M1.6 earthquake 4 km S of Cobb, California

Magnitude

1.6 (md), micro

Local time

Tue, Dec 10, 1985, 10:20 PM PST

UTC

1985-12-11 06:20:09 UTC

Depth

1.3 km (0.8 mi), shallow

Epicenter

38.781° N, 122.723° W

Region

California

Tsunami flag

No

Status

Reviewed by a seismologist

Location uncertainty

About 0.3 km horizontally, 0.5 km in depth

Magnitude uncertainty

±0.11

Depth from

From location

Station coverage gap

102°

Stations used

11

• Cobb, CaliforniaPopulation 1,778. Forecast5 kmS
• Clearlake, CaliforniaPopulation 15,182. Forecast21 kmSSW
• Santa Rosa, CaliforniaPopulation 178,127. Forecast38 kmN
• Los Angeles, CaliforniaPopulation 3,820,914. Forecast661 kmNW

After

1. 1.722 km ENE of Potter Valley, CaliforniaTue, Dec 24, 1:15 AM PST · 14883 days ago · 10 km deep · 70 km away
2. 1.56 km W of Cobb, CaliforniaTue, Dec 24, 7:55 PM PST · 14882 days ago · 3 km deep · 8 km away
3. 1.77 km WSW of Cobb, CaliforniaTue, Dec 24, 8:32 PM PST · 14882 days ago · 1 km deep · 8 km away
4. 1.85 km W of Cobb, CaliforniaTue, Dec 24, 8:45 PM PST · 14882 days ago · -1 km deep · 7 km away
5. 1.97 km W of Cobb, CaliforniaWed, Dec 25, 7:48 AM PST · 14881 days ago · 1 km deep · 9 km away
6. 1.84 km SSW of Hopland, CaliforniaWed, Dec 25, 2:03 PM PST · 14881 days ago · 6 km deep · 40 km away
7. 1.910 km NNE of Brooktrails, CaliforniaThu, Dec 26, 2:22 AM PST · 14880 days ago · 8 km deep · 99 km away
8. 1.56 km W of Cobb, CaliforniaThu, Dec 26, 3:07 AM PST · 14880 days ago · 3 km deep · 8 km away
9. 1.84 km WSW of Cobb, CaliforniaThu, Dec 26, 4:14 AM PST · 14880 days ago · 1 km deep · 5 km away
10. 1.55 km WSW of Cobb, CaliforniaThu, Dec 26, 6:37 AM PST · 14880 days ago · 0 km deep · 5 km away
11. 1.64 km SSW of Hopland, CaliforniaThu, Dec 26, 5:23 PM PST · 14880 days ago · 6 km deep · 40 km away
12. 2.14 km SSW of Hopland, CaliforniaThu, Dec 26, 6:06 PM PST · 14880 days ago · 6 km deep · 40 km away
13. 2.09 km WSW of Cobb, CaliforniaFri, Dec 27, 1:15 AM PST · 14880 days ago · 2 km deep · 9 km away
14. 1.75 km W of Cobb, CaliforniaFri, Dec 27, 2:45 AM PST · 14879 days ago · 1 km deep · 7 km away
15. 1.99 km ENE of Hidden Valley Lake, CaliforniaFri, Dec 27, 5:06 AM PST · 14879 days ago · 9 km deep · 24 km away
16. 2.35 km SW of Cobb, CaliforniaFri, Dec 27, 12:34 PM PST · 14879 days ago · 0 km deep · 3 km away
17. 1.57 km WSW of Cobb, CaliforniaFri, Dec 27, 1:07 PM PST · 14879 days ago · 2 km deep · 8 km away
18. 2.34 km W of Cobb, CaliforniaSat, Dec 28, 1:29 PM PST · 14878 days ago · 0 km deep · 7 km away
19. 1.94 km W of Cobb, CaliforniaSat, Dec 28, 1:29 PM PST · 14878 days ago · 1 km deep · 7 km away
20. 1.64 km W of Cobb, CaliforniaSat, Dec 28, 1:30 PM PST · 14878 days ago · -1 km deep · 6 km away
21. 2.65 km SW of Cobb, CaliforniaSat, Dec 28, 2:26 PM PST · 14878 days ago · 0 km deep · 4 km away
22. 1.55 km SW of Cobb, CaliforniaSat, Dec 28, 2:32 PM PST · 14878 days ago · 0 km deep · 4 km away
23. 1.66 km WNW of Cobb, CaliforniaSat, Dec 28, 9:53 PM PST · 14878 days ago · 1 km deep · 9 km away
24. 1.57 km W of Cobb, CaliforniaSat, Dec 28, 11:31 PM PST · 14878 days ago · 2 km deep · 9 km away
25. 1.65 km SW of Cobb, CaliforniaSun, Dec 29, 7:35 PM PST · 14877 days ago · 0 km deep · 4 km away
26. 1.64 km S of Cobb, CaliforniaSun, Dec 29, 10:20 PM PST · 14877 days ago · 1 km deep · 0 km away
27. 1.64 km S of Cobb, CaliforniaSun, Dec 29, 10:21 PM PST · 14877 days ago · 2 km deep · 0 km away
28. 2.10 km SE of Redwood Valley, CaliforniaMon, Dec 30, 8:46 AM PST · 14876 days ago · 5 km deep · 68 km away
29. 1.95 km W of Cobb, CaliforniaMon, Dec 30, 9:49 AM PST · 14876 days ago · 1 km deep · 7 km away
30. 2.38 km W of Cobb, CaliforniaMon, Dec 30, 4:40 PM PST · 14876 days ago · 1 km deep · 10 km away
31. 1.67 km WSW of Cobb, CaliforniaMon, Dec 30, 6:54 PM PST · 14876 days ago · 3 km deep · 8 km away
32. 1.72 km WSW of Occidental, CaliforniaTue, Dec 31, 3:17 AM PST · 14875 days ago · 2 km deep · 47 km away
33. 2.06 km W of Cobb, CaliforniaTue, Dec 31, 6:47 AM PST · 14875 days ago · 3 km deep · 8 km away
34. 1.75 km WSW of Cobb, CaliforniaTue, Dec 31, 8:08 AM PST · 14875 days ago · 0 km deep · 6 km away
35. 1.66 km W of Cobb, CaliforniaTue, Dec 31, 2:10 PM PST · 14875 days ago · 1 km deep · 8 km away
36. 2.35 km SW of Cobb, CaliforniaTue, Dec 31, 9:30 PM PST · 14875 days ago · 1 km deep · 5 km away
37. 2.74 km WSW of Cobb, CaliforniaTue, Dec 31, 9:54 PM PST · 14875 days ago · 1 km deep · 5 km away
38. 2.45 km WSW of Cobb, CaliforniaTue, Dec 31, 10:48 PM PST · 14875 days ago · 1 km deep · 6 km away
39. 2.04 km SSW of Cobb, CaliforniaWed, Jan 1, 2:37 AM PST · 14874 days ago · 0 km deep · 1 km away
40. 1.65 km WNW of Cobb, CaliforniaWed, Jan 1, 11:44 PM PST · 14874 days ago · 2 km deep · 8 km away
41. 2.07 km W of Cobb, CaliforniaThu, Jan 2, 3:34 AM PST · 14873 days ago · 3 km deep · 9 km away
42. 2.06 km W of Cobb, CaliforniaFri, Jan 3, 1:52 AM PST · 14873 days ago · 3 km deep · 8 km away
43. 2.96 km W of Cobb, CaliforniaFri, Jan 3, 8:26 AM PST · 14872 days ago · 0 km deep · 8 km away
44. 2.46 km W of Cobb, CaliforniaFri, Jan 3, 8:27 AM PST · 14872 days ago · 1 km deep · 8 km away
45. 2.35 km SW of Cobb, CaliforniaFri, Jan 3, 8:43 PM PST · 14872 days ago · 1 km deep · 5 km away
46. 2.98 km WSW of Cobb, CaliforniaFri, Jan 3, 11:11 PM PST · 14872 days ago · 0 km deep · 8 km away
47. 1.68 km WSW of Cobb, CaliforniaFri, Jan 3, 11:13 PM PST · 14872 days ago · 0 km deep · 8 km away
48. 2.06 km WSW of Cobb, CaliforniaSat, Jan 4, 5:11 AM PST · 14871 days ago · 0 km deep · 7 km away
49. 1.75 km SW of Cobb, CaliforniaSat, Jan 4, 2:49 PM PST · 14871 days ago · 0 km deep · 5 km away
50. 2.010 km NNE of Hopland, CaliforniaSun, Jan 5, 3:24 AM PST · 14870 days ago · 6 km deep · 43 km away
51. 1.66 km W of Cobb, CaliforniaMon, Jan 6, 5:01 AM PST · 14869 days ago · 3 km deep · 8 km away
52. 1.612 km NE of Angwin, CaliforniaMon, Jan 6, 7:36 AM PST · 14869 days ago · 11 km deep · 33 km away
53. 2.16 km SW of Cobb, CaliforniaTue, Jan 7, 6:17 PM PST · 14868 days ago · -1 km deep · 5 km away
54. 1.716 km NNE of Upper Lake, CaliforniaTue, Jan 7, 6:54 PM PST · 14868 days ago · 6 km deep · 58 km away
55. 2.18 km ENE of Lower Lake, CaliforniaTue, Jan 7, 7:36 PM PST · 14868 days ago · 0 km deep · 25 km away
56. 1.919 km ENE of Potter Valley, CaliforniaWed, Jan 8, 12:43 AM PST · 14868 days ago · 6 km deep · 69 km away
57. 1.625 km SE of Covelo, CaliforniaWed, Jan 8, 3:34 AM PST · 14867 days ago · 4 km deep · 97 km away
58. 1.74 km NW of Redwood Valley, CaliforniaWed, Jan 8, 5:44 AM PST · 14867 days ago · 5 km deep · 72 km away
59. 2.45 km NE of Rohnert Park, CaliforniaWed, Jan 8, 6:32 AM PST · 14867 days ago · 5 km deep · 47 km away
60. 1.71 km E of Calpella, CaliforniaWed, Jan 8, 10:56 AM PST · 14867 days ago · 6 km deep · 64 km away

The first 60 of 175.

From the USGS Earthquake Hazards Program and its partner networks, event nc1133684. Read Tue, Sep 22, 2026, 9:31 PM UTC.