M2.0 earthquake 9 km W of Cobb, California

Magnitude

2.0 (md), micro

Local time

Thu, Mar 21, 1985, 2:36 AM PST

UTC

1985-03-21 10:36:15 UTC

Depth

1.9 km (1.2 mi), shallow

Epicenter

38.814° N, 122.833° W

Region

California

Tsunami flag

No

Status

Reviewed by a seismologist

Location uncertainty

About 0.2 km horizontally, 0.5 km in depth

Magnitude uncertainty

±0.11

Depth from

From location

Station coverage gap

81°

Stations used

20

• 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. Forecast670 kmNW

After

1. 1.67 km W of Cobb, CaliforniaSat, Mar 30, 4:48 PM PST · 15151 days ago · 3 km deep · 2 km away
2. 1.65 km SW of Cobb, CaliforniaSat, Mar 30, 5:10 PM PST · 15151 days ago · 0 km deep · 6 km away
3. 1.62 km SW of Cobb, CaliforniaSat, Mar 30, 9:19 PM PST · 15150 days ago · -1 km deep · 8 km away
4. 1.75 km W of Cobb, CaliforniaSat, Mar 30, 10:05 PM PST · 15150 days ago · 0 km deep · 4 km away
5. 1.67 km W of Cobb, CaliforniaSun, Mar 31, 12:07 AM PST · 15150 days ago · 3 km deep · 2 km away
6. 1.78 km W of Cobb, CaliforniaSun, Mar 31, 10:31 AM PST · 15150 days ago · 1 km deep · 2 km away
7. 1.6Northern CaliforniaSun, Mar 31, 11:05 AM PST · 15150 days ago · 9 km deep · 49 km away
8. 2.56 km E of Santa Rosa, CaliforniaSun, Mar 31, 7:48 PM PST · 15150 days ago · 1 km deep · 46 km away
9. 1.66 km WSW of Cobb, CaliforniaMon, Apr 1, 5:55 AM PST · 15149 days ago · 3 km deep · 3 km away
10. 3.220 km WSW of Williams, CaliforniaMon, Apr 1, 6:09 AM PST · 15149 days ago · 5 km deep · 51 km away
11. 1.719 km WSW of Williams, CaliforniaMon, Apr 1, 6:25 AM PST · 15149 days ago · 2 km deep · 52 km away
12. 2.420 km WSW of Williams, CaliforniaMon, Apr 1, 9:17 AM PST · 15149 days ago · 1 km deep · 52 km away
13. 1.617 km W of Williams, CaliforniaMon, Apr 1, 9:17 AM PST · 15149 days ago · 3 km deep · 55 km away
14. 1.56 km ESE of Hopland, CaliforniaMon, Apr 1, 12:17 PM PST · 15149 days ago · 1 km deep · 24 km away
15. 2.220 km WSW of Williams, CaliforniaMon, Apr 1, 7:57 PM PST · 15149 days ago · 6 km deep · 51 km away
16. 2.520 km WSW of Williams, CaliforniaMon, Apr 1, 7:59 PM PST · 15149 days ago · 5 km deep · 51 km away
17. 1.57 km WSW of Cobb, CaliforniaMon, Apr 1, 8:13 PM PST · 15148 days ago · 5 km deep · 4 km away
18. 1.64 km W of Cobb, CaliforniaMon, Apr 1, 9:49 PM PST · 15148 days ago · -1 km deep · 5 km away
19. 2.417 km WSW of Williams, CaliforniaTue, Apr 2, 8:14 AM PST · 15148 days ago · 5 km deep · 55 km away
20. 3.15 km WSW of Cobb, CaliforniaWed, Apr 3, 12:39 AM PST · 15147 days ago · 0 km deep · 5 km away
21. 1.95 km W of Cobb, CaliforniaWed, Apr 3, 4:06 AM PST · 15147 days ago · 0 km deep · 5 km away
22. 1.95 km SW of Cobb, CaliforniaThu, Apr 4, 12:43 AM PST · 15146 days ago · 0 km deep · 5 km away
23. 2.219 km WSW of Williams, CaliforniaThu, Apr 4, 3:36 AM PST · 15146 days ago · 4 km deep · 52 km away
24. 2.120 km WSW of Williams, CaliforniaThu, Apr 4, 3:59 AM PST · 15146 days ago · 2 km deep · 51 km away
25. 2.18 km WSW of Cobb, CaliforniaThu, Apr 4, 12:38 PM PST · 15146 days ago · 3 km deep · 3 km away
26. 1.76 km W of Cobb, CaliforniaThu, Apr 4, 1:36 PM PST · 15146 days ago · 3 km deep · 3 km away
27. 1.97 km WSW of Cobb, CaliforniaThu, Apr 4, 4:46 PM PST · 15146 days ago · 1 km deep · 3 km away
28. 1.94 km N of Larkfield-Wikiup, CaliforniaThu, Apr 4, 5:00 PM PST · 15146 days ago · 3 km deep · 30 km away
29. 2.67 km WSW of Cobb, CaliforniaFri, Apr 5, 1:34 AM PST · 15145 days ago · 0 km deep · 3 km away
30. 2.27 km NNE of Elk Creek, CaliforniaFri, Apr 5, 4:55 AM PST · 15145 days ago · 12 km deep · 99 km away
31. 1.68 km W of Cobb, CaliforniaFri, Apr 5, 4:11 PM PST · 15145 days ago · 1 km deep · 1 km away
32. 2.04 km NNW of Larkfield-Wikiup, CaliforniaFri, Apr 5, 4:52 PM PST · 15145 days ago · 3 km deep · 30 km away
33. 1.94 km W of Cobb, CAFri, Apr 5, 6:40 PM PST · 15145 days ago · 0 km deep · 6 km away
34. 2.09 km N of Upper Lake, CaliforniaFri, Apr 5, 11:05 PM PST · 15144 days ago · 4 km deep · 49 km away
35. 2.63 km SSE of Clear Lake Riviera, CaliforniaSat, Apr 6, 1:25 AM PST · 15144 days ago · 2 km deep · 17 km away
36. 1.72 km SSE of Clear Lake Riviera, CaliforniaSat, Apr 6, 1:25 AM PST · 15144 days ago · 1 km deep · 17 km away
37. 1.56 km WSW of Cobb, CaliforniaSat, Apr 6, 6:31 AM PST · 15144 days ago · 0 km deep · 4 km away
38. 2.15 km WSW of Cobb, CaliforniaSat, Apr 6, 6:32 AM PST · 15144 days ago · 1 km deep · 4 km away
39. 1.66 km WSW of Cobb, CaliforniaSat, Apr 6, 3:43 PM PST · 15144 days ago · -1 km deep · 4 km away
40. 1.75 km W of Cobb, CaliforniaSat, Apr 6, 11:17 PM PST · 15143 days ago · 1 km deep · 4 km away
41. 3.114 km N of Brooktrails, CaliforniaSun, Apr 7, 9:06 AM PST · 15143 days ago · -1 km deep · 96 km away
42. 1.820 km WSW of Williams, CaliforniaSun, Apr 7, 1:57 PM PST · 15143 days ago · 4 km deep · 50 km away
43. 2.55 km N of Windsor, CaliforniaMon, Apr 8, 12:00 AM PST · 15142 days ago · 5 km deep · 24 km away
44. 3.16 km W of Cobb, CaliforniaMon, Apr 8, 12:03 AM PST · 15142 days ago · 4 km deep · 3 km away
45. 1.78 km W of Cobb, CaliforniaMon, Apr 8, 12:04 AM PST · 15142 days ago · 0 km deep · 1 km away
46. 1.96 km W of Cobb, CaliforniaMon, Apr 8, 12:06 AM PST · 15142 days ago · 0 km deep · 3 km away
47. 2.15 km SW of Cobb, CaliforniaMon, Apr 8, 8:01 AM PST · 15142 days ago · 1 km deep · 6 km away
48. 1.76 km W of Cobb, CaliforniaMon, Apr 8, 6:52 PM PST · 15142 days ago · 3 km deep · 3 km away
49. 1.96 km W of Cobb, CaliforniaMon, Apr 8, 10:17 PM PST · 15141 days ago · 3 km deep · 3 km away
50. 2.26 km W of Cobb, CaliforniaTue, Apr 9, 2:49 AM PST · 15141 days ago · 3 km deep · 4 km away
51. 3.26 km WSW of Cobb, CaliforniaTue, Apr 9, 3:49 AM PST · 15141 days ago · 4 km deep · 3 km away
52. 2.16 km WSW of Cobb, CaliforniaTue, Apr 9, 3:50 AM PST · 15141 days ago · 3 km deep · 4 km away
53. 1.56 km WSW of Cobb, CaliforniaTue, Apr 9, 3:50 AM PST · 15141 days ago · 4 km deep · 4 km away
54. 1.513 km ESE of Hidden Valley Lake, CaliforniaTue, Apr 9, 5:08 AM PST · 15141 days ago · 5 km deep · 36 km away
55. 2.08 km WSW of Cobb, CaliforniaTue, Apr 9, 10:21 AM PST · 15141 days ago · 4 km deep · 4 km away
56. 1.67 km WSW of Cobb, CaliforniaTue, Apr 9, 1:08 PM PST · 15141 days ago · 1 km deep · 3 km away
57. 2.24 km SW of Cobb, CaliforniaWed, Apr 10, 8:07 AM PST · 15140 days ago · 1 km deep · 7 km away
58. 2.29 km WSW of Cobb, CaliforniaWed, Apr 10, 2:34 PM PST · 15140 days ago · 1 km deep · 2 km away
59. 2.67 km WSW of Cobb, CaliforniaFri, Apr 12, 12:41 PM PST · 15138 days ago · 1 km deep · 3 km away
60. 2.57 km WSW of Cobb, CaliforniaFri, Apr 12, 12:43 PM PST · 15138 days ago · 1 km deep · 3 km away

The first 60 of 179.

From the USGS Earthquake Hazards Program and its partner networks, event nc44425. Read Tue, Sep 22, 2026, 3:33 PM UTC.