M3.3 earthquake 10 km SW of Mad River, California

Magnitude

3.3 (md), minor

Local time

Tue, Oct 6, 1981, 12:16 AM PDT

UTC

1981-10-06 07:16:11 UTC

Depth

21.7 km (13.5 mi), shallow

Epicenter

40.375° N, 123.578° W

Region

California

Tsunami flag

No

Status

Reviewed by a seismologist

Location uncertainty

About 0.5 km horizontally, 0.5 km in depth

Magnitude uncertainty

±0.08

Depth from

From location

Station coverage gap

110°

Stations used

30

• Miranda, CaliforniaPopulation 520. Forecast26 kmNE
• Fortuna, CaliforniaPopulation 12,000. Forecast55 kmESE
• Chico, CaliforniaPopulation 121,345. Forecast165 kmWNW
• Los Angeles, CaliforniaPopulation 3,820,914. Forecast847 kmNNW

After

1. 3.210 km SSW of Mad River, CaliforniaTue, Oct 6, 5:28 AM PDT · 16422 days ago · 21 km deep · 1 km away
2. 2.410 km SSW of Mad River, CaliforniaTue, Oct 6, 5:40 AM PDT · 16422 days ago · 20 km deep · 1 km away
3. 1.634 km SW of Scotia, CaliforniaTue, Oct 6, 10:49 AM PDT · 16422 days ago · 18 km deep · 71 km away
4. 1.643 km SW of Ferndale, CaliforniaTue, Oct 6, 1:04 PM PDT · 16422 days ago · 21 km deep · 89 km away
5. 1.79 km S of Ferndale, CaliforniaTue, Oct 6, 1:14 PM PDT · 16422 days ago · 22 km deep · 58 km away
6. 2.07 km W of Rio Dell, CaliforniaWed, Oct 7, 10:59 PM PDT · 16420 days ago · 21 km deep · 54 km away
7. 2.541 km SW of Ferndale, CaliforniaWed, Oct 7, 11:46 PM PDT · 16420 days ago · 25 km deep · 88 km away
8. 1.835 km SW of Ferndale, CaliforniaThu, Oct 8, 2:56 AM PDT · 16420 days ago · 28 km deep · 81 km away
9. 1.94 km N of Redway, CaliforniaThu, Oct 8, 3:50 PM PDT · 16420 days ago · 20 km deep · 31 km away
10. 3.037 km SW of Ferndale, CaliforniaFri, Oct 9, 10:19 AM PDT · 16419 days ago · 27 km deep · 83 km away
11. 1.733 km SW of Ferndale, CaliforniaFri, Oct 9, 4:08 PM PDT · 16419 days ago · 35 km deep · 78 km away
12. 1.736 km SW of Ferndale, CaliforniaSat, Oct 10, 1:13 PM PDT · 16418 days ago · 26 km deep · 81 km away
13. 1.810 km SW of Trinity Village, CaliforniaSun, Oct 11, 2:49 AM PDT · 16417 days ago · 22 km deep · 48 km away
14. 1.535 km SSW of Ferndale, CaliforniaSun, Oct 11, 3:13 PM PDT · 16417 days ago · 23 km deep · 76 km away
15. 1.738 km SW of Ferndale, CaliforniaSun, Oct 11, 8:46 PM PDT · 16416 days ago · 37 km deep · 87 km away
16. 2.517 km WSW of Scotia, CaliforniaMon, Oct 12, 6:59 AM PDT · 16416 days ago · 28 km deep · 60 km away
17. 1.618 km WSW of Scotia, CaliforniaMon, Oct 12, 7:10 AM PDT · 16416 days ago · 28 km deep · 61 km away
18. 2.243 km SW of Ferndale, CaliforniaMon, Oct 12, 8:20 PM PDT · 16415 days ago · 17 km deep · 90 km away
19. 1.59 km W of Ferndale, CaliforniaTue, Oct 13, 2:01 AM PDT · 16415 days ago · 22 km deep · 71 km away
20. 3.336 km SW of Ferndale, CaliforniaTue, Oct 13, 9:36 AM PDT · 16415 days ago · 28 km deep · 83 km away
21. 1.58 km SW of Scotia, CaliforniaTue, Oct 13, 9:28 PM PDT · 16414 days ago · 31 km deep · 50 km away
22. 1.620 km SSW of Ferndale, CaliforniaWed, Oct 14, 12:07 AM PDT · 16414 days ago · 4 km deep · 66 km away
23. 1.737 km SSW of Ferndale, CaliforniaWed, Oct 14, 3:31 AM PDT · 16414 days ago · 19 km deep · 75 km away
24. 2.13 km NE of Redway, CaliforniaWed, Oct 14, 10:39 AM PDT · 16414 days ago · 20 km deep · 31 km away
25. 2.436 km SW of Ferndale, CaliforniaFri, Oct 16, 5:26 AM PDT · 16412 days ago · 27 km deep · 82 km away
26. 2.939 km SW of Ferndale, CAFri, Oct 16, 7:20 AM PDT · 16412 days ago · 25 km deep · 86 km away
27. 1.633 km SW of Ferndale, CaliforniaFri, Oct 16, 6:41 PM PDT · 16411 days ago · 23 km deep · 85 km away
28. 1.616 km WNW of Junction City, CaliforniaSat, Oct 17, 4:05 AM PDT · 16411 days ago · 18 km deep · 52 km away
29. 1.615 km WSW of Ferndale, CaliforniaSat, Oct 17, 5:03 AM PDT · 16411 days ago · 24 km deep · 73 km away
30. 1.643 km SW of Ferndale, CaliforniaSat, Oct 17, 8:38 AM PDT · 16411 days ago · 32 km deep · 94 km away
31. 1.628 km SW of Ferndale, CaliforniaSat, Oct 17, 11:52 AM PDT · 16411 days ago · 25 km deep · 80 km away
32. 1.814 km WNW of Samoa, CaliforniaSat, Oct 17, 8:26 PM PDT · 16410 days ago · 25 km deep · 84 km away
33. 1.518 km SW of Scotia, CaliforniaSun, Oct 18, 12:58 AM PDT · 16410 days ago · 22 km deep · 57 km away
34. 1.641 km SW of Ferndale, CaliforniaSun, Oct 18, 4:14 AM PDT · 16410 days ago · 20 km deep · 87 km away
35. 2.036 km SSW of Ferndale, CaliforniaSun, Oct 18, 10:46 AM PDT · 16410 days ago · 21 km deep · 78 km away
36. 1.96 km SE of Ferndale, CaliforniaSun, Oct 18, 10:03 PM PDT · 16409 days ago · 11 km deep · 56 km away
37. 1.822 km WSW of Weott, CaliforniaMon, Oct 19, 5:27 AM PDT · 16409 days ago · 4 km deep · 52 km away
38. 1.638 km WSW of Ferndale, CaliforniaMon, Oct 19, 8:48 AM PDT · 16409 days ago · 31 km deep · 93 km away
39. 3.09 km N of Hyampom, CaliforniaMon, Oct 19, 4:34 PM PDT · 16409 days ago · 17 km deep · 38 km away
40. 1.539 km SSW of Ferndale, CaliforniaTue, Oct 20, 10:43 PM PDT · 16407 days ago · 25 km deep · 79 km away
41. 2.134 km SSW of Ferndale, CaliforniaTue, Oct 20, 11:52 PM PDT · 16407 days ago · 25 km deep · 77 km away
42. 1.718 km W of Ferndale, CaliforniaWed, Oct 21, 8:51 AM PDT · 16407 days ago · 22 km deep · 78 km away
43. 3.515 km N of Brooktrails, CaliforniaThu, Oct 22, 4:00 AM PDT · 16406 days ago · 9 km deep · 91 km away
44. 1.640 km SSW of Ferndale, CaliforniaThu, Oct 22, 11:27 AM PDT · 16406 days ago · 25 km deep · 80 km away
45. 1.837 km SW of Ferndale, CaliforniaThu, Oct 22, 2:23 PM PDT · 16406 days ago · 24 km deep · 80 km away
46. 2.936 km SSW of Ferndale, CaliforniaFri, Oct 23, 2:20 AM PDT · 16405 days ago · 12 km deep · 77 km away
47. 2.015 km SSW of Ferndale, CaliforniaFri, Oct 23, 3:26 PM PDT · 16405 days ago · 23 km deep · 64 km away
48. 2.416 km SSW of Ferndale, CaliforniaFri, Oct 23, 3:27 PM PDT · 16405 days ago · 23 km deep · 65 km away
49. 2.619 km WSW of Scotia, CaliforniaSat, Oct 24, 5:41 AM PDT · 16404 days ago · 26 km deep · 62 km away
50. 3.136 km SW of Ferndale, CaliforniaSat, Oct 24, 9:10 AM PDT · 16404 days ago · 28 km deep · 82 km away
51. 3.837 km SW of Ferndale, CaliforniaSun, Oct 25, 9:18 AM PST · 16403 days ago · 28 km deep · 84 km away
52. 2.936 km SW of Ferndale, CaliforniaSun, Oct 25, 9:21 AM PST · 16403 days ago · 27 km deep · 82 km away
53. 1.837 km SW of Ferndale, CaliforniaSun, Oct 25, 10:01 AM PST · 16403 days ago · 28 km deep · 84 km away
54. 2.129 km WSW of Paskenta, CaliforniaSun, Oct 25, 9:21 PM PST · 16402 days ago · 11 km deep · 87 km away
55. 1.632 km SW of Ferndale, CaliforniaMon, Oct 26, 11:21 AM PST · 16402 days ago · 39 km deep · 78 km away
56. 2.532 km WSW of Ferndale, CaliforniaMon, Oct 26, 12:47 PM PST · 16402 days ago · 26 km deep · 86 km away
57. 1.64 km WSW of Redcrest, CaliforniaMon, Oct 26, 1:45 PM PST · 16402 days ago · 35 km deep · 35 km away
58. 2.01 km NE of Bayview, CaliforniaMon, Oct 26, 3:32 PM PST · 16402 days ago · 11 km deep · 68 km away
59. 2.136 km SW of Ferndale, CaliforniaMon, Oct 26, 5:18 PM PST · 16401 days ago · 33 km deep · 82 km away
60. 1.945 km SW of Ferndale, CaliforniaTue, Oct 27, 3:18 PM PST · 16401 days ago · 20 km deep · 92 km away

The first 60 of 156.

Before

1. 2.112 km WSW of Weott, CaliforniaMon, Oct 5, 7:44 PM PDT · 16422 days ago · 4 km deep · 41 km away
2. 1.738 km SW of Ferndale, CaliforniaMon, Oct 5, 4:41 PM PDT · 16423 days ago · 23 km deep · 82 km away
3. 1.837 km SW of Ferndale, CaliforniaMon, Oct 5, 3:28 PM PDT · 16423 days ago · 23 km deep · 81 km away
4. 3.337 km SW of Ferndale, CaliforniaMon, Oct 5, 3:18 PM PDT · 16423 days ago · 25 km deep · 81 km away
5. 1.636 km SW of Ferndale, CaliforniaMon, Oct 5, 2:45 PM PDT · 16423 days ago · 34 km deep · 80 km away
6. 2.714 km WSW of Scotia, CaliforniaMon, Oct 5, 4:40 AM PDT · 16423 days ago · 28 km deep · 59 km away
7. 1.534 km SW of Ferndale, CaliforniaSun, Oct 4, 7:08 PM PDT · 16423 days ago · 34 km deep · 78 km away
8. 1.540 km SW of Ferndale, CaliforniaSun, Oct 4, 6:39 PM PDT · 16423 days ago · 30 km deep · 90 km away
9. 1.97 km SSE of Laytonville, CaliforniaSun, Oct 4, 6:32 PM PDT · 16423 days ago · 5 km deep · 84 km away
10. 1.925 km SSW of Ferndale, CASun, Oct 4, 4:31 PM PDT · 16424 days ago · 15 km deep · 67 km away
11. 1.65 km S of Ferndale, CaliforniaSun, Oct 4, 4:36 AM PDT · 16424 days ago · 26 km deep · 60 km away
12. 2.14 km SW of Big Lagoon, CaliforniaSun, Oct 4, 3:02 AM PDT · 16424 days ago · 13 km deep · 97 km away
13. 2.034 km SW of Ferndale, CaliforniaSat, Oct 3, 5:10 PM PDT · 16424 days ago · 27 km deep · 86 km away
14. 2.822 km WSW of Weott, CaliforniaSat, Oct 3, 9:46 AM PDT · 16425 days ago · 7 km deep · 51 km away
15. 2.52 km NE of Redway, CaliforniaSat, Oct 3, 5:56 AM PDT · 16425 days ago · 19 km deep · 33 km away
16. 1.83 km S of Humboldt Hill, CaliforniaSat, Oct 3, 1:59 AM PDT · 16425 days ago · 17 km deep · 63 km away
17. 2.138 km SW of Ferndale, CaliforniaFri, Oct 2, 6:31 AM PDT · 16426 days ago · 27 km deep · 83 km away
18. 2.037 km SW of Ferndale, CaliforniaFri, Oct 2, 4:06 AM PDT · 16426 days ago · 32 km deep · 84 km away
19. 2.239 km SW of Ferndale, CaliforniaThu, Oct 1, 4:28 AM PDT · 16427 days ago · 29 km deep · 87 km away
20. 2.029 km WSW of Paskenta, CaliforniaWed, Sep 30, 11:23 PM PDT · 16427 days ago · 2 km deep · 92 km away

From the USGS Earthquake Hazards Program and its partner networks, event nc1068333. Read Tue, Sep 22, 2026, 11:17 AM UTC.