M1.7 earthquake 21 km WNW of Mad River, California

Magnitude

1.7 (Md, duration), micro

Magnitude from

Northern California Seismic System

Local time

Fri, Oct 1, 1982, 10:09 PM PDT

UTC

1982-10-02 05:09:02 UTC

Depth

23.5 km (14.6 mi), shallow

Epicenter

40.543° N, 123.734° W

Region

California

Tsunami flag

No

Status

Reviewed by a seismologist

Location uncertainty

About 0.5 km horizontally, 0.6 km in depth

Magnitude uncertainty

±0.08

Depth from

From location

Station coverage gap

113°

Stations used

17

• Hydesville, CaliforniaPopulation 1,237. Forecast31 kmE
• Fortuna, CaliforniaPopulation 12,000. Forecast36 kmE
• Chico, CaliforniaPopulation 121,345. Forecast185 kmWNW
• Los Angeles, CaliforniaPopulation 3,820,914. Forecast869 kmNNW

After

1. 2.320 km SSW of Ferndale, CaliforniaSat, Oct 2, 7:24 AM PDT · 16071 days ago · 26 km deep · 53 km away
2. 1.621 km SSW of Ferndale, CaliforniaSat, Oct 2, 7:26 AM PDT · 16071 days ago · 27 km deep · 53 km away
3. 1.526 km W of Hyampom, CaliforniaSun, Oct 3, 1:36 AM PDT · 16070 days ago · 25 km deep · 14 km away
4. 1.936 km SSW of Ferndale, CaliforniaSun, Oct 3, 3:23 AM PDT · 16070 days ago · 13 km deep · 69 km away
5. 1.729 km SSW of Ferndale, CaliforniaSun, Oct 3, 7:44 PM PDT · 16070 days ago · 17 km deep · 65 km away
6. 1.738 km WSW of Ferndale, CaliforniaTue, Oct 5, 7:25 PM PDT · 16068 days ago · 26 km deep · 83 km away
7. 1.525 km SW of Ferndale, CaliforniaWed, Oct 6, 11:29 PM PDT · 16067 days ago · 28 km deep · 65 km away
8. 1.55 km ENE of Laytonville, CaliforniaSat, Oct 9, 3:35 AM PDT · 16064 days ago · 4 km deep · 98 km away
9. 1.77 km NNE of Mad River, CaliforniaSat, Oct 9, 3:37 AM PDT · 16064 days ago · 22 km deep · 23 km away
10. 2.437 km SW of Ferndale, CaliforniaSat, Oct 9, 11:41 AM PDT · 16064 days ago · 21 km deep · 74 km away
11. 1.79 km ENE of Benbow, CaliforniaSun, Oct 10, 4:02 PM PDT · 16063 days ago · 29 km deep · 50 km away
12. 2.455 km WSW of Ferndale, CaliforniaMon, Oct 11, 2:20 AM PDT · 16062 days ago · 5 km deep · 96 km away
13. 3.315 km WSW of Ferndale, CaliforniaTue, Oct 12, 5:18 AM PDT · 16061 days ago · 24 km deep · 59 km away
14. 2.216 km WNW of Ferndale, CaliforniaTue, Oct 12, 6:48 AM PDT · 16061 days ago · 23 km deep · 61 km away
15. 1.621 km SW of Ferndale, CaliforniaWed, Oct 13, 8:49 PM PDT · 16060 days ago · 21 km deep · 60 km away
16. 1.635 km SW of Ferndale, CaliforniaThu, Oct 14, 6:54 AM PDT · 16059 days ago · 24 km deep · 74 km away
17. 1.910 km S of Douglas City, CaliforniaThu, Oct 14, 10:58 AM PDT · 16059 days ago · 3 km deep · 67 km away
18. 2.139 km SW of Ferndale, CaliforniaThu, Oct 14, 2:19 PM PDT · 16059 days ago · 22 km deep · 77 km away
19. 1.634 km SW of Scotia, CaliforniaThu, Oct 14, 5:22 PM PDT · 16059 days ago · 19 km deep · 65 km away
20. 1.829 km SW of Scotia, CaliforniaFri, Oct 15, 12:30 AM PDT · 16059 days ago · 20 km deep · 57 km away
21. 2.828 km W of Trinidad, CaliforniaFri, Oct 15, 2:34 AM PDT · 16058 days ago · 17 km deep · 87 km away
22. 3.3near the coast of Northern CaliforniaFri, Oct 15, 4:00 AM PDT · 16058 days ago · 7 km deep · 72 km away
23. 2.037 km SW of Ferndale, CaliforniaSat, Oct 16, 2:54 AM PDT · 16057 days ago · 21 km deep · 73 km away
24. 2.940 km SW of Ferndale, CaliforniaSat, Oct 16, 6:47 PM PDT · 16057 days ago · 18 km deep · 77 km away
25. 1.717 km SW of Scotia, CaliforniaSat, Oct 16, 10:47 PM PDT · 16057 days ago · 25 km deep · 47 km away
26. 2.730 km SW of Ferndale, CaliforniaSun, Oct 17, 12:46 PM PDT · 16056 days ago · 25 km deep · 70 km away
27. 2.110 km S of Ferndale, CaliforniaSun, Oct 17, 8:17 PM PDT · 16056 days ago · 19 km deep · 47 km away
28. 1.910 km S of Ferndale, CaliforniaMon, Oct 18, 12:54 AM PDT · 16056 days ago · 19 km deep · 47 km away
29. 1.98 km SE of Blue Lake, CaliforniaTue, Oct 19, 2:06 PM PDT · 16054 days ago · -1 km deep · 35 km away
30. 2.729 km W of Trinidad, CaliforniaTue, Oct 19, 10:59 PM PDT · 16054 days ago · 19 km deep · 89 km away
31. 1.937 km WSW of Ferndale, CaliforniaWed, Oct 20, 5:54 AM PDT · 16053 days ago · 24 km deep · 80 km away
32. 2.57 km WNW of Trinidad, CaliforniaWed, Oct 20, 6:29 PM PDT · 16053 days ago · 19 km deep · 73 km away
33. 1.55 km NNE of Hydesville, CaliforniaThu, Oct 21, 12:31 AM PDT · 16053 days ago · 20 km deep · 28 km away
34. 1.939 km SW of Ferndale, CaliforniaThu, Oct 21, 1:19 AM PDT · 16052 days ago · 22 km deep · 74 km away
35. 1.941 km SW of Ferndale, CaliforniaFri, Oct 22, 12:11 AM PDT · 16052 days ago · 13 km deep · 76 km away
36. 2.426 km SSW of Ferndale, CaliforniaFri, Oct 22, 8:24 PM PDT · 16051 days ago · 18 km deep · 61 km away
37. 1.628 km SW of Scotia, CaliforniaSun, Oct 24, 8:42 AM PDT · 16049 days ago · 4 km deep · 56 km away
38. 1.522 km WSW of Ferndale, CaliforniaMon, Oct 25, 8:29 PM PDT · 16048 days ago · 22 km deep · 66 km away
39. 2.28 km SSW of Mad River, CaliforniaTue, Oct 26, 1:44 PM PDT · 16047 days ago · 30 km deep · 24 km away
40. 2.24 km SSE of Westhaven-Moonstone, CaliforniaTue, Oct 26, 8:56 PM PDT · 16047 days ago · 27 km deep · 59 km away
41. 2.127 km WNW of Samoa, CaliforniaThu, Oct 28, 1:14 AM PDT · 16045 days ago · 4 km deep · 77 km away
42. 1.521 km SW of Ferndale, CaliforniaThu, Oct 28, 4:38 PM PDT · 16045 days ago · 23 km deep · 62 km away
43. 1.623 km WSW of Weott, CaliforniaFri, Oct 29, 10:56 PM PDT · 16044 days ago · 9 km deep · 50 km away
44. 1.814 km NW of Junction City, CaliforniaSat, Oct 30, 6:41 AM PDT · 16043 days ago · 8 km deep · 59 km away
45. 2.09 km ESE of Pine Hills, CaliforniaSat, Oct 30, 8:43 AM PDT · 16043 days ago · 19 km deep · 32 km away
46. 2.310 km ESE of Pine Hills, CaliforniaSat, Oct 30, 8:44 AM PDT · 16043 days ago · 20 km deep · 31 km away
47. 1.631 km SW of Ferndale, CaliforniaSat, Oct 30, 10:19 AM PDT · 16043 days ago · 24 km deep · 68 km away
48. 1.712 km NE of Miranda, CaliforniaSun, Oct 31, 6:07 AM PST · 16042 days ago · 27 km deep · 24 km away
49. 1.910 km E of Redcrest, CaliforniaSun, Oct 31, 7:08 AM PST · 16042 days ago · 3 km deep · 18 km away
50. 1.629 km SW of Scotia, CaliforniaSun, Oct 31, 11:33 PM PST · 16042 days ago · 20 km deep · 57 km away
51. 2.46 km WSW of Benbow, CaliforniaMon, Nov 1, 4:26 PM PST · 16041 days ago · 3 km deep · 55 km away
52. 2.36 km WSW of Benbow, CaliforniaMon, Nov 1, 7:17 PM PST · 16041 days ago · 2 km deep · 56 km away
53. 2.336 km WSW of Ferndale, CaliforniaTue, Nov 2, 1:51 AM PST · 16040 days ago · 27 km deep · 80 km away
54. 2.19 km WSW of Ferndale, CaliforniaTue, Nov 2, 4:53 AM PST · 16040 days ago · 17 km deep · 54 km away
55. 2.141 km WSW of Ferndale, CaliforniaWed, Nov 3, 7:46 AM PST · 16039 days ago · 22 km deep · 85 km away
56. 1.837 km SSW of Ferndale, CaliforniaThu, Nov 4, 12:01 AM PST · 16039 days ago · 5 km deep · 70 km away
57. 1.64 km W of Trinity Village, CaliforniaThu, Nov 4, 6:18 AM PST · 16038 days ago · 23 km deep · 39 km away
58. 1.921 km WSW of Ferndale, CaliforniaSat, Nov 6, 4:49 PM PST · 16036 days ago · 23 km deep · 63 km away
59. 1.77 km NNW of Hyampom, CaliforniaTue, Nov 9, 1:50 PM PST · 16033 days ago · 31 km deep · 25 km away
60. 1.66 km WSW of Covelo, CaliforniaWed, Nov 10, 2:41 AM PST · 16032 days ago · 7 km deep · 94 km away

The first 60 of 90.

Before

1. 1.514 km ENE of Weott, CaliforniaFri, Oct 1, 8:14 AM PDT · 16072 days ago · 25 km deep · 20 km away
2. 1.518 km SSW of Ferndale, CaliforniaFri, Oct 1, 12:55 AM PDT · 16073 days ago · 27 km deep · 56 km away
3. 1.543 km SW of Ferndale, CaliforniaWed, Sep 29, 10:17 AM PDT · 16074 days ago · 17 km deep · 80 km away
4. 1.627 km WSW of Ferndale, CaliforniaWed, Sep 29, 12:55 AM PDT · 16075 days ago · 23 km deep · 68 km away
5. 2.934 km WSW of Ferndale, CaliforniaWed, Sep 29, 12:20 AM PDT · 16075 days ago · 24 km deep · 76 km away
6. 1.65 km SE of Ferndale, CaliforniaMon, Sep 27, 5:58 AM PDT · 16076 days ago · 10 km deep · 41 km away
7. 1.68 km NW of Laytonville, CaliforniaSun, Sep 26, 12:46 AM PDT · 16078 days ago · 11 km deep · 91 km away
8. 1.98 km S of Benbow, CaliforniaSat, Sep 25, 3:09 PM PDT · 16078 days ago · 5 km deep · 62 km away
9. 2.419 km WNW of Ferndale, CaliforniaSat, Sep 25, 1:36 PM PDT · 16078 days ago · 22 km deep · 64 km away
10. 1.636 km SW of Ferndale, CaliforniaSat, Sep 25, 9:24 AM PDT · 16078 days ago · 27 km deep · 71 km away
11. 2.08 km NNW of Leggett, CaliforniaFri, Sep 24, 3:09 PM PDT · 16079 days ago · -1 km deep · 68 km away
12. 1.87 km N of Redcrest, CaliforniaFri, Sep 24, 12:18 AM PDT · 16080 days ago · 53 km deep · 21 km away
13. 1.67 km ESE of Hydesville, CaliforniaThu, Sep 23, 9:55 PM PDT · 16080 days ago · 21 km deep · 23 km away
14. 1.59 km ESE of Blue Lake, CaliforniaThu, Sep 23, 6:23 PM PDT · 16080 days ago · 26 km deep · 36 km away
15. 1.718 km WSW of Ferndale, CaliforniaThu, Sep 23, 4:47 AM PDT · 16080 days ago · 22 km deep · 60 km away
16. 1.614 km SSW of Ferndale, CaliforniaWed, Sep 22, 11:42 AM PDT · 16081 days ago · 27 km deep · 52 km away
17. 1.921 km SSW of Ferndale, CaliforniaTue, Sep 21, 11:17 PM PDT · 16082 days ago · 29 km deep · 57 km away
18. 2.09 km E of Hydesville, CaliforniaTue, Sep 21, 5:36 PM PDT · 16082 days ago · 22 km deep · 21 km away
19. 2.551 km W of Ferndale, CaliforniaTue, Sep 21, 9:34 AM PDT · 16082 days ago · 31 km deep · 96 km away
20. 2.819 km SW of Scotia, CaliforniaMon, Sep 20, 2:56 AM PDT · 16083 days ago · 30 km deep · 49 km away

From the USGS Earthquake Hazards Program and its partner networks, event nc1079825. Read Fri, Oct 2, 2026, 7:38 PM UTC.