M2.8 earthquake 6 km WSW of Cobb, California

Magnitude

2.8 (md), micro

Local time

Sat, May 11, 1985, 7:28 AM PDT

UTC

1985-05-11 14:28:18 UTC

Depth

-0.4 km (-0.3 mi), shallow

Epicenter

38.800° N, 122.793° W

Region

California

Tsunami flag

No

Status

Reviewed by a seismologist

Location uncertainty

About 0.2 km horizontally, 1.0 km in depth

Magnitude uncertainty

±0.12

Depth from

From location

Station coverage gap

36°

Stations used

32

• Cobb, CaliforniaPopulation 1,778. Forecast7 kmWSW
• Healdsburg, CaliforniaPopulation 11,742. Forecast22 kmNNE
• Santa Rosa, CaliforniaPopulation 178,127. Forecast41 kmN
• Los Angeles, CaliforniaPopulation 3,820,914. Forecast666 kmNW

After

1. 2.27 km WSW of Cobb, CaliforniaSat, May 11, 8:22 AM PDT · 15115 days ago · 1 km deep · 1 km away
2. 2.16 km W of Cobb, CaliforniaSat, May 11, 11:51 AM PDT · 15115 days ago · 3 km deep · 2 km away
3. 1.86 km W of Cobb, CaliforniaSun, May 12, 2:38 PM PDT · 15114 days ago · 3 km deep · 2 km away
4. 1.97 km W of Cobb, CaliforniaMon, May 13, 2:08 AM PDT · 15113 days ago · 1 km deep · 3 km away
5. 2.15 km ENE of Calpella, CaliforniaMon, May 13, 6:39 AM PDT · 15113 days ago · 6 km deep · 58 km away
6. 2.13 km SW of Cobb, CaliforniaMon, May 13, 4:59 PM PDT · 15113 days ago · 1 km deep · 4 km away
7. 1.619 km E of Potter Valley, CaliforniaMon, May 13, 7:10 PM PDT · 15113 days ago · 5 km deep · 62 km away
8. 2.17 km WSW of Cobb, CaliforniaMon, May 13, 8:30 PM PDT · 15112 days ago · 1 km deep · 1 km away
9. 1.94 km ENE of Calpella, CaliforniaMon, May 13, 9:22 PM PDT · 15112 days ago · 0 km deep · 58 km away
10. 2.67 km W of Cobb, CaliforniaTue, May 14, 5:07 AM PDT · 15112 days ago · 3 km deep · 2 km away
11. 1.68 km WSW of Cobb, CaliforniaTue, May 14, 9:04 AM PDT · 15112 days ago · 3 km deep · 2 km away
12. 1.617 km NE of Upper Lake, CaliforniaTue, May 14, 6:37 PM PDT · 15112 days ago · 4 km deep · 54 km away
13. 1.67 km W of Cobb, CaliforniaTue, May 14, 6:55 PM PDT · 15112 days ago · 0 km deep · 3 km away
14. 1.95 km SW of Cobb, CaliforniaTue, May 14, 11:54 PM PDT · 15111 days ago · 1 km deep · 4 km away
15. 2.07 km WSW of Cobb, CaliforniaWed, May 15, 5:04 AM PDT · 15111 days ago · 2 km deep · 2 km away
16. 1.56 km NW of Cobb, CaliforniaWed, May 15, 11:41 AM PDT · 15111 days ago · 1 km deep · 8 km away
17. 2.46 km W of Cobb, CaliforniaWed, May 15, 1:58 PM PDT · 15111 days ago · 3 km deep · 2 km away
18. 1.76 km W of Cobb, CaliforniaWed, May 15, 1:59 PM PDT · 15111 days ago · 3 km deep · 2 km away
19. 1.59 km W of Cobb, CaliforniaWed, May 15, 11:39 PM PDT · 15110 days ago · 1 km deep · 4 km away
20. 2.48 km WSW of Cobb, CaliforniaThu, May 16, 7:52 AM PDT · 15110 days ago · 3 km deep · 2 km away
21. 1.87 km WSW of Cobb, CaliforniaThu, May 16, 8:33 AM PDT · 15110 days ago · 3 km deep · 1 km away
22. 2.37 km WSW of Cobb, CaliforniaThu, May 16, 1:57 PM PDT · 15110 days ago · 4 km deep · 2 km away
23. 1.820 km ENE of Clearlake, CaliforniaThu, May 16, 8:29 PM PDT · 15109 days ago · 6 km deep · 42 km away
24. 1.67 km WSW of Cobb, CaliforniaThu, May 16, 10:28 PM PDT · 15109 days ago · 1 km deep · 1 km away
25. 2.14 km ENE of Hopland, CaliforniaFri, May 17, 12:57 AM PDT · 15109 days ago · 3 km deep · 32 km away
26. 2.08 km WSW of Cobb, CaliforniaFri, May 17, 1:25 AM PDT · 15109 days ago · 3 km deep · 1 km away
27. 1.612 km WSW of Williams, CAFri, May 17, 6:49 PM PDT · 15109 days ago · 7 km deep · 56 km away
28. 1.710 km WSW of Cobb, CaliforniaSat, May 18, 7:09 AM PDT · 15108 days ago · 1 km deep · 4 km away
29. 2.88 km WSW of Meridian, CaliforniaSat, May 18, 12:33 PM PDT · 15108 days ago · 0 km deep · 76 km away
30. 1.71 km ESE of Angwin, CaliforniaSat, May 18, 10:48 PM PDT · 15107 days ago · 8 km deep · 41 km away
31. 2.35 km W of Cobb, CaliforniaSun, May 19, 1:09 PM PDT · 15107 days ago · 0 km deep · 2 km away
32. 1.95 km W of Cobb, CaliforniaSun, May 19, 2:46 PM PDT · 15107 days ago · 0 km deep · 3 km away
33. 1.95 km W of Cobb, CaliforniaSun, May 19, 2:46 PM PDT · 15107 days ago · 0 km deep · 2 km away
34. 2.35 km W of Meridian, CaliforniaMon, May 20, 1:11 AM PDT · 15106 days ago · 9 km deep · 80 km away
35. 2.66 km SSW of Colusa, CaliforniaMon, May 20, 2:25 AM PDT · 15106 days ago · 21 km deep · 76 km away
36. 1.52 km N of Healdsburg, CaliforniaMon, May 20, 8:41 AM PDT · 15106 days ago · 4 km deep · 20 km away
37. 1.84 km SW of Albion, CaliforniaMon, May 20, 8:50 AM PDT · 15106 days ago · 1 km deep · 98 km away
38. 1.57 km W of Cobb, CaliforniaMon, May 20, 10:10 AM PDT · 15106 days ago · 4 km deep · 2 km away
39. 1.66 km W of Cobb, CaliforniaMon, May 20, 11:08 AM PDT · 15106 days ago · 2 km deep · 2 km away
40. 1.72 km NW of Healdsburg, CaliforniaMon, May 20, 12:02 PM PDT · 15106 days ago · 7 km deep · 21 km away
41. 3.28 km SSW of Colusa, CaliforniaMon, May 20, 6:21 PM PDT · 15106 days ago · 20 km deep · 76 km away
42. 2.710 km WSW of Meridian, CaliforniaMon, May 20, 6:23 PM PDT · 15106 days ago · 8 km deep · 75 km away
43. 2.56 km SSW of Colusa, CaliforniaMon, May 20, 6:25 PM PDT · 15106 days ago · 12 km deep · 76 km away
44. 3.37 km SSW of Colusa, CaliforniaMon, May 20, 6:50 PM PDT · 15106 days ago · 21 km deep · 76 km away
45. 2.26 km S of Colusa, CaliforniaMon, May 20, 8:42 PM PDT · 15105 days ago · 13 km deep · 78 km away
46. 2.37 km WSW of Cobb, CaliforniaMon, May 20, 9:12 PM PDT · 15105 days ago · 4 km deep · 2 km away
47. 1.69 km NE of Hopland, CaliforniaMon, May 20, 10:47 PM PDT · 15105 days ago · 6 km deep · 34 km away
48. 2.0Northern CaliforniaMon, May 20, 11:12 PM PDT · 15105 days ago · 6 km deep · 81 km away
49. 2.46 km WSW of Meridian, CaliforniaTue, May 21, 2:23 AM PDT · 15105 days ago · 7 km deep · 78 km away
50. 3.09 km W of Meridian, CaliforniaTue, May 21, 3:34 AM PDT · 15105 days ago · 23 km deep · 76 km away
51. 2.210 km ESE of Williams, CaliforniaTue, May 21, 7:30 AM PDT · 15105 days ago · 14 km deep · 74 km away
52. 1.57 km E of Williams, CaliforniaTue, May 21, 7:57 AM PDT · 15105 days ago · 3 km deep · 75 km away
53. 1.84 km W of Cobb, CaliforniaTue, May 21, 10:33 AM PDT · 15105 days ago · 0 km deep · 3 km away
54. 1.95 km W of Cobb, CaliforniaTue, May 21, 10:35 AM PDT · 15105 days ago · 1 km deep · 3 km away
55. 2.37 km W of Cobb, CaliforniaTue, May 21, 10:48 PM PDT · 15104 days ago · 0 km deep · 3 km away
56. 1.99 km W of Cobb, CaliforniaTue, May 21, 10:48 PM PDT · 15104 days ago · 0 km deep · 5 km away
57. 1.67 km W of Cobb, CaliforniaThu, May 23, 1:22 AM PDT · 15103 days ago · 3 km deep · 3 km away
58. 3.07 km WSW of Cobb, CaliforniaThu, May 23, 4:45 AM PDT · 15103 days ago · 4 km deep · 1 km away
59. 2.06 km W of Cobb, CaliforniaFri, May 24, 2:07 AM PDT · 15102 days ago · 3 km deep · 2 km away
60. 2.16 km W of Cobb, CaliforniaFri, May 24, 2:33 AM PDT · 15102 days ago · 4 km deep · 2 km away

The first 60 of 188.

Before

1. 2.14 km WSW of Cobb, CaliforniaFri, May 10, 4:02 PM PDT · 15116 days ago · 1 km deep · 2 km away
2. 2.27 km W of Cobb, CaliforniaFri, May 10, 2:02 PM PDT · 15116 days ago · 2 km deep · 2 km away
3. 2.36 km W of Cobb, CaliforniaFri, May 10, 1:19 PM PDT · 15116 days ago · 2 km deep · 2 km away
4. 1.55 km SW of Cobb, CaliforniaFri, May 10, 5:02 AM PDT · 15116 days ago · 0 km deep · 3 km away
5. 1.57 km WSW of Cobb, CaliforniaThu, May 9, 10:55 PM PDT · 15116 days ago · 2 km deep · 1 km away
6. 1.69 km WSW of Cobb, CaliforniaThu, May 9, 10:29 AM PDT · 15117 days ago · 2 km deep · 3 km away
7. 1.56 km W of Cobb, CaliforniaWed, May 8, 8:19 PM PDT · 15117 days ago · 0 km deep · 3 km away
8. 2.36 km W of Cobb, CaliforniaWed, May 8, 8:14 PM PDT · 15117 days ago · 0 km deep · 3 km away
9. 1.86 km W of Cobb, CaliforniaWed, May 8, 8:09 PM PDT · 15117 days ago · 0 km deep · 3 km away
10. 1.68 km W of Cobb, CaliforniaTue, May 7, 9:24 PM PDT · 15118 days ago · 1 km deep · 3 km away
11. 1.88 km W of Cobb, CaliforniaTue, May 7, 9:18 PM PDT · 15118 days ago · 1 km deep · 3 km away
12. 1.54 km S of Cobb, CaliforniaMon, May 6, 7:24 AM PDT · 15120 days ago · 2 km deep · 7 km away
13. 1.6Northern CaliforniaMon, May 6, 6:08 AM PDT · 15120 days ago · 3 km deep · 2 km away
14. 1.67 km W of Cobb, CaliforniaSun, May 5, 11:56 PM PDT · 15120 days ago · 3 km deep · 2 km away
15. 1.610 km NW of Cobb, CaliforniaSun, May 5, 8:31 AM PDT · 15121 days ago · 2 km deep · 9 km away
16. 1.712 km WNW of Cobb, CaliforniaSat, May 4, 9:22 AM PDT · 15122 days ago · 1 km deep · 8 km away
17. 2.15 km SSW of Cobb, CaliforniaSat, May 4, 8:18 AM PDT · 15122 days ago · 1 km deep · 4 km away
18. 1.86 km W of Cobb, CaliforniaFri, May 3, 11:06 PM PDT · 15122 days ago · -1 km deep · 3 km away
19. 1.85 km W of Angwin, CaliforniaFri, May 3, 3:50 PM PDT · 15123 days ago · 8 km deep · 35 km away
20. 2.321 km WSW of Williams, CaliforniaWed, May 1, 8:03 AM PDT · 15125 days ago · 0 km deep · 48 km away

From the USGS Earthquake Hazards Program and its partner networks, event nc47649. Read Mon, Sep 28, 2026, 1:40 PM UTC.