M2.3 earthquake 71 km W of Ferndale, California

Magnitude

2.3 (md), micro

Local time

Tue, Jul 21, 1981, 8:26 AM PDT

UTC

1981-07-21 15:26:25 UTC

Depth

4.9 km (3.0 mi), shallow

Epicenter

40.561° N, 125.104° W

Region

California

Tsunami flag

No

Status

Reviewed by a seismologist

Location uncertainty

About 4.0 km horizontally, 9.0 km in depth

Magnitude uncertainty

±0.22

Depth from

From location

Station coverage gap

319°, poorly surrounded by stations

Stations used

16

• Ferndale, CaliforniaPopulation 1,369. Forecast71 kmW
• Fortuna, CaliforniaPopulation 12,000. Forecast80 kmW
• Chico, CaliforniaPopulation 121,345. Forecast293 kmWNW

After

1. 1.938 km SW of Ferndale, CaliforniaThu, Jul 23, 2:40 AM PDT · 16505 days ago · 33 km deep · 52 km away
2. 2.227 km WSW of Ferndale, CaliforniaThu, Jul 23, 8:36 AM PDT · 16505 days ago · 24 km deep · 50 km away
3. 1.730 km SW of Ferndale, CaliforniaThu, Jul 23, 9:57 AM PDT · 16505 days ago · 26 km deep · 49 km away
4. 1.737 km SW of Ferndale, CaliforniaFri, Jul 24, 1:40 AM PDT · 16504 days ago · 30 km deep · 55 km away
5. 2.898 km WSW of Ferndale, CaliforniaFri, Jul 24, 11:48 AM PDT · 16504 days ago · 15 km deep · 31 km away
6. 2.246 km W of Ferndale, CaliforniaFri, Jul 24, 3:15 PM PDT · 16504 days ago · 16 km deep · 25 km away
7. 1.96 km SSW of Fortuna, CaliforniaFri, Jul 24, 4:07 PM PDT · 16504 days ago · 10 km deep · 77 km away
8. 2.130 km W of Trinidad, CaliforniaFri, Jul 24, 8:05 PM PDT · 16503 days ago · 4 km deep · 71 km away
9. 2.027 km SW of Ferndale, CaliforniaSat, Jul 25, 12:37 PM PDT · 16503 days ago · 17 km deep · 57 km away
10. 2.122 km WSW of Weott, CaliforniaSun, Jul 26, 6:46 PM PDT · 16501 days ago · 9 km deep · 88 km away
11. 1.920 km SSW of Ferndale, CaliforniaMon, Jul 27, 2:54 AM PDT · 16501 days ago · 18 km deep · 65 km away
12. 2.538 km SW of Ferndale, CaliforniaMon, Jul 27, 7:51 PM PDT · 16500 days ago · 23 km deep · 51 km away
13. 1.72 km SW of Indianola, CaliforniaTue, Jul 28, 8:40 AM PDT · 16500 days ago · 9 km deep · 73 km away
14. 1.71 km SSW of Loleta, CaliforniaTue, Jul 28, 7:59 PM PDT · 16499 days ago · 17 km deep · 74 km away
15. 2.16 km SE of Scotia, CaliforniaWed, Jul 29, 4:16 PM PDT · 16499 days ago · 24 km deep · 91 km away
16. 2.07 km SSW of Scotia, CaliforniaThu, Jul 30, 6:54 AM PDT · 16498 days ago · 27 km deep · 83 km away
17. 2.449 km SW of Ferndale, CaliforniaFri, Jul 31, 1:41 PM PDT · 16497 days ago · 29 km deep · 43 km away
18. 2.638 km SW of Ferndale, CaliforniaSat, Aug 1, 6:10 AM PDT · 16496 days ago · 24 km deep · 51 km away
19. 2.35 km WSW of Rio Dell, CaliforniaSun, Aug 2, 11:35 AM PDT · 16495 days ago · 19 km deep · 79 km away
20. 2.128 km SW of Ferndale, CaliforniaMon, Aug 3, 3:47 AM PDT · 16494 days ago · 32 km deep · 50 km away
21. 1.636 km WSW of Ferndale, CaliforniaMon, Aug 3, 9:16 AM PDT · 16494 days ago · 25 km deep · 39 km away
22. 1.919 km SSW of Ferndale, CaliforniaWed, Aug 5, 12:15 AM PDT · 16492 days ago · 28 km deep · 69 km away
23. 2.059 km WNW of Indianola, CaliforniaWed, Aug 5, 12:44 AM PDT · 16492 days ago · 7 km deep · 34 km away
24. 3.2off the coast of Northern CaliforniaWed, Aug 5, 11:17 AM PDT · 16492 days ago · 4 km deep · 46 km away
25. 3.083 km WSW of Ferndale, CaliforniaWed, Aug 5, 11:17 AM PDT · 16492 days ago · 5 km deep · 17 km away
26. 2.037 km SW of Ferndale, CaliforniaThu, Aug 6, 9:20 AM PDT · 16491 days ago · 32 km deep · 52 km away
27. 3.273 km WSW of Ferndale, CaliforniaFri, Aug 7, 10:51 AM PDT · 16490 days ago · 12 km deep · 15 km away
28. 2.238 km SW of Ferndale, CaliforniaSat, Aug 8, 12:33 AM PDT · 16489 days ago · 20 km deep · 45 km away
29. 1.710 km SSW of Ferndale, CaliforniaSat, Aug 8, 9:15 AM PDT · 16489 days ago · 20 km deep · 66 km away
30. 2.838 km SW of Ferndale, CaliforniaSat, Aug 8, 10:07 AM PDT · 16489 days ago · 26 km deep · 51 km away
31. 2.253 km SW of Ferndale, CaliforniaSun, Aug 9, 7:58 PM PDT · 16487 days ago · 15 km deep · 39 km away
32. 2.512 km SSW of Ferndale, CaliforniaSun, Aug 9, 9:23 PM PDT · 16487 days ago · 18 km deep · 69 km away
33. 2.494 km W of Ferndale, CaliforniaWed, Aug 12, 6:51 PM PDT · 16484 days ago · 8 km deep · 26 km away
34. 2.139 km SW of Ferndale, CaliforniaThu, Aug 13, 3:12 AM PDT · 16484 days ago · 23 km deep · 54 km away
35. 2.04 km E of Indianola, CaliforniaThu, Aug 13, 11:44 AM PDT · 16484 days ago · -1 km deep · 94 km away
36. 2.815 km WSW of Trinidad, CaliforniaThu, Aug 13, 12:43 PM PDT · 16484 days ago · 12 km deep · 83 km away
37. 2.498 km W of Ferndale, CaliforniaThu, Aug 13, 8:22 PM PDT · 16483 days ago · 4 km deep · 30 km away
38. 3.091 km W of Ferndale, CaliforniaFri, Aug 14, 12:09 AM PDT · 16483 days ago · 40 km deep · 24 km away
39. 1.534 km SSW of Ferndale, CaliforniaFri, Aug 14, 2:50 AM PDT · 16483 days ago · 20 km deep · 62 km away
40. 1.842 km SW of Ferndale, CaliforniaFri, Aug 14, 5:39 AM PDT · 16483 days ago · 20 km deep · 50 km away
41. 2.8122 km W of Ferndale, CaliforniaFri, Aug 14, 8:17 AM PDT · 16483 days ago · 2 km deep · 51 km away
42. 2.615 km WSW of Scotia, CaliforniaFri, Aug 14, 9:35 AM PDT · 16483 days ago · 30 km deep · 73 km away
43. 1.616 km WNW of Fields Landing, CaliforniaFri, Aug 14, 3:41 PM PDT · 16483 days ago · 22 km deep · 63 km away
44. 1.96 km SSW of Fortuna, CaliforniaSat, Aug 15, 12:07 AM PDT · 16482 days ago · 11 km deep · 77 km away
45. 2.353 km W of Ferndale, CaliforniaSat, Aug 15, 4:41 PM PDT · 16482 days ago · 5 km deep · 18 km away
46. 2.02 km SE of Indianola, CaliforniaSat, Aug 15, 7:53 PM PDT · 16481 days ago · 14 km deep · 76 km away
47. 1.52 km SE of Indianola, CaliforniaSat, Aug 15, 8:00 PM PDT · 16481 days ago · 14 km deep · 76 km away
48. 2.017 km SSW of Ferndale, CaliforniaSat, Aug 15, 9:39 PM PDT · 16481 days ago · 23 km deep · 66 km away
49. 1.65 km SE of Ferndale, CaliforniaSun, Aug 16, 3:15 AM PDT · 16481 days ago · 12 km deep · 76 km away
50. 2.5105 km W of Ferndale, CaliforniaSun, Aug 16, 8:47 PM PDT · 16480 days ago · 4 km deep · 37 km away
51. 2.639 km SW of Ferndale, CaliforniaMon, Aug 17, 7:57 AM PDT · 16480 days ago · 21 km deep · 52 km away
52. 2.276 km WSW of Ferndale, CaliforniaMon, Aug 17, 5:24 PM PDT · 16479 days ago · 5 km deep · 26 km away
53. 3.037 km SW of Ferndale, CaliforniaTue, Aug 18, 6:27 PM PDT · 16478 days ago · 28 km deep · 53 km away
54. 2.037 km SW of Ferndale, CaliforniaTue, Aug 18, 11:49 PM PDT · 16478 days ago · 20 km deep · 57 km away
55. 2.837 km SW of Ferndale, CaliforniaWed, Aug 19, 6:12 AM PDT · 16478 days ago · 17 km deep · 53 km away
56. 1.7near the coast of Northern CaliforniaWed, Aug 19, 4:12 PM PDT · 16478 days ago · 10 km deep · 72 km away
57. 2.124 km SW of Scotia, CaliforniaWed, Aug 19, 4:13 PM PDT · 16478 days ago · 11 km deep · 74 km away
58. 1.7near the coast of Northern CaliforniaThu, Aug 20, 3:33 AM PDT · 16477 days ago · 21 km deep · 78 km away
59. 2.86 km WSW of Rio Dell, CaliforniaThu, Aug 20, 4:43 AM PDT · 16477 days ago · 22 km deep · 78 km away
60. 2.12 km SSW of Loleta, CaliforniaThu, Aug 20, 6:46 AM PDT · 16477 days ago · 19 km deep · 73 km away

The first 60 of 129.

Before

1. 2.539 km SW of Ferndale, CaliforniaTue, Jul 21, 1:54 AM PDT · 16507 days ago · 24 km deep · 51 km away
2. 1.889 km W of Trinidad, CaliforniaTue, Jul 21, 12:39 AM PDT · 16507 days ago · 5 km deep · 59 km away
3. 1.933 km SSW of Ferndale, CaliforniaMon, Jul 20, 7:55 AM PDT · 16508 days ago · 23 km deep · 62 km away
4. 1.621 km WSW of Weott, CaliforniaSun, Jul 19, 2:17 PM PDT · 16509 days ago · 3 km deep · 88 km away
5. 2.532 km SW of Scotia, CaliforniaSun, Jul 19, 7:13 AM PDT · 16509 days ago · 25 km deep · 68 km away
6. 1.58 km W of Rio Dell, CaliforniaSat, Jul 18, 10:18 AM PDT · 16510 days ago · 22 km deep · 76 km away
7. 2.280 km W of Ferndale, CaliforniaFri, Jul 17, 7:36 PM PDT · 16510 days ago · 3 km deep · 9 km away
8. 2.36 km ESE of Ferndale, CaliforniaFri, Jul 17, 5:23 PM PDT · 16510 days ago · 12 km deep · 77 km away
9. 2.06 km SE of Ferndale, CaliforniaFri, Jul 17, 12:28 PM PDT · 16511 days ago · 13 km deep · 76 km away
10. 3.436 km W of Trinidad, CaliforniaFri, Jul 17, 11:14 AM PDT · 16511 days ago · 18 km deep · 70 km away
11. 1.924 km NNW of Shelter Cove, CaliforniaFri, Jul 17, 10:42 AM PDT · 16511 days ago · 4 km deep · 86 km away
12. 2.822 km WSW of Weott, CaliforniaFri, Jul 17, 10:34 AM PDT · 16511 days ago · 8 km deep · 87 km away
13. 1.920 km WSW of Weott, CaliforniaFri, Jul 17, 10:05 AM PDT · 16511 days ago · 9 km deep · 89 km away
14. 1.823 km WSW of Weott, CaliforniaFri, Jul 17, 9:42 AM PDT · 16511 days ago · 4 km deep · 86 km away
15. 4.623 km WSW of Weott, CaliforniaFri, Jul 17, 9:37 AM PDT · 16511 days ago · 10 km deep · 87 km away
16. 1.738 km WSW of Ferndale, CaliforniaThu, Jul 16, 11:08 AM PDT · 16512 days ago · 27 km deep · 41 km away
17. 1.749 km SW of Ferndale, CaliforniaThu, Jul 16, 3:58 AM PDT · 16512 days ago · 17 km deep · 42 km away
18. 2.144 km SW of Ferndale, CaliforniaThu, Jul 16, 12:39 AM PDT · 16512 days ago · 22 km deep · 46 km away
19. 2.345 km SW of Ferndale, CaliforniaWed, Jul 15, 10:22 PM PDT · 16512 days ago · 22 km deep · 44 km away
20. 1.72 km SSW of Loleta, CaliforniaWed, Jul 15, 12:15 PM PDT · 16513 days ago · 21 km deep · 73 km away

From the USGS Earthquake Hazards Program and its partner networks, event nc1065793. Read Wed, Sep 30, 2026, 11:48 AM UTC.