M1.6 earthquake 9 km NW of Cobb, California

Magnitude

1.6 (md), micro

Local time

Thu, Dec 18, 1986, 3:25 AM PST

UTC

1986-12-18 11:25:17 UTC

Depth

0.8 km (0.5 mi), shallow

Epicenter

38.873° N, 122.810° W

Region

California

Tsunami flag

No

Status

Reviewed by a seismologist

Location uncertainty

About 0.3 km horizontally, 0.8 km in depth

Magnitude uncertainty

±0.15

Depth from

From location

Station coverage gap

61°

Stations used

12

• Cobb, CaliforniaPopulation 1,778. Forecast9 kmNW
• Clearlake, CaliforniaPopulation 15,182. Forecast18 kmWSW
• Santa Rosa, CaliforniaPopulation 178,127. Forecast49 kmN
• Los Angeles, CaliforniaPopulation 3,820,914. Forecast674 kmNW

After

1. 1.65 km SW of Cobb, CaliforniaMon, Dec 22, 7:26 PM PST · 14518 days ago · -1 km deep · 11 km away
2. 2.07 km E of Willits, CaliforniaMon, Dec 22, 11:20 PM PST · 14518 days ago · 7 km deep · 71 km away
3. 2.44 km WNW of Cobb, CaliforniaTue, Dec 23, 6:29 AM PST · 14518 days ago · 0 km deep · 5 km away
4. 2.49 km ESE of Hidden Valley Lake, CaliforniaTue, Dec 23, 12:45 PM PST · 14518 days ago · 8 km deep · 32 km away
5. 2.39 km WSW of Cobb, CaliforniaTue, Dec 23, 4:32 PM PST · 14517 days ago · 2 km deep · 9 km away
6. 1.78 km ESE of Hidden Valley Lake, CaliforniaTue, Dec 23, 8:30 PM PST · 14517 days ago · 4 km deep · 31 km away
7. 1.610 km ESE of Hidden Valley Lake, CaliforniaWed, Dec 24, 3:13 AM PST · 14517 days ago · 7 km deep · 33 km away
8. 1.74 km WSW of Cobb, CaliforniaWed, Dec 24, 6:59 PM PST · 14516 days ago · 1 km deep · 9 km away
9. 1.613 km E of Comptche, CaliforniaWed, Dec 24, 9:26 PM PST · 14516 days ago · 3 km deep · 70 km away
10. 1.79 km W of Cobb, CaliforniaWed, Dec 24, 10:00 PM PST · 14516 days ago · -1 km deep · 7 km away
11. 2.16 km WSW of Cobb, CaliforniaThu, Dec 25, 7:13 AM PST · 14516 days ago · 0 km deep · 8 km away
12. 1.76 km WSW of Cobb, CaliforniaThu, Dec 25, 11:19 AM PST · 14516 days ago · -1 km deep · 8 km away
13. 1.68 km E of Willits, CaliforniaThu, Dec 25, 11:35 AM PST · 14516 days ago · 9 km deep · 71 km away
14. 2.25 km WSW of Cobb, CaliforniaThu, Dec 25, 3:16 PM PST · 14515 days ago · 0 km deep · 9 km away
15. 3.06 km W of Cobb, CaliforniaFri, Dec 26, 2:29 AM PST · 14515 days ago · 2 km deep · 6 km away
16. 2.17 km W of Cobb, CaliforniaFri, Dec 26, 5:46 PM PST · 14514 days ago · 2 km deep · 6 km away
17. 1.821 km ENE of Potter Valley, CaliforniaSat, Dec 27, 6:10 PM PST · 14513 days ago · 0 km deep · 57 km away
18. 1.98 km E of Hidden Valley Lake, CaliforniaSun, Dec 28, 7:44 PM PST · 14512 days ago · 9 km deep · 31 km away
19. 1.79 km W of Cobb, CaliforniaSun, Dec 28, 10:45 PM PST · 14512 days ago · 0 km deep · 6 km away
20. 1.79 km W of Cobb, CaliforniaMon, Dec 29, 12:01 AM PST · 14512 days ago · 0 km deep · 6 km away
21. 1.94 km WNW of Cobb, CaliforniaMon, Dec 29, 1:31 AM PST · 14512 days ago · 2 km deep · 5 km away
22. 2.111 km W of Cobb, CaliforniaMon, Dec 29, 7:09 AM PST · 14512 days ago · 4 km deep · 8 km away
23. 1.84 km WSW of Cobb, CaliforniaMon, Dec 29, 10:24 PM PST · 14511 days ago · 0 km deep · 9 km away
24. 1.55 km WSW of Cobb, CaliforniaTue, Dec 30, 7:12 AM PST · 14511 days ago · 3 km deep · 9 km away
25. 2.27 km W of Cobb, CaliforniaTue, Dec 30, 2:58 PM PST · 14510 days ago · 4 km deep · 7 km away
26. 1.77 km W of Cobb, CaliforniaWed, Dec 31, 8:19 AM PST · 14510 days ago · 3 km deep · 6 km away
27. 1.85 km SW of Cobb, CaliforniaWed, Dec 31, 9:36 AM PST · 14510 days ago · -1 km deep · 10 km away
28. 2.27 km W of Cobb, CaliforniaWed, Dec 31, 10:33 AM PST · 14510 days ago · 1 km deep · 6 km away
29. 3.17 km W of Cobb, CaliforniaWed, Dec 31, 10:33 AM PST · 14510 days ago · 1 km deep · 6 km away
30. 2.87 km W of Cobb, CaliforniaWed, Dec 31, 10:34 AM PST · 14510 days ago · -1 km deep · 5 km away
31. 1.77 km W of Cobb, CaliforniaWed, Dec 31, 10:35 AM PST · 14510 days ago · 1 km deep · 5 km away
32. 1.77 km W of Cobb, CaliforniaWed, Dec 31, 10:36 AM PST · 14510 days ago · -1 km deep · 7 km away
33. 2.07 km W of Cobb, CaliforniaWed, Dec 31, 10:38 AM PST · 14510 days ago · 0 km deep · 5 km away
34. 1.88 km ESE of Hidden Valley Lake, CaliforniaWed, Dec 31, 5:35 PM PST · 14509 days ago · 7 km deep · 32 km away
35. 1.92 km E of Rohnert Park, CaliforniaWed, Dec 31, 7:46 PM PST · 14509 days ago · 3 km deep · 61 km away
36. 1.87 km W of Cobb, CaliforniaThu, Jan 1, 5:03 AM PST · 14509 days ago · 2 km deep · 6 km away
37. 2.42 km E of Rohnert Park, CaliforniaFri, Jan 2, 3:42 AM PST · 14508 days ago · 4 km deep · 61 km away
38. 1.82 km E of Rohnert Park, CaliforniaFri, Jan 2, 3:49 AM PST · 14508 days ago · 3 km deep · 60 km away
39. 2.12 km E of Rohnert Park, CaliforniaFri, Jan 2, 3:50 AM PST · 14508 days ago · 4 km deep · 61 km away
40. 1.72 km E of Rohnert Park, CaliforniaFri, Jan 2, 3:50 AM PST · 14508 days ago · 2 km deep · 60 km away
41. 2.22 km E of Rohnert Park, CaliforniaFri, Jan 2, 5:24 AM PST · 14508 days ago · 3 km deep · 61 km away
42. 1.63 km SSE of Roseland, CaliforniaFri, Jan 2, 6:07 AM PST · 14508 days ago · 3 km deep · 54 km away
43. 2.57 km W of Cobb, CaliforniaFri, Jan 2, 12:20 PM PST · 14508 days ago · 4 km deep · 6 km away
44. 2.17 km W of Cobb, CaliforniaFri, Jan 2, 3:34 PM PST · 14507 days ago · 4 km deep · 6 km away
45. 2.25 km SW of Yountville, CaliforniaSat, Jan 3, 1:29 AM PST · 14507 days ago · 6 km deep · 66 km away
46. 1.66 km W of Cobb, CaliforniaSat, Jan 3, 11:00 AM PST · 14507 days ago · 1 km deep · 6 km away
47. 1.96 km W of Cobb, CaliforniaSun, Jan 4, 3:50 AM PST · 14506 days ago · 3 km deep · 6 km away
48. 2.15 km SW of Cobb, CaliforniaSun, Jan 4, 5:03 AM PST · 14506 days ago · 0 km deep · 11 km away
49. 1.68 km W of Cobb, CaliforniaMon, Jan 5, 2:43 AM PST · 14505 days ago · 1 km deep · 6 km away
50. 2.45 km SW of Cobb, CaliforniaMon, Jan 5, 7:57 AM PST · 14505 days ago · 1 km deep · 10 km away
51. 1.717 km WSW of Elk Creek, CaliforniaMon, Jan 5, 5:14 PM PST · 14504 days ago · 3 km deep · 73 km away
52. 1.66 km W of Cobb, CaliforniaMon, Jan 5, 6:24 PM PST · 14504 days ago · 3 km deep · 6 km away
53. 1.74 km WNW of Cobb, CaliforniaTue, Jan 6, 6:24 AM PST · 14504 days ago · 2 km deep · 5 km away
54. 2.04 km WSW of North Lakeport, CaliforniaTue, Jan 6, 11:10 AM PST · 14504 days ago · 4 km deep · 26 km away
55. 3.45 km SW of Cobb, CaliforniaWed, Jan 7, 4:13 AM PST · 14503 days ago · 0 km deep · 9 km away
56. 1.96 km SW of Cobb, CaliforniaWed, Jan 7, 4:20 AM PST · 14503 days ago · 1 km deep · 10 km away
57. 2.47 km E of Hidden Valley Lake, CaliforniaThu, Jan 8, 3:30 PM PST · 14501 days ago · 8 km deep · 30 km away
58. 2.14 km WSW of Cobb, CaliforniaThu, Jan 8, 10:07 PM PST · 14501 days ago · 1 km deep · 8 km away
59. 1.75 km ESE of Talmage, CaliforniaFri, Jan 9, 12:48 AM PST · 14501 days ago · 5 km deep · 37 km away
60. 1.87 km NW of Yolo, CaliforniaFri, Jan 9, 7:26 PM PST · 14500 days ago · 5 km deep · 82 km away

The first 60 of 174.

From the USGS Earthquake Hazards Program and its partner networks, event nc1145968. Read Tue, Sep 22, 2026, 10:17 AM UTC.