M4.0 earthquake 36 km SSW of Ferndale, California

Magnitude

4.0 (ml), light

Local time

Sat, Jun 20, 1981, 11:20 PM PDT

UTC

1981-06-21 06:20:39 UTC

Depth

22.3 km (13.9 mi), shallow

Epicenter

40.294° N, 124.484° W

Region

California

Tsunami flag

No

Status

Reviewed by a seismologist

Location uncertainty

About 1.3 km horizontally, 0.6 km in depth

Depth from

From location

Station coverage gap

241°, poorly surrounded by stations

Stations used

31

• Ferndale, CaliforniaPopulation 1,369. Forecast36 kmSSW
• Fortuna, CaliforniaPopulation 12,000. Forecast44 kmSW
• Chico, CaliforniaPopulation 121,345. Forecast234 kmWNW
• Los Angeles, CaliforniaPopulation 3,820,914. Forecast887 kmNW

After

1. 3.136 km SSW of Ferndale, CaliforniaSun, Jun 21, 3:10 AM PDT · 16529 days ago · 22 km deep · 1 km away
2. 1.815 km W of Mad River, CaliforniaSun, Jun 21, 11:35 PM PDT · 16529 days ago · 1 km deep · 70 km away
3. 1.634 km SSW of Ferndale, CaliforniaMon, Jun 22, 4:54 AM PDT · 16528 days ago · 23 km deep · 2 km away
4. 2.34 km NNW of Blue Lake, CaliforniaMon, Jun 22, 1:45 PM PDT · 16528 days ago · 5 km deep · 81 km away
5. 1.616 km WNW of Manila, CaliforniaTue, Jun 23, 2:36 PM PDT · 16527 days ago · 0 km deep · 71 km away
6. 4.087 km W of Ferndale, CaliforniaTue, Jun 23, 2:50 PM PDT · 16527 days ago · 5 km deep · 70 km away
7. 2.140 km SW of Ferndale, CaliforniaTue, Jun 23, 5:15 PM PDT · 16527 days ago · 27 km deep · 12 km away
8. 3.263 km WSW of Ferndale, CaliforniaWed, Jun 24, 12:36 AM PDT · 16527 days ago · 24 km deep · 42 km away
9. 1.917 km W of Ferndale, CaliforniaWed, Jun 24, 1:36 AM PDT · 16527 days ago · 19 km deep · 34 km away
10. 2.041 km SW of Ferndale, CaliforniaWed, Jun 24, 4:40 AM PDT · 16526 days ago · 29 km deep · 12 km away
11. 1.938 km WNW of Indianola, CaliforniaWed, Jun 24, 6:51 AM PDT · 16526 days ago · 18 km deep · 57 km away
12. 3.542 km SW of Ferndale, CaliforniaWed, Jun 24, 7:15 AM PDT · 16526 days ago · 27 km deep · 15 km away
13. 2.480 km W of Ferndale, CaliforniaWed, Jun 24, 12:11 PM PDT · 16526 days ago · 4 km deep · 66 km away
14. 3.635 km SW of Scotia, CaliforniaThu, Jun 25, 4:37 AM PDT · 16525 days ago · 28 km deep · 6 km away
15. 1.626 km W of Indianola, CaliforniaThu, Jun 25, 6:20 AM PDT · 16525 days ago · 22 km deep · 45 km away
16. 3.527 km SSW of Ferndale, CaliforniaThu, Jun 25, 4:16 PM PDT · 16525 days ago · 17 km deep · 11 km away
17. 2.346 km SW of Ferndale, CaliforniaFri, Jun 26, 5:29 AM PDT · 16524 days ago · 30 km deep · 20 km away
18. 2.4near the coast of Northern CaliforniaFri, Jun 26, 11:39 PM PDT · 16524 days ago · 23 km deep · 4 km away
19. 3.817 km WSW of Redcrest, CaliforniaSat, Jun 27, 6:58 AM PDT · 16523 days ago · 34 km deep · 31 km away
20. 2.116 km SSW of Scotia, CaliforniaSat, Jun 27, 7:01 AM PDT · 16523 days ago · 32 km deep · 28 km away
21. 2.0near the coast of Northern CaliforniaMon, Jun 29, 2:10 PM PDT · 16521 days ago · 16 km deep · 98 km away
22. 3.0near the coast of Northern CaliforniaMon, Jun 29, 6:07 PM PDT · 16521 days ago · 22 km deep · 4 km away
23. 2.038 km SW of Ferndale, CAMon, Jun 29, 7:19 PM PDT · 16521 days ago · 32 km deep · 6 km away
24. 2.3near the coast of Northern CaliforniaMon, Jun 29, 9:55 PM PDT · 16521 days ago · 18 km deep · 92 km away
25. 2.137 km SW of Ferndale, CaliforniaTue, Jun 30, 1:51 AM PDT · 16521 days ago · 21 km deep · 5 km away
26. 2.09 km E of Redcrest, CaliforniaTue, Jun 30, 3:25 PM PDT · 16520 days ago · 30 km deep · 56 km away
27. 2.236 km SW of Ferndale, CaliforniaTue, Jun 30, 11:07 PM PDT · 16520 days ago · 28 km deep · 3 km away
28. 1.544 km SW of Ferndale, CaliforniaWed, Jul 1, 12:13 AM PDT · 16520 days ago · 22 km deep · 14 km away
29. 1.921 km W of Ferndale, CaliforniaWed, Jul 1, 12:54 AM PDT · 16520 days ago · 22 km deep · 30 km away
30. 2.035 km SSW of Ferndale, CaliforniaWed, Jul 1, 9:06 AM PDT · 16519 days ago · 25 km deep · 2 km away
31. 1.66 km SE of Ferndale, CaliforniaWed, Jul 1, 11:54 AM PDT · 16519 days ago · 2 km deep · 35 km away
32. 2.111 km WSW of Weott, CaliforniaWed, Jul 1, 8:19 PM PDT · 16519 days ago · 4 km deep · 38 km away
33. 1.66 km W of Trinidad, CaliforniaThu, Jul 2, 1:21 AM PDT · 16519 days ago · 19 km deep · 87 km away
34. 3.94 km SSW of Big Lagoon, CaliforniaThu, Jul 2, 1:22 AM PDT · 16519 days ago · 13 km deep · 97 km away
35. 3.14 km SSE of McKinleyville, CaliforniaThu, Jul 2, 11:49 PM PDT · 16518 days ago · 26 km deep · 77 km away
36. 2.326 km SSW of Ferndale, CaliforniaSat, Jul 4, 11:38 AM PDT · 16516 days ago · 25 km deep · 10 km away
37. 2.215 km WNW of Fields Landing, CaliforniaSat, Jul 4, 2:24 PM PDT · 16516 days ago · 8 km deep · 52 km away
38. 2.140 km SW of Ferndale, CaliforniaSat, Jul 4, 9:16 PM PDT · 16516 days ago · 31 km deep · 10 km away
39. 1.611 km SSW of Burnt Ranch, CaliforniaSat, Jul 4, 10:25 PM PDT · 16516 days ago · 30 km deep · 93 km away
40. 2.09 km NNW of Manila, CaliforniaMon, Jul 6, 2:29 AM PDT · 16515 days ago · 14 km deep · 74 km away
41. 1.816 km SW of Scotia, CaliforniaMon, Jul 6, 5:29 AM PDT · 16514 days ago · 29 km deep · 23 km away
42. 1.836 km SW of Ferndale, CaliforniaTue, Jul 7, 3:09 AM PDT · 16514 days ago · 22 km deep · 6 km away
43. 2.018 km SSW of Ferndale, CaliforniaTue, Jul 7, 5:10 PM PDT · 16513 days ago · 17 km deep · 19 km away
44. 1.912 km N of Alderpoint, CaliforniaThu, Jul 9, 3:07 PM PDT · 16511 days ago · 29 km deep · 73 km away
45. 2.121 km SW of Ferndale, CaliforniaThu, Jul 9, 11:59 PM PDT · 16511 days ago · 21 km deep · 15 km away
46. 3.883 km W of Ferndale, CaliforniaSat, Jul 11, 12:24 PM PDT · 16509 days ago · 5 km deep · 77 km away
47. 2.277 km W of Ferndale, CaliforniaSat, Jul 11, 1:20 PM PDT · 16509 days ago · 11 km deep · 73 km away
48. 2.05 km NW of Redway, CaliforniaSun, Jul 12, 6:04 AM PDT · 16508 days ago · 20 km deep · 55 km away
49. 2.242 km SW of Ferndale, CaliforniaSun, Jul 12, 4:55 PM PDT · 16508 days ago · 24 km deep · 14 km away
50. 1.916 km NW of Samoa, CaliforniaSun, Jul 12, 8:22 PM PDT · 16508 days ago · 0 km deep · 69 km away
51. 2.413 km NW of Manila, CaliforniaMon, Jul 13, 10:24 AM PDT · 16507 days ago · 12 km deep · 72 km away
52. 3.213 km NW of Manila, CaliforniaMon, Jul 13, 10:28 AM PDT · 16507 days ago · 11 km deep · 72 km away
53. 1.57 km WSW of Rio Dell, CaliforniaMon, Jul 13, 9:38 PM PDT · 16507 days ago · 17 km deep · 32 km away
54. 3.283 km WSW of Ferndale, CaliforniaTue, Jul 14, 9:42 AM PDT · 16506 days ago · 64 km deep · 65 km away
55. 2.438 km SW of Ferndale, CaliforniaTue, Jul 14, 7:11 PM PDT · 16506 days ago · 28 km deep · 10 km away
56. 1.72 km SSW of Loleta, CaliforniaWed, Jul 15, 12:15 PM PDT · 16505 days ago · 21 km deep · 41 km away
57. 2.345 km SW of Ferndale, CaliforniaWed, Jul 15, 10:22 PM PDT · 16505 days ago · 22 km deep · 18 km away
58. 2.144 km SW of Ferndale, CaliforniaThu, Jul 16, 12:39 AM PDT · 16505 days ago · 22 km deep · 15 km away
59. 1.749 km SW of Ferndale, CaliforniaThu, Jul 16, 3:58 AM PDT · 16504 days ago · 17 km deep · 21 km away
60. 1.738 km WSW of Ferndale, CaliforniaThu, Jul 16, 11:08 AM PDT · 16504 days ago · 27 km deep · 20 km away

The first 60 of 137.

Before

1. 3.159 km WSW of Ferndale, CaliforniaSat, Jun 20, 9:24 PM PDT · 16530 days ago · 14 km deep · 39 km away
2. 3.038 km SW of Ferndale, CaliforniaSat, Jun 20, 11:25 AM PDT · 16530 days ago · 23 km deep · 9 km away
3. 3.871 km WSW of Ferndale, CaliforniaSat, Jun 20, 6:32 AM PDT · 16530 days ago · 0 km deep · 52 km away
4. 1.618 km SW of Scotia, CaliforniaSat, Jun 20, 4:44 AM PDT · 16530 days ago · 31 km deep · 21 km away
5. 2.621 km SSW of Ferndale, CaliforniaSat, Jun 20, 3:13 AM PDT · 16530 days ago · 23 km deep · 15 km away
6. 2.415 km SSW of Mad River, CaliforniaSat, Jun 20, 1:29 AM PDT · 16531 days ago · 7 km deep · 74 km away
7. 1.720 km SW of Scotia, CaliforniaFri, Jun 19, 9:24 PM PDT · 16531 days ago · 31 km deep · 18 km away
8. 1.52 km NNW of Indianola, CaliforniaFri, Jun 19, 7:57 PM PDT · 16531 days ago · 2 km deep · 50 km away
9. 1.621 km WNW of Hyampom, CaliforniaFri, Jun 19, 7:14 PM PDT · 16531 days ago · 26 km deep · 79 km away
10. 2.052 km W of Ferndale, CaliforniaFri, Jun 19, 9:03 AM PDT · 16531 days ago · 12 km deep · 48 km away
11. 2.067 km WSW of Ferndale, CaliforniaFri, Jun 19, 8:31 AM PDT · 16531 days ago · 5 km deep · 50 km away
12. 3.586 km WSW of Ferndale, CaliforniaFri, Jun 19, 1:39 AM PDT · 16532 days ago · 68 km deep · 66 km away
13. 2.726 km WNW of Samoa, CaliforniaThu, Jun 18, 9:12 PM PDT · 16532 days ago · 4 km deep · 71 km away
14. 2.932 km SW of Scotia, CaliforniaThu, Jun 18, 6:51 PM PDT · 16532 days ago · 25 km deep · 10 km away
15. 2.437 km SW of Ferndale, CaliforniaThu, Jun 18, 5:56 AM PDT · 16532 days ago · 25 km deep · 9 km away
16. 2.237 km SW of Ferndale, CaliforniaWed, Jun 17, 12:03 PM PDT · 16533 days ago · 35 km deep · 8 km away
17. 2.14 km ENE of Garberville, CaliforniaTue, Jun 16, 8:39 PM PDT · 16534 days ago · 4 km deep · 66 km away
18. 2.327 km SW of Scotia, CaliforniaTue, Jun 16, 10:03 AM PDT · 16534 days ago · 13 km deep · 16 km away
19. 2.537 km SW of Ferndale, CaliforniaTue, Jun 16, 1:39 AM PDT · 16535 days ago · 22 km deep · 8 km away
20. 2.739 km SW of Ferndale, CaliforniaMon, Jun 15, 11:08 PM PDT · 16535 days ago · 24 km deep · 10 km away

From the USGS Earthquake Hazards Program and its partner networks, event nc1064735 (also filed as usp0001e91). Read Tue, Sep 22, 2026, 9:39 PM UTC.