M2.8 earthquake 40 km W of Ferndale, California

Magnitude

2.8 (md), micro

Local time

Sat, Sep 27, 1975, 7:23 AM PDT

UTC

1975-09-27 14:23:37 UTC

Depth

23.8 km (14.8 mi), shallow

Epicenter

40.529° N, 124.740° W

Region

California

Tsunami flag

No

Status

Reviewed by a seismologist

Location uncertainty

About 5.9 km horizontally, 8.8 km in depth

Depth from

From location

Station coverage gap

308°, poorly surrounded by stations

Stations used

10

• Ferndale, CaliforniaPopulation 1,369. Forecast41 kmW
• Fortuna, CaliforniaPopulation 12,000. Forecast50 kmW
• Chico, CaliforniaPopulation 121,345. Forecast262 kmWNW

After

1. 2.841 km W of Ferndale, CaliforniaSat, Sep 27, 7:30 AM PDT · 18631 days ago · 24 km deep · 1 km away
2. 2.015 km WSW of Scotia, CaliforniaSat, Sep 27, 3:12 PM PDT · 18630 days ago · 27 km deep · 41 km away
3. 1.68 km NNW of Redcrest, CaliforniaSat, Sep 27, 3:13 PM PDT · 18630 days ago · 4 km deep · 65 km away
4. 2.010 km E of Fieldbrook, CaliforniaSun, Sep 28, 2:35 AM PDT · 18630 days ago · 23 km deep · 84 km away
5. 1.511 km NW of Mad River, CaliforniaSun, Sep 28, 4:48 AM PDT · 18630 days ago · 2 km deep · 95 km away
6. 1.514 km SW of Ferndale, CaliforniaSun, Sep 28, 5:57 AM PDT · 18630 days ago · 23 km deep · 31 km away
7. 1.64 km SE of Ferndale, CaliforniaSun, Sep 28, 2:19 PM PDT · 18629 days ago · 31 km deep · 43 km away
8. 3.545 km W of Ferndale, CaliforniaMon, Sep 29, 11:11 PM PDT · 18628 days ago · 50 km deep · 5 km away
9. 2.634 km WSW of Ferndale, CaliforniaTue, Sep 30, 3:38 AM PDT · 18628 days ago · 22 km deep · 8 km away
10. 1.730 km WSW of Ferndale, CaliforniaTue, Sep 30, 5:12 AM PDT · 18628 days ago · 23 km deep · 11 km away
11. 1.614 km WNW of Fields Landing, CaliforniaSat, Oct 4, 1:43 AM PDT · 18624 days ago · 27 km deep · 39 km away
12. 1.94 km WSW of Weott, CaliforniaSun, Oct 5, 11:25 AM PDT · 18622 days ago · 25 km deep · 69 km away
13. 1.8Northern CaliforniaMon, Oct 6, 4:13 PM PDT · 18621 days ago · 24 km deep · 70 km away
14. 2.333 km SW of Ferndale, CaliforniaMon, Oct 6, 8:52 PM PDT · 18621 days ago · 17 km deep · 28 km away
15. 1.5near the coast of Northern CaliforniaTue, Oct 7, 12:41 AM PDT · 18621 days ago · 25 km deep · 25 km away
16. 2.27 km E of Phillipsville, CaliforniaTue, Oct 7, 9:57 PM PDT · 18620 days ago · 34 km deep · 95 km away
17. 2.312 km ESE of Blue Lake, CaliforniaWed, Oct 8, 11:13 AM PDT · 18619 days ago · 27 km deep · 84 km away
18. 1.93 km E of Loleta, CaliforniaThu, Oct 9, 12:51 PM PDT · 18618 days ago · 24 km deep · 49 km away
19. 1.76 km ENE of Phillipsville, CaliforniaSat, Oct 11, 6:34 PM PDT · 18616 days ago · 28 km deep · 93 km away
20. 1.923 km SW of Ferndale, CaliforniaSun, Oct 12, 3:05 AM PDT · 18616 days ago · 21 km deep · 29 km away
21. 3.079 km WNW of Samoa, CaliforniaSun, Oct 12, 5:54 PM PDT · 18615 days ago · 11 km deep · 62 km away
22. 2.03 km N of Ferndale, CaliforniaMon, Oct 13, 5:19 PM PDT · 18614 days ago · 20 km deep · 41 km away
23. 1.68 km W of Rio Dell, CaliforniaTue, Oct 14, 1:05 PM PDT · 18613 days ago · 20 km deep · 45 km away
24. 1.66 km W of Rio Dell, CaliforniaTue, Oct 14, 10:22 PM PDT · 18613 days ago · 20 km deep · 47 km away
25. 2.544 km SW of Ferndale, CaliforniaWed, Oct 15, 10:23 AM PDT · 18613 days ago · 10 km deep · 30 km away
26. 2.524 km WNW of Samoa, CaliforniaWed, Oct 15, 11:01 PM PDT · 18612 days ago · 50 km deep · 46 km away
27. 1.58 km W of Rio Dell, CaliforniaSat, Oct 18, 2:15 PM PDT · 18609 days ago · 21 km deep · 45 km away
28. 2.175 km W of Ferndale, CaliforniaSat, Oct 18, 3:44 PM PDT · 18609 days ago · 5 km deep · 38 km away
29. 1.76 km SW of Ferndale, CaliforniaSun, Oct 19, 10:00 AM PDT · 18609 days ago · 25 km deep · 36 km away
30. 2.823 km WNW of Big Lagoon, CaliforniaSun, Oct 19, 10:11 AM PDT · 18609 days ago · 35 km deep · 89 km away
31. 1.827 km SW of Ferndale, CaliforniaMon, Oct 20, 8:14 AM PDT · 18608 days ago · 19 km deep · 30 km away
32. 1.8near the coast of Northern CaliforniaMon, Oct 20, 1:13 PM PDT · 18607 days ago · 20 km deep · 31 km away
33. 1.827 km WSW of Ferndale, CaliforniaMon, Oct 20, 8:30 PM PDT · 18607 days ago · 18 km deep · 14 km away
34. 1.928 km WSW of Ferndale, CaliforniaSat, Oct 25, 7:52 AM PDT · 18603 days ago · 26 km deep · 14 km away
35. 1.76 km NW of Alderpoint, CaliforniaSat, Oct 25, 5:29 PM PDT · 18602 days ago · 29 km deep · 98 km away
36. 1.631 km WSW of Ferndale, CaliforniaSun, Oct 26, 1:50 PM PST · 18601 days ago · 22 km deep · 10 km away
37. 1.81 km NW of Ferndale, CaliforniaSun, Oct 26, 11:47 PM PST · 18601 days ago · 20 km deep · 40 km away
38. 1.523 km WNW of Indianola, CaliforniaMon, Oct 27, 1:14 AM PST · 18601 days ago · 28 km deep · 31 km away
39. 1.613 km WSW of Redcrest, CaliforniaTue, Oct 28, 1:46 PM PST · 18599 days ago · -1 km deep · 59 km away
40. 2.328 km SW of Ferndale, CaliforniaTue, Oct 28, 3:45 PM PST · 18599 days ago · 28 km deep · 28 km away
41. 1.98 km SW of Trinidad, CaliforniaWed, Oct 29, 10:40 PM PST · 18598 days ago · 19 km deep · 69 km away
42. 1.927 km SW of Ferndale, CaliforniaThu, Oct 30, 1:55 PM PST · 18597 days ago · 19 km deep · 29 km away
43. 2.6near the coast of Northern CaliforniaThu, Oct 30, 2:21 PM PST · 18597 days ago · 19 km deep · 30 km away
44. 2.228 km SW of Ferndale, CaliforniaFri, Oct 31, 11:17 AM PST · 18596 days ago · 19 km deep · 29 km away
45. 3.332 km SW of Scotia, CaliforniaSat, Nov 1, 2:35 PM PST · 18595 days ago · 48 km deep · 40 km away
46. 1.932 km W of Ferndale, CaliforniaSun, Nov 2, 6:06 PM PST · 18594 days ago · 20 km deep · 13 km away
47. 3.32 km NE of Westhaven-Moonstone, CaliforniaSun, Nov 2, 8:24 PM PST · 18594 days ago · 21 km deep · 81 km away
48. 1.98 km W of Rio Dell, CaliforniaMon, Nov 3, 2:48 AM PST · 18594 days ago · 20 km deep · 46 km away
49. 1.913 km NE of Redcrest, CaliforniaMon, Nov 3, 3:26 PM PST · 18593 days ago · 23 km deep · 76 km away
50. 1.78 km W of Rio Dell, CaliforniaTue, Nov 4, 10:10 AM PST · 18592 days ago · 19 km deep · 45 km away
51. 1.636 km SW of Ferndale, CaliforniaWed, Nov 5, 6:28 PM PST · 18591 days ago · 35 km deep · 25 km away
52. 2.827 km SW of Ferndale, CaliforniaThu, Nov 6, 5:01 AM PST · 18591 days ago · 19 km deep · 30 km away
53. 1.828 km SW of Ferndale, CaliforniaThu, Nov 6, 5:06 AM PST · 18591 days ago · 19 km deep · 27 km away
54. 3.049 km W of Samoa, CaliforniaThu, Nov 6, 9:34 PM PST · 18590 days ago · 21 km deep · 40 km away
55. 1.923 km SW of Ferndale, CaliforniaSun, Nov 9, 6:28 AM PST · 18588 days ago · 20 km deep · 31 km away
56. 2.14 km NW of Alderpoint, CaliforniaMon, Nov 10, 10:38 PM PST · 18586 days ago · 33 km deep · 100 km away
57. 3.688 km WSW of Ferndale, CaliforniaTue, Nov 11, 11:00 PM PST · 18585 days ago · 33 km deep · 48 km away
58. 3.464 km WSW of Ferndale, CaliforniaTue, Nov 11, 11:01 PM PST · 18585 days ago · 7 km deep · 26 km away
59. 2.971 km WSW of Ferndale, CaliforniaTue, Nov 11, 11:38 PM PST · 18585 days ago · 12 km deep · 33 km away
60. 1.65 km NNE of Westhaven-Moonstone, CaliforniaThu, Nov 13, 1:50 AM PST · 18584 days ago · 20 km deep · 84 km away

The first 60 of 103.

Before

1. 3.268 km W of Ferndale, CaliforniaThu, Sep 25, 1:58 PM PDT · 18632 days ago · 4 km deep · 28 km away
2. 1.828 km SSW of Ferndale, CaliforniaWed, Sep 24, 9:54 PM PDT · 18633 days ago · 19 km deep · 34 km away
3. 2.430 km WSW of Ferndale, CaliforniaWed, Sep 24, 5:39 AM PDT · 18634 days ago · 24 km deep · 12 km away
4. 1.77 km WSW of Ferndale, CaliforniaTue, Sep 23, 10:04 AM PDT · 18635 days ago · 23 km deep · 33 km away
5. 2.8off the coast of Northern CaliforniaMon, Sep 22, 1:26 PM PDT · 18635 days ago · 4 km deep · 42 km away
6. 1.933 km SW of Ferndale, CaliforniaMon, Sep 22, 5:55 AM PDT · 18636 days ago · 20 km deep · 24 km away
7. 1.67 km W of Rio Dell, CaliforniaSun, Sep 21, 2:23 PM PDT · 18636 days ago · 19 km deep · 46 km away
8. 1.711 km WNW of Indianola, CaliforniaSun, Sep 21, 3:29 AM PDT · 18637 days ago · 23 km deep · 40 km away
9. 2.08 km W of Rio Dell, CaliforniaFri, Sep 19, 9:01 AM PDT · 18639 days ago · 20 km deep · 46 km away
10. 3.059 km W of Ferndale, CaliforniaThu, Sep 18, 11:38 PM PDT · 18639 days ago · 39 km deep · 22 km away
11. 2.812 km WSW of Scotia, CaliforniaWed, Sep 17, 5:24 PM PDT · 18640 days ago · 26 km deep · 45 km away
12. 1.9near the coast of Northern CaliforniaWed, Sep 17, 4:02 PM PDT · 18640 days ago · 21 km deep · 25 km away
13. 2.040 km SSW of Ferndale, CaliforniaTue, Sep 16, 1:57 PM PDT · 18641 days ago · 9 km deep · 36 km away
14. 3.017 km WNW of Indianola, CaliforniaTue, Sep 16, 1:43 PM PDT · 18641 days ago · 25 km deep · 35 km away
15. 2.516 km NE of Redcrest, CaliforniaTue, Sep 16, 7:53 AM PDT · 18642 days ago · 25 km deep · 77 km away
16. 2.535 km SSW of Ferndale, CaliforniaTue, Sep 16, 6:01 AM PDT · 18642 days ago · 11 km deep · 37 km away
17. 2.616 km NE of Redcrest, CaliforniaTue, Sep 16, 5:15 AM PDT · 18642 days ago · 26 km deep · 76 km away
18. 3.493 km W of Ferndale, CaliforniaMon, Sep 15, 7:11 PM PDT · 18642 days ago · 4 km deep · 55 km away
19. 2.0near the coast of Northern CaliforniaMon, Sep 15, 2:21 PM PDT · 18642 days ago · 16 km deep · 23 km away
20. 2.04 km WSW of Loleta, CaliforniaMon, Sep 15, 10:52 AM PDT · 18642 days ago · 19 km deep · 41 km away

From the USGS Earthquake Hazards Program and its partner networks, event nc1026621. Read Wed, Sep 30, 2026, 5:08 AM UTC.