16 km WSW of Cobb, California · 17509 days ago · 0 km deep · 18 km away
  14. 2.08 km E of Willits, California · 17509 days ago · 10 km deep · 74 km away
  15. 1.716 km ESE of Hidden Valley Lake, California · 17509 days ago · 8 km deep · 32 km away
  16. 1.616 km ESE of Hidden Valley Lake, California · 17512 days ago · 5 km deep · 32 km away
  17. 2.512 km N of Brooktrails, California · 17512 days ago · -1 km deep · 93 km away
  18. 2.09 km E of Moskowite Corner, California · 17513 days ago · 14 km deep · 75 km away
  19. 1.87 km W of Cobb, California · 17514 days ago · 3 km deep · 17 km away
  20. 2.17 km WSW of Cobb, California · 17514 days ago · 0 km deep · 18 km away

Earthquakes todayCalifornia earthquakesLive radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc1043300. Read Sun, Oct 4, 2026, 4:33 PM UTC.