M1.8 earthquake 54 km W of Ferndale, California

Magnitude

1.8 (md), micro

Local time

Tue, Dec 20, 1983, 2:49 AM PST

UTC

1983-12-20 10:49:28 UTC

Depth

6.5 km (4.0 mi), shallow

Epicenter

40.525° N, 124.904° W

Region

California

Tsunami flag

No

Status

Reviewed by a seismologist

Location uncertainty

About 4.3 km horizontally, 3.0 km in depth

Magnitude uncertainty

±0.14

Depth from

From location

Station coverage gap

300°, poorly surrounded by stations

Stations used

16

• Ferndale, CaliforniaPopulation 1,369. Forecast54 kmW
• Fortuna, CaliforniaPopulation 12,000. Forecast64 kmW
• Chico, CaliforniaPopulation 121,345. Forecast275 kmWNW

After

1. 1.734 km SW of Ferndale, CaliforniaTue, Dec 20, 3:06 AM PST · 15617 days ago · 21 km deep · 32 km away
2. 1.9129 km W of Ferndale, CaliforniaTue, Dec 20, 4:03 PM PST · 15617 days ago · 4 km deep · 75 km away
3. 3.774 km WSW of Ferndale, CaliforniaTue, Dec 20, 11:39 PM PST · 15617 days ago · 1 km deep · 22 km away
4. 3.698 km W of Ferndale, CaliforniaWed, Dec 21, 11:15 AM PST · 15616 days ago · 5 km deep · 45 km away
5. 3.036 km SW of Ferndale, CaliforniaWed, Dec 21, 1:20 PM PST · 15616 days ago · 24 km deep · 41 km away
6. 3.2106 km W of Ferndale, CaliforniaThu, Dec 22, 8:39 AM PST · 15615 days ago · 47 km deep · 52 km away
7. 1.529 km SW of Scotia, CaliforniaThu, Dec 22, 6:20 PM PST · 15615 days ago · 15 km deep · 50 km away
8. 2.426 km SW of Scotia, CaliforniaThu, Dec 22, 7:01 PM PST · 15615 days ago · 17 km deep · 52 km away
9. 2.045 km SW of Ferndale, CaliforniaThu, Dec 22, 11:30 PM PST · 15615 days ago · 16 km deep · 32 km away
10. 2.436 km SSW of Ferndale, CaliforniaFri, Dec 23, 1:03 PM PST · 15614 days ago · 24 km deep · 42 km away
11. 1.58 km S of Ferndale, CaliforniaFri, Dec 23, 10:30 PM PST · 15614 days ago · 22 km deep · 53 km away
12. 1.916 km ENE of Redcrest, CaliforniaSat, Dec 24, 2:30 AM PST · 15614 days ago · 21 km deep · 96 km away
13. 2.867 km W of Ferndale, CaliforniaSat, Dec 24, 6:27 AM PST · 15613 days ago · 4 km deep · 13 km away
14. 1.717 km SSW of Ferndale, CaliforniaSun, Dec 25, 11:39 PM PST · 15612 days ago · 21 km deep · 51 km away
15. 2.2106 km W of Ferndale, CaliforniaMon, Dec 26, 7:48 AM PST · 15611 days ago · 4 km deep · 52 km away
16. 3.315 km W of Ferndale, CaliforniaTue, Dec 27, 2:35 AM PST · 15611 days ago · 20 km deep · 39 km away
17. 2.819 km WSW of Ferndale, CaliforniaTue, Dec 27, 8:17 PM PST · 15610 days ago · 23 km deep · 37 km away
18. 2.090 km WSW of Ferndale, CaliforniaTue, Dec 27, 9:33 PM PST · 15610 days ago · 4 km deep · 36 km away
19. 2.530 km SW of Scotia, CaliforniaWed, Dec 28, 1:32 PM PST · 15609 days ago · 13 km deep · 52 km away
20. 1.621 km NE of Redcrest, CaliforniaSat, Dec 31, 2:31 AM PST · 15607 days ago · 6 km deep · 97 km away
21. 1.8near the coast of Northern CaliforniaSat, Dec 31, 1:12 PM PST · 15606 days ago · 6 km deep · 50 km away
22. 2.024 km W of Ferndale, CaliforniaSat, Dec 31, 7:08 PM PST · 15606 days ago · 21 km deep · 31 km away
23. 2.731 km SW of Scotia, CaliforniaSun, Jan 1, 7:10 AM PST · 15605 days ago · 27 km deep · 51 km away
24. 3.026 km SW of Scotia, CaliforniaTue, Jan 3, 9:40 PM PST · 15603 days ago · 19 km deep · 51 km away
25. 2.13 km SSW of Scotia, CaliforniaThu, Jan 5, 6:54 AM PST · 15601 days ago · 5 km deep · 67 km away
26. 1.538 km SW of Ferndale, CaliforniaSat, Jan 7, 2:11 AM PST · 15600 days ago · 21 km deep · 40 km away
27. 2.888 km WSW of Ferndale, CaliforniaSat, Jan 7, 3:25 PM PST · 15599 days ago · 18 km deep · 35 km away
28. 2.35 km SW of Weott, CaliforniaSun, Jan 8, 12:42 PM PST · 15598 days ago · 4 km deep · 83 km away
29. 1.921 km WSW of Ferndale, CaliforniaTue, Jan 10, 4:53 PM PST · 15596 days ago · 23 km deep · 34 km away
30. 2.456 km WSW of Ferndale, CaliforniaWed, Jan 11, 7:32 AM PST · 15595 days ago · 40 km deep · 17 km away
31. 1.943 km WSW of Ferndale, CaliforniaFri, Jan 13, 3:31 AM PST · 15593 days ago · 13 km deep · 23 km away
32. 1.919 km WSW of Ferndale, CaliforniaFri, Jan 13, 11:17 AM PST · 15593 days ago · 21 km deep · 36 km away
33. 1.528 km WSW of Ferndale, CaliforniaFri, Jan 13, 11:24 AM PST · 15593 days ago · 21 km deep · 27 km away
34. 2.028 km SW of Ferndale, CaliforniaFri, Jan 13, 8:24 PM PST · 15593 days ago · 17 km deep · 34 km away
35. 2.03 km W of Scotia, CaliforniaFri, Jan 13, 8:59 PM PST · 15593 days ago · 18 km deep · 64 km away
36. 1.53 km WSW of Loleta, CaliforniaSat, Jan 14, 1:06 AM PST · 15593 days ago · 19 km deep · 56 km away
37. 4.025 km SSW of Scotia, CaliforniaSat, Jan 14, 2:37 AM PST · 15593 days ago · 10 km deep · 60 km away
38. 3.927 km SW of Scotia, CaliforniaSat, Jan 14, 2:39 AM PST · 15593 days ago · 10 km deep · 58 km away
39. 2.125 km SSW of Scotia, CaliforniaSat, Jan 14, 2:48 AM PST · 15593 days ago · 8 km deep · 61 km away
40. 3.027 km SW of Scotia, CaliforniaSat, Jan 14, 7:15 AM PST · 15592 days ago · 9 km deep · 59 km away
41. 3.197 km WSW of Ferndale, CaliforniaSun, Jan 15, 1:26 PM PST · 15591 days ago · 21 km deep · 43 km away
42. 3.568 km W of Indianola, CaliforniaMon, Jan 16, 7:41 PM PST · 15590 days ago · 21 km deep · 30 km away
43. 2.350 km SW of Ferndale, CaliforniaMon, Jan 16, 9:34 PM PST · 15590 days ago · 18 km deep · 32 km away
44. 3.217 km SW of Scotia, CaliforniaTue, Jan 17, 12:42 AM PST · 15590 days ago · 25 km deep · 60 km away
45. 1.518 km E of Redcrest, CaliforniaWed, Jan 18, 8:09 AM PST · 15588 days ago · 20 km deep · 100 km away
46. 1.735 km SSW of Ferndale, CaliforniaFri, Jan 20, 12:45 AM PST · 15587 days ago · 21 km deep · 47 km away
47. 2.440 km SW of Ferndale, CaliforniaFri, Jan 20, 1:19 AM PST · 15587 days ago · 20 km deep · 36 km away
48. 3.027 km SW of Ferndale, CaliforniaSat, Jan 21, 3:40 AM PST · 15585 days ago · 17 km deep · 40 km away
49. 2.319 km WNW of Indianola, CaliforniaSat, Jan 21, 3:18 PM PST · 15585 days ago · 23 km deep · 45 km away
50. 2.194 km WSW of Ferndale, CaliforniaMon, Jan 23, 9:46 PM PST · 15583 days ago · 4 km deep · 41 km away
51. 2.527 km SW of Ferndale, CaliforniaTue, Jan 24, 9:24 AM PST · 15582 days ago · 18 km deep · 40 km away
52. 2.727 km SW of Scotia, CaliforniaWed, Jan 25, 3:39 AM PST · 15581 days ago · 7 km deep · 59 km away
53. 3.025 km SW of Scotia, CaliforniaWed, Jan 25, 10:02 AM PST · 15581 days ago · 10 km deep · 59 km away
54. 2.136 km WNW of Ferndale, CaliforniaWed, Jan 25, 1:51 PM PST · 15581 days ago · 21 km deep · 24 km away
55. 2.794 km W of Ferndale, CaliforniaThu, Jan 26, 5:30 PM PST · 15580 days ago · 21 km deep · 40 km away
56. 2.669 km WSW of Ferndale, CaliforniaFri, Jan 27, 3:15 PM PST · 15579 days ago · 5 km deep · 21 km away
57. 1.628 km SW of Scotia, CaliforniaSat, Jan 28, 8:01 AM PST · 15578 days ago · 20 km deep · 55 km away
58. 1.762 km SW of Ferndale, CaliforniaSat, Jan 28, 9:31 PM PST · 15578 days ago · 5 km deep · 34 km away
59. 3.238 km W of Ferndale, CaliforniaMon, Jan 30, 12:15 PM PST · 15576 days ago · 19 km deep · 19 km away
60. 1.617 km SW of Ferndale, CaliforniaTue, Jan 31, 7:01 AM PST · 15575 days ago · 8 km deep · 44 km away

The first 60 of 78.

Before

1. 2.292 km W of Ferndale, CaliforniaTue, Dec 20, 2:48 AM PST · 15618 days ago · 2 km deep · 38 km away
2. 5.7118 km W of Ferndale, CaliforniaTue, Dec 20, 2:41 AM PST · 15618 days ago · 8 km deep · 64 km away
3. 2.65 km W of Weott, CaliforniaMon, Dec 19, 3:37 PM PST · 15618 days ago · 28 km deep · 81 km away
4. 1.966 km W of Ferndale, CaliforniaFri, Dec 16, 11:40 PM PST · 15621 days ago · 37 km deep · 15 km away
5. 1.843 km SW of Ferndale, CaliforniaFri, Dec 16, 11:17 PM PST · 15621 days ago · 17 km deep · 34 km away
6. 2.837 km SW of Ferndale, CaliforniaFri, Dec 16, 1:27 PM PST · 15621 days ago · 21 km deep · 39 km away
7. 2.5124 km W of Ferndale, CaliforniaMon, Dec 12, 10:10 AM PST · 15625 days ago · 5 km deep · 70 km away
8. 3.217 km ENE of Redcrest, CaliforniaSun, Dec 11, 10:14 AM PST · 15626 days ago · 23 km deep · 97 km away
9. 2.586 km WSW of Ferndale, CaliforniaFri, Dec 9, 5:13 AM PST · 15628 days ago · 22 km deep · 33 km away
10. 2.768 km W of Ferndale, CaliforniaTue, Dec 6, 8:51 PM PST · 15631 days ago · 5 km deep · 17 km away
11. 2.017 km N of Shelter Cove, CaliforniaSun, Dec 4, 11:22 PM PST · 15633 days ago · 19 km deep · 80 km away
12. 1.834 km SW of Ferndale, CaliforniaThu, Dec 1, 9:41 AM PST · 15636 days ago · 28 km deep · 32 km away
13. 2.013 km ENE of Fortuna, CaliforniaThu, Dec 1, 6:18 AM PST · 15636 days ago · 20 km deep · 76 km away
14. 3.027 km SW of Scotia, CaliforniaWed, Nov 30, 5:20 PM PST · 15637 days ago · 10 km deep · 57 km away
15. 2.939 km SW of Ferndale, CaliforniaWed, Nov 30, 2:17 PM PST · 15637 days ago · 21 km deep · 36 km away
16. 1.98 km SE of Blue Lake, CaliforniaWed, Nov 30, 2:07 PM PST · 15637 days ago · -1 km deep · 91 km away
17. 1.88 km WSW of Ferndale, CaliforniaTue, Nov 29, 5:37 PM PST · 15638 days ago · 21 km deep · 46 km away
18. 1.639 km WSW of Ferndale, CaliforniaTue, Nov 29, 8:33 AM PST · 15638 days ago · 23 km deep · 20 km away
19. 2.122 km WSW of Ferndale, CaliforniaTue, Nov 29, 6:52 AM PST · 15638 days ago · 22 km deep · 35 km away
20. 2.337 km SW of Ferndale, CaliforniaMon, Nov 28, 10:55 PM PST · 15639 days ago · 19 km deep · 40 km away

From the USGS Earthquake Hazards Program and its partner networks, event nc1108757. Read Tue, Sep 22, 2026, 10:34 PM UTC.