M2.1 earthquake 5 km W of Cobb, California

Magnitude

2.1 (md), micro

Local time

Wed, Jun 24, 1987, 1:13 PM PDT

UTC

1987-06-24 20:13:16 UTC

Depth

0.7 km (0.4 mi), shallow

Epicenter

38.828° N, 122.780° W

Region

California

Tsunami flag

No

Status

Reviewed by a seismologist

Location uncertainty

About 0.2 km horizontally, 0.7 km in depth

Magnitude uncertainty

±0.16

Depth from

From location

Station coverage gap

42°

Stations used

21

• Cobb, CaliforniaPopulation 1,778. Forecast5 kmW
• Clearlake, CaliforniaPopulation 15,182. Forecast20 kmSW
• Santa Rosa, CaliforniaPopulation 178,127. Forecast43 kmN
• Los Angeles, CaliforniaPopulation 3,820,914. Forecast668 kmNW

After

1. 1.94 km WSW of Cobb, CaliforniaThu, Jul 9, 6:59 AM PDT · 14320 days ago · 1 km deep · 3 km away
2. 1.74 km SSW of Cobb, CaliforniaThu, Jul 9, 8:45 AM PDT · 14320 days ago · 1 km deep · 5 km away
3. 2.06 km W of Cobb, CaliforniaThu, Jul 9, 9:20 AM PDT · 14320 days ago · 4 km deep · 2 km away
4. 1.96 km WSW of Cobb, CaliforniaFri, Jul 10, 12:45 PM PDT · 14319 days ago · 4 km deep · 3 km away
5. 1.912 km WSW of Hopland, CaliforniaFri, Jul 10, 4:16 PM PDT · 14319 days ago · 1 km deep · 41 km away
6. 2.17 km WSW of Cobb, CaliforniaSat, Jul 11, 1:00 PM PDT · 14318 days ago · 0 km deep · 3 km away
7. 2.19 km WSW of Cobb, CaliforniaSat, Jul 11, 5:17 PM PDT · 14318 days ago · 1 km deep · 5 km away
8. 2.08 km W of Cobb, CaliforniaSat, Jul 11, 7:52 PM PDT · 14318 days ago · 0 km deep · 3 km away
9. 2.19 km WSW of Cobb, CaliforniaSat, Jul 11, 8:20 PM PDT · 14318 days ago · 2 km deep · 5 km away
10. 1.99 km NNE of Brooktrails, CaliforniaSun, Jul 12, 11:31 PM PDT · 14317 days ago · 9 km deep · 90 km away
11. 1.54 km SW of Cobb, CaliforniaMon, Jul 13, 12:23 AM PDT · 14317 days ago · 0 km deep · 4 km away
12. 2.16 km WSW of Cobb, CaliforniaMon, Jul 13, 12:24 PM PDT · 14316 days ago · 3 km deep · 2 km away
13. 1.93 km NNW of Cloverdale, CaliforniaMon, Jul 13, 6:13 PM PDT · 14316 days ago · -1 km deep · 21 km away
14. 1.86 km W of Cobb, CaliforniaMon, Jul 13, 6:15 PM PDT · 14316 days ago · -1 km deep · 3 km away
15. 1.73 km W of Cobb, CaliforniaTue, Jul 14, 9:40 AM PDT · 14315 days ago · -1 km deep · 1 km away
16. 2.06 km W of Cobb, CaliforniaTue, Jul 14, 10:57 AM PDT · 14315 days ago · 3 km deep · 2 km away
17. 1.84 km W of Cobb, CaliforniaTue, Jul 14, 12:29 PM PDT · 14315 days ago · 0 km deep · 0 km away
18. 2.58 km W of Cobb, CaliforniaTue, Jul 14, 5:57 PM PDT · 14315 days ago · 0 km deep · 4 km away
19. 1.88 km W of Cobb, CaliforniaTue, Jul 14, 6:00 PM PDT · 14315 days ago · -1 km deep · 4 km away
20. 1.68 km W of Cobb, CaliforniaTue, Jul 14, 7:06 PM PDT · 14315 days ago · 1 km deep · 4 km away
21. 2.27 km WSW of Cobb, CaliforniaTue, Jul 14, 10:50 PM PDT · 14315 days ago · 0 km deep · 3 km away
22. 1.84 km WNW of Cobb, CaliforniaWed, Jul 15, 5:50 AM PDT · 14314 days ago · 2 km deep · 0 km away
23. 1.74 km WNW of Cobb, CaliforniaWed, Jul 15, 5:51 AM PDT · 14314 days ago · 2 km deep · 1 km away
24. 1.65 km SSW of Cobb, CaliforniaWed, Jul 15, 6:28 PM PDT · 14314 days ago · 3 km deep · 6 km away
25. 2.16 km WSW of Cobb, CaliforniaThu, Jul 16, 2:52 AM PDT · 14314 days ago · 1 km deep · 2 km away
26. 1.78 km W of Cobb, CaliforniaThu, Jul 16, 4:12 PM PDT · 14313 days ago · 2 km deep · 4 km away
27. 1.77 km W of Cobb, CaliforniaThu, Jul 16, 6:31 PM PDT · 14313 days ago · 3 km deep · 3 km away
28. 1.85 km SW of Cobb, CaliforniaFri, Jul 17, 3:29 AM PDT · 14312 days ago · -1 km deep · 6 km away
29. 2.45 km SW of Cobb, CaliforniaFri, Jul 17, 12:39 PM PDT · 14312 days ago · 2 km deep · 5 km away
30. 1.64 km N of Cloverdale, CaliforniaFri, Jul 17, 5:58 PM PDT · 14312 days ago · 4 km deep · 21 km away
31. 2.09 km W of Cobb, CaliforniaFri, Jul 17, 7:27 PM PDT · 14312 days ago · -1 km deep · 4 km away
32. 1.79 km W of Cobb, CaliforniaFri, Jul 17, 7:29 PM PDT · 14312 days ago · -1 km deep · 5 km away
33. 2.15 km W of Cobb, CaliforniaFri, Jul 17, 7:36 PM PDT · 14312 days ago · 0 km deep · 1 km away
34. 1.76 km WSW of Cobb, CaliforniaFri, Jul 17, 8:37 PM PDT · 14312 days ago · 0 km deep · 2 km away
35. 1.65 km SSW of Cobb, CaliforniaFri, Jul 17, 11:33 PM PDT · 14312 days ago · 4 km deep · 7 km away
36. 1.76 km WSW of Cobb, CaliforniaSat, Jul 18, 12:14 AM PDT · 14312 days ago · 1 km deep · 3 km away
37. 1.68 km WSW of Cobb, CaliforniaSun, Jul 19, 4:01 AM PDT · 14310 days ago · 3 km deep · 5 km away
38. 1.817 km NNE of Angwin, CaliforniaSun, Jul 19, 1:55 PM PDT · 14310 days ago · 6 km deep · 36 km away
39. 1.66 km W of Cobb, CaliforniaMon, Jul 20, 9:01 AM PDT · 14309 days ago · 2 km deep · 2 km away
40. 1.95 km W of Cobb, CaliforniaMon, Jul 20, 9:15 AM PDT · 14309 days ago · -1 km deep · 2 km away
41. 1.66 km W of Cobb, CaliforniaMon, Jul 20, 3:26 PM PDT · 14309 days ago · 1 km deep · 1 km away
42. 2.55 km WSW of Cobb, CaliforniaMon, Jul 20, 6:00 PM PDT · 14309 days ago · 0 km deep · 3 km away
43. 2.04 km SW of Cobb, CaliforniaMon, Jul 20, 6:00 PM PDT · 14309 days ago · 42 km deep · 4 km away
44. 1.93 km NW of Hidden Valley Lake, CaliforniaTue, Jul 21, 10:48 AM PDT · 14308 days ago · 22 km deep · 17 km away
45. 2.57 km W of Cobb, CaliforniaTue, Jul 21, 1:04 PM PDT · 14308 days ago · 1 km deep · 3 km away
46. 1.68 km W of Cobb, CaliforniaTue, Jul 21, 1:04 PM PDT · 14308 days ago · 1 km deep · 4 km away
47. 1.67 km W of Cobb, CaliforniaTue, Jul 21, 2:09 PM PDT · 14308 days ago · 1 km deep · 2 km away
48. 1.9Northern CaliforniaTue, Jul 21, 2:53 PM PDT · 14308 days ago · -1 km deep · 3 km away
49. 1.73 km ESE of Hopland, CaliforniaTue, Jul 21, 3:04 PM PDT · 14308 days ago · 1 km deep · 30 km away
50. 1.86 km SSW of Calistoga, CaliforniaWed, Jul 22, 8:52 AM PDT · 14307 days ago · 5 km deep · 38 km away
51. 1.74 km W of Cobb, CaliforniaWed, Jul 22, 1:03 PM PDT · 14307 days ago · 0 km deep · 0 km away
52. 1.66 km W of Middletown, CaliforniaWed, Jul 22, 1:23 PM PDT · 14307 days ago · -1 km deep · 11 km away
53. 3.16 km SW of Cobb, CaliforniaWed, Jul 22, 3:05 PM PDT · 14307 days ago · 0 km deep · 5 km away
54. 2.1Northern CaliforniaWed, Jul 22, 9:28 PM PDT · 14307 days ago · 3 km deep · 3 km away
55. 1.8Northern CaliforniaThu, Jul 23, 6:54 AM PDT · 14306 days ago · 0 km deep · 4 km away
56. 1.86 km W of Cobb, CaliforniaThu, Jul 23, 1:11 PM PDT · 14306 days ago · 1 km deep · 1 km away
57. 1.95 km WSW of Cobb, CaliforniaThu, Jul 23, 3:22 PM PDT · 14306 days ago · -1 km deep · 3 km away
58. 1.87 km W of Cobb, CaliforniaThu, Jul 23, 4:45 PM PDT · 14306 days ago · 1 km deep · 3 km away
59. 1.78 km W of Cobb, CaliforniaThu, Jul 23, 5:34 PM PDT · 14306 days ago · 0 km deep · 3 km away
60. 1.67 km WSW of Cobb, CaliforniaThu, Jul 23, 9:23 PM PDT · 14306 days ago · 3 km deep · 4 km away

The first 60 of 167.

From the USGS Earthquake Hazards Program and its partner networks, event nc102308. Read Tue, Sep 22, 2026, 9:38 PM UTC.