M1.9 earthquake 10 km WSW of Arbuckle, California

Magnitude

1.9 (md), micro

Local time

Sun, Oct 27, 1985, 8:39 PM PST

UTC

1985-10-28 04:39:36 UTC

Depth

13.3 km (8.3 mi), shallow

Epicenter

38.969° N, 122.168° W

Region

California

Tsunami flag

No

Status

Reviewed by a seismologist

Location uncertainty

About 0.9 km horizontally, 0.4 km in depth

Magnitude uncertainty

±0.10

Depth from

From location

Station coverage gap

135°

Stations used

4

• Arbuckle, CaliforniaPopulation 3,028. Forecast11 kmWSW
• Clearlake, CaliforniaPopulation 15,182. Forecast40 kmE
• Sacramento, CaliforniaPopulation 524,943. Forecast73 kmNW
• Los Angeles, CaliforniaPopulation 3,820,914. Forecast649 kmNNW

After

1. 1.89 km E of Hopland, CaliforniaWed, Nov 13, 6:41 AM PST · 14923 days ago · 2 km deep · 73 km away
2. 2.15 km SW of Cobb, CaliforniaWed, Nov 13, 6:56 PM PST · 14923 days ago · 1 km deep · 55 km away
3. 1.66 km W of Cobb, CaliforniaWed, Nov 13, 9:09 PM PST · 14923 days ago · 2 km deep · 57 km away
4. 1.914 km E of Angwin, CaliforniaWed, Nov 13, 9:32 PM PST · 14923 days ago · 1 km deep · 43 km away
5. 2.17 km W of Cobb, CaliforniaThu, Nov 14, 7:44 AM PST · 14922 days ago · 1 km deep · 58 km away
6. 1.97 km W of Cobb, CaliforniaThu, Nov 14, 7:44 AM PST · 14922 days ago · 1 km deep · 58 km away
7. 1.76 km WSW of Calistoga, CaliforniaThu, Nov 14, 3:12 PM PST · 14922 days ago · 1 km deep · 62 km away
8. 3.08 km WSW of Paradise, CaliforniaFri, Nov 15, 3:11 AM PST · 14922 days ago · 28 km deep · 93 km away
9. 1.614 km ESE of Hidden Valley Lake, CaliforniaSat, Nov 16, 8:03 AM PST · 14920 days ago · -1 km deep · 33 km away
10. 2.77 km ENE of Nord, CaliforniaSat, Nov 16, 10:24 AM PST · 14920 days ago · 14 km deep · 96 km away
11. 1.66 km W of Cobb, CaliforniaSat, Nov 16, 8:30 PM PST · 14920 days ago · 2 km deep · 57 km away
12. 1.98 km W of Cobb, CaliforniaSun, Nov 17, 4:30 AM PST · 14920 days ago · 1 km deep · 59 km away
13. 1.84 km W of Cobb, CaliforniaSun, Nov 17, 7:27 AM PST · 14919 days ago · 0 km deep · 55 km away
14. 2.68 km W of Cobb, CaliforniaSun, Nov 17, 10:43 AM PST · 14919 days ago · 1 km deep · 59 km away
15. 1.98 km W of Lodoga, CaliforniaSun, Nov 17, 6:48 PM PST · 14919 days ago · 4 km deep · 51 km away
16. 1.51 km E of Knights Landing, CaliforniaMon, Nov 18, 8:15 AM PST · 14918 days ago · 1 km deep · 44 km away
17. 1.55 km SW of Cobb, CaliforniaMon, Nov 18, 11:42 AM PST · 14918 days ago · 0 km deep · 56 km away
18. 2.36 km W of Cobb, CaliforniaTue, Nov 19, 5:41 AM PST · 14917 days ago · 3 km deep · 57 km away
19. 1.5Northern CaliforniaTue, Nov 19, 6:48 AM PST · 14917 days ago · 1 km deep · 57 km away
20. 1.76 km W of Cobb, CaliforniaTue, Nov 19, 7:03 AM PST · 14917 days ago · 3 km deep · 57 km away
21. 1.79 km WSW of Cobb, CaliforniaWed, Nov 20, 5:14 AM PST · 14917 days ago · 2 km deep · 60 km away
22. 2.36 km ENE of Nord, CaliforniaWed, Nov 20, 10:01 AM PST · 14916 days ago · 18 km deep · 95 km away
23. 1.65 km WSW of Cobb, CaliforniaWed, Nov 20, 6:43 PM PST · 14916 days ago · 2 km deep · 56 km away
24. 1.85 km WSW of Cobb, CaliforniaWed, Nov 20, 6:43 PM PST · 14916 days ago · 1 km deep · 56 km away
25. 1.86 km W of Cobb, CaliforniaWed, Nov 20, 9:58 PM PST · 14916 days ago · 1 km deep · 57 km away
26. 2.13 km ESE of Cloverdale, CaliforniaWed, Nov 20, 11:42 PM PST · 14916 days ago · 2 km deep · 74 km away
27. 2.212 km E of Geyserville, CaliforniaFri, Nov 22, 1:10 AM PST · 14915 days ago · 3 km deep · 60 km away
28. 2.29 km WSW of Cobb, CaliforniaFri, Nov 22, 7:08 AM PST · 14914 days ago · 1 km deep · 60 km away
29. 1.57 km WSW of Cobb, CaliforniaFri, Nov 22, 2:45 PM PST · 14914 days ago · 2 km deep · 58 km away
30. 1.77 km WSW of Cobb, CaliforniaFri, Nov 22, 8:26 PM PST · 14914 days ago · 1 km deep · 58 km away
31. 1.65 km SW of Cobb, CaliforniaFri, Nov 22, 8:45 PM PST · 14914 days ago · 0 km deep · 56 km away
32. 2.55 km SW of Cobb, CaliforniaFri, Nov 22, 8:47 PM PST · 14914 days ago · 0 km deep · 56 km away
33. 2.27 km W of Cobb, CaliforniaFri, Nov 22, 9:41 PM PST · 14914 days ago · 0 km deep · 58 km away
34. 2.05 km SW of Cobb, CaliforniaSat, Nov 23, 9:28 AM PST · 14913 days ago · 4 km deep · 56 km away
35. 1.78 km WSW of Cobb, CaliforniaSat, Nov 23, 10:36 AM PST · 14913 days ago · 3 km deep · 59 km away
36. 2.15 km WSW of Cobb, CaliforniaSun, Nov 24, 1:20 PM PST · 14912 days ago · 1 km deep · 56 km away
37. 1.87 km W of Cobb, CaliforniaSun, Nov 24, 9:13 PM PST · 14912 days ago · 1 km deep · 58 km away
38. 2.026 km NE of Potter Valley, CaliforniaSun, Nov 24, 10:08 PM PST · 14912 days ago · 7 km deep · 83 km away
39. 1.98 km W of Cobb, CaliforniaMon, Nov 25, 6:26 PM PST · 14911 days ago · 0 km deep · 59 km away
40. 1.75 km W of Cobb, CaliforniaTue, Nov 26, 12:24 PM PST · 14910 days ago · 1 km deep · 56 km away
41. 1.96 km E of Calpella, CaliforniaTue, Nov 26, 2:53 PM PST · 14910 days ago · 3 km deep · 88 km away
42. 2.03 km ESE of Clear Lake Riviera, CaliforniaTue, Nov 26, 8:43 PM PST · 14910 days ago · 4 km deep · 45 km away
43. 1.67 km WSW of Cobb, CaliforniaTue, Nov 26, 9:23 PM PST · 14910 days ago · 0 km deep · 58 km away
44. 1.57 km WSW of Cobb, CaliforniaTue, Nov 26, 9:23 PM PST · 14910 days ago · -1 km deep · 58 km away
45. 2.07 km WSW of Cobb, CaliforniaTue, Nov 26, 9:27 PM PST · 14910 days ago · 0 km deep · 58 km away
46. 1.96 km W of Cobb, CaliforniaTue, Nov 26, 10:19 PM PST · 14910 days ago · 3 km deep · 57 km away
47. 2.68 km WSW of Cobb, CaliforniaWed, Nov 27, 3:46 AM PST · 14910 days ago · 1 km deep · 59 km away
48. 1.612 km NE of Clearlake, CaliforniaWed, Nov 27, 4:37 AM PST · 14910 days ago · 6 km deep · 30 km away
49. 1.55 km W of Cobb, CaliforniaWed, Nov 27, 8:18 AM PST · 14909 days ago · 0 km deep · 56 km away
50. 1.87 km WSW of Cobb, CaliforniaWed, Nov 27, 5:36 PM PST · 14909 days ago · 0 km deep · 58 km away
51. 1.64 km SW of Cobb, CaliforniaThu, Nov 28, 1:33 AM PST · 14909 days ago · 1 km deep · 55 km away
52. 1.97 km W of Cobb, CaliforniaThu, Nov 28, 4:31 AM PST · 14909 days ago · 0 km deep · 57 km away
53. 2.11 km WSW of Roseland, CaliforniaThu, Nov 28, 7:54 AM PST · 14908 days ago · 6 km deep · 79 km away
54. 1.77 km W of Cobb, CaliforniaThu, Nov 28, 10:45 AM PST · 14908 days ago · 4 km deep · 58 km away
55. 2.111 km SSE of Elmira, CaliforniaThu, Nov 28, 5:32 PM PST · 14908 days ago · 13 km deep · 84 km away
56. 1.99 km WSW of Cobb, CaliforniaThu, Nov 28, 10:20 PM PST · 14908 days ago · 2 km deep · 60 km away
57. 2.321 km ENE of Clearlake, CaliforniaFri, Nov 29, 12:48 AM PST · 14908 days ago · 6 km deep · 22 km away
58. 1.58 km W of Cobb, CaliforniaFri, Nov 29, 3:14 AM PST · 14908 days ago · 1 km deep · 59 km away
59. 1.65 km WSW of Cobb, CaliforniaFri, Nov 29, 5:48 AM PST · 14907 days ago · 0 km deep · 56 km away
60. 1.65 km WSW of Cobb, CaliforniaFri, Nov 29, 7:22 AM PST · 14907 days ago · 1 km deep · 56 km away

The first 60 of 173.

From the USGS Earthquake Hazards Program and its partner networks, event nc57772. Read Wed, Sep 23, 2026, 1:01 AM UTC.