M1.8 earthquake 9 km W of Cobb, California

Magnitude

1.8 (md), micro

Local time

Sun, Jan 18, 1987, 2:17 AM PST

UTC

1987-01-18 10:17:15 UTC

Depth

-0.5 km (-0.3 mi), shallow

Epicenter

38.815° N, 122.827° 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

±0.04

Depth from

From location

Station coverage gap

49°

Stations used

12

• Cobb, CaliforniaPopulation 1,778. Forecast9 kmW
• Healdsburg, CaliforniaPopulation 11,742. Forecast23 kmN
• Santa Rosa, CaliforniaPopulation 178,127. Forecast43 kmNNW
• Los Angeles, CaliforniaPopulation 3,820,914. Forecast670 kmNW

After

1. 2.26 km WNW of Cobb, CaliforniaSat, Jan 24, 5:55 PM PST · 14485 days ago · -1 km deep · 3 km away
2. 2.16 km W of Cobb, CaliforniaSat, Jan 24, 7:47 PM PST · 14485 days ago · 1 km deep · 3 km away
3. 1.711 km ENE of Cloverdale, CaliforniaSat, Jan 24, 9:44 PM PST · 14485 days ago · 6 km deep · 8 km away
4. 1.716 km ENE of Potter Valley, CaliforniaSun, Jan 25, 2:02 AM PST · 14485 days ago · 7 km deep · 63 km away
5. 3.06 km WSW of Cobb, CaliforniaSun, Jan 25, 8:37 AM PST · 14485 days ago · 0 km deep · 3 km away
6. 1.76 km WSW of Cobb, CaliforniaSun, Jan 25, 8:38 AM PST · 14485 days ago · 1 km deep · 3 km away
7. 2.46 km WSW of Cobb, CaliforniaSun, Jan 25, 10:15 AM PST · 14485 days ago · 3 km deep · 3 km away
8. 1.67 km WSW of Cobb, CaliforniaSun, Jan 25, 10:34 AM PST · 14485 days ago · 1 km deep · 2 km away
9. 1.73 km W of Cobb, CaliforniaSun, Jan 25, 7:02 PM PST · 14484 days ago · 0 km deep · 5 km away
10. 2.29 km W of Cobb, CaliforniaMon, Jan 26, 1:24 AM PST · 14484 days ago · -1 km deep · 0 km away
11. 1.66 km W of Cobb, CaliforniaMon, Jan 26, 8:04 PM PST · 14483 days ago · 3 km deep · 3 km away
12. 2.77 km WSW of Cobb, CaliforniaMon, Jan 26, 10:17 PM PST · 14483 days ago · 0 km deep · 2 km away
13. 1.66 km WSW of Cobb, CaliforniaTue, Jan 27, 5:17 AM PST · 14483 days ago · 0 km deep · 3 km away
14. 1.53 km SW of Cobb, CaliforniaTue, Jan 27, 5:49 AM PST · 14483 days ago · 0 km deep · 7 km away
15. 1.66 km WNW of Cobb, CaliforniaTue, Jan 27, 6:07 AM PST · 14483 days ago · 0 km deep · 4 km away
16. 1.86 km W of Cobb, CaliforniaWed, Jan 28, 3:02 AM PST · 14482 days ago · 3 km deep · 2 km away
17. 1.86 km W of Cobb, CaliforniaWed, Jan 28, 7:38 AM PST · 14482 days ago · 1 km deep · 3 km away
18. 2.15 km SW of Cobb, CaliforniaWed, Jan 28, 10:29 AM PST · 14482 days ago · 2 km deep · 6 km away
19. 1.96 km W of Cobb, CaliforniaWed, Jan 28, 12:23 PM PST · 14482 days ago · 3 km deep · 3 km away
20. 2.05 km WNW of Cobb, CaliforniaThu, Jan 29, 2:07 AM PST · 14481 days ago · 1 km deep · 5 km away
21. 2.4Northern CaliforniaThu, Jan 29, 2:57 PM PST · 14481 days ago · -1 km deep · 38 km away
22. 2.05 km SW of Cobb, CaliforniaSat, Jan 31, 3:20 AM PST · 14479 days ago · 0 km deep · 6 km away
23. 1.96 km W of Cobb, CaliforniaSun, Feb 1, 4:55 AM PST · 14478 days ago · 3 km deep · 2 km away
24. 2.06 km W of Cobb, CaliforniaMon, Feb 2, 12:33 PM PST · 14477 days ago · 0 km deep · 3 km away
25. 1.75 km W of Cobb, CaliforniaMon, Feb 2, 1:04 PM PST · 14477 days ago · 1 km deep · 3 km away
26. 1.56 km WSW of Cobb, CaliforniaMon, Feb 2, 4:09 PM PST · 14476 days ago · 4 km deep · 3 km away
27. 1.85 km WNW of Cobb, CaliforniaMon, Feb 2, 6:58 PM PST · 14476 days ago · 2 km deep · 5 km away
28. 1.87 km W of Cobb, CaliforniaTue, Feb 3, 9:29 AM PST · 14476 days ago · 0 km deep · 3 km away
29. 1.54 km W of Cobb, CaliforniaTue, Feb 3, 9:04 PM PST · 14475 days ago · -1 km deep · 5 km away
30. 1.99 km W of Cobb, CaliforniaTue, Feb 3, 11:36 PM PST · 14475 days ago · 4 km deep · 1 km away
31. 2.09 km W of Cobb, CaliforniaWed, Feb 4, 4:56 PM PST · 14474 days ago · 0 km deep · 1 km away
32. 2.09 km W of Cobb, CaliforniaWed, Feb 4, 7:56 PM PST · 14474 days ago · -1 km deep · 1 km away
33. 1.66 km W of Cobb, CaliforniaThu, Feb 5, 12:19 AM PST · 14474 days ago · 3 km deep · 3 km away
34. 2.011 km NE of Talmage, CaliforniaThu, Feb 5, 1:46 PM PST · 14474 days ago · 7 km deep · 48 km away
35. 1.65 km W of Cobb, CaliforniaFri, Feb 6, 4:08 AM PST · 14473 days ago · 0 km deep · 4 km away
36. 1.65 km SW of Cobb, CaliforniaFri, Feb 6, 5:12 PM PST · 14472 days ago · 1 km deep · 6 km away
37. 1.7Northern CaliforniaSun, Feb 8, 8:09 AM PST · 14471 days ago · 0 km deep · 4 km away
38. 2.06 km W of Cobb, CaliforniaSun, Feb 8, 4:22 PM PST · 14470 days ago · 3 km deep · 3 km away
39. 1.918 km E of Sea Ranch, CaliforniaMon, Feb 9, 4:10 AM PST · 14470 days ago · 0 km deep · 37 km away
40. 1.67 km W of Cobb, CaliforniaMon, Feb 9, 3:49 PM PST · 14469 days ago · 3 km deep · 2 km away
41. 1.88 km W of Cobb, CaliforniaMon, Feb 9, 4:51 PM PST · 14469 days ago · 0 km deep · 1 km away
42. 1.98 km W of Cobb, CaliforniaMon, Feb 9, 4:53 PM PST · 14469 days ago · 1 km deep · 0 km away
43. 2.46 km E of Hopland, CaliforniaTue, Feb 10, 2:22 AM PST · 14469 days ago · 7 km deep · 26 km away
44. 1.67 km WSW of Cobb, CaliforniaWed, Feb 11, 6:59 AM PST · 14468 days ago · 1 km deep · 2 km away
45. 1.97 km WSW of Cobb, CaliforniaWed, Feb 11, 7:00 AM PST · 14468 days ago · 1 km deep · 3 km away
46. 1.66 km WNW of Cobb, CaliforniaWed, Feb 11, 1:01 PM PST · 14468 days ago · -1 km deep · 4 km away
47. 1.88 km WNW of Cobb, CaliforniaWed, Feb 11, 2:35 PM PST · 14468 days ago · -1 km deep · 4 km away
48. 2.05 km WSW of Cobb, CaliforniaWed, Feb 11, 9:10 PM PST · 14467 days ago · 0 km deep · 4 km away
49. 1.67 km W of Kenwood, CaliforniaThu, Feb 12, 2:18 AM PST · 14467 days ago · 6 km deep · 47 km away
50. 2.96 km W of Cobb, CaliforniaThu, Feb 12, 11:33 AM PST · 14467 days ago · 0 km deep · 3 km away
51. 1.76 km W of Cobb, CaliforniaThu, Feb 12, 11:40 AM PST · 14467 days ago · 0 km deep · 3 km away
52. 3.16 km W of Cobb, CaliforniaThu, Feb 12, 11:43 AM PST · 14467 days ago · 1 km deep · 3 km away
53. 1.85 km SW of Cobb, CaliforniaThu, Feb 12, 11:44 AM PST · 14467 days ago · 2 km deep · 7 km away
54. 2.014 km ENE of Angwin, CaliforniaFri, Feb 13, 2:05 AM PST · 14466 days ago · 9 km deep · 49 km away
55. 2.04 km W of Cobb, CaliforniaSat, Feb 14, 4:09 AM PST · 14465 days ago · 0 km deep · 4 km away
56. 2.510 km NW of Cobb, CaliforniaSat, Feb 14, 8:55 AM PST · 14465 days ago · 0 km deep · 7 km away
57. 1.68 km WSW of Cobb, CaliforniaSat, Feb 14, 6:01 PM PST · 14464 days ago · 4 km deep · 2 km away
58. 2.36 km W of Cobb, CaliforniaSat, Feb 14, 9:29 PM PST · 14464 days ago · 3 km deep · 2 km away
59. 1.82 km E of Forestville, CaliforniaSun, Feb 15, 4:09 AM PST · 14464 days ago · 2 km deep · 38 km away
60. 1.56 km W of Cobb, CaliforniaMon, Feb 16, 4:06 AM PST · 14463 days ago · 3 km deep · 3 km away

The first 60 of 172.

From the USGS Earthquake Hazards Program and its partner networks, event nc1146646. Read Tue, Sep 22, 2026, 11:16 AM UTC.