M1.9 earthquake 9 km W of Cobb, California

Magnitude

1.9 (md), micro

Local time

Sun, Sep 22, 1985, 4:21 PM PDT

UTC

1985-09-22 23:21:01 UTC

Depth

0.5 km (0.3 mi), shallow

Epicenter

38.820° N, 122.837° W

Region

California

Tsunami flag

No

Status

Reviewed by a seismologist

Location uncertainty

About 0.2 km horizontally, 0.4 km in depth

Magnitude uncertainty

±0.15

Depth from

From location

Station coverage gap

38°

Stations used

23

• Cobb, CaliforniaPopulation 1,778. Forecast10 kmW
• Healdsburg, CaliforniaPopulation 11,742. Forecast23 kmN
• Santa Rosa, CaliforniaPopulation 178,127. Forecast43 kmNNW
• Los Angeles, CaliforniaPopulation 3,820,914. Forecast671 kmNW

After

1. 1.65 km SW of Cobb, CaliforniaSun, Sep 29, 7:24 AM PDT · 14968 days ago · 1 km deep · 6 km away
2. 2.019 km N of Upper Lake, CaliforniaSun, Sep 29, 3:36 PM PDT · 14968 days ago · 5 km deep · 57 km away
3. 1.89 km W of Cobb, CaliforniaTue, Oct 1, 1:33 AM PDT · 14966 days ago · 0 km deep · 1 km away
4. 1.74 km WSW of Cobb, CaliforniaTue, Oct 1, 3:47 PM PDT · 14966 days ago · 1 km deep · 6 km away
5. 2.411 km SSE of Laytonville, CaliforniaWed, Oct 2, 3:08 AM PDT · 14965 days ago · 2 km deep · 100 km away
6. 1.98 km WSW of Cobb, CaliforniaWed, Oct 2, 2:56 PM PDT · 14965 days ago · 1 km deep · 3 km away
7. 1.64 km SE of Larkfield-Wikiup, CaliforniaWed, Oct 2, 6:13 PM PDT · 14965 days ago · 8 km deep · 38 km away
8. 1.812 km WNW of Calistoga, CaliforniaWed, Oct 2, 9:48 PM PDT · 14964 days ago · 8 km deep · 24 km away
9. 2.58 km W of Cobb, CaliforniaFri, Oct 4, 2:11 AM PDT · 14963 days ago · 1 km deep · 1 km away
10. 1.64 km NW of Redwood Valley, CaliforniaFri, Oct 4, 10:40 AM PDT · 14963 days ago · 7 km deep · 63 km away
11. 2.34 km WSW of Cobb, CaliforniaFri, Oct 4, 10:58 AM PDT · 14963 days ago · 1 km deep · 6 km away
12. 1.711 km NW of Moskowite Corner, CaliforniaSat, Oct 5, 1:27 AM PDT · 14962 days ago · 4 km deep · 59 km away
13. 2.25 km WSW of Cobb, CaliforniaSat, Oct 5, 1:38 PM PDT · 14962 days ago · 1 km deep · 5 km away
14. 1.86 km SSE of Moskowite Corner, CaliforniaSat, Oct 5, 3:45 PM PDT · 14962 days ago · 5 km deep · 75 km away
15. 2.24 km W of Cobb, CaliforniaSun, Oct 6, 3:30 AM PDT · 14961 days ago · 0 km deep · 5 km away
16. 3.28 km SE of Hopland, CaliforniaSun, Oct 6, 2:29 PM PDT · 14961 days ago · 4 km deep · 21 km away
17. 1.58 km SE of Hopland, CaliforniaSun, Oct 6, 5:09 PM PDT · 14961 days ago · 1 km deep · 21 km away
18. 1.613 km SSE of Boonville, CaliforniaMon, Oct 7, 3:33 AM PDT · 14960 days ago · -1 km deep · 41 km away
19. 2.48 km SE of Hopland, CaliforniaMon, Oct 7, 7:42 AM PDT · 14960 days ago · 2 km deep · 21 km away
20. 2.78 km NW of Redwood Valley, CaliforniaMon, Oct 7, 8:39 AM PDT · 14960 days ago · -1 km deep · 68 km away
21. 2.56 km W of Cobb, CaliforniaMon, Oct 7, 12:09 PM PDT · 14960 days ago · 3 km deep · 3 km away
22. 1.98 km SE of Hopland, CaliforniaMon, Oct 7, 1:23 PM PDT · 14960 days ago · 1 km deep · 21 km away
23. 1.88 km WSW of Cobb, CaliforniaMon, Oct 7, 8:01 PM PDT · 14960 days ago · 3 km deep · 4 km away
24. 1.8Northern CaliforniaTue, Oct 8, 4:09 AM PDT · 14959 days ago · 0 km deep · 2 km away
25. 2.28 km W of Cobb, CaliforniaTue, Oct 8, 6:13 AM PDT · 14959 days ago · 0 km deep · 2 km away
26. 2.55 km SW of Cobb, CaliforniaWed, Oct 9, 5:09 PM PDT · 14958 days ago · 0 km deep · 7 km away
27. 1.95 km SW of Cobb, CaliforniaWed, Oct 9, 5:15 PM PDT · 14958 days ago · 0 km deep · 7 km away
28. 1.65 km W of Cobb, CaliforniaWed, Oct 9, 8:57 PM PDT · 14957 days ago · 0 km deep · 5 km away
29. 1.57 km WSW of Cobb, CaliforniaThu, Oct 10, 8:57 AM PDT · 14957 days ago · 1 km deep · 5 km away
30. 2.112 km NNW of Potter Valley, CaliforniaThu, Oct 10, 5:02 PM PDT · 14957 days ago · 5 km deep · 73 km away
31. 2.05 km SW of Cobb, CaliforniaThu, Oct 10, 11:50 PM PDT · 14956 days ago · 2 km deep · 6 km away
32. 1.97 km NNE of Upper Lake, CaliforniaFri, Oct 11, 7:57 AM PDT · 14956 days ago · 7 km deep · 46 km away
33. 2.67 km WSW of Glen Ellen, CaliforniaFri, Oct 11, 9:37 AM PDT · 14956 days ago · 8 km deep · 58 km away
34. 2.04 km WSW of Cobb, CaliforniaFri, Oct 11, 5:50 PM PDT · 14956 days ago · 1 km deep · 6 km away
35. 2.05 km WNW of Cobb, CaliforniaSun, Oct 13, 2:22 PM PDT · 14954 days ago · 2 km deep · 6 km away
36. 2.46 km WSW of Cobb, CaliforniaSun, Oct 13, 9:11 PM PDT · 14953 days ago · -1 km deep · 4 km away
37. 1.67 km WSW of Cobb, CaliforniaSun, Oct 13, 9:13 PM PDT · 14953 days ago · 1 km deep · 3 km away
38. 1.820 km ENE of Clearlake, CaliforniaMon, Oct 14, 4:34 AM PDT · 14953 days ago · 6 km deep · 44 km away
39. 1.66 km W of Cobb, CaliforniaMon, Oct 14, 5:17 AM PDT · 14953 days ago · 3 km deep · 4 km away
40. 1.55 km WSW of Cobb, CaliforniaMon, Oct 14, 5:57 AM PDT · 14953 days ago · 1 km deep · 5 km away
41. 1.818 km E of Potter Valley, CaliforniaMon, Oct 14, 1:57 PM PDT · 14953 days ago · 6 km deep · 59 km away
42. 1.66 km WSW of Cobb, CaliforniaMon, Oct 14, 7:26 PM PDT · 14953 days ago · 4 km deep · 4 km away
43. 1.77 km WSW of Cobb, CaliforniaTue, Oct 15, 2:23 AM PDT · 14952 days ago · 1 km deep · 3 km away
44. 1.76 km ENE of Willits, CaliforniaTue, Oct 15, 8:25 PM PDT · 14952 days ago · 4 km deep · 78 km away
45. 1.78 km WSW of Cobb, CaliforniaTue, Oct 15, 9:15 PM PDT · 14951 days ago · 4 km deep · 4 km away
46. 1.86 km W of Cobb, CaliforniaWed, Oct 16, 6:41 AM PDT · 14951 days ago · 0 km deep · 3 km away
47. 2.06 km W of Cobb, CaliforniaWed, Oct 16, 3:18 PM PDT · 14951 days ago · 0 km deep · 4 km away
48. 1.97 km WSW of Cobb, CaliforniaThu, Oct 17, 12:58 AM PDT · 14950 days ago · 4 km deep · 4 km away
49. 1.611 km SSE of Laytonville, CaliforniaThu, Oct 17, 9:32 AM PDT · 14950 days ago · 3 km deep · 100 km away
50. 2.38 km W of Cobb, CaliforniaThu, Oct 17, 3:24 PM PDT · 14950 days ago · 1 km deep · 1 km away
51. 1.96 km W of Cobb, CaliforniaThu, Oct 17, 7:07 PM PDT · 14950 days ago · 1 km deep · 3 km away
52. 2.27 km W of Cobb, CaliforniaFri, Oct 18, 6:27 PM PDT · 14949 days ago · 4 km deep · 3 km away
53. 1.76 km W of Cobb, CaliforniaSat, Oct 19, 2:49 AM PDT · 14948 days ago · 2 km deep · 3 km away
54. 1.67 km WSW of Cobb, CaliforniaSat, Oct 19, 4:12 AM PDT · 14948 days ago · 0 km deep · 3 km away
55. 1.75 km SW of Cobb, CaliforniaSat, Oct 19, 5:43 PM PDT · 14948 days ago · 1 km deep · 6 km away
56. 1.86 km WSW of Cobb, CaliforniaSat, Oct 19, 6:17 PM PDT · 14948 days ago · 3 km deep · 4 km away
57. 1.75 km W of Cobb, CaliforniaSun, Oct 20, 7:51 AM PDT · 14947 days ago · 0 km deep · 4 km away
58. 2.03 km SW of Cobb, CaliforniaSun, Oct 20, 11:24 AM PDT · 14947 days ago · 2 km deep · 8 km away
59. 3.46 km W of Cobb, CaliforniaSun, Oct 20, 12:26 PM PDT · 14947 days ago · 3 km deep · 4 km away
60. 1.94 km WSW of Cobb, CaliforniaSun, Oct 20, 12:28 PM PDT · 14947 days ago · 0 km deep · 6 km away

The first 60 of 173.

From the USGS Earthquake Hazards Program and its partner networks, event nc55625. Read Tue, Sep 22, 2026, 3:20 PM UTC.