M1.9 earthquake 6 km W of Cobb, California

Magnitude

1.9 (md), micro

Local time

Thu, Jan 22, 1987, 2:43 AM PST

UTC

1987-01-22 10:43:27 UTC

Depth

-0.5 km (-0.3 mi), shallow

Epicenter

38.822° N, 122.793° W

Region

California

Tsunami flag

No

Status

Reviewed by a seismologist

Location uncertainty

About 0.2 km horizontally, 0.5 km in depth

Magnitude uncertainty

±0.10

Depth from

From location

Station coverage gap

43°

Stations used

16

• Cobb, CaliforniaPopulation 1,778. Forecast6 kmW
• Clearlake, CaliforniaPopulation 15,182. Forecast21 kmSW
• Santa Rosa, CaliforniaPopulation 178,127. Forecast43 kmN
• Los Angeles, CaliforniaPopulation 3,820,914. Forecast668 kmNW

After

1. 2.15 km WSW of Cobb, CaliforniaThu, Jan 22, 2:08 PM PST · 14494 days ago · -1 km deep · 3 km away
2. 1.98 km W of Cobb, CaliforniaThu, Jan 22, 4:14 PM PST · 14494 days ago · 1 km deep · 2 km away
3. 1.86 km W of Cobb, CaliforniaThu, Jan 22, 5:48 PM PST · 14494 days ago · -1 km deep · 1 km away
4. 2.27 km WSW of Cobb, CaliforniaThu, Jan 22, 6:04 PM PST · 14494 days ago · 3 km deep · 4 km away
5. 2.37 km WSW of Cobb, CaliforniaFri, Jan 23, 2:12 PM PST · 14493 days ago · 3 km deep · 3 km away
6. 1.79 km ESE of Hidden Valley Lake, CaliforniaFri, Jan 23, 4:11 PM PST · 14493 days ago · 7 km deep · 30 km away
7. 2.35 km W of Cobb, CaliforniaSat, Jan 24, 3:57 AM PST · 14492 days ago · 1 km deep · 1 km away
8. 2.17 km ENE of Rohnert Park, CaliforniaSat, Jan 24, 9:40 AM PST · 14492 days ago · 4 km deep · 52 km away
9. 2.26 km WNW of Cobb, CaliforniaSat, Jan 24, 5:55 PM PST · 14492 days ago · -1 km deep · 1 km away
10. 2.16 km W of Cobb, CaliforniaSat, Jan 24, 7:47 PM PST · 14492 days ago · 1 km deep · 0 km away
11. 1.711 km ENE of Cloverdale, CaliforniaSat, Jan 24, 9:44 PM PST · 14492 days ago · 6 km deep · 10 km away
12. 1.716 km ENE of Potter Valley, CaliforniaSun, Jan 25, 2:02 AM PST · 14491 days ago · 7 km deep · 63 km away
13. 3.06 km WSW of Cobb, CaliforniaSun, Jan 25, 8:37 AM PST · 14491 days ago · 0 km deep · 2 km away
14. 1.76 km WSW of Cobb, CaliforniaSun, Jan 25, 8:38 AM PST · 14491 days ago · 1 km deep · 2 km away
15. 2.46 km WSW of Cobb, CaliforniaSun, Jan 25, 10:15 AM PST · 14491 days ago · 3 km deep · 2 km away
16. 1.67 km WSW of Cobb, CaliforniaSun, Jan 25, 10:34 AM PST · 14491 days ago · 1 km deep · 2 km away
17. 1.73 km W of Cobb, CaliforniaSun, Jan 25, 7:02 PM PST · 14491 days ago · 0 km deep · 2 km away
18. 2.29 km W of Cobb, CaliforniaMon, Jan 26, 1:24 AM PST · 14490 days ago · -1 km deep · 3 km away
19. 1.66 km W of Cobb, CaliforniaMon, Jan 26, 8:04 PM PST · 14490 days ago · 3 km deep · 0 km away
20. 2.77 km WSW of Cobb, CaliforniaMon, Jan 26, 10:17 PM PST · 14490 days ago · 0 km deep · 3 km away
21. 1.66 km WSW of Cobb, CaliforniaTue, Jan 27, 5:17 AM PST · 14489 days ago · 0 km deep · 2 km away
22. 1.53 km SW of Cobb, CaliforniaTue, Jan 27, 5:49 AM PST · 14489 days ago · 0 km deep · 5 km away
23. 1.66 km WNW of Cobb, CaliforniaTue, Jan 27, 6:07 AM PST · 14489 days ago · 0 km deep · 2 km away
24. 1.86 km W of Cobb, CaliforniaWed, Jan 28, 3:02 AM PST · 14488 days ago · 3 km deep · 1 km away
25. 1.86 km W of Cobb, CaliforniaWed, Jan 28, 7:38 AM PST · 14488 days ago · 1 km deep · 0 km away
26. 2.15 km SW of Cobb, CaliforniaWed, Jan 28, 10:29 AM PST · 14488 days ago · 2 km deep · 5 km away
27. 1.96 km W of Cobb, CaliforniaWed, Jan 28, 12:23 PM PST · 14488 days ago · 3 km deep · 0 km away
28. 2.05 km WNW of Cobb, CaliforniaThu, Jan 29, 2:07 AM PST · 14487 days ago · 1 km deep · 3 km away
29. 2.4Northern CaliforniaThu, Jan 29, 2:57 PM PST · 14487 days ago · -1 km deep · 35 km away
30. 2.05 km SW of Cobb, CaliforniaSat, Jan 31, 3:20 AM PST · 14485 days ago · 0 km deep · 4 km away
31. 1.96 km W of Cobb, CaliforniaSun, Feb 1, 4:55 AM PST · 14484 days ago · 3 km deep · 1 km away
32. 2.06 km W of Cobb, CaliforniaMon, Feb 2, 12:33 PM PST · 14483 days ago · 0 km deep · 1 km away
33. 1.75 km W of Cobb, CaliforniaMon, Feb 2, 1:04 PM PST · 14483 days ago · 1 km deep · 0 km away
34. 1.56 km WSW of Cobb, CaliforniaMon, Feb 2, 4:09 PM PST · 14483 days ago · 4 km deep · 1 km away
35. 1.85 km WNW of Cobb, CaliforniaMon, Feb 2, 6:58 PM PST · 14483 days ago · 2 km deep · 2 km away
36. 1.87 km W of Cobb, CaliforniaTue, Feb 3, 9:29 AM PST · 14482 days ago · 0 km deep · 2 km away
37. 1.54 km W of Cobb, CaliforniaTue, Feb 3, 9:04 PM PST · 14482 days ago · -1 km deep · 1 km away
38. 1.99 km W of Cobb, CaliforniaTue, Feb 3, 11:36 PM PST · 14482 days ago · 4 km deep · 4 km away
39. 2.09 km W of Cobb, CaliforniaWed, Feb 4, 4:56 PM PST · 14481 days ago · 0 km deep · 4 km away
40. 2.09 km W of Cobb, CaliforniaWed, Feb 4, 7:56 PM PST · 14481 days ago · -1 km deep · 3 km away
41. 1.66 km W of Cobb, CaliforniaThu, Feb 5, 12:19 AM PST · 14481 days ago · 3 km deep · 0 km away
42. 2.011 km NE of Talmage, CaliforniaThu, Feb 5, 1:46 PM PST · 14480 days ago · 7 km deep · 48 km away
43. 1.65 km W of Cobb, CaliforniaFri, Feb 6, 4:08 AM PST · 14479 days ago · 0 km deep · 1 km away
44. 1.65 km SW of Cobb, CaliforniaFri, Feb 6, 5:12 PM PST · 14479 days ago · 1 km deep · 4 km away
45. 1.7Northern CaliforniaSun, Feb 8, 8:09 AM PST · 14477 days ago · 0 km deep · 1 km away
46. 2.06 km W of Cobb, CaliforniaSun, Feb 8, 4:22 PM PST · 14477 days ago · 3 km deep · 1 km away
47. 1.918 km E of Sea Ranch, CaliforniaMon, Feb 9, 4:10 AM PST · 14476 days ago · 0 km deep · 40 km away
48. 1.67 km W of Cobb, CaliforniaMon, Feb 9, 3:49 PM PST · 14476 days ago · 3 km deep · 1 km away
49. 1.88 km W of Cobb, CaliforniaMon, Feb 9, 4:51 PM PST · 14476 days ago · 0 km deep · 2 km away
50. 1.98 km W of Cobb, CaliforniaMon, Feb 9, 4:53 PM PST · 14476 days ago · 1 km deep · 3 km away
51. 2.46 km E of Hopland, CaliforniaTue, Feb 10, 2:22 AM PST · 14475 days ago · 7 km deep · 27 km away
52. 1.67 km WSW of Cobb, CaliforniaWed, Feb 11, 6:59 AM PST · 14474 days ago · 1 km deep · 3 km away
53. 1.97 km WSW of Cobb, CaliforniaWed, Feb 11, 7:00 AM PST · 14474 days ago · 1 km deep · 2 km away
54. 1.66 km WNW of Cobb, CaliforniaWed, Feb 11, 1:01 PM PST · 14474 days ago · -1 km deep · 2 km away
55. 1.88 km WNW of Cobb, CaliforniaWed, Feb 11, 2:35 PM PST · 14474 days ago · -1 km deep · 4 km away
56. 2.05 km WSW of Cobb, CaliforniaWed, Feb 11, 9:10 PM PST · 14474 days ago · 0 km deep · 3 km away
57. 1.67 km W of Kenwood, CaliforniaThu, Feb 12, 2:18 AM PST · 14473 days ago · 6 km deep · 47 km away
58. 2.96 km W of Cobb, CaliforniaThu, Feb 12, 11:33 AM PST · 14473 days ago · 0 km deep · 1 km away
59. 1.76 km W of Cobb, CaliforniaThu, Feb 12, 11:40 AM PST · 14473 days ago · 0 km deep · 1 km away
60. 3.16 km W of Cobb, CaliforniaThu, Feb 12, 11:43 AM PST · 14473 days ago · 1 km deep · 0 km away

The first 60 of 171.

Before

1. 2.13 km WSW of Green Valley, CaliforniaThu, Jan 22, 1:56 AM PST · 14494 days ago · 8 km deep · 83 km away
2. 1.67 km W of Cobb, CaliforniaThu, Jan 22, 12:04 AM PST · 14495 days ago · 0 km deep · 2 km away
3. 1.64 km WSW of Cobb, CaliforniaWed, Jan 21, 12:16 PM PST · 14495 days ago · 1 km deep · 3 km away
4. 1.916 km SE of Sea Ranch, CaliforniaWed, Jan 21, 7:40 AM PST · 14495 days ago · 4 km deep · 54 km away
5. 1.77 km NE of Healdsburg, CaliforniaTue, Jan 20, 9:49 AM PST · 14496 days ago · 2 km deep · 18 km away
6. 1.811 km E of Black Point-Green Point, CaliforniaTue, Jan 20, 6:00 AM PST · 14496 days ago · 16 km deep · 88 km away
7. 2.48 km E of Hidden Valley Lake, CaliforniaTue, Jan 20, 12:08 AM PST · 14497 days ago · 9 km deep · 28 km away
8. 1.88 km E of Hidden Valley Lake, CaliforniaMon, Jan 19, 4:09 PM PST · 14497 days ago · 8 km deep · 29 km away
9. 1.75 km WNW of Cobb, CaliforniaMon, Jan 19, 10:45 AM PST · 14497 days ago · 0 km deep · 2 km away
10. 1.712 km ENE of Cloverdale, CaliforniaSun, Jan 18, 7:03 PM PST · 14498 days ago · 0 km deep · 8 km away
11. 1.89 km W of Cobb, CaliforniaSun, Jan 18, 2:17 AM PST · 14498 days ago · 0 km deep · 3 km away
12. 1.86 km W of Cobb, CaliforniaSun, Jan 18, 12:20 AM PST · 14499 days ago · 1 km deep · 1 km away
13. 1.56 km W of Cobb, CaliforniaSun, Jan 18, 12:19 AM PST · 14499 days ago · 0 km deep · 1 km away
14. 1.86 km W of Cobb, CaliforniaSat, Jan 17, 5:45 PM PST · 14499 days ago · 3 km deep · 0 km away
15. 1.76 km W of Cobb, CaliforniaSat, Jan 17, 5:22 PM PST · 14499 days ago · 2 km deep · 1 km away
16. 1.75 km SW of Cobb, CaliforniaFri, Jan 16, 8:05 PM PST · 14500 days ago · 1 km deep · 4 km away
17. 1.66 km W of Cobb, CaliforniaFri, Jan 16, 7:32 PM PST · 14500 days ago · 2 km deep · 0 km away
18. 1.56 km E of Cloverdale, CaliforniaFri, Jan 16, 11:19 AM PST · 14500 days ago · 0 km deep · 13 km away
19. 1.62 km ENE of Penngrove, CaliforniaFri, Jan 16, 7:49 AM PST · 14500 days ago · 0 km deep · 58 km away
20. 1.61 km E of Roseland, CaliforniaFri, Jan 16, 5:49 AM PST · 14500 days ago · 17 km deep · 45 km away

From the USGS Earthquake Hazards Program and its partner networks, event nc93005. Read Mon, Sep 28, 2026, 8:52 PM UTC.