M3.0 earthquake 6 km WSW of Cobb, California

Magnitude

3.0 (md), micro

Local time

Tue, Jul 28, 1981, 2:37 AM PDT

UTC

1981-07-28 09:37:34 UTC

Depth

3.8 km (2.3 mi), shallow

Epicenter

38.810° N, 122.795° W

Region

California

Tsunami flag

No

Status

Reviewed by a seismologist

Location uncertainty

About 0.1 km horizontally, 0.2 km in depth

Magnitude uncertainty

±0.21

Depth from

From location

Station coverage gap

38°

Stations used

37

• Cobb, CaliforniaPopulation 1,778. Forecast6 kmWSW
• Clearlake, CaliforniaPopulation 15,182. Forecast22 kmSW
• Santa Rosa, CaliforniaPopulation 178,127. Forecast42 kmN
• Los Angeles, CaliforniaPopulation 3,820,914. Forecast667 kmNW

After

1. 1.86 km WSW of Cobb, CaliforniaTue, Jul 28, 4:59 AM PDT · 16493 days ago · 0 km deep · 1 km away
2. 2.45 km WSW of Cobb, CaliforniaTue, Jul 28, 5:26 AM PDT · 16493 days ago · 1 km deep · 1 km away
3. 1.56 km WSW of Cobb, CaliforniaTue, Jul 28, 5:46 AM PDT · 16493 days ago · 0 km deep · 1 km away
4. 2.322 km WNW of Elk Creek, CaliforniaTue, Jul 28, 10:40 PM PDT · 16492 days ago · 7 km deep · 94 km away
5. 1.76 km WSW of Cobb, CaliforniaWed, Jul 29, 3:31 AM PDT · 16492 days ago · 3 km deep · 0 km away
6. 2.22 km ENE of Windsor, CaliforniaWed, Jul 29, 7:26 AM PDT · 16492 days ago · 1 km deep · 28 km away
7. 1.54 km SSE of Potter Valley, CaliforniaWed, Jul 29, 11:50 PM PDT · 16491 days ago · 10 km deep · 59 km away
8. 1.59 km WSW of Cobb, CaliforniaThu, Jul 30, 3:38 AM PDT · 16491 days ago · 2 km deep · 3 km away
9. 2.522 km NE of Potter Valley, CaliforniaThu, Jul 30, 4:51 AM PDT · 16491 days ago · 12 km deep · 74 km away
10. 1.86 km W of Cobb, CaliforniaThu, Jul 30, 10:12 AM PDT · 16490 days ago · 0 km deep · 2 km away
11. 1.95 km SW of Cobb, CaliforniaFri, Jul 31, 5:52 AM PDT · 16490 days ago · 0 km deep · 3 km away
12. 2.65 km SW of Cobb, CaliforniaFri, Jul 31, 5:56 AM PDT · 16490 days ago · 1 km deep · 3 km away
13. 1.55 km SW of Cobb, CaliforniaFri, Jul 31, 7:33 AM PDT · 16490 days ago · -1 km deep · 3 km away
14. 1.66 km W of Cobb, CaliforniaFri, Jul 31, 11:19 AM PDT · 16489 days ago · 3 km deep · 1 km away
15. 1.66 km W of Cobb, CaliforniaFri, Jul 31, 2:15 PM PDT · 16489 days ago · 3 km deep · 1 km away
16. 1.99 km NW of Redwood Valley, CaliforniaSun, Aug 2, 8:18 PM PDT · 16487 days ago · 5 km deep · 71 km away
17. 1.96 km SSW of Green Valley, CaliforniaTue, Aug 4, 8:55 PM PDT · 16485 days ago · 8 km deep · 87 km away
18. 2.07 km WSW of Cobb, CaliforniaTue, Aug 4, 10:35 PM PDT · 16485 days ago · 0 km deep · 1 km away
19. 1.79 km WSW of Cobb, CaliforniaTue, Aug 4, 11:28 PM PDT · 16485 days ago · 2 km deep · 3 km away
20. 1.713 km NNE of Angwin, CaliforniaSat, Aug 8, 11:41 PM PDT · 16481 days ago · 9 km deep · 37 km away
21. 1.76 km W of Cobb, CaliforniaSun, Aug 9, 3:25 AM PDT · 16481 days ago · 3 km deep · 0 km away
22. 2.04 km WSW of Cobb, CaliforniaSun, Aug 9, 9:04 AM PDT · 16480 days ago · 4 km deep · 2 km away
23. 1.66 km ESE of Talmage, CaliforniaSun, Aug 9, 2:31 PM PDT · 16480 days ago · 8 km deep · 43 km away
24. 2.17 km WSW of Cobb, CaliforniaSun, Aug 9, 2:59 PM PDT · 16480 days ago · 4 km deep · 1 km away
25. 1.82 km WNW of Cobb, CaliforniaMon, Aug 10, 4:37 AM PDT · 16480 days ago · 0 km deep · 4 km away
26. 1.78 km WSW of Cobb, CaliforniaTue, Aug 11, 4:22 PM PDT · 16478 days ago · 1 km deep · 2 km away
27. 1.76 km E of Suisun, CaliforniaTue, Aug 11, 8:28 PM PDT · 16478 days ago · 5 km deep · 96 km away
28. 1.77 km E of Fairfield, CaliforniaTue, Aug 11, 9:17 PM PDT · 16478 days ago · 5 km deep · 97 km away
29. 2.110 km N of Moskowite Corner, CaliforniaWed, Aug 12, 2:23 AM PDT · 16478 days ago · 7 km deep · 61 km away
30. 1.57 km W of Cobb, CaliforniaWed, Aug 12, 11:11 AM PDT · 16477 days ago · 1 km deep · 2 km away
31. 2.67 km W of Cobb, CaliforniaWed, Aug 12, 11:11 AM PDT · 16477 days ago · 1 km deep · 2 km away
32. 1.78 km W of Cobb, CaliforniaWed, Aug 12, 11:32 AM PDT · 16477 days ago · 1 km deep · 2 km away
33. 1.69 km WSW of Cobb, CaliforniaWed, Aug 12, 3:10 PM PDT · 16477 days ago · 2 km deep · 3 km away
34. 1.69 km WSW of Cobb, CaliforniaWed, Aug 12, 3:11 PM PDT · 16477 days ago · 2 km deep · 3 km away
35. 1.610 km ESE of Willits, CaliforniaFri, Aug 14, 12:00 AM PDT · 16476 days ago · 6 km deep · 75 km away
36. 1.54 km WNW of Potter Valley, CaliforniaFri, Aug 14, 5:16 AM PDT · 16476 days ago · 9 km deep · 67 km away
37. 2.09 km WSW of Cobb, CaliforniaFri, Aug 14, 5:18 PM PDT · 16475 days ago · 2 km deep · 3 km away
38. 2.53 km NNW of Larkfield-Wikiup, CaliforniaFri, Aug 14, 7:23 PM PDT · 16475 days ago · 2 km deep · 30 km away
39. 1.76 km W of Cobb, CaliforniaSat, Aug 15, 12:21 AM PDT · 16475 days ago · 4 km deep · 1 km away
40. 1.69 km NE of Comptche, CaliforniaSat, Aug 15, 10:29 AM PDT · 16474 days ago · 5 km deep · 85 km away
41. 2.11 km WSW of Geyserville, CaliforniaSun, Aug 16, 4:24 AM PDT · 16474 days ago · 5 km deep · 16 km away
42. 1.74 km S of Cobb, CaliforniaSun, Aug 16, 12:25 PM PDT · 16473 days ago · 1 km deep · 7 km away
43. 1.67 km NNW of Redwood Valley, CaliforniaSun, Aug 16, 12:28 PM PDT · 16473 days ago · 4 km deep · 69 km away
44. 2.17 km W of Cobb, CaliforniaSun, Aug 16, 7:05 PM PDT · 16473 days ago · 4 km deep · 1 km away
45. 1.54 km WNW of Potter Valley, CaliforniaMon, Aug 17, 4:12 AM PDT · 16473 days ago · -1 km deep · 67 km away
46. 1.93 km NNW of Larkfield-Wikiup, CaliforniaMon, Aug 17, 9:01 PM PDT · 16472 days ago · 3 km deep · 30 km away
47. 2.27 km W of Cobb, CaliforniaMon, Aug 17, 11:26 PM PDT · 16472 days ago · 4 km deep · 1 km away
48. 1.74 km S of Cobb, CaliforniaWed, Aug 19, 3:20 AM PDT · 16471 days ago · 1 km deep · 7 km away
49. 1.8near the coast of Northern CaliforniaThu, Aug 20, 1:25 PM PDT · 16469 days ago · 5 km deep · 57 km away
50. 2.49 km WSW of Cobb, CaliforniaFri, Aug 21, 6:52 AM PDT · 16469 days ago · 1 km deep · 3 km away
51. 2.78 km WSW of Cobb, CaliforniaSat, Aug 22, 12:39 AM PDT · 16468 days ago · 2 km deep · 3 km away
52. 1.79 km WSW of Cobb, CaliforniaSat, Aug 22, 12:42 AM PDT · 16468 days ago · 3 km deep · 3 km away
53. 1.59 km WSW of Cobb, CaliforniaSat, Aug 22, 1:02 AM PDT · 16468 days ago · 3 km deep · 3 km away
54. 3.26 km W of Cobb, CaliforniaSat, Aug 22, 5:30 AM PDT · 16468 days ago · 4 km deep · 1 km away
55. 1.810 km W of Cobb, CaliforniaSat, Aug 22, 3:50 PM PDT · 16467 days ago · -1 km deep · 4 km away
56. 1.56 km W of Cobb, CaliforniaSun, Aug 23, 3:41 AM PDT · 16467 days ago · 1 km deep · 0 km away
57. 1.711 km WNW of Cobb, CaliforniaSun, Aug 23, 3:55 AM PDT · 16467 days ago · 1 km deep · 6 km away
58. 1.66 km WSW of Cobb, CaliforniaMon, Aug 24, 4:12 AM PDT · 16466 days ago · 4 km deep · 1 km away
59. 1.66 km WSW of Cobb, CaliforniaMon, Aug 24, 4:13 AM PDT · 16466 days ago · 3 km deep · 1 km away
60. 2.17 km WSW of Cobb, CaliforniaMon, Aug 24, 8:34 PM PDT · 16465 days ago · 0 km deep · 2 km away

The first 60 of 107.

Before

1. 1.96 km WSW of Cobb, CaliforniaTue, Jul 28, 1:45 AM PDT · 16493 days ago · 3 km deep · 0 km away
2. 1.66 km WSW of Cobb, CaliforniaMon, Jul 27, 4:56 PM PDT · 16493 days ago · 0 km deep · 2 km away
3. 1.8Northern CaliforniaMon, Jul 27, 5:37 AM PDT · 16494 days ago · 2 km deep · 3 km away
4. 1.87 km WSW of Cobb, CaliforniaSat, Jul 25, 4:12 PM PDT · 16495 days ago · 1 km deep · 1 km away
5. 2.210 km ESE of Potter Valley, CaliforniaSat, Jul 25, 12:23 AM PDT · 16496 days ago · -1 km deep · 56 km away
6. 2.56 km SSE of Dunnigan, CaliforniaFri, Jul 24, 7:12 PM PDT · 16496 days ago · 10 km deep · 74 km away
7. 1.69 km WSW of Cobb, CaliforniaFri, Jul 24, 7:02 PM PDT · 16496 days ago · 1 km deep · 3 km away
8. 2.04 km WSW of Cobb, CaliforniaFri, Jul 24, 6:46 PM PDT · 16496 days ago · 2 km deep · 2 km away
9. 1.67 km E of Willits, CaliforniaWed, Jul 22, 5:33 PM PDT · 16498 days ago · 8 km deep · 78 km away
10. 2.04 km ESE of Calpella, CaliforniaWed, Jul 22, 10:50 AM PDT · 16498 days ago · 6 km deep · 55 km away
11. 1.56 km W of Cobb, CaliforniaWed, Jul 22, 7:56 AM PDT · 16499 days ago · 2 km deep · 1 km away
12. 1.76 km W of Cobb, CaliforniaWed, Jul 22, 2:19 AM PDT · 16499 days ago · 3 km deep · 1 km away
13. 1.96 km W of Cobb, CaliforniaWed, Jul 22, 1:28 AM PDT · 16499 days ago · 3 km deep · 1 km away
14. 1.55 km WSW of Cobb, CaliforniaTue, Jul 21, 7:54 PM PDT · 16499 days ago · 4 km deep · 2 km away
15. 2.07 km E of Larkfield-Wikiup, CaliforniaTue, Jul 21, 5:26 PM PDT · 16499 days ago · 5 km deep · 33 km away
16. 1.97 km WSW of Cobb, CaliforniaTue, Jul 21, 3:40 PM PDT · 16499 days ago · 2 km deep · 1 km away
17. 2.17 km W of Cobb, CaliforniaSun, Jul 19, 9:37 PM PDT · 16501 days ago · 4 km deep · 1 km away
18. 1.85 km WSW of Kenwood, CaliforniaSun, Jul 19, 2:42 PM PDT · 16501 days ago · 8 km deep · 49 km away
19. 2.04 km WSW of Cobb, CaliforniaSun, Jul 19, 9:42 AM PDT · 16501 days ago · 1 km deep · 2 km away
20. 1.99 km WSW of Cobb, CaliforniaSat, Jul 18, 2:08 AM PDT · 16503 days ago · 1 km deep · 3 km away

From the USGS Earthquake Hazards Program and its partner networks, event nc1066024. Read Wed, Sep 23, 2026, 3:21 AM UTC.