M1.8 earthquake 12 km NE of Hydesville, California

Magnitude

1.8 (Md, duration), micro

Magnitude from

Northern California Seismic System

Local time

Mon, Sep 19, 1977, 5:33 PM PDT

UTC

1977-09-20 00:33:02 UTC

Depth

19.1 km (11.9 mi), shallow

Epicenter

40.636° N, 124.003° W

Region

California

Tsunami flag

No

Status

Reviewed by a seismologist

Location uncertainty

About 0.4 km horizontally, 0.7 km in depth

Depth from

From location

Station coverage gap

62°

Stations used

12

• Hydesville, CaliforniaPopulation 1,237. Forecast13 kmNE
• Fortuna, CaliforniaPopulation 12,000. Forecast14 kmENE
• Chico, CaliforniaPopulation 121,345. Forecast210 kmWNW
• Los Angeles, CaliforniaPopulation 3,820,914. Forecast891 kmNNW

After

1. 2.544 km WNW of Ferndale, CaliforniaMon, Sep 19, 9:39 PM PDT · 17909 days ago · 19 km deep · 65 km away
2. 2.155 km W of Ferndale, CaliforniaTue, Sep 20, 5:01 AM PDT · 17908 days ago · 20 km deep · 77 km away
3. 1.815 km SW of Willow Creek, CaliforniaTue, Sep 20, 2:26 PM PDT · 17908 days ago · 30 km deep · 30 km away
4. 1.967 km W of Ferndale, CaliforniaTue, Sep 20, 10:34 PM PDT · 17908 days ago · 7 km deep · 90 km away
5. 1.749 km W of Ferndale, CaliforniaWed, Sep 21, 2:59 PM PDT · 17907 days ago · 4 km deep · 71 km away
6. 1.614 km WNW of Fields Landing, CaliforniaWed, Sep 21, 5:20 PM PDT · 17907 days ago · 21 km deep · 35 km away
7. 1.99 km WSW of Mad River, CaliforniaThu, Sep 22, 2:46 AM PDT · 17907 days ago · 27 km deep · 41 km away
8. 1.613 km NW of Mad River, CaliforniaFri, Sep 23, 7:59 PM PDT · 17905 days ago · 24 km deep · 33 km away
9. 1.669 km WSW of Ferndale, CaliforniaSat, Sep 24, 5:08 AM PDT · 17904 days ago · 15 km deep · 93 km away
10. 1.510 km ESE of Pine Hills, CaliforniaMon, Sep 26, 7:14 AM PDT · 17902 days ago · 22 km deep · 7 km away
11. 1.816 km NE of Miranda, CaliforniaThu, Sep 29, 8:20 PM PDT · 17899 days ago · 19 km deep · 41 km away
12. 1.816 km S of Ferndale, CaliforniaFri, Sep 30, 3:04 PM PDT · 17898 days ago · 17 km deep · 33 km away
13. 1.712 km ENE of Blue Lake, CaliforniaSat, Oct 1, 12:01 AM PDT · 17898 days ago · -1 km deep · 36 km away
14. 1.714 km WNW of Fields Landing, CaliforniaSat, Oct 1, 9:09 AM PDT · 17897 days ago · 24 km deep · 34 km away
15. 1.98 km NNW of Willow Creek, CaliforniaSat, Oct 1, 9:37 PM PDT · 17897 days ago · 18 km deep · 51 km away
16. 1.822 km SSW of Ferndale, CaliforniaSat, Oct 1, 9:47 PM PDT · 17897 days ago · 27 km deep · 43 km away
17. 1.745 km W of Ferndale, CaliforniaSat, Oct 1, 10:52 PM PDT · 17897 days ago · 21 km deep · 67 km away
18. 2.145 km SW of Ferndale, CaliforniaSun, Oct 2, 7:24 AM PDT · 17896 days ago · 10 km deep · 66 km away
19. 1.522 km WSW of Weott, CaliforniaSun, Oct 2, 9:43 AM PDT · 17896 days ago · 6 km deep · 47 km away
20. 1.527 km SW of Scotia, CaliforniaSun, Oct 2, 6:08 PM PDT · 17896 days ago · 3 km deep · 46 km away
21. 1.912 km WNW of Fields Landing, CaliforniaSun, Oct 2, 10:47 PM PDT · 17896 days ago · 25 km deep · 33 km away
22. 1.812 km WNW of Fields Landing, CaliforniaSun, Oct 2, 11:34 PM PDT · 17896 days ago · 24 km deep · 33 km away
23. 1.99 km NW of Fields Landing, CaliforniaTue, Oct 4, 12:08 AM PDT · 17895 days ago · 23 km deep · 30 km away
24. 1.616 km WSW of Ferndale, CaliforniaThu, Oct 6, 5:47 AM PDT · 17892 days ago · 22 km deep · 39 km away
25. 2.316 km S of Ferndale, CaliforniaFri, Oct 7, 6:49 AM PDT · 17891 days ago · 19 km deep · 34 km away
26. 1.517 km WSW of Scotia, CaliforniaSat, Oct 8, 10:25 AM PDT · 17890 days ago · 20 km deep · 35 km away
27. 2.028 km W of Ferndale, CaliforniaSat, Oct 8, 12:20 PM PDT · 17890 days ago · 18 km deep · 51 km away
28. 2.142 km W of Ferndale, CaliforniaSun, Oct 9, 3:35 AM PDT · 17889 days ago · 25 km deep · 64 km away
29. 1.527 km SW of Ferndale, CaliforniaSun, Oct 9, 8:48 PM PDT · 17889 days ago · 23 km deep · 48 km away
30. 3.574 km W of Ferndale, CaliforniaSun, Oct 9, 9:04 PM PDT · 17889 days ago · 6 km deep · 98 km away
31. 2.48 km E of Benbow, CaliforniaMon, Oct 10, 6:26 PM PDT · 17888 days ago · 16 km deep · 70 km away
32. 2.3near the coast of Northern CaliforniaThu, Oct 13, 9:27 AM PDT · 17885 days ago · 21 km deep · 54 km away
33. 1.930 km W of Indianola, CaliforniaFri, Oct 14, 2:28 AM PDT · 17885 days ago · 23 km deep · 50 km away
34. 2.42 km WSW of Loleta, CaliforniaFri, Oct 14, 6:22 AM PDT · 17884 days ago · 19 km deep · 22 km away
35. 2.033 km SW of Ferndale, CaliforniaFri, Oct 14, 4:54 PM PDT · 17884 days ago · 28 km deep · 55 km away
36. 3.033 km SW of Ferndale, CaliforniaSat, Oct 15, 8:42 AM PDT · 17883 days ago · 24 km deep · 56 km away
37. 1.64 km N of Fortuna, CaliforniaSun, Oct 16, 7:47 AM PDT · 17882 days ago · 21 km deep · 13 km away
38. 1.60 km W of Redway, CaliforniaSun, Oct 16, 5:03 PM PDT · 17882 days ago · 21 km deep · 59 km away
39. 1.513 km SW of Ferndale, CaliforniaMon, Oct 17, 5:05 PM PDT · 17881 days ago · 21 km deep · 35 km away
40. 1.616 km SSW of Ferndale, CaliforniaWed, Oct 19, 12:43 PM PDT · 17879 days ago · 18 km deep · 36 km away
41. 2.119 km WNW of Mad River, CaliforniaWed, Oct 19, 11:00 PM PDT · 17879 days ago · 23 km deep · 28 km away
42. 3.237 km SW of Ferndale, CaliforniaFri, Oct 21, 12:00 AM PDT · 17878 days ago · 23 km deep · 57 km away
43. 1.69 km S of Ferndale, CaliforniaSat, Oct 22, 10:56 AM PDT · 17876 days ago · -1 km deep · 28 km away
44. 2.410 km N of Redcrest, CaliforniaSun, Oct 23, 1:19 PM PDT · 17875 days ago · 20 km deep · 16 km away
45. 2.028 km SW of Ferndale, CaliforniaWed, Oct 26, 9:51 PM PDT · 17872 days ago · 24 km deep · 51 km away
46. 2.329 km SW of Ferndale, CaliforniaThu, Oct 27, 12:46 AM PDT · 17872 days ago · 19 km deep · 51 km away
47. 3.175 km W of Ferndale, CaliforniaThu, Oct 27, 6:03 AM PDT · 17871 days ago · 4 km deep · 98 km away
48. 2.338 km SW of Ferndale, CaliforniaThu, Oct 27, 3:06 PM PDT · 17871 days ago · 19 km deep · 59 km away
49. 1.930 km WSW of Ferndale, CaliforniaFri, Oct 28, 12:53 PM PDT · 17870 days ago · 21 km deep · 54 km away
50. 1.612 km WNW of Ruth, CaliforniaSat, Oct 29, 7:44 PM PDT · 17869 days ago · 25 km deep · 58 km away
51. 2.077 km W of Samoa, CaliforniaMon, Oct 31, 10:02 AM PST · 17867 days ago · 6 km deep · 98 km away
52. 3.124 km SW of Scotia, CaliforniaWed, Nov 2, 6:55 PM PST · 17865 days ago · 22 km deep · 42 km away
53. 2.921 km WSW of Weott, CaliforniaThu, Nov 3, 4:59 AM PST · 17864 days ago · 5 km deep · 46 km away
54. 3.710 km SW of Scotia, CaliforniaThu, Nov 3, 6:55 PM PST · 17864 days ago · 4 km deep · 29 km away
55. 1.72 km NNE of Samoa, CaliforniaSun, Nov 6, 1:25 PM PST · 17861 days ago · 23 km deep · 27 km away
56. 1.622 km WNW of Hyampom, CaliforniaMon, Nov 7, 11:37 PM PST · 17860 days ago · 22 km deep · 26 km away
57. 3.065 km WSW of Ferndale, CaliforniaWed, Nov 9, 5:27 PM PST · 17858 days ago · 8 km deep · 88 km away
58. 2.827 km WSW of Ferndale, CaliforniaThu, Nov 10, 8:42 AM PST · 17857 days ago · 23 km deep · 50 km away
59. 1.928 km WSW of Ferndale, CaliforniaThu, Nov 10, 8:51 AM PST · 17857 days ago · 23 km deep · 51 km away
60. 2.867 km WSW of Ferndale, CaliforniaThu, Nov 10, 10:11 PM PST · 17857 days ago · 5 km deep · 90 km away

The first 60 of 70.

Before

1. 2.825 km SSW of Ferndale, CaliforniaMon, Sep 19, 12:20 AM PDT · 17910 days ago · 19 km deep · 44 km away
2. 1.630 km WSW of Ferndale, CaliforniaThu, Sep 15, 9:25 PM PDT · 17913 days ago · 26 km deep · 54 km away
3. 1.53 km SSE of Mad River, CaliforniaTue, Sep 13, 10:10 PM PDT · 17915 days ago · 0 km deep · 49 km away
4. 2.629 km SW of Ferndale, CaliforniaThu, Sep 8, 5:47 PM PDT · 17920 days ago · 24 km deep · 51 km away
5. 1.91 km WNW of Redway, CaliforniaThu, Sep 8, 12:19 PM PDT · 17920 days ago · 18 km deep · 58 km away
6. 1.644 km SW of Ferndale, CaliforniaThu, Sep 8, 9:21 AM PDT · 17920 days ago · 12 km deep · 66 km away
7. 1.77 km ESE of Redcrest, CaliforniaThu, Sep 8, 7:01 AM PDT · 17920 days ago · 25 km deep · 31 km away
8. 2.13 km E of Garberville, CaliforniaWed, Sep 7, 12:20 PM PDT · 17921 days ago · 1 km deep · 64 km away
9. 1.627 km WSW of Ferndale, CaliforniaWed, Sep 7, 2:26 AM PDT · 17922 days ago · 23 km deep · 51 km away
10. 2.218 km SW of Ferndale, CaliforniaTue, Sep 6, 3:38 AM PDT · 17922 days ago · 22 km deep · 40 km away
11. 1.952 km WNW of Indianola, CaliforniaMon, Sep 5, 1:19 PM PDT · 17923 days ago · 15 km deep · 73 km away
12. 1.966 km W of Ferndale, CaliforniaSat, Sep 3, 5:42 PM PDT · 17925 days ago · 4 km deep · 89 km away
13. 2.932 km SW of Ferndale, CaliforniaSat, Sep 3, 8:17 AM PDT · 17925 days ago · 17 km deep · 54 km away
14. 1.636 km WSW of Ferndale, CaliforniaThu, Sep 1, 7:58 PM PDT · 17927 days ago · 23 km deep · 59 km away
15. 1.722 km SW of Scotia, CaliforniaWed, Aug 31, 11:42 PM PDT · 17928 days ago · 25 km deep · 40 km away
16. 2.119 km WNW of Indianola, CaliforniaMon, Aug 29, 2:18 PM PDT · 17930 days ago · 24 km deep · 40 km away
17. 2.920 km W of Indianola, CaliforniaMon, Aug 29, 1:47 PM PDT · 17930 days ago · 23 km deep · 41 km away
18. 2.51 km NNW of Bayside, CaliforniaMon, Aug 29, 7:01 AM PDT · 17930 days ago · 25 km deep · 25 km away
19. 1.824 km SW of Ferndale, CaliforniaMon, Aug 29, 6:08 AM PDT · 17930 days ago · 21 km deep · 46 km away
20. 2.322 km NW of Mad River, CaliforniaSun, Aug 28, 10:26 PM PDT · 17931 days ago · 23 km deep · 24 km away

From the USGS Earthquake Hazards Program and its partner networks, event nc1036896. Read Thu, Oct 1, 2026, 9:39 PM UTC.