M1.6 earthquake 8 km WSW of Cobb, California

Magnitude

1.6 (md), micro

Local time

Sun, Apr 21, 1985, 8:07 AM PST

UTC

1985-04-21 16:07:36 UTC

Depth

3.2 km (2.0 mi), shallow

Epicenter

38.800° N, 122.813° 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

±0.08

Depth from

From location

Station coverage gap

63°

Stations used

20

• Cobb, CaliforniaPopulation 1,778. Forecast8 kmWSW
• Healdsburg, CaliforniaPopulation 11,742. Forecast22 kmNNE
• Santa Rosa, CaliforniaPopulation 178,127. Forecast41 kmNNW
• Los Angeles, CaliforniaPopulation 3,820,914. Forecast667 kmNW

After

1. 1.88 km W of Cobb, CaliforniaTue, May 7, 9:18 PM PDT · 15112 days ago · 1 km deep · 2 km away
2. 1.68 km W of Cobb, CaliforniaTue, May 7, 9:24 PM PDT · 15112 days ago · 1 km deep · 2 km away
3. 1.86 km W of Cobb, CaliforniaWed, May 8, 8:09 PM PDT · 15112 days ago · 0 km deep · 3 km away
4. 2.36 km W of Cobb, CaliforniaWed, May 8, 8:14 PM PDT · 15112 days ago · 0 km deep · 3 km away
5. 1.56 km W of Cobb, CaliforniaWed, May 8, 8:19 PM PDT · 15112 days ago · 0 km deep · 3 km away
6. 1.69 km WSW of Cobb, CaliforniaThu, May 9, 10:29 AM PDT · 15111 days ago · 2 km deep · 1 km away
7. 1.57 km WSW of Cobb, CaliforniaThu, May 9, 10:55 PM PDT · 15110 days ago · 2 km deep · 1 km away
8. 1.55 km SW of Cobb, CaliforniaFri, May 10, 5:02 AM PDT · 15110 days ago · 0 km deep · 4 km away
9. 2.36 km W of Cobb, CaliforniaFri, May 10, 1:19 PM PDT · 15110 days ago · 2 km deep · 2 km away
10. 2.27 km W of Cobb, CaliforniaFri, May 10, 2:02 PM PDT · 15110 days ago · 2 km deep · 1 km away
11. 2.14 km WSW of Cobb, CaliforniaFri, May 10, 4:02 PM PDT · 15110 days ago · 1 km deep · 4 km away
12. 2.86 km WSW of Cobb, CaliforniaSat, May 11, 7:28 AM PDT · 15109 days ago · 0 km deep · 2 km away
13. 2.27 km WSW of Cobb, CaliforniaSat, May 11, 8:22 AM PDT · 15109 days ago · 1 km deep · 1 km away
14. 2.16 km W of Cobb, CaliforniaSat, May 11, 11:51 AM PDT · 15109 days ago · 3 km deep · 3 km away
15. 1.86 km W of Cobb, CaliforniaSun, May 12, 2:38 PM PDT · 15108 days ago · 3 km deep · 3 km away
16. 1.97 km W of Cobb, CaliforniaMon, May 13, 2:08 AM PDT · 15107 days ago · 1 km deep · 3 km away
17. 2.15 km ENE of Calpella, CaliforniaMon, May 13, 6:39 AM PDT · 15107 days ago · 6 km deep · 57 km away
18. 2.13 km SW of Cobb, CaliforniaMon, May 13, 4:59 PM PDT · 15107 days ago · 1 km deep · 6 km away
19. 1.619 km E of Potter Valley, CaliforniaMon, May 13, 7:10 PM PDT · 15107 days ago · 5 km deep · 62 km away
20. 2.17 km WSW of Cobb, CaliforniaMon, May 13, 8:30 PM PDT · 15107 days ago · 1 km deep · 1 km away
21. 1.94 km ENE of Calpella, CaliforniaMon, May 13, 9:22 PM PDT · 15106 days ago · 0 km deep · 58 km away
22. 2.67 km W of Cobb, CaliforniaTue, May 14, 5:07 AM PDT · 15106 days ago · 3 km deep · 2 km away
23. 1.68 km WSW of Cobb, CaliforniaTue, May 14, 9:04 AM PDT · 15106 days ago · 3 km deep · 0 km away
24. 1.617 km NE of Upper Lake, CaliforniaTue, May 14, 6:37 PM PDT · 15106 days ago · 4 km deep · 54 km away
25. 1.67 km W of Cobb, CaliforniaTue, May 14, 6:55 PM PDT · 15106 days ago · 0 km deep · 3 km away
26. 1.95 km SW of Cobb, CaliforniaTue, May 14, 11:54 PM PDT · 15105 days ago · 1 km deep · 5 km away
27. 2.07 km WSW of Cobb, CaliforniaWed, May 15, 5:04 AM PDT · 15105 days ago · 2 km deep · 1 km away
28. 1.56 km NW of Cobb, CaliforniaWed, May 15, 11:41 AM PDT · 15105 days ago · 1 km deep · 8 km away
29. 2.46 km W of Cobb, CaliforniaWed, May 15, 1:58 PM PDT · 15105 days ago · 3 km deep · 3 km away
30. 1.76 km W of Cobb, CaliforniaWed, May 15, 1:59 PM PDT · 15105 days ago · 3 km deep · 3 km away
31. 1.59 km W of Cobb, CaliforniaWed, May 15, 11:39 PM PDT · 15104 days ago · 1 km deep · 3 km away
32. 2.48 km WSW of Cobb, CaliforniaThu, May 16, 7:52 AM PDT · 15104 days ago · 3 km deep · 1 km away
33. 1.87 km WSW of Cobb, CaliforniaThu, May 16, 8:33 AM PDT · 15104 days ago · 3 km deep · 1 km away
34. 2.37 km WSW of Cobb, CaliforniaThu, May 16, 1:57 PM PDT · 15104 days ago · 4 km deep · 1 km away
35. 1.820 km ENE of Clearlake, CaliforniaThu, May 16, 8:29 PM PDT · 15104 days ago · 6 km deep · 44 km away
36. 1.67 km WSW of Cobb, CaliforniaThu, May 16, 10:28 PM PDT · 15103 days ago · 1 km deep · 1 km away
37. 2.14 km ENE of Hopland, CaliforniaFri, May 17, 12:57 AM PDT · 15103 days ago · 3 km deep · 30 km away
38. 2.08 km WSW of Cobb, CaliforniaFri, May 17, 1:25 AM PDT · 15103 days ago · 3 km deep · 1 km away
39. 1.612 km WSW of Williams, CAFri, May 17, 6:49 PM PDT · 15103 days ago · 7 km deep · 58 km away
40. 1.710 km WSW of Cobb, CaliforniaSat, May 18, 7:09 AM PDT · 15102 days ago · 1 km deep · 2 km away
41. 2.88 km WSW of Meridian, CaliforniaSat, May 18, 12:33 PM PDT · 15102 days ago · 0 km deep · 78 km away
42. 1.71 km ESE of Angwin, CaliforniaSat, May 18, 10:48 PM PDT · 15101 days ago · 8 km deep · 42 km away
43. 2.35 km W of Cobb, CaliforniaSun, May 19, 1:09 PM PDT · 15101 days ago · 0 km deep · 3 km away
44. 1.95 km W of Cobb, CaliforniaSun, May 19, 2:46 PM PDT · 15101 days ago · 0 km deep · 4 km away
45. 1.95 km W of Cobb, CaliforniaSun, May 19, 2:46 PM PDT · 15101 days ago · 0 km deep · 4 km away
46. 2.35 km W of Meridian, CaliforniaMon, May 20, 1:11 AM PDT · 15100 days ago · 9 km deep · 82 km away
47. 2.66 km SSW of Colusa, CaliforniaMon, May 20, 2:25 AM PDT · 15100 days ago · 21 km deep · 78 km away
48. 1.52 km N of Healdsburg, CaliforniaMon, May 20, 8:41 AM PDT · 15100 days ago · 4 km deep · 20 km away
49. 1.84 km SW of Albion, CaliforniaMon, May 20, 8:50 AM PDT · 15100 days ago · 1 km deep · 97 km away
50. 1.57 km W of Cobb, CaliforniaMon, May 20, 10:10 AM PDT · 15100 days ago · 4 km deep · 2 km away
51. 1.66 km W of Cobb, CaliforniaMon, May 20, 11:08 AM PDT · 15100 days ago · 2 km deep · 2 km away
52. 1.72 km NW of Healdsburg, CaliforniaMon, May 20, 12:02 PM PDT · 15100 days ago · 7 km deep · 20 km away
53. 3.28 km SSW of Colusa, CaliforniaMon, May 20, 6:21 PM PDT · 15100 days ago · 20 km deep · 78 km away
54. 2.710 km WSW of Meridian, CaliforniaMon, May 20, 6:23 PM PDT · 15100 days ago · 8 km deep · 76 km away
55. 2.56 km SSW of Colusa, CaliforniaMon, May 20, 6:25 PM PDT · 15100 days ago · 12 km deep · 78 km away
56. 3.37 km SSW of Colusa, CaliforniaMon, May 20, 6:50 PM PDT · 15100 days ago · 21 km deep · 78 km away
57. 2.26 km S of Colusa, CaliforniaMon, May 20, 8:42 PM PDT · 15100 days ago · 13 km deep · 80 km away
58. 2.37 km WSW of Cobb, CaliforniaMon, May 20, 9:12 PM PDT · 15099 days ago · 4 km deep · 1 km away
59. 1.69 km NE of Hopland, CaliforniaMon, May 20, 10:47 PM PDT · 15099 days ago · 6 km deep · 33 km away
60. 2.0Northern CaliforniaMon, May 20, 11:12 PM PDT · 15099 days ago · 6 km deep · 83 km away

The first 60 of 186.

From the USGS Earthquake Hazards Program and its partner networks, event nc46502. Read Tue, Sep 22, 2026, 3:14 PM UTC.