M1.5 earthquake 6 km W of Cobb, California

Magnitude

1.5 (md), micro

Local time

Mon, Feb 16, 1987, 4:06 AM PST

UTC

1987-02-16 12:06:56 UTC

Depth

3.4 km (2.1 mi), shallow

Epicenter

38.827° N, 122.801° 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

±0.14

Depth from

From location

Station coverage gap

56°

Stations used

13

• 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. 2.19 km NW of Bayview, CaliforniaWed, Feb 25, 8:52 PM PST · 14453 days ago · 6 km deep · 92 km away
2. 1.8Northern CaliforniaThu, Feb 26, 3:36 AM PST · 14453 days ago · 4 km deep · 63 km away
3. 1.84 km WNW of Cobb, CaliforniaThu, Feb 26, 7:32 AM PST · 14453 days ago · 2 km deep · 2 km away
4. 1.520 km ENE of Potter Valley, CaliforniaThu, Feb 26, 8:04 AM PST · 14453 days ago · 4 km deep · 63 km away
5. 3.26 km W of Cobb, CaliforniaFri, Feb 27, 4:29 AM PST · 14452 days ago · 3 km deep · 1 km away
6. 2.55 km SW of Cobb, CaliforniaSat, Feb 28, 10:07 PM PST · 14450 days ago · 1 km deep · 5 km away
7. 2.05 km SW of Cobb, CaliforniaSun, Mar 1, 2:14 AM PST · 14450 days ago · 1 km deep · 5 km away
8. 2.34 km W of Cobb, CaliforniaSun, Mar 1, 10:08 AM PST · 14450 days ago · 1 km deep · 2 km away
9. 1.918 km ENE of Potter Valley, CaliforniaSun, Mar 1, 7:32 PM PST · 14449 days ago · 7 km deep · 59 km away
10. 1.95 km WSW of Cobb, CaliforniaSun, Mar 1, 8:57 PM PST · 14449 days ago · 1 km deep · 3 km away
11. 1.68 km WSW of Cobb, CaliforniaSun, Mar 1, 10:16 PM PST · 14449 days ago · 0 km deep · 3 km away
12. 1.66 km WSW of Cobb, CaliforniaMon, Mar 2, 12:37 AM PST · 14449 days ago · 3 km deep · 2 km away
13. 2.09 km W of Cobb, CaliforniaMon, Mar 2, 5:16 AM PST · 14449 days ago · -1 km deep · 3 km away
14. 2.518 km ENE of Potter Valley, CaliforniaMon, Mar 2, 9:57 PM PST · 14448 days ago · 6 km deep · 61 km away
15. 1.912 km SE of Laytonville, CaliforniaTue, Mar 3, 8:20 AM PST · 14448 days ago · 6 km deep · 100 km away
16. 2.14 km SW of Cobb, CaliforniaTue, Mar 3, 6:41 PM PST · 14447 days ago · 1 km deep · 6 km away
17. 2.3Northern CaliforniaWed, Mar 4, 10:33 AM PST · 14447 days ago · 1 km deep · 1 km away
18. 1.77 km W of Cobb, CaliforniaWed, Mar 4, 9:57 PM PST · 14446 days ago · 0 km deep · 2 km away
19. 2.07 km WSW of Cobb, CaliforniaThu, Mar 5, 5:23 AM PST · 14446 days ago · 1 km deep · 3 km away
20. 1.72 km SSE of Clear Lake Riviera, CAThu, Mar 5, 12:14 PM PST · 14446 days ago · -1 km deep · 15 km away
21. 2.64 km W of Cobb, CaliforniaThu, Mar 5, 4:59 PM PST · 14445 days ago · 1 km deep · 2 km away
22. 1.75 km W of Cobb, CaliforniaThu, Mar 5, 5:00 PM PST · 14445 days ago · 1 km deep · 2 km away
23. 1.76 km W of Cobb, CaliforniaFri, Mar 6, 6:22 AM PST · 14445 days ago · 3 km deep · 1 km away
24. 1.78 km WSW of Cobb, CaliforniaFri, Mar 6, 6:59 AM PST · 14445 days ago · 3 km deep · 3 km away
25. 2.611 km SE of Hopland, CaliforniaSat, Mar 7, 1:26 AM PST · 14444 days ago · 4 km deep · 21 km away
26. 2.88 km W of Cobb, CaliforniaSat, Mar 7, 1:34 AM PST · 14444 days ago · -1 km deep · 2 km away
27. 1.610 km ENE of Hidden Valley Lake, CaliforniaSat, Mar 7, 1:41 AM PST · 14444 days ago · 2 km deep · 30 km away
28. 1.96 km W of Cobb, CaliforniaSat, Mar 7, 2:12 AM PST · 14444 days ago · 1 km deep · 2 km away
29. 1.65 km WSW of Cobb, CaliforniaSat, Mar 7, 3:04 PM PST · 14444 days ago · 1 km deep · 3 km away
30. 2.27 km W of Cobb, CaliforniaSat, Mar 7, 5:50 PM PST · 14443 days ago · 1 km deep · 2 km away
31. 1.76 km W of Cobb, CaliforniaSat, Mar 7, 6:31 PM PST · 14443 days ago · 3 km deep · 1 km away
32. 2.48 km W of Cobb, CaliforniaSun, Mar 8, 3:16 AM PST · 14443 days ago · 1 km deep · 3 km away
33. 1.93 km WSW of Anchor Bay, CaliforniaSun, Mar 8, 4:40 PM PST · 14443 days ago · 8 km deep · 71 km away
34. 1.95 km SW of Cobb, CaliforniaSun, Mar 8, 11:30 PM PST · 14442 days ago · 0 km deep · 4 km away
35. 1.64 km WSW of Cobb, CaliforniaMon, Mar 9, 5:29 AM PST · 14442 days ago · 1 km deep · 3 km away
36. 1.98 km WSW of Cobb, CaliforniaMon, Mar 9, 12:28 PM PST · 14442 days ago · 3 km deep · 3 km away
37. 1.56 km SW of Cobb, CaliforniaMon, Mar 9, 2:20 PM PST · 14442 days ago · 3 km deep · 5 km away
38. 1.6Northern CaliforniaTue, Mar 10, 4:06 AM PST · 14441 days ago · 1 km deep · 4 km away
39. 1.7Northern CaliforniaTue, Mar 10, 6:45 AM PST · 14441 days ago · 2 km deep · 2 km away
40. 2.37 km WSW of Cobb, CaliforniaTue, Mar 10, 10:10 AM PST · 14441 days ago · 1 km deep · 3 km away
41. 2.816 km NE of Upper Lake, CaliforniaTue, Mar 10, 2:12 PM PST · 14441 days ago · 3 km deep · 51 km away
42. 2.117 km NE of Upper Lake, CaliforniaTue, Mar 10, 4:06 PM PST · 14441 days ago · 6 km deep · 51 km away
43. 2.06 km SW of Cobb, CaliforniaTue, Mar 10, 9:03 PM PST · 14440 days ago · 1 km deep · 5 km away
44. 1.67 km WSW of Cobb, CaliforniaWed, Mar 11, 4:40 AM PST · 14440 days ago · 1 km deep · 3 km away
45. 2.416 km NE of Upper Lake, CaliforniaWed, Mar 11, 10:15 AM PST · 14440 days ago · 6 km deep · 50 km away
46. 1.67 km WNW of Geyserville, CaliforniaWed, Mar 11, 12:44 PM PST · 14440 days ago · 2 km deep · 18 km away
47. 2.37 km W of Cobb, CaliforniaWed, Mar 11, 3:21 PM PST · 14440 days ago · 3 km deep · 2 km away
48. 2.26 km WSW of Cobb, CaliforniaThu, Mar 12, 8:16 AM PST · 14439 days ago · 3 km deep · 3 km away
49. 2.912 km ESE of Hidden Valley Lake, CaliforniaThu, Mar 12, 6:44 PM PST · 14438 days ago · 9 km deep · 33 km away
50. 1.512 km ESE of Hidden Valley Lake, CaliforniaThu, Mar 12, 7:17 PM PST · 14438 days ago · 5 km deep · 33 km away
51. 1.68 km WSW of Cobb, CaliforniaThu, Mar 12, 9:18 PM PST · 14438 days ago · 2 km deep · 3 km away
52. 1.86 km WSW of Cobb, CaliforniaFri, Mar 13, 12:27 AM PST · 14438 days ago · 1 km deep · 2 km away
53. 1.56 km W of Cobb, CaliforniaFri, Mar 13, 2:27 AM PST · 14438 days ago · 3 km deep · 1 km away
54. 3.09 km WSW of Cobb, CaliforniaFri, Mar 13, 7:08 AM PST · 14438 days ago · 3 km deep · 4 km away
55. 2.89 km WSW of Cobb, CaliforniaFri, Mar 13, 7:09 AM PST · 14438 days ago · 2 km deep · 4 km away
56. 1.65 km N of Novato, CaliforniaFri, Mar 13, 3:51 PM PST · 14438 days ago · 2 km deep · 77 km away
57. 2.17 km WSW of Cobb, CaliforniaSat, Mar 14, 6:03 AM PST · 14437 days ago · 2 km deep · 2 km away
58. 1.55 km SW of Cobb, CaliforniaSat, Mar 14, 7:03 AM PST · 14437 days ago · 2 km deep · 5 km away
59. 2.07 km E of Clearlake Oaks, CaliforniaSat, Mar 14, 10:57 AM PST · 14437 days ago · 1 km deep · 29 km away
60. 1.76 km WSW of Cobb, CaliforniaSat, Mar 14, 11:03 AM PST · 14437 days ago · 1 km deep · 2 km away

The first 60 of 175.

From the USGS Earthquake Hazards Program and its partner networks, event nc94928. Read Tue, Sep 22, 2026, 12:12 PM UTC.