M1.8 earthquake 17 km ENE of Hydesville, California

Magnitude

1.8 (Md, duration), micro

Magnitude from

Northern California Seismic System

Local time

Sun, Sep 25, 1983, 6:11 PM PDT

UTC

1983-09-26 01:11:38 UTC

Depth

22.6 km (14.1 mi), shallow

Epicenter

40.615° N, 123.907° W

Region

California

Tsunami flag

No

Status

Reviewed by a seismologist

Location uncertainty

About 0.5 km horizontally, 0.7 km in depth

Magnitude uncertainty

±0.17

Depth from

From location

Station coverage gap

72°

Stations used

21

• Hydesville, CaliforniaPopulation 1,237. Forecast18 kmENE
• Fortuna, CaliforniaPopulation 12,000. Forecast21 kmE
• Chico, CaliforniaPopulation 121,345. Forecast202 kmWNW
• Los Angeles, CaliforniaPopulation 3,820,914. Forecast885 kmNNW

After

1. 2.847 km WSW of Ferndale, CaliforniaSun, Sep 25, 6:57 PM PDT · 15714 days ago · 21 km deep · 76 km away
2. 2.050 km WSW of Ferndale, CaliforniaSun, Sep 25, 10:23 PM PDT · 15714 days ago · 18 km deep · 79 km away
3. 2.65 km ENE of Rio Dell, CaliforniaMon, Sep 26, 12:07 AM PDT · 15713 days ago · 20 km deep · 16 km away
4. 2.36 km SE of Hydesville, CaliforniaMon, Sep 26, 12:17 AM PDT · 15713 days ago · 19 km deep · 16 km away
5. 2.06 km ENE of Rio Dell, CaliforniaMon, Sep 26, 2:04 AM PDT · 15713 days ago · 20 km deep · 16 km away
6. 1.96 km ENE of Rio Dell, CaliforniaMon, Sep 26, 2:30 AM PDT · 15713 days ago · 19 km deep · 16 km away
7. 2.85 km ENE of Rio Dell, CaliforniaMon, Sep 26, 4:29 AM PDT · 15713 days ago · 20 km deep · 16 km away
8. 2.06 km ESE of Hydesville, CaliforniaMon, Sep 26, 4:37 AM PDT · 15713 days ago · 19 km deep · 15 km away
9. 1.85 km W of Scotia, CaliforniaMon, Sep 26, 6:59 AM PDT · 15713 days ago · 8 km deep · 26 km away
10. 1.925 km W of Ferndale, CaliforniaMon, Sep 26, 9:09 AM PDT · 15713 days ago · 23 km deep · 56 km away
11. 1.641 km SW of Ferndale, CaliforniaMon, Sep 26, 9:28 PM PDT · 15713 days ago · 25 km deep · 69 km away
12. 3.539 km SW of Ferndale, CaliforniaMon, Sep 26, 9:28 PM PDT · 15713 days ago · 26 km deep · 66 km away
13. 3.641 km SW of Ferndale, CaliforniaMon, Sep 26, 9:30 PM PDT · 15713 days ago · 22 km deep · 68 km away
14. 1.613 km ENE of Redcrest, CaliforniaTue, Sep 27, 2:40 AM PDT · 15712 days ago · 21 km deep · 20 km away
15. 2.08 km NE of Trinity Village, CaliforniaTue, Sep 27, 2:52 PM PDT · 15712 days ago · 19 km deep · 52 km away
16. 1.9near the coast of Northern CaliforniaTue, Sep 27, 4:34 PM PDT · 15712 days ago · 13 km deep · 48 km away
17. 1.639 km SW of Ferndale, CaliforniaTue, Sep 27, 6:35 PM PDT · 15712 days ago · 12 km deep · 64 km away
18. 2.51 km SW of Mad River, CaliforniaWed, Sep 28, 2:06 PM PDT · 15711 days ago · -1 km deep · 38 km away
19. 2.617 km SW of Scotia, CaliforniaWed, Sep 28, 5:26 PM PDT · 15711 days ago · 29 km deep · 40 km away
20. 3.552 km W of Indianola, CaliforniaThu, Sep 29, 4:58 AM PDT · 15710 days ago · 15 km deep · 80 km away
21. 2.030 km WSW of Ferndale, CaliforniaFri, Sep 30, 1:04 AM PDT · 15709 days ago · 22 km deep · 61 km away
22. 2.521 km WSW of Weott, CaliforniaFri, Sep 30, 4:12 PM PDT · 15709 days ago · 8 km deep · 46 km away
23. 2.61 km SW of Fortuna, CaliforniaSat, Oct 1, 9:11 AM PDT · 15708 days ago · 6 km deep · 23 km away
24. 2.837 km SW of Ferndale, CaliforniaSat, Oct 1, 10:27 PM PDT · 15708 days ago · 22 km deep · 64 km away
25. 2.132 km SSW of Ferndale, CaliforniaSun, Oct 2, 9:15 AM PDT · 15707 days ago · 20 km deep · 56 km away
26. 2.06 km ENE of Rio Dell, CaliforniaMon, Oct 3, 8:42 PM PDT · 15706 days ago · 18 km deep · 16 km away
27. 1.610 km N of Covelo, CaliforniaThu, Oct 6, 2:39 AM PDT · 15703 days ago · 6 km deep · 99 km away
28. 1.916 km NE of Myers Flat, CaliforniaThu, Oct 6, 10:42 PM PDT · 15703 days ago · 4 km deep · 30 km away
29. 1.539 km SW of Ferndale, CaliforniaFri, Oct 7, 10:29 AM PDT · 15702 days ago · 20 km deep · 65 km away
30. 1.912 km W of Junction City, CaliforniaSat, Oct 8, 6:05 PM PDT · 15701 days ago · 12 km deep · 61 km away
31. 3.045 km SW of Ferndale, CaliforniaSun, Oct 9, 9:40 PM PDT · 15700 days ago · 19 km deep · 72 km away
32. 3.861 km WNW of Ferndale, CaliforniaMon, Oct 10, 5:43 AM PDT · 15699 days ago · 5 km deep · 90 km away
33. 3.04 km SE of Ferndale, CaliforniaMon, Oct 10, 8:48 AM PDT · 15699 days ago · 26 km deep · 27 km away
34. 1.812 km SSW of Scotia, CaliforniaMon, Oct 10, 4:40 PM PDT · 15699 days ago · 30 km deep · 33 km away
35. 1.513 km WNW of Covelo, CaliforniaMon, Oct 10, 10:09 PM PDT · 15699 days ago · 6 km deep · 97 km away
36. 1.613 km WNW of Covelo, CaliforniaTue, Oct 11, 12:14 AM PDT · 15698 days ago · 5 km deep · 97 km away
37. 2.121 km SSW of Ferndale, CaliforniaTue, Oct 11, 8:14 PM PDT · 15698 days ago · 28 km deep · 45 km away
38. 1.939 km SW of Ferndale, CaliforniaWed, Oct 12, 11:24 AM PDT · 15697 days ago · 18 km deep · 66 km away
39. 2.238 km SW of Ferndale, CaliforniaFri, Oct 14, 5:56 PM PDT · 15695 days ago · 19 km deep · 63 km away
40. 1.612 km NNW of Laytonville, CaliforniaSat, Oct 15, 1:09 PM PDT · 15694 days ago · 9 km deep · 97 km away
41. 1.625 km W of Ferndale, CaliforniaSat, Oct 15, 7:57 PM PDT · 15694 days ago · 18 km deep · 56 km away
42. 1.748 km SW of Ferndale, CaliforniaSun, Oct 16, 6:10 AM PDT · 15693 days ago · 31 km deep · 77 km away
43. 1.639 km SW of Ferndale, CaliforniaSun, Oct 16, 11:37 PM PDT · 15692 days ago · 18 km deep · 65 km away
44. 1.518 km WSW of Weott, CaliforniaMon, Oct 17, 7:07 AM PDT · 15692 days ago · 21 km deep · 45 km away
45. 1.730 km SW of Scotia, CaliforniaMon, Oct 17, 3:55 PM PDT · 15692 days ago · 22 km deep · 52 km away
46. 1.711 km SSW of Willow Creek, CaliforniaTue, Oct 18, 2:51 PM PDT · 15691 days ago · 28 km deep · 32 km away
47. 1.628 km SW of Scotia, CaliforniaTue, Oct 18, 3:53 PM PDT · 15691 days ago · 7 km deep · 51 km away
48. 1.532 km SW of Scotia, CaliforniaTue, Oct 18, 7:37 PM PDT · 15691 days ago · 23 km deep · 54 km away
49. 2.635 km SW of Ferndale, CaliforniaWed, Oct 19, 3:10 PM PDT · 15690 days ago · 17 km deep · 60 km away
50. 1.526 km WSW of Ferndale, CaliforniaThu, Oct 20, 2:25 AM PDT · 15689 days ago · 17 km deep · 56 km away
51. 1.958 km WSW of Ferndale, CaliforniaThu, Oct 20, 12:47 PM PDT · 15689 days ago · 20 km deep · 88 km away
52. 1.829 km SW of Ferndale, CaliforniaThu, Oct 20, 5:45 PM PDT · 15689 days ago · 17 km deep · 56 km away
53. 1.73 km SW of Scotia, CaliforniaSat, Oct 22, 2:56 AM PDT · 15687 days ago · 9 km deep · 25 km away
54. 1.58 km SSW of Ferndale, CaliforniaSun, Oct 23, 12:08 PM PDT · 15686 days ago · 20 km deep · 35 km away
55. 1.814 km NE of Redcrest, CaliforniaMon, Oct 24, 10:03 PM PDT · 15685 days ago · 73 km deep · 15 km away
56. 1.814 km ESE of Burnt Ranch, CaliforniaMon, Oct 24, 10:32 PM PDT · 15685 days ago · 16 km deep · 53 km away
57. 1.668 km W of Ferndale, CaliforniaTue, Oct 25, 6:44 AM PDT · 15684 days ago · 34 km deep · 98 km away
58. 2.212 km W of Ferndale, CaliforniaThu, Oct 27, 5:15 AM PDT · 15682 days ago · 22 km deep · 43 km away
59. 1.59 km S of Ferndale, CaliforniaThu, Oct 27, 10:29 AM PDT · 15682 days ago · 2 km deep · 35 km away
60. 1.99 km SSW of Ferndale, CaliforniaThu, Oct 27, 11:00 AM PDT · 15682 days ago · 3 km deep · 35 km away

The first 60 of 93.

Before

1. 2.833 km WSW of Ferndale, CaliforniaSun, Sep 25, 6:02 PM PDT · 15714 days ago · 29 km deep · 64 km away
2. 1.95 km WSW of Indianola, CaliforniaSun, Sep 25, 2:51 AM PDT · 15714 days ago · 5 km deep · 33 km away
3. 2.03 km SW of Loleta, CaliforniaSat, Sep 24, 6:30 PM PDT · 15715 days ago · 18 km deep · 29 km away
4. 1.836 km SW of Ferndale, CaliforniaFri, Sep 23, 4:36 PM PDT · 15716 days ago · 26 km deep · 65 km away
5. 2.08 km NE of Phillipsville, CaliforniaFri, Sep 23, 3:34 PM PDT · 15716 days ago · 25 km deep · 41 km away
6. 2.922 km SW of Ferndale, CaliforniaThu, Sep 22, 2:01 AM PDT · 15717 days ago · 21 km deep · 49 km away
7. 2.542 km SW of Ferndale, CaliforniaWed, Sep 21, 10:28 PM PDT · 15718 days ago · 19 km deep · 71 km away
8. 2.737 km SW of Ferndale, CaliforniaWed, Sep 21, 3:15 AM PDT · 15718 days ago · 19 km deep · 64 km away
9. 2.539 km SW of Ferndale, CaliforniaTue, Sep 20, 3:53 PM PDT · 15719 days ago · 22 km deep · 66 km away
10. 2.016 km N of Laytonville, CaliforniaMon, Sep 19, 3:39 PM PDT · 15720 days ago · 6 km deep · 94 km away
11. 2.821 km SW of Scotia, CaliforniaSat, Sep 17, 2:18 AM PDT · 15722 days ago · 33 km deep · 43 km away
12. 2.659 km WSW of Ferndale, CaliforniaFri, Sep 16, 7:51 PM PDT · 15723 days ago · 7 km deep · 89 km away
13. 2.644 km SW of Ferndale, CaliforniaFri, Sep 16, 6:21 PM PDT · 15723 days ago · 23 km deep · 73 km away
14. 2.335 km SW of Ferndale, CaliforniaFri, Sep 16, 9:32 AM PDT · 15723 days ago · 23 km deep · 62 km away
15. 2.51 km S of Mad River, CaliforniaThu, Sep 15, 10:44 PM PDT · 15724 days ago · 0 km deep · 39 km away
16. 2.14 km E of Indianola, CaliforniaThu, Sep 15, 8:38 PM PDT · 15724 days ago · 22 km deep · 25 km away
17. 1.722 km WSW of Weott, CaliforniaThu, Sep 15, 1:29 AM PDT · 15724 days ago · 8 km deep · 46 km away
18. 2.618 km NE of Willow Creek, CaliforniaWed, Sep 14, 2:34 PM PDT · 15725 days ago · 34 km deep · 61 km away
19. 1.942 km SW of Ferndale, CaliforniaWed, Sep 14, 2:22 PM PDT · 15725 days ago · 11 km deep · 71 km away
20. 2.211 km SSW of Ferndale, CaliforniaTue, Sep 13, 7:53 PM PDT · 15726 days ago · 26 km deep · 37 km away

From the USGS Earthquake Hazards Program and its partner networks, event nc1103627. Read Sat, Oct 3, 2026, 5:15 PM UTC.