M3.3 earthquake 29 km SE of Ruth, California

Magnitude

3.3 (md), minor

Local time

Tue, Oct 1, 1985, 4:59 AM PDT

UTC

1985-10-01 11:59:54 UTC

Depth

42.5 km (26.4 mi), shallow

Epicenter

40.110° N, 123.052° W

Region

California

Tsunami flag

No

Status

Reviewed by a seismologist

Location uncertainty

About 0.2 km horizontally, 0.7 km in depth

Magnitude uncertainty

±0.15

Depth from

From location

Station coverage gap

47°

Stations used

51

• Covelo, CaliforniaPopulation 1,255. Forecast39 kmNNE
• Red Bluff, CaliforniaPopulation 14,131. Forecast70 kmW
• Chico, CaliforniaPopulation 121,345. Forecast112 kmWNW
• Los Angeles, CaliforniaPopulation 3,820,914. Forecast797 kmNNW

After

1. 1.715 km WSW of Laytonville, CaliforniaTue, Oct 1, 11:25 AM PDT · 14966 days ago · 3 km deep · 73 km away
2. 2.19 km NE of Vina, CaliforniaTue, Oct 1, 4:42 PM PDT · 14966 days ago · 0 km deep · 92 km away
3. 2.411 km SSE of Laytonville, CaliforniaWed, Oct 2, 3:08 AM PDT · 14966 days ago · 2 km deep · 66 km away
4. 2.27 km NE of Redding, CaliforniaFri, Oct 4, 7:49 AM PDT · 14963 days ago · 29 km deep · 84 km away
5. 1.64 km NW of Redwood Valley, CaliforniaFri, Oct 4, 10:40 AM PDT · 14963 days ago · 7 km deep · 93 km away
6. 1.722 km WSW of Weott, CaliforniaFri, Oct 4, 3:30 PM PDT · 14963 days ago · 9 km deep · 97 km away
7. 2.422 km NW of Mad River, CaliforniaSat, Oct 5, 4:49 AM PDT · 14963 days ago · 23 km deep · 76 km away
8. 2.78 km NW of Redwood Valley, CaliforniaMon, Oct 7, 8:39 AM PDT · 14960 days ago · -1 km deep · 89 km away
9. 1.714 km W of Ruth, CaliforniaWed, Oct 9, 3:47 AM PDT · 14959 days ago · -1 km deep · 41 km away
10. 2.112 km NNW of Potter Valley, CaliforniaThu, Oct 10, 5:02 PM PDT · 14957 days ago · 5 km deep · 77 km away
11. 2.720 km SW of Weott, CaliforniaFri, Oct 11, 2:11 AM PDT · 14957 days ago · 4 km deep · 91 km away
12. 1.97 km NNE of Upper Lake, CaliforniaFri, Oct 11, 7:57 AM PDT · 14956 days ago · 7 km deep · 99 km away
13. 2.610 km ENE of Artois, CaliforniaSat, Oct 12, 11:06 PM PDT · 14955 days ago · 22 km deep · 98 km away
14. 1.631 km WNW of Paskenta, CaliforniaMon, Oct 14, 1:51 AM PDT · 14954 days ago · 10 km deep · 19 km away
15. 2.310 km SSE of Laytonville, CaliforniaMon, Oct 14, 9:39 AM PDT · 14953 days ago · 8 km deep · 64 km away
16. 1.818 km E of Potter Valley, CaliforniaMon, Oct 14, 1:57 PM PDT · 14953 days ago · 6 km deep · 85 km away
17. 1.76 km ENE of Willits, CaliforniaTue, Oct 15, 8:25 PM PDT · 14952 days ago · 4 km deep · 78 km away
18. 1.611 km SSE of Laytonville, CaliforniaThu, Oct 17, 9:32 AM PDT · 14950 days ago · 3 km deep · 66 km away
19. 2.625 km SE of Blue Lake, CaliforniaSat, Oct 19, 4:11 PM PDT · 14948 days ago · 53 km deep · 91 km away
20. 1.527 km NNE of Potter Valley, CaliforniaFri, Oct 25, 6:59 PM PDT · 14942 days ago · 9 km deep · 63 km away
21. 3.122 km WSW of Weott, CaliforniaSat, Oct 26, 4:41 PM PDT · 14941 days ago · 13 km deep · 94 km away
22. 1.718 km NNE of Nice, CaliforniaSun, Oct 27, 12:14 PM PST · 14940 days ago · 10 km deep · 98 km away
23. 1.610 km SSE of Laytonville, CaliforniaMon, Oct 28, 4:37 PM PST · 14939 days ago · 7 km deep · 64 km away
24. 2.127 km E of Ruth, CaliforniaTue, Oct 29, 5:57 AM PST · 14938 days ago · 25 km deep · 17 km away
25. 2.418 km E of Potter Valley, CaliforniaFri, Nov 1, 1:43 AM PST · 14936 days ago · 6 km deep · 85 km away
26. 2.05 km SSE of Red Bluff, CaliforniaFri, Nov 1, 6:10 AM PST · 14935 days ago · 6 km deep · 72 km away
27. 1.79 km NNE of Brooktrails, CaliforniaSat, Nov 2, 7:29 AM PST · 14934 days ago · 8 km deep · 70 km away
28. 3.30 km WSW of Tehama, CaliforniaSun, Nov 3, 5:02 AM PST · 14933 days ago · 71 km deep · 79 km away
29. 1.521 km W of Trinity Center, CaliforniaSun, Nov 3, 8:07 PM PST · 14933 days ago · 20 km deep · 95 km away
30. 1.81 km N of Calpella, CaliforniaMon, Nov 4, 12:04 AM PST · 14933 days ago · 7 km deep · 97 km away
31. 1.714 km NE of Potter Valley, CaliforniaMon, Nov 4, 9:03 AM PST · 14932 days ago · 6 km deep · 79 km away
32. 2.025 km W of Paskenta, CaliforniaThu, Nov 7, 5:00 AM PST · 14929 days ago · -1 km deep · 29 km away
33. 1.823 km SE of Covelo, CaliforniaSat, Nov 9, 7:34 AM PST · 14927 days ago · 5 km deep · 54 km away
34. 1.828 km W of Paskenta, CaliforniaMon, Nov 11, 5:25 AM PST · 14925 days ago · 15 km deep · 25 km away
35. 1.77 km NE of Phillipsville, CaliforniaMon, Nov 11, 4:24 PM PST · 14925 days ago · 8 km deep · 60 km away
36. 2.88 km E of Leggett, CaliforniaMon, Nov 11, 8:15 PM PST · 14925 days ago · 0 km deep · 56 km away
37. 2.613 km N of Brooktrails, CaliforniaMon, Nov 11, 8:57 PM PST · 14925 days ago · 9 km deep · 67 km away
38. 1.630 km ENE of Covelo, CaliforniaWed, Nov 13, 3:41 AM PST · 14924 days ago · 16 km deep · 22 km away
39. 1.513 km N of Brooktrails, CaliforniaWed, Nov 13, 4:27 AM PST · 14923 days ago · 9 km deep · 67 km away
40. 1.78 km N of Laytonville, CaliforniaWed, Nov 13, 6:29 AM PST · 14923 days ago · 3 km deep · 53 km away
41. 1.66 km ENE of Brooktrails, CaliforniaFri, Nov 15, 5:43 AM PST · 14921 days ago · 7 km deep · 74 km away
42. 1.514 km SSE of Laytonville, CaliforniaSun, Nov 17, 4:03 AM PST · 14919 days ago · 10 km deep · 66 km away
43. 1.98 km W of Lodoga, CaliforniaSun, Nov 17, 6:48 PM PST · 14919 days ago · 4 km deep · 99 km away
44. 1.726 km WNW of Paskenta, CaliforniaTue, Nov 19, 11:46 AM PST · 14917 days ago · -1 km deep · 24 km away
45. 1.59 km SSE of Willits, CaliforniaFri, Nov 22, 3:21 PM PST · 14914 days ago · 7 km deep · 89 km away
46. 3.78 km NNW of Alderpoint, CaliforniaFri, Nov 22, 11:27 PM PST · 14914 days ago · 28 km deep · 54 km away
47. 1.613 km SW of Mad River, CaliforniaFri, Nov 22, 11:44 PM PST · 14914 days ago · 4 km deep · 58 km away
48. 1.710 km NE of Phillipsville, CaliforniaFri, Nov 22, 11:47 PM PST · 14914 days ago · 24 km deep · 57 km away
49. 2.210 km NE of Phillipsville, CaliforniaSat, Nov 23, 12:47 AM PST · 14914 days ago · 29 km deep · 57 km away
50. 1.915 km W of Manton, CaliforniaSat, Nov 23, 8:49 PM PST · 14913 days ago · 28 km deep · 92 km away
51. 2.49 km NNW of Alderpoint, CaliforniaSat, Nov 23, 9:30 PM PST · 14913 days ago · 26 km deep · 55 km away
52. 1.810 km NE of Phillipsville, CaliforniaSat, Nov 23, 11:17 PM PST · 14913 days ago · 26 km deep · 58 km away
53. 1.817 km NE of Myers Flat, CaliforniaSun, Nov 24, 6:25 PM PST · 14912 days ago · 22 km deep · 65 km away
54. 2.118 km ENE of Weott, CaliforniaSun, Nov 24, 6:26 PM PST · 14912 days ago · 19 km deep · 66 km away
55. 2.026 km NE of Potter Valley, CaliforniaSun, Nov 24, 10:08 PM PST · 14912 days ago · 7 km deep · 72 km away
56. 1.712 km WSW of Willits, CaliforniaTue, Nov 26, 10:18 AM PST · 14910 days ago · 0 km deep · 92 km away
57. 1.96 km E of Calpella, CaliforniaTue, Nov 26, 2:53 PM PST · 14910 days ago · 3 km deep · 98 km away
58. 2.334 km NW of Paskenta, CaliforniaWed, Nov 27, 1:35 AM PST · 14910 days ago · 8 km deep · 17 km away
59. 1.930 km WNW of Paskenta, CaliforniaFri, Nov 29, 9:13 PM PST · 14907 days ago · 1 km deep · 20 km away

Before

1. 1.813 km N of French Gulch, CaliforniaMon, Sep 30, 7:19 PM PDT · 14967 days ago · 40 km deep · 87 km away
2. 2.019 km N of Upper Lake, CaliforniaSun, Sep 29, 3:36 PM PDT · 14968 days ago · 5 km deep · 87 km away
3. 1.74 km ESE of Cleone, CaliforniaWed, Sep 25, 6:30 PM PDT · 14972 days ago · 3 km deep · 92 km away
4. 2.312 km NE of Vina, CaliforniaWed, Sep 25, 4:02 PM PDT · 14972 days ago · 0 km deep · 95 km away
5. 1.71 km SW of Redway, CaliforniaFri, Sep 20, 2:50 PM PDT · 14977 days ago · 19 km deep · 67 km away
6. 2.127 km ESE of Covelo, CaliforniaFri, Sep 20, 5:57 AM PDT · 14977 days ago · 4 km deep · 47 km away
7. 2.37 km SSE of Trinity Center, CaliforniaThu, Sep 19, 11:53 AM PDT · 14978 days ago · 4 km deep · 96 km away
8. 1.612 km NE of Upper Lake, CaliforniaSat, Sep 14, 11:08 AM PDT · 14983 days ago · 4 km deep · 98 km away
9. 1.812 km NE of Upper Lake, CaliforniaFri, Sep 13, 7:29 PM PDT · 14984 days ago · 2 km deep · 100 km away
10. 2.512 km NE of Upper Lake, CaliforniaFri, Sep 13, 12:07 PM PDT · 14984 days ago · 3 km deep · 99 km away
11. 1.713 km SE of Millville, CaliforniaFri, Sep 13, 7:49 AM PDT · 14984 days ago · 4 km deep · 93 km away
12. 2.27 km SE of Millville, CaliforniaThu, Sep 12, 9:15 PM PDT · 14985 days ago · 19 km deep · 91 km away
13. 2.2Northern CaliforniaThu, Sep 12, 7:01 PM PDT · 14985 days ago · 2 km deep · 100 km away
14. 1.812 km NE of Upper Lake, CaliforniaThu, Sep 12, 8:59 AM PDT · 14985 days ago · 2 km deep · 99 km away
15. 2.214 km SW of Trinity Center, CaliforniaWed, Sep 11, 4:52 AM PDT · 14987 days ago · 8 km deep · 90 km away
16. 1.920 km NE of Upper Lake, CaliforniaTue, Sep 10, 3:44 PM PDT · 14987 days ago · -1 km deep · 92 km away
17. 2.32 km NE of Anderson, CaliforniaTue, Sep 10, 12:30 PM PDT · 14987 days ago · 61 km deep · 77 km away
18. 1.620 km W of Hyampom, CaliforniaFri, Sep 6, 12:57 AM PDT · 14992 days ago · 18 km deep · 79 km away
19. 1.622 km W of Hyampom, CaliforniaThu, Sep 5, 8:00 PM PDT · 14992 days ago · 4 km deep · 78 km away
20. 2.121 km W of Hyampom, CaliforniaThu, Sep 5, 7:36 PM PDT · 14992 days ago · 22 km deep · 81 km away

From the USGS Earthquake Hazards Program and its partner networks, event nc56053 (also filed as usp0002kbt). Read Tue, Sep 22, 2026, 11:31 PM UTC.