M3.1 earthquake 11 km NNE of Comptche, California

Magnitude

3.1 (md), minor

Local time

Wed, Feb 18, 1987, 10:47 AM PST

UTC

1987-02-18 18:47:07 UTC

Depth

2.1 km (1.3 mi), shallow

Epicenter

39.358° N, 123.529° W

Region

California

Tsunami flag

No

Status

Reviewed by a seismologist

Location uncertainty

About 0.4 km horizontally, 0.9 km in depth

Magnitude uncertainty

±0.12

Depth from

From location

Station coverage gap

176°

Stations used

32

• Brooktrails, CaliforniaPopulation 3,235. Forecast16 kmSW
• Ukiah, CaliforniaPopulation 15,917. Forecast36 kmNW
• Santa Rosa, CaliforniaPopulation 178,127. Forecast124 kmNW
• Los Angeles, CaliforniaPopulation 3,820,914. Forecast755 kmNW

After

1. 1.74 km W of Cobb, CaliforniaThu, Feb 19, 6:54 PM PST · 14460 days ago · -1 km deep · 88 km away
2. 1.77 km W of Cobb, CaliforniaThu, Feb 19, 9:56 PM PST · 14460 days ago · 3 km deep · 87 km away
3. 2.56 km W of Cobb, CaliforniaFri, Feb 20, 7:46 AM PST · 14459 days ago · 2 km deep · 87 km away
4. 2.36 km W of Cobb, CaliforniaFri, Feb 20, 7:53 AM PST · 14459 days ago · 2 km deep · 87 km away
5. 1.79 km WSW of Cobb, CaliforniaFri, Feb 20, 1:56 PM PST · 14459 days ago · 2 km deep · 87 km away
6. 1.76 km WSW of Cobb, CaliforniaFri, Feb 20, 5:30 PM PST · 14459 days ago · 3 km deep · 88 km away
7. 1.52 km SSE of Cobb, CaliforniaFri, Feb 20, 9:40 PM PST · 14459 days ago · 4 km deep · 93 km away
8. 1.710 km NW of Cobb, CaliforniaFri, Feb 20, 11:39 PM PST · 14459 days ago · 1 km deep · 81 km away
9. 1.81 km W of Cobb, CaliforniaSat, Feb 21, 4:15 PM PST · 14458 days ago · 4 km deep · 91 km away
10. 1.59 km W of Cobb, CaliforniaSat, Feb 21, 7:39 PM PST · 14458 days ago · 0 km deep · 85 km away
11. 2.16 km W of Cobb, CaliforniaSun, Feb 22, 1:17 PM PST · 14457 days ago · 3 km deep · 87 km away
12. 2.13 km SW of Cobb, CaliforniaSun, Feb 22, 9:54 PM PST · 14457 days ago · 1 km deep · 92 km away
13. 2.47 km WSW of Cobb, CaliforniaMon, Feb 23, 8:32 AM PST · 14456 days ago · 1 km deep · 88 km away
14. 2.04 km SW of Cobb, CaliforniaMon, Feb 23, 8:45 AM PST · 14456 days ago · 1 km deep · 91 km away
15. 1.96 km W of Cobb, CaliforniaMon, Feb 23, 2:32 PM PST · 14456 days ago · 3 km deep · 87 km away
16. 1.76 km WSW of Cobb, CaliforniaMon, Feb 23, 7:24 PM PST · 14456 days ago · 4 km deep · 88 km away
17. 1.84 km WSW of Cobb, CaliforniaTue, Feb 24, 5:01 AM PST · 14456 days ago · 1 km deep · 89 km away
18. 1.89 km W of Cobb, CaliforniaTue, Feb 24, 5:03 AM PST · 14456 days ago · -1 km deep · 84 km away
19. 2.117 km SW of Cloverdale, CaliforniaTue, Feb 24, 8:07 PM PST · 14455 days ago · 14 km deep · 81 km away
20. 1.95 km WNW of Cobb, CaliforniaWed, Feb 25, 3:17 AM PST · 14455 days ago · 0 km deep · 86 km away
21. 1.67 km WSW of Cobb, CaliforniaWed, Feb 25, 6:53 AM PST · 14455 days ago · 1 km deep · 88 km away
22. 1.65 km SW of Cobb, CaliforniaWed, Feb 25, 1:45 PM PST · 14454 days ago · -1 km deep · 92 km away
23. 1.64 km ESE of Philo, CaliforniaWed, Feb 25, 1:56 PM PST · 14454 days ago · 6 km deep · 35 km away
24. 2.021 km NE of Potter Valley, CaliforniaWed, Feb 25, 4:56 PM PST · 14454 days ago · 11 km deep · 52 km away
25. 1.8Northern CaliforniaThu, Feb 26, 3:36 AM PST · 14454 days ago · 4 km deep · 55 km away
26. 1.84 km WNW of Cobb, CaliforniaThu, Feb 26, 7:32 AM PST · 14453 days ago · 2 km deep · 87 km away
27. 1.520 km ENE of Potter Valley, CaliforniaThu, Feb 26, 8:04 AM PST · 14453 days ago · 4 km deep · 55 km away
28. 3.26 km W of Cobb, CaliforniaFri, Feb 27, 4:29 AM PST · 14453 days ago · 3 km deep · 87 km away
29. 2.55 km SW of Cobb, CaliforniaSat, Feb 28, 10:07 PM PST · 14451 days ago · 1 km deep · 91 km away
30. 2.05 km SW of Cobb, CaliforniaSun, Mar 1, 2:14 AM PST · 14451 days ago · 1 km deep · 91 km away
31. 2.34 km W of Cobb, CaliforniaSun, Mar 1, 10:08 AM PST · 14450 days ago · 1 km deep · 88 km away
32. 1.918 km ENE of Potter Valley, CaliforniaSun, Mar 1, 7:32 PM PST · 14450 days ago · 7 km deep · 54 km away
33. 1.95 km WSW of Cobb, CaliforniaSun, Mar 1, 8:57 PM PST · 14450 days ago · 1 km deep · 90 km away
34. 1.68 km WSW of Cobb, CaliforniaSun, Mar 1, 10:16 PM PST · 14450 days ago · 0 km deep · 87 km away
35. 1.66 km WSW of Cobb, CaliforniaMon, Mar 2, 12:37 AM PST · 14450 days ago · 3 km deep · 88 km away
36. 2.09 km W of Cobb, CaliforniaMon, Mar 2, 5:16 AM PST · 14450 days ago · -1 km deep · 86 km away
37. 2.518 km ENE of Potter Valley, CaliforniaMon, Mar 2, 9:57 PM PST · 14449 days ago · 6 km deep · 53 km away
38. 1.912 km SE of Laytonville, CaliforniaTue, Mar 3, 8:20 AM PST · 14448 days ago · 6 km deep · 29 km away
39. 2.14 km SW of Cobb, CaliforniaTue, Mar 3, 6:41 PM PST · 14448 days ago · 1 km deep · 92 km away
40. 2.3Northern CaliforniaWed, Mar 4, 10:33 AM PST · 14447 days ago · 1 km deep · 87 km away
41. 1.77 km W of Cobb, CaliforniaWed, Mar 4, 9:57 PM PST · 14447 days ago · 0 km deep · 87 km away
42. 2.07 km WSW of Cobb, CaliforniaThu, Mar 5, 5:23 AM PST · 14447 days ago · 1 km deep · 88 km away
43. 1.72 km SSE of Clear Lake Riviera, CAThu, Mar 5, 12:14 PM PST · 14446 days ago · -1 km deep · 84 km away
44. 2.64 km W of Cobb, CaliforniaThu, Mar 5, 4:59 PM PST · 14446 days ago · 1 km deep · 88 km away
45. 1.75 km W of Cobb, CaliforniaThu, Mar 5, 5:00 PM PST · 14446 days ago · 1 km deep · 88 km away
46. 1.76 km W of Cobb, CaliforniaFri, Mar 6, 6:22 AM PST · 14446 days ago · 3 km deep · 88 km away
47. 1.78 km WSW of Cobb, CaliforniaFri, Mar 6, 6:59 AM PST · 14446 days ago · 3 km deep · 87 km away
48. 2.611 km SE of Hopland, CaliforniaSat, Mar 7, 1:26 AM PST · 14445 days ago · 4 km deep · 67 km away
49. 2.88 km W of Cobb, CaliforniaSat, Mar 7, 1:34 AM PST · 14445 days ago · -1 km deep · 86 km away
50. 1.96 km W of Cobb, CaliforniaSat, Mar 7, 2:12 AM PST · 14445 days ago · 1 km deep · 88 km away
51. 1.65 km WSW of Cobb, CaliforniaSat, Mar 7, 3:04 PM PST · 14444 days ago · 1 km deep · 89 km away
52. 2.27 km W of Cobb, CaliforniaSat, Mar 7, 5:50 PM PST · 14444 days ago · 1 km deep · 87 km away
53. 1.76 km W of Cobb, CaliforniaSat, Mar 7, 6:31 PM PST · 14444 days ago · 3 km deep · 87 km away
54. 2.48 km W of Cobb, CaliforniaSun, Mar 8, 3:16 AM PST · 14444 days ago · 1 km deep · 86 km away
55. 1.93 km WSW of Anchor Bay, CaliforniaSun, Mar 8, 4:40 PM PST · 14443 days ago · 8 km deep · 64 km away
56. 1.81 km NE of Redway, CaliforniaSun, Mar 8, 5:07 PM PST · 14443 days ago · 22 km deep · 89 km away
57. 1.95 km SW of Cobb, CaliforniaSun, Mar 8, 11:30 PM PST · 14443 days ago · 0 km deep · 90 km away
58. 1.64 km WSW of Cobb, CaliforniaMon, Mar 9, 5:29 AM PST · 14443 days ago · 1 km deep · 89 km away
59. 1.98 km WSW of Cobb, CaliforniaMon, Mar 9, 12:28 PM PST · 14442 days ago · 3 km deep · 88 km away
60. 1.56 km SW of Cobb, CaliforniaMon, Mar 9, 2:20 PM PST · 14442 days ago · 3 km deep · 91 km away

The first 60 of 200.

From the USGS Earthquake Hazards Program and its partner networks, event nc94987. Read Wed, Sep 23, 2026, 2:35 AM UTC.