M1.8 earthquake 6 km W of Cobb, California

Magnitude

1.8 (md), micro

Local time

Fri, May 3, 1985, 11:06 PM PDT

UTC

1985-05-04 06:06:12 UTC

Depth

-0.8 km (-0.5 mi), shallow

Epicenter

38.825° N, 122.796° W

Region

California

Tsunami flag

No

Status

Reviewed by a seismologist

Location uncertainty

About 0.9 km horizontally, 3.5 km in depth

Magnitude uncertainty

±0.09

Depth from

From location

Station coverage gap

113°

Stations used

7

• Cobb, CaliforniaPopulation 1,778. Forecast6 kmW
• Clearlake, CaliforniaPopulation 15,182. Forecast21 kmSW
• Santa Rosa, CaliforniaPopulation 178,127. Forecast43 kmN
• Los Angeles, CaliforniaPopulation 3,820,914. Forecast669 kmNW

After

1. 1.612 km WSW of Williams, CAFri, May 17, 6:49 PM PDT · 15103 days ago · 7 km deep · 55 km away
2. 1.710 km WSW of Cobb, CaliforniaSat, May 18, 7:09 AM PDT · 15102 days ago · 1 km deep · 5 km away
3. 2.88 km WSW of Meridian, CaliforniaSat, May 18, 12:33 PM PDT · 15102 days ago · 0 km deep · 75 km away
4. 1.71 km ESE of Angwin, CaliforniaSat, May 18, 10:48 PM PDT · 15101 days ago · 8 km deep · 43 km away
5. 2.35 km W of Cobb, CaliforniaSun, May 19, 1:09 PM PDT · 15101 days ago · 0 km deep · 1 km away
6. 1.95 km W of Cobb, CaliforniaSun, May 19, 2:46 PM PDT · 15101 days ago · 0 km deep · 1 km away
7. 1.95 km W of Cobb, CaliforniaSun, May 19, 2:46 PM PDT · 15101 days ago · 0 km deep · 1 km away
8. 2.35 km W of Meridian, CaliforniaMon, May 20, 1:11 AM PDT · 15100 days ago · 9 km deep · 79 km away
9. 2.66 km SSW of Colusa, CaliforniaMon, May 20, 2:25 AM PDT · 15100 days ago · 21 km deep · 75 km away
10. 1.52 km N of Healdsburg, CaliforniaMon, May 20, 8:41 AM PDT · 15100 days ago · 4 km deep · 23 km away
11. 1.84 km SW of Albion, CaliforniaMon, May 20, 8:50 AM PDT · 15100 days ago · 1 km deep · 97 km away
12. 1.57 km W of Cobb, CaliforniaMon, May 20, 10:10 AM PDT · 15100 days ago · 4 km deep · 2 km away
13. 1.66 km W of Cobb, CaliforniaMon, May 20, 11:08 AM PDT · 15100 days ago · 2 km deep · 1 km away
14. 1.72 km NW of Healdsburg, CaliforniaMon, May 20, 12:02 PM PDT · 15100 days ago · 7 km deep · 24 km away
15. 3.28 km SSW of Colusa, CaliforniaMon, May 20, 6:21 PM PDT · 15100 days ago · 20 km deep · 75 km away
16. 2.710 km WSW of Meridian, CaliforniaMon, May 20, 6:23 PM PDT · 15100 days ago · 8 km deep · 74 km away
17. 2.56 km SSW of Colusa, CaliforniaMon, May 20, 6:25 PM PDT · 15100 days ago · 12 km deep · 75 km away
18. 3.37 km SSW of Colusa, CaliforniaMon, May 20, 6:50 PM PDT · 15100 days ago · 21 km deep · 75 km away
19. 2.26 km S of Colusa, CaliforniaMon, May 20, 8:42 PM PDT · 15100 days ago · 13 km deep · 77 km away
20. 2.37 km WSW of Cobb, CaliforniaMon, May 20, 9:12 PM PDT · 15100 days ago · 4 km deep · 2 km away
21. 1.69 km NE of Hopland, CaliforniaMon, May 20, 10:47 PM PDT · 15099 days ago · 6 km deep · 32 km away
22. 2.0Northern CaliforniaMon, May 20, 11:12 PM PDT · 15099 days ago · 6 km deep · 80 km away
23. 2.46 km WSW of Meridian, CaliforniaTue, May 21, 2:23 AM PDT · 15099 days ago · 7 km deep · 77 km away
24. 3.09 km W of Meridian, CaliforniaTue, May 21, 3:34 AM PDT · 15099 days ago · 23 km deep · 75 km away
25. 2.210 km ESE of Williams, CaliforniaTue, May 21, 7:30 AM PDT · 15099 days ago · 14 km deep · 72 km away
26. 1.57 km E of Williams, CaliforniaTue, May 21, 7:57 AM PDT · 15099 days ago · 3 km deep · 73 km away
27. 1.84 km W of Cobb, CaliforniaTue, May 21, 10:33 AM PDT · 15099 days ago · 0 km deep · 1 km away
28. 1.95 km W of Cobb, CaliforniaTue, May 21, 10:35 AM PDT · 15099 days ago · 1 km deep · 1 km away
29. 2.37 km W of Cobb, CaliforniaTue, May 21, 10:48 PM PDT · 15098 days ago · 0 km deep · 2 km away
30. 1.99 km W of Cobb, CaliforniaTue, May 21, 10:48 PM PDT · 15098 days ago · 0 km deep · 4 km away
31. 1.67 km W of Cobb, CaliforniaThu, May 23, 1:22 AM PDT · 15097 days ago · 3 km deep · 1 km away
32. 3.07 km WSW of Cobb, CaliforniaThu, May 23, 4:45 AM PDT · 15097 days ago · 4 km deep · 4 km away
33. 2.06 km W of Cobb, CaliforniaFri, May 24, 2:07 AM PDT · 15096 days ago · 3 km deep · 1 km away
34. 2.16 km W of Cobb, CaliforniaFri, May 24, 2:33 AM PDT · 15096 days ago · 4 km deep · 1 km away
35. 1.66 km W of Cobb, CaliforniaFri, May 24, 12:45 PM PDT · 15096 days ago · 3 km deep · 1 km away
36. 1.88 km WSW of Cobb, CaliforniaFri, May 24, 3:41 PM PDT · 15096 days ago · 1 km deep · 3 km away
37. 2.614 km N of Upper Lake, CaliforniaFri, May 24, 9:45 PM PDT · 15096 days ago · 9 km deep · 53 km away
38. 1.913 km N of Upper Lake, CaliforniaFri, May 24, 9:47 PM PDT · 15095 days ago · 8 km deep · 53 km away
39. 2.47 km SW of Colusa, CaliforniaFri, May 24, 11:59 PM PDT · 15095 days ago · 25 km deep · 74 km away
40. 2.38 km SSW of Colusa, CaliforniaSat, May 25, 1:54 AM PDT · 15095 days ago · 28 km deep · 74 km away
41. 2.316 km NNE of Angwin, CaliforniaSat, May 25, 10:56 AM PDT · 15095 days ago · -1 km deep · 36 km away
42. 2.26 km W of Cobb, CaliforniaSun, May 26, 3:25 AM PDT · 15094 days ago · 3 km deep · 0 km away
43. 2.16 km W of Cobb, CaliforniaSun, May 26, 3:36 AM PDT · 15094 days ago · 3 km deep · 1 km away
44. 3.012 km ESE of Hidden Valley Lake, CaliforniaSun, May 26, 4:57 AM PDT · 15094 days ago · 8 km deep · 33 km away
45. 2.55 km SW of Cobb, CaliforniaSun, May 26, 8:07 AM PDT · 15094 days ago · 2 km deep · 4 km away
46. 1.713 km SE of Hidden Valley Lake, CaliforniaSun, May 26, 8:12 AM PDT · 15094 days ago · 3 km deep · 33 km away
47. 1.65 km SW of Cobb, CaliforniaSun, May 26, 8:16 AM PDT · 15094 days ago · 1 km deep · 6 km away
48. 2.25 km SW of Cobb, CaliforniaSun, May 26, 8:17 AM PDT · 15094 days ago · 0 km deep · 6 km away
49. 1.85 km SW of Cobb, CaliforniaSun, May 26, 8:18 AM PDT · 15094 days ago · 0 km deep · 5 km away
50. 1.53 km NNE of Santa Rosa, CaliforniaSun, May 26, 9:08 AM PDT · 15094 days ago · 3 km deep · 41 km away
51. 2.46 km W of Cobb, CaliforniaSun, May 26, 10:21 AM PDT · 15094 days ago · 3 km deep · 1 km away
52. 1.57 km WSW of Cobb, CaliforniaSun, May 26, 8:13 PM PDT · 15094 days ago · 2 km deep · 2 km away
53. 1.57 km W of Cobb, CaliforniaSun, May 26, 9:16 PM PDT · 15094 days ago · 3 km deep · 1 km away
54. 2.64 km W of Meridian, CaliforniaMon, May 27, 1:30 PM PDT · 15093 days ago · 6 km deep · 80 km away
55. 2.08 km N of Cloverdale, CaliforniaTue, May 28, 7:17 AM PDT · 15092 days ago · 3 km deep · 20 km away
56. 2.23 km SW of Cobb, CaliforniaTue, May 28, 11:18 AM PDT · 15092 days ago · 2 km deep · 5 km away
57. 2.67 km WSW of Cobb, CaliforniaTue, May 28, 5:10 PM PDT · 15092 days ago · 0 km deep · 3 km away
58. 2.08 km WSW of Cobb, CaliforniaTue, May 28, 5:11 PM PDT · 15092 days ago · 0 km deep · 3 km away
59. 1.612 km ENE of Upper Lake, CaliforniaWed, May 29, 4:47 PM PDT · 15091 days ago · 9 km deep · 45 km away
60. 1.71 km NNE of Talmage, CaliforniaWed, May 29, 6:38 PM PDT · 15091 days ago · 4 km deep · 48 km away

The first 60 of 185.

From the USGS Earthquake Hazards Program and its partner networks, event nc1127785. Read Tue, Sep 22, 2026, 4:15 PM UTC.