M1.7 earthquake 1 km SW of Redway, California

Magnitude

1.7 (Md, duration), micro

Magnitude from

Northern California Seismic System

Local time

Fri, Sep 20, 1985, 2:50 PM PDT

UTC

1985-09-20 21:50:42 UTC

Depth

18.9 km (11.8 mi), shallow

Epicenter

40.109° N, 123.836° W

Region

California

Tsunami flag

No

Status

Reviewed by a seismologist

Location uncertainty

About 0.8 km horizontally, 0.4 km in depth

Magnitude uncertainty

±0.15

Depth from

From location

Station coverage gap

133°

Stations used

7

• Redway, CaliforniaPopulation 1,225. Forecast2 kmSW
• Fortuna, CaliforniaPopulation 12,000. Forecast61 kmSSE
• Chico, CaliforniaPopulation 121,345. Forecast176 kmWNW
• Los Angeles, CaliforniaPopulation 3,820,914. Forecast836 kmNW

After

1. 3.656 km WSW of Ferndale, CaliforniaSat, Sep 21, 4:58 AM PDT · 14986 days ago · 7 km deep · 93 km away
2. 2.210 km SW of Scotia, CaliforniaTue, Sep 24, 11:20 PM PDT · 14982 days ago · 12 km deep · 44 km away
3. 1.74 km ESE of Cleone, CaliforniaWed, Sep 25, 6:30 PM PDT · 14981 days ago · 3 km deep · 72 km away
4. 1.648 km SW of Ferndale, CaliforniaThu, Sep 26, 9:12 AM PDT · 14981 days ago · 3 km deep · 79 km away
5. 2.04 km NE of Hydesville, CaliforniaThu, Sep 26, 4:14 PM PDT · 14980 days ago · 25 km deep · 56 km away
6. 1.831 km SSW of Ferndale, CaliforniaSat, Sep 28, 12:32 PM PDT · 14979 days ago · 4 km deep · 56 km away
7. 2.541 km WSW of Ferndale, CaliforniaSun, Sep 29, 8:57 AM PDT · 14978 days ago · 16 km deep · 87 km away
8. 1.84 km N of Hydesville, CaliforniaSun, Sep 29, 6:12 PM PDT · 14977 days ago · 19 km deep · 57 km away
9. 1.619 km SSW of Ferndale, CaliforniaSun, Sep 29, 7:56 PM PDT · 14977 days ago · 26 km deep · 55 km away
10. 1.818 km SSW of Ferndale, CaliforniaSun, Sep 29, 8:14 PM PDT · 14977 days ago · 26 km deep · 56 km away
11. 1.835 km WSW of Ferndale, CaliforniaSun, Sep 29, 8:49 PM PDT · 14977 days ago · 25 km deep · 76 km away
12. 3.329 km SE of Ruth, CaliforniaTue, Oct 1, 4:59 AM PDT · 14976 days ago · 42 km deep · 67 km away
13. 1.715 km WSW of Laytonville, CaliforniaTue, Oct 1, 11:25 AM PDT · 14976 days ago · 3 km deep · 55 km away
14. 2.411 km SSE of Laytonville, CaliforniaWed, Oct 2, 3:08 AM PDT · 14975 days ago · 2 km deep · 67 km away
15. 2.14 km ESE of Fortuna, CaliforniaFri, Oct 4, 12:52 PM PDT · 14973 days ago · 22 km deep · 58 km away
16. 1.722 km WSW of Weott, CaliforniaFri, Oct 4, 3:30 PM PDT · 14973 days ago · 9 km deep · 33 km away
17. 2.221 km WSW of Ferndale, CaliforniaSat, Oct 5, 12:12 AM PDT · 14972 days ago · 22 km deep · 69 km away
18. 2.422 km NW of Mad River, CaliforniaSat, Oct 5, 4:49 AM PDT · 14972 days ago · 23 km deep · 53 km away
19. 1.925 km SW of Ferndale, CaliforniaSat, Oct 5, 8:51 PM PDT · 14971 days ago · 27 km deep · 64 km away
20. 3.528 km SW of Ferndale, CaliforniaSat, Oct 5, 9:34 PM PDT · 14971 days ago · 16 km deep · 61 km away
21. 2.78 km NW of Redwood Valley, CaliforniaMon, Oct 7, 8:39 AM PDT · 14970 days ago · -1 km deep · 99 km away
22. 3.066 km WSW of Ferndale, CaliforniaTue, Oct 8, 1:33 AM PDT · 14969 days ago · 3 km deep · 98 km away
23. 1.714 km W of Ruth, CaliforniaWed, Oct 9, 3:47 AM PDT · 14968 days ago · -1 km deep · 34 km away
24. 2.112 km NNW of Potter Valley, CaliforniaThu, Oct 10, 5:02 PM PDT · 14966 days ago · 5 km deep · 95 km away
25. 2.720 km SW of Weott, CaliforniaFri, Oct 11, 2:11 AM PDT · 14966 days ago · 4 km deep · 26 km away
26. 2.041 km SW of Ferndale, CaliforniaFri, Oct 11, 4:43 PM PDT · 14965 days ago · 23 km deep · 76 km away
27. 3.337 km SW of Ferndale, CaliforniaSun, Oct 13, 6:14 PM PDT · 14963 days ago · 25 km deep · 69 km away
28. 1.631 km WNW of Paskenta, CaliforniaMon, Oct 14, 1:51 AM PDT · 14963 days ago · 10 km deep · 84 km away
29. 2.310 km SSE of Laytonville, CaliforniaMon, Oct 14, 9:39 AM PDT · 14963 days ago · 8 km deep · 66 km away
30. 1.76 km ENE of Willits, CaliforniaTue, Oct 15, 8:25 PM PDT · 14961 days ago · 4 km deep · 89 km away
31. 1.611 km SSE of Laytonville, CaliforniaThu, Oct 17, 9:32 AM PDT · 14960 days ago · 3 km deep · 67 km away
32. 2.625 km SE of Blue Lake, CaliforniaSat, Oct 19, 4:11 PM PDT · 14957 days ago · 53 km deep · 68 km away
33. 2.312 km SW of Scotia, CaliforniaMon, Oct 21, 1:42 AM PDT · 14956 days ago · 6 km deep · 45 km away
34. 3.622 km WNW of Indianola, CaliforniaFri, Oct 25, 6:56 PM PDT · 14951 days ago · 21 km deep · 89 km away
35. 1.527 km NNE of Potter Valley, CaliforniaFri, Oct 25, 6:59 PM PDT · 14951 days ago · 9 km deep · 96 km away
36. 3.122 km WSW of Weott, CaliforniaSat, Oct 26, 4:41 PM PDT · 14950 days ago · 13 km deep · 30 km away
37. 1.610 km SSE of Laytonville, CaliforniaMon, Oct 28, 4:37 PM PST · 14948 days ago · 7 km deep · 66 km away
38. 2.127 km E of Ruth, CaliforniaTue, Oct 29, 5:57 AM PST · 14948 days ago · 25 km deep · 73 km away
39. 2.719 km WNW of Indianola, CaliforniaThu, Oct 31, 7:31 PM PST · 14945 days ago · 20 km deep · 89 km away
40. 1.79 km NNE of Brooktrails, CaliforniaSat, Nov 2, 7:29 AM PST · 14944 days ago · 8 km deep · 78 km away
41. 2.18 km NNE of Trinity Village, CaliforniaSat, Nov 2, 7:58 PM PST · 14943 days ago · 23 km deep · 98 km away
42. 2.235 km SSW of Ferndale, CaliforniaWed, Nov 6, 9:25 PM PST · 14939 days ago · 18 km deep · 56 km away
43. 1.734 km NW of Shelter Cove, CaliforniaWed, Nov 6, 9:36 PM PST · 14939 days ago · 4 km deep · 50 km away
44. 2.025 km W of Paskenta, CaliforniaThu, Nov 7, 5:00 AM PST · 14939 days ago · -1 km deep · 88 km away
45. 2.52 km NNE of Humboldt Hill, CaliforniaFri, Nov 8, 1:59 PM PST · 14938 days ago · 19 km deep · 77 km away
46. 1.823 km SE of Covelo, CaliforniaSat, Nov 9, 7:34 AM PST · 14937 days ago · 5 km deep · 84 km away
47. 2.29 km WNW of Ferndale, CaliforniaSat, Nov 9, 8:44 PM PST · 14936 days ago · 11 km deep · 72 km away
48. 1.828 km W of Paskenta, CaliforniaMon, Nov 11, 5:25 AM PST · 14935 days ago · 15 km deep · 84 km away
49. 1.77 km NE of Phillipsville, CaliforniaMon, Nov 11, 4:24 PM PST · 14934 days ago · 8 km deep · 19 km away
50. 2.88 km E of Leggett, CaliforniaMon, Nov 11, 8:15 PM PST · 14934 days ago · 0 km deep · 34 km away
51. 2.613 km N of Brooktrails, CaliforniaMon, Nov 11, 8:57 PM PST · 14934 days ago · 9 km deep · 71 km away
52. 2.646 km WSW of Ferndale, CaliforniaMon, Nov 11, 11:10 PM PST · 14934 days ago · 1 km deep · 80 km away
53. 2.537 km SSW of Ferndale, CaliforniaTue, Nov 12, 2:17 AM PST · 14934 days ago · 21 km deep · 61 km away
54. 1.610 km W of Ferndale, CaliforniaWed, Nov 13, 1:35 AM PST · 14933 days ago · 15 km deep · 70 km away
55. 1.630 km ENE of Covelo, CaliforniaWed, Nov 13, 3:41 AM PST · 14933 days ago · 16 km deep · 79 km away
56. 1.513 km N of Brooktrails, CaliforniaWed, Nov 13, 4:27 AM PST · 14933 days ago · 9 km deep · 71 km away
57. 1.78 km N of Laytonville, CaliforniaWed, Nov 13, 6:29 AM PST · 14933 days ago · 3 km deep · 49 km away
58. 1.66 km ENE of Brooktrails, CaliforniaFri, Nov 15, 5:43 AM PST · 14931 days ago · 7 km deep · 83 km away
59. 1.514 km SSE of Laytonville, CaliforniaSun, Nov 17, 4:03 AM PST · 14929 days ago · 10 km deep · 70 km away
60. 1.819 km WSW of Scotia, CASun, Nov 17, 9:26 AM PST · 14929 days ago · 4 km deep · 51 km away

The first 60 of 64.

Before

1. 2.127 km ESE of Covelo, CaliforniaFri, Sep 20, 5:57 AM PDT · 14987 days ago · 4 km deep · 88 km away
2. 3.337 km SW of Ferndale, CaliforniaWed, Sep 11, 3:01 PM PDT · 14996 days ago · 2 km deep · 73 km away
3. 2.654 km SW of Ferndale, CaliforniaTue, Sep 10, 9:37 PM PDT · 14996 days ago · 7 km deep · 80 km away
4. 2.837 km SW of Ferndale, CaliforniaSat, Sep 7, 7:55 AM PDT · 15000 days ago · 21 km deep · 63 km away
5. 2.938 km SW of Ferndale, CaliforniaFri, Sep 6, 6:14 AM PDT · 15001 days ago · 19 km deep · 66 km away
6. 1.620 km W of Hyampom, CaliforniaFri, Sep 6, 12:57 AM PDT · 15001 days ago · 18 km deep · 58 km away
7. 1.622 km W of Hyampom, CaliforniaThu, Sep 5, 8:00 PM PDT · 15001 days ago · 4 km deep · 54 km away
8. 2.121 km W of Hyampom, CaliforniaThu, Sep 5, 7:36 PM PDT · 15001 days ago · 22 km deep · 61 km away
9. 2.529 km SW of Ferndale, CaliforniaThu, Sep 5, 7:14 PM PDT · 15001 days ago · 16 km deep · 69 km away
10. 2.58 km SE of Alderpoint, CaliforniaThu, Sep 5, 12:30 PM PDT · 15002 days ago · 3 km deep · 24 km away
11. 2.59 km SSW of Hyampom, CaliforniaWed, Sep 4, 9:57 PM PDT · 15002 days ago · 5 km deep · 56 km away
12. 1.616 km ENE of Leggett, CaliforniaMon, Sep 2, 11:52 PM PDT · 15004 days ago · 2 km deep · 35 km away
13. 2.024 km WSW of Ferndale, CaliforniaMon, Sep 2, 10:47 AM PDT · 15005 days ago · 26 km deep · 69 km away
14. 3.722 km NW of Mad River, CaliforniaMon, Sep 2, 9:53 AM PDT · 15005 days ago · 23 km deep · 53 km away
15. 1.89 km ESE of Willits, CaliforniaMon, Sep 2, 6:42 AM PDT · 15005 days ago · 8 km deep · 94 km away
16. 2.4near the coast of Northern CaliforniaSun, Sep 1, 1:18 PM PDT · 15006 days ago · 13 km deep · 67 km away
17. 1.925 km SSW of Scotia, CaliforniaSat, Aug 31, 1:38 AM PDT · 15007 days ago · 7 km deep · 38 km away
18. 2.419 km SSE of Blue Lake, CaliforniaFri, Aug 30, 2:21 AM PDT · 15008 days ago · 24 km deep · 69 km away
19. 2.20 km S of Brooktrails, CaliforniaTue, Aug 27, 11:20 PM PDT · 15010 days ago · -1 km deep · 84 km away
20. 2.644 km WSW of Ferndale, CaliforniaTue, Aug 27, 8:23 AM PDT · 15011 days ago · 17 km deep · 80 km away

From the USGS Earthquake Hazards Program and its partner networks, event nc56090. Read Fri, Oct 2, 2026, 10:25 AM UTC.