M1.6 earthquake 6 km W of Cobb, California

Magnitude

1.6 (md), micro

Local time

Fri, Dec 5, 1986, 12:35 PM PST

UTC

1986-12-05 20:35:24 UTC

Depth

1.6 km (1.0 mi), shallow

Epicenter

38.828° N, 122.801° W

Region

California

Tsunami flag

No

Status

Reviewed by a seismologist

Location uncertainty

About 1.0 km horizontally, 7.0 km in depth

Magnitude uncertainty

±0.13

Depth from

From location

Station coverage gap

117°

Stations used

6

• Cobb, CaliforniaPopulation 1,778. Forecast7 kmW
• Clearlake, CaliforniaPopulation 15,182. Forecast21 kmSW
• Santa Rosa, CaliforniaPopulation 178,127. Forecast44 kmN
• Los Angeles, CaliforniaPopulation 3,820,914. Forecast669 kmNW

After

1. 1.77 km E of Geyserville, CaliforniaWed, Dec 17, 4:06 PM PST · 14523 days ago · 2 km deep · 14 km away
2. 1.98 km ESE of Hidden Valley Lake, CaliforniaThu, Dec 18, 2:25 AM PST · 14523 days ago · 7 km deep · 29 km away
3. 1.69 km NW of Cobb, CaliforniaThu, Dec 18, 3:25 AM PST · 14523 days ago · 1 km deep · 5 km away
4. 1.98 km ESE of Hidden Valley Lake, CaliforniaThu, Dec 18, 8:45 AM PST · 14523 days ago · 7 km deep · 29 km away
5. 1.96 km ENE of Sonoma, CaliforniaThu, Dec 18, 8:30 PM PST · 14522 days ago · 10 km deep · 68 km away
6. 1.66 km W of Cobb, CaliforniaFri, Dec 19, 12:44 AM PST · 14522 days ago · 3 km deep · 1 km away
7. 2.5Northern CaliforniaFri, Dec 19, 3:27 AM PST · 14522 days ago · 9 km deep · 79 km away
8. 1.87 km WSW of Cobb, CaliforniaFri, Dec 19, 5:55 PM PST · 14521 days ago · 0 km deep · 3 km away
9. 2.58 km E of Willits, CaliforniaFri, Dec 19, 8:14 PM PST · 14521 days ago · 8 km deep · 75 km away
10. 1.88 km ESE of Hidden Valley Lake, CaliforniaFri, Dec 19, 9:42 PM PST · 14521 days ago · 6 km deep · 30 km away
11. 2.17 km ENE of Napa, CaliforniaSat, Dec 20, 12:55 AM PST · 14521 days ago · 4 km deep · 75 km away
12. 1.86 km N of Green Valley, CaliforniaSat, Dec 20, 3:49 AM PST · 14521 days ago · 10 km deep · 79 km away
13. 2.16 km SW of Cobb, CaliforniaSat, Dec 20, 7:13 AM PST · 14521 days ago · 1 km deep · 6 km away
14. 1.66 km W of Cobb, CaliforniaSat, Dec 20, 7:47 AM PST · 14521 days ago · 3 km deep · 1 km away
15. 1.75 km W of Cobb, CaliforniaSat, Dec 20, 8:20 AM PST · 14521 days ago · -1 km deep · 1 km away
16. 2.06 km W of Cobb, CaliforniaSat, Dec 20, 4:10 PM PST · 14520 days ago · 0 km deep · 1 km away
17. 1.86 km WNW of Cobb, CaliforniaSat, Dec 20, 4:13 PM PST · 14520 days ago · -1 km deep · 1 km away
18. 1.56 km W of Cobb, CaliforniaSat, Dec 20, 4:15 PM PST · 14520 days ago · 1 km deep · 1 km away
19. 1.76 km W of Cobb, CaliforniaSun, Dec 21, 1:08 AM PST · 14520 days ago · -1 km deep · 1 km away
20. 1.98 km W of Cobb, CaliforniaSun, Dec 21, 9:06 AM PST · 14520 days ago · 0 km deep · 2 km away
21. 1.65 km SW of Cobb, CaliforniaSun, Dec 21, 11:09 AM PST · 14520 days ago · -1 km deep · 4 km away
22. 1.57 km E of Hidden Valley Lake, CaliforniaSun, Dec 21, 12:10 PM PST · 14520 days ago · 8 km deep · 29 km away
23. 1.67 km W of Hopland, CaliforniaSun, Dec 21, 11:07 PM PST · 14519 days ago · 4 km deep · 38 km away
24. 1.77 km W of Cobb, CaliforniaMon, Dec 22, 1:31 AM PST · 14519 days ago · -1 km deep · 0 km away
25. 1.95 km WSW of Cobb, CaliforniaMon, Dec 22, 2:08 AM PST · 14519 days ago · 1 km deep · 3 km away
26. 1.614 km ESE of Hidden Valley Lake, CaliforniaMon, Dec 22, 5:04 AM PST · 14519 days ago · 1 km deep · 36 km away
27. 2.19 km W of Cobb, CaliforniaMon, Dec 22, 6:04 AM PST · 14519 days ago · 0 km deep · 3 km away
28. 1.96 km WNW of Cobb, CaliforniaMon, Dec 22, 9:58 AM PST · 14519 days ago · 0 km deep · 1 km away
29. 2.15 km ENE of Willits, CaliforniaMon, Dec 22, 4:03 PM PST · 14518 days ago · 2 km deep · 80 km away
30. 1.75 km ENE of Willits, CaliforniaMon, Dec 22, 4:05 PM PST · 14518 days ago · 2 km deep · 80 km away
31. 1.65 km SW of Cobb, CaliforniaMon, Dec 22, 7:26 PM PST · 14518 days ago · -1 km deep · 6 km away
32. 2.07 km E of Willits, CaliforniaMon, Dec 22, 11:20 PM PST · 14518 days ago · 7 km deep · 76 km away
33. 2.44 km WNW of Cobb, CaliforniaTue, Dec 23, 6:29 AM PST · 14518 days ago · 0 km deep · 3 km away
34. 2.49 km ESE of Hidden Valley Lake, CaliforniaTue, Dec 23, 12:45 PM PST · 14518 days ago · 8 km deep · 30 km away
35. 2.39 km WSW of Cobb, CaliforniaTue, Dec 23, 4:32 PM PST · 14517 days ago · 2 km deep · 4 km away
36. 1.78 km ESE of Hidden Valley Lake, CaliforniaTue, Dec 23, 8:30 PM PST · 14517 days ago · 4 km deep · 29 km away
37. 1.610 km ESE of Hidden Valley Lake, CaliforniaWed, Dec 24, 3:13 AM PST · 14517 days ago · 7 km deep · 31 km away
38. 1.74 km WSW of Cobb, CaliforniaWed, Dec 24, 6:59 PM PST · 14516 days ago · 1 km deep · 4 km away
39. 1.613 km E of Comptche, CaliforniaWed, Dec 24, 9:26 PM PST · 14516 days ago · 3 km deep · 74 km away
40. 1.79 km W of Cobb, CaliforniaWed, Dec 24, 10:00 PM PST · 14516 days ago · -1 km deep · 3 km away
41. 2.16 km WSW of Cobb, CaliforniaThu, Dec 25, 7:13 AM PST · 14516 days ago · 0 km deep · 3 km away
42. 1.76 km WSW of Cobb, CaliforniaThu, Dec 25, 11:19 AM PST · 14516 days ago · -1 km deep · 2 km away
43. 1.68 km E of Willits, CaliforniaThu, Dec 25, 11:35 AM PST · 14516 days ago · 9 km deep · 75 km away
44. 2.25 km WSW of Cobb, CaliforniaThu, Dec 25, 3:16 PM PST · 14515 days ago · 0 km deep · 4 km away
45. 3.06 km W of Cobb, CaliforniaFri, Dec 26, 2:29 AM PST · 14515 days ago · 2 km deep · 1 km away
46. 2.17 km W of Cobb, CaliforniaFri, Dec 26, 5:46 PM PST · 14514 days ago · 2 km deep · 1 km away
47. 1.821 km ENE of Potter Valley, CaliforniaSat, Dec 27, 6:10 PM PST · 14513 days ago · 0 km deep · 62 km away
48. 1.98 km E of Hidden Valley Lake, CaliforniaSun, Dec 28, 7:44 PM PST · 14512 days ago · 9 km deep · 30 km away
49. 1.79 km W of Cobb, CaliforniaSun, Dec 28, 10:45 PM PST · 14512 days ago · 0 km deep · 3 km away
50. 1.79 km W of Cobb, CaliforniaMon, Dec 29, 12:01 AM PST · 14512 days ago · 0 km deep · 3 km away
51. 1.94 km WNW of Cobb, CaliforniaMon, Dec 29, 1:31 AM PST · 14512 days ago · 2 km deep · 2 km away
52. 2.111 km W of Cobb, CaliforniaMon, Dec 29, 7:09 AM PST · 14512 days ago · 4 km deep · 5 km away
53. 1.84 km WSW of Cobb, CaliforniaMon, Dec 29, 10:24 PM PST · 14511 days ago · 0 km deep · 4 km away
54. 1.55 km WSW of Cobb, CaliforniaTue, Dec 30, 7:12 AM PST · 14511 days ago · 3 km deep · 4 km away
55. 2.27 km W of Cobb, CaliforniaTue, Dec 30, 2:58 PM PST · 14510 days ago · 4 km deep · 2 km away
56. 1.77 km W of Cobb, CaliforniaWed, Dec 31, 8:19 AM PST · 14510 days ago · 3 km deep · 1 km away
57. 1.85 km SW of Cobb, CaliforniaWed, Dec 31, 9:36 AM PST · 14510 days ago · -1 km deep · 5 km away
58. 2.27 km W of Cobb, CaliforniaWed, Dec 31, 10:33 AM PST · 14510 days ago · 1 km deep · 1 km away
59. 3.17 km W of Cobb, CaliforniaWed, Dec 31, 10:33 AM PST · 14510 days ago · 1 km deep · 1 km away
60. 2.87 km W of Cobb, CaliforniaWed, Dec 31, 10:34 AM PST · 14510 days ago · -1 km deep · 1 km away

The first 60 of 178.

From the USGS Earthquake Hazards Program and its partner networks, event nc1145666. Read Tue, Sep 22, 2026, 9:20 AM UTC.