M2.5 earthquake 5 km SW of Cobb, California

Magnitude

2.5 (md), micro

Local time

Wed, Oct 9, 1985, 5:09 PM PDT

UTC

1985-10-10 00:09:40 UTC

Depth

0.1 km (0.1 mi), shallow

Epicenter

38.785° N, 122.768° W

Region

California

Tsunami flag

No

Status

Reviewed by a seismologist

Location uncertainty

About 0.1 km horizontally, 0.3 km in depth

Magnitude uncertainty

±0.12

Depth from

From location

Station coverage gap

38°

Stations used

29

• Cobb, CaliforniaPopulation 1,778. Forecast6 kmSW
• Healdsburg, CaliforniaPopulation 11,742. Forecast21 kmNNE
• Santa Rosa, CaliforniaPopulation 178,127. Forecast39 kmN
• Los Angeles, CaliforniaPopulation 3,820,914. Forecast664 kmNW

After

1. 1.910 km WSW of Cobb, CaliforniaFri, Oct 25, 2:39 PM PDT · 14942 days ago · 2 km deep · 6 km away
2. 1.84 km WSW of Cobb, CaliforniaFri, Oct 25, 3:15 PM PDT · 14942 days ago · 1 km deep · 2 km away
3. 1.66 km SW of Cobb, CaliforniaFri, Oct 25, 3:53 PM PDT · 14942 days ago · 0 km deep · 1 km away
4. 1.527 km NNE of Potter Valley, CaliforniaFri, Oct 25, 6:59 PM PDT · 14942 days ago · 9 km deep · 87 km away
5. 1.85 km SW of Cobb, CaliforniaFri, Oct 25, 8:53 PM PDT · 14942 days ago · -1 km deep · 0 km away
6. 1.85 km SW of Cobb, CaliforniaSat, Oct 26, 5:33 AM PDT · 14941 days ago · 1 km deep · 1 km away
7. 2.59 km W of Hopland, CaliforniaSat, Oct 26, 9:13 AM PDT · 14941 days ago · 5 km deep · 44 km away
8. 1.67 km W of Cobb, CaliforniaSat, Oct 26, 10:50 AM PDT · 14941 days ago · 4 km deep · 5 km away
9. 1.67 km WSW of Cobb, CaliforniaSat, Oct 26, 5:10 PM PDT · 14941 days ago · 2 km deep · 3 km away
10. 1.95 km SW of Cobb, CaliforniaSat, Oct 26, 8:35 PM PDT · 14941 days ago · -1 km deep · 1 km away
11. 1.65 km W of Arbuckle, CaliforniaSun, Oct 27, 9:31 AM PST · 14940 days ago · 8 km deep · 61 km away
12. 1.718 km NNE of Nice, CaliforniaSun, Oct 27, 12:14 PM PST · 14940 days ago · 10 km deep · 53 km away
13. 1.910 km WSW of Arbuckle, CaliforniaSun, Oct 27, 8:39 PM PST · 14940 days ago · 13 km deep · 56 km away
14. 1.710 km W of Cobb, CaliforniaMon, Oct 28, 4:29 PM PST · 14939 days ago · 1 km deep · 7 km away
15. 1.68 km W of Cobb, CaliforniaTue, Oct 29, 5:55 PM PST · 14938 days ago · 0 km deep · 6 km away
16. 1.68 km W of Cobb, CaliforniaTue, Oct 29, 5:57 PM PST · 14938 days ago · 1 km deep · 6 km away
17. 2.48 km NE of Hidden Valley Lake, CaliforniaWed, Oct 30, 9:30 PM PST · 14936 days ago · 1 km deep · 25 km away
18. 2.06 km WSW of Cobb, CaliforniaThu, Oct 31, 6:28 AM PST · 14936 days ago · 1 km deep · 3 km away
19. 1.74 km WSW of Cobb, CaliforniaThu, Oct 31, 11:39 AM PST · 14936 days ago · 1 km deep · 3 km away
20. 2.418 km E of Potter Valley, CaliforniaFri, Nov 1, 1:43 AM PST · 14935 days ago · 6 km deep · 64 km away
21. 2.28 km NE of Hidden Valley Lake, CaliforniaFri, Nov 1, 1:59 AM PST · 14935 days ago · 0 km deep · 25 km away
22. 2.67 km WSW of Cobb, CaliforniaFri, Nov 1, 6:13 AM PST · 14935 days ago · 0 km deep · 4 km away
23. 1.67 km W of Cobb, CaliforniaFri, Nov 1, 9:10 PM PST · 14935 days ago · 3 km deep · 5 km away
24. 2.18 km W of Cobb, CaliforniaFri, Nov 1, 11:24 PM PST · 14934 days ago · -1 km deep · 6 km away
25. 2.28 km W of Cobb, CaliforniaFri, Nov 1, 11:24 PM PST · 14934 days ago · -1 km deep · 6 km away
26. 1.79 km NNE of Brooktrails, CaliforniaSat, Nov 2, 7:29 AM PST · 14934 days ago · 8 km deep · 95 km away
27. 1.86 km SW of Cobb, CaliforniaSat, Nov 2, 1:06 PM PST · 14934 days ago · 1 km deep · 1 km away
28. 2.55 km SW of Cobb, CaliforniaSun, Nov 3, 5:53 AM PST · 14933 days ago · 1 km deep · 1 km away
29. 1.78 km NE of Hopland, CaliforniaSun, Nov 3, 3:08 PM PST · 14933 days ago · 5 km deep · 37 km away
30. 1.81 km N of Calpella, CaliforniaMon, Nov 4, 12:04 AM PST · 14932 days ago · 7 km deep · 64 km away
31. 1.714 km NE of Potter Valley, CaliforniaMon, Nov 4, 9:03 AM PST · 14932 days ago · 6 km deep · 70 km away
32. 2.07 km WSW of Cobb, CaliforniaWed, Nov 6, 6:28 PM PST · 14930 days ago · 2 km deep · 4 km away
33. 2.36 km W of Cobb, CaliforniaWed, Nov 6, 7:21 PM PST · 14930 days ago · 4 km deep · 5 km away
34. 1.65 km WSW of Cobb, CaliforniaThu, Nov 7, 7:52 AM PST · 14929 days ago · 0 km deep · 1 km away
35. 1.57 km ENE of Penngrove, CaliforniaThu, Nov 7, 11:45 AM PST · 14929 days ago · 8 km deep · 53 km away
36. 1.83 km SW of Cobb, CaliforniaThu, Nov 7, 12:45 PM PST · 14929 days ago · 1 km deep · 2 km away
37. 1.84 km W of Upper Lake, CaliforniaThu, Nov 7, 1:04 PM PST · 14929 days ago · 5 km deep · 46 km away
38. 1.57 km W of Cobb, CaliforniaThu, Nov 7, 3:54 PM PST · 14929 days ago · 3 km deep · 5 km away
39. 2.23 km WSW of Green Valley, CaliforniaThu, Nov 7, 7:18 PM PST · 14929 days ago · 7 km deep · 78 km away
40. 1.91 km ENE of Green Valley, CaliforniaThu, Nov 7, 7:26 PM PST · 14929 days ago · 12 km deep · 80 km away
41. 1.91 km SW of Lakeport, CaliforniaThu, Nov 7, 8:08 PM PST · 14929 days ago · 22 km deep · 31 km away
42. 1.56 km W of Cobb, CaliforniaThu, Nov 7, 9:59 PM PST · 14928 days ago · 3 km deep · 5 km away
43. 2.07 km W of Cobb, CaliforniaFri, Nov 8, 1:48 AM PST · 14928 days ago · 0 km deep · 6 km away
44. 3.19 km W of Cobb, CaliforniaFri, Nov 8, 5:12 AM PST · 14928 days ago · 1 km deep · 6 km away
45. 3.09 km W of Cobb, CaliforniaFri, Nov 8, 5:12 AM PST · 14928 days ago · -1 km deep · 8 km away
46. 2.29 km W of Cobb, CaliforniaFri, Nov 8, 5:16 AM PST · 14928 days ago · 1 km deep · 6 km away
47. 2.09 km W of Cobb, CaliforniaFri, Nov 8, 5:16 AM PST · 14928 days ago · 0 km deep · 7 km away
48. 1.99 km W of Cobb, CaliforniaFri, Nov 8, 5:17 AM PST · 14928 days ago · 0 km deep · 7 km away
49. 2.48 km W of Cobb, CaliforniaFri, Nov 8, 5:19 AM PST · 14928 days ago · 0 km deep · 6 km away
50. 1.85 km WSW of Cobb, CaliforniaFri, Nov 8, 8:15 AM PST · 14928 days ago · 1 km deep · 2 km away
51. 1.75 km W of Cobb, CaliforniaFri, Nov 8, 3:00 PM PST · 14928 days ago · 1 km deep · 4 km away
52. 1.77 km W of Cobb, CaliforniaFri, Nov 8, 8:30 PM PST · 14928 days ago · 3 km deep · 5 km away
53. 1.56 km SW of Cobb, CaliforniaSat, Nov 9, 7:30 AM PST · 14927 days ago · 0 km deep · 1 km away
54. 1.823 km SE of Covelo, CaliforniaSat, Nov 9, 7:34 AM PST · 14927 days ago · 5 km deep · 97 km away
55. 2.06 km WSW of Calistoga, CaliforniaSat, Nov 9, 4:21 PM PST · 14927 days ago · -1 km deep · 26 km away
56. 2.07 km WSW of Calistoga, CaliforniaSat, Nov 9, 4:25 PM PST · 14927 days ago · 0 km deep · 28 km away
57. 1.85 km WNW of Cobb, CaliforniaSun, Nov 10, 5:37 AM PST · 14926 days ago · 2 km deep · 6 km away
58. 1.69 km W of Cobb, CaliforniaSun, Nov 10, 11:45 AM PST · 14926 days ago · 0 km deep · 6 km away
59. 1.75 km WSW of Cobb, CaliforniaMon, Nov 11, 7:22 PM PST · 14925 days ago · 0 km deep · 2 km away
60. 1.96 km SW of Cobb, CaliforniaTue, Nov 12, 12:06 AM PST · 14924 days ago · 1 km deep · 1 km away

The first 60 of 176.

From the USGS Earthquake Hazards Program and its partner networks, event nc56587. Read Tue, Sep 22, 2026, 4:54 PM UTC.