M1.7 earthquake 12 km NNE of Redcrest, California

Magnitude

1.7 (Md, duration), micro

Magnitude from

Northern California Seismic System

Local time

Sun, Jul 31, 1983, 9:31 PM PDT

UTC

1983-08-01 04:31:33 UTC

Depth

17.5 km (10.9 mi), shallow

Epicenter

40.502° N, 123.888° W

Region

California

Tsunami flag

No

Status

Reviewed by a seismologist

Location uncertainty

About 0.6 km horizontally, 0.8 km in depth

Magnitude uncertainty

±0.02

Depth from

From location

Station coverage gap

92°

Stations used

7

• Scotia, CaliforniaPopulation 850. Forecast18 kmE
• Fortuna, CaliforniaPopulation 12,000. Forecast25 kmESE
• Chico, CaliforniaPopulation 121,345. Forecast194 kmWNW
• Los Angeles, CaliforniaPopulation 3,820,914. Forecast874 kmNNW

After

1. 1.917 km W of Ferndale, CaliforniaMon, Aug 1, 10:07 AM PDT · 15767 days ago · 24 km deep · 49 km away
2. 2.318 km WSW of Weott, CaliforniaMon, Aug 1, 10:18 AM PDT · 15767 days ago · 13 km deep · 35 km away
3. 1.725 km SW of Ferndale, CaliforniaTue, Aug 2, 1:09 PM PDT · 15766 days ago · 25 km deep · 51 km away
4. 1.613 km SW of Ferndale, CaliforniaTue, Aug 2, 4:56 PM PDT · 15765 days ago · 19 km deep · 41 km away
5. 2.230 km SSW of Ferndale, CaliforniaThu, Aug 4, 5:45 PM PDT · 15763 days ago · 19 km deep · 51 km away
6. 2.826 km W of Indianola, CaliforniaThu, Aug 4, 6:29 PM PDT · 15763 days ago · 22 km deep · 59 km away
7. 1.915 km SW of Ferndale, CaliforniaFri, Aug 5, 12:54 PM PDT · 15763 days ago · 19 km deep · 43 km away
8. 2.03 km SE of Benbow, CaliforniaSat, Aug 6, 3:05 AM PDT · 15762 days ago · 15 km deep · 52 km away
9. 1.929 km SW of Scotia, CaliforniaSat, Aug 6, 2:21 PM PDT · 15761 days ago · 21 km deep · 46 km away
10. 1.942 km W of Indianola, CaliforniaSat, Aug 6, 7:46 PM PDT · 15761 days ago · 10 km deep · 75 km away
11. 1.547 km SW of Ferndale, CaliforniaSat, Aug 6, 8:46 PM PDT · 15761 days ago · 13 km deep · 68 km away
12. 2.437 km SW of Ferndale, CaliforniaSun, Aug 7, 2:44 AM PDT · 15761 days ago · 22 km deep · 59 km away
13. 2.337 km SW of Ferndale, CaliforniaSun, Aug 7, 3:27 AM PDT · 15761 days ago · 22 km deep · 59 km away
14. 2.425 km SW of Ferndale, CaliforniaSun, Aug 7, 9:04 AM PDT · 15761 days ago · 21 km deep · 52 km away
15. 1.917 km E of Burnt Ranch, CaliforniaSun, Aug 7, 4:36 PM PDT · 15760 days ago · 13 km deep · 64 km away
16. 1.811 km W of Hyampom, CaliforniaTue, Aug 9, 4:11 AM PDT · 15759 days ago · 32 km deep · 29 km away
17. 1.62 km NW of Fields Landing, CaliforniaTue, Aug 9, 6:55 PM PDT · 15758 days ago · 19 km deep · 39 km away
18. 1.620 km SW of Scotia, CaliforniaWed, Aug 10, 1:23 AM PDT · 15758 days ago · 10 km deep · 35 km away
19. 1.56 km WSW of Scotia, CaliforniaWed, Aug 10, 3:29 PM PDT · 15757 days ago · 9 km deep · 24 km away
20. 1.831 km SW of Ferndale, CaliforniaThu, Aug 11, 3:14 AM PDT · 15757 days ago · 23 km deep · 58 km away
21. 1.923 km WSW of Ferndale, CaliforniaThu, Aug 11, 9:20 AM PDT · 15757 days ago · 24 km deep · 52 km away
22. 1.613 km SSW of Scotia, CaliforniaThu, Aug 11, 1:03 PM PDT · 15757 days ago · 30 km deep · 26 km away
23. 3.159 km W of Ferndale, CaliforniaFri, Aug 12, 1:30 AM PDT · 15756 days ago · 5 km deep · 90 km away
24. 1.642 km SW of Ferndale, CaliforniaFri, Aug 12, 4:54 AM PDT · 15756 days ago · 21 km deep · 66 km away
25. 1.530 km SW of Scotia, CaliforniaFri, Aug 12, 6:00 AM PDT · 15756 days ago · 22 km deep · 47 km away
26. 2.820 km SW of Ferndale, CaliforniaFri, Aug 12, 7:11 PM PDT · 15755 days ago · 16 km deep · 45 km away
27. 2.06 km ENE of Rio Dell, CaliforniaSat, Aug 13, 1:53 PM PDT · 15755 days ago · 18 km deep · 12 km away
28. 1.66 km E of Rio Dell, CaliforniaSat, Aug 13, 3:21 PM PDT · 15754 days ago · 19 km deep · 12 km away
29. 1.730 km NW of Shelter Cove, CaliforniaSat, Aug 13, 7:10 PM PDT · 15754 days ago · 4 km deep · 50 km away
30. 1.66 km ENE of Rio Dell, CaliforniaSat, Aug 13, 11:34 PM PDT · 15754 days ago · 19 km deep · 12 km away
31. 1.812 km WNW of Fields Landing, CaliforniaSun, Aug 14, 11:13 PM PDT · 15753 days ago · 24 km deep · 48 km away
32. 1.76 km E of Rio Dell, CaliforniaMon, Aug 15, 10:31 PM PDT · 15752 days ago · 20 km deep · 12 km away
33. 2.34 km ENE of Blue Lake, CaliforniaTue, Aug 16, 6:39 AM PDT · 15752 days ago · 3 km deep · 44 km away
34. 1.55 km E of Rio Dell, CaliforniaTue, Aug 16, 9:21 AM PDT · 15752 days ago · 22 km deep · 13 km away
35. 1.625 km WSW of Ferndale, CaliforniaTue, Aug 16, 1:33 PM PDT · 15752 days ago · 21 km deep · 55 km away
36. 1.99 km SW of Hyampom, CaliforniaWed, Aug 17, 12:28 AM PDT · 15751 days ago · 24 km deep · 31 km away
37. 2.631 km SW of Ferndale, CaliforniaWed, Aug 17, 8:06 AM PDT · 15751 days ago · 22 km deep · 56 km away
38. 1.921 km W of Indianola, CaliforniaWed, Aug 17, 10:24 PM PDT · 15750 days ago · 21 km deep · 55 km away
39. 2.922 km SSW of Ferndale, CaliforniaFri, Aug 19, 12:21 AM PDT · 15749 days ago · 20 km deep · 41 km away
40. 2.310 km NW of Ruth, CaliforniaFri, Aug 19, 5:09 AM PDT · 15749 days ago · 21 km deep · 44 km away
41. 1.718 km ESE of Indianola, CaliforniaFri, Aug 19, 9:54 PM PDT · 15748 days ago · 24 km deep · 25 km away
42. 2.622 km W of Indianola, CaliforniaTue, Aug 23, 3:21 AM PDT · 15745 days ago · 23 km deep · 56 km away
43. 1.65 km ESE of Hydesville, CaliforniaTue, Aug 23, 9:40 PM PDT · 15744 days ago · 4 km deep · 13 km away
44. 1.917 km ENE of Hydesville, CaliforniaWed, Aug 24, 1:03 AM PDT · 15744 days ago · 20 km deep · 10 km away
45. 5.560 km WSW of Ferndale, CaliforniaWed, Aug 24, 6:36 AM PDT · 15744 days ago · 11 km deep · 89 km away
46. 2.430 km SSW of Ferndale, CaliforniaWed, Aug 24, 6:43 AM PDT · 15744 days ago · 24 km deep · 51 km away
47. 1.727 km SW of Scotia, CaliforniaWed, Aug 24, 6:44 AM PDT · 15744 days ago · 11 km deep · 43 km away
48. 2.17 km WSW of Scotia, CaliforniaWed, Aug 24, 6:45 AM PDT · 15744 days ago · 27 km deep · 25 km away
49. 2.031 km SW of Ferndale, CaliforniaWed, Aug 24, 6:45 AM PDT · 15744 days ago · 20 km deep · 57 km away
50. 1.922 km SSW of Ferndale, CaliforniaWed, Aug 24, 6:48 AM PDT · 15744 days ago · 20 km deep · 45 km away
51. 2.640 km SW of Ferndale, CaliforniaWed, Aug 24, 6:48 AM PDT · 15744 days ago · 11 km deep · 64 km away
52. 1.934 km SSW of Ferndale, CaliforniaWed, Aug 24, 6:49 AM PDT · 15744 days ago · 20 km deep · 50 km away
53. 2.134 km SSW of Ferndale, CaliforniaWed, Aug 24, 6:49 AM PDT · 15744 days ago · 12 km deep · 54 km away
54. 2.240 km SW of Ferndale, CaliforniaWed, Aug 24, 6:52 AM PDT · 15744 days ago · 26 km deep · 66 km away
55. 3.653 km WSW of Ferndale, CaliforniaWed, Aug 24, 6:53 AM PDT · 15744 days ago · 22 km deep · 81 km away
56. 2.251 km WSW of Ferndale, CaliforniaWed, Aug 24, 6:56 AM PDT · 15744 days ago · 28 km deep · 78 km away
57. 2.342 km SW of Ferndale, CaliforniaWed, Aug 24, 6:57 AM PDT · 15744 days ago · 12 km deep · 61 km away
58. 2.434 km SW of Scotia, CaliforniaWed, Aug 24, 6:57 AM PDT · 15744 days ago · 26 km deep · 51 km away
59. 1.915 km SSW of Ferndale, CaliforniaWed, Aug 24, 6:58 AM PDT · 15744 days ago · 23 km deep · 36 km away
60. 2.841 km SW of Ferndale, CaliforniaWed, Aug 24, 6:59 AM PDT · 15744 days ago · 20 km deep · 65 km away

The first 60 of at least 199.

Before

1. 1.743 km W of Ferndale, CaliforniaSun, Jul 31, 1:14 AM PDT · 15768 days ago · 4 km deep · 75 km away
2. 1.512 km SW of Scotia, CaliforniaSun, Jul 31, 12:56 AM PDT · 15768 days ago · 7 km deep · 30 km away
3. 1.930 km WSW of Ferndale, CaliforniaSat, Jul 30, 7:20 PM PDT · 15768 days ago · 20 km deep · 61 km away
4. 1.717 km SW of Ferndale, CaliforniaFri, Jul 29, 5:03 PM PDT · 15769 days ago · 26 km deep · 44 km away
5. 1.624 km SW of Ferndale, CaliforniaFri, Jul 29, 5:16 AM PDT · 15770 days ago · 19 km deep · 52 km away
6. 3.117 km WSW of Ferndale, CaliforniaFri, Jul 29, 3:56 AM PDT · 15770 days ago · 17 km deep · 48 km away
7. 2.935 km WNW of Trinidad, CaliforniaFri, Jul 29, 2:42 AM PDT · 15770 days ago · 21 km deep · 89 km away
8. 2.617 km WSW of Trinidad, CaliforniaFri, Jul 29, 2:10 AM PDT · 15770 days ago · 18 km deep · 68 km away
9. 2.015 km SW of Scotia, CaliforniaWed, Jul 27, 1:11 PM PDT · 15772 days ago · 34 km deep · 31 km away
10. 3.228 km WNW of Samoa, CaliforniaWed, Jul 27, 8:57 AM PDT · 15772 days ago · 24 km deep · 68 km away
11. 2.08 km ESE of Leggett, CaliforniaWed, Jul 27, 5:08 AM PDT · 15772 days ago · 2 km deep · 79 km away
12. 2.010 km ESE of Leggett, CaliforniaWed, Jul 27, 3:13 AM PDT · 15772 days ago · 5 km deep · 80 km away
13. 3.027 km SSW of Ferndale, CaliforniaWed, Jul 27, 1:10 AM PDT · 15772 days ago · 18 km deep · 48 km away
14. 2.25 km NW of Laytonville, CaliforniaTue, Jul 26, 8:36 PM PDT · 15772 days ago · 8 km deep · 92 km away
15. 2.646 km SW of Ferndale, CaliforniaTue, Jul 26, 3:21 PM PDT · 15772 days ago · 17 km deep · 72 km away
16. 1.931 km SW of Ferndale, CaliforniaMon, Jul 25, 5:01 PM PDT · 15773 days ago · 22 km deep · 55 km away
17. 2.035 km SW of Scotia, CaliforniaMon, Jul 25, 3:59 AM PDT · 15774 days ago · 23 km deep · 51 km away
18. 1.626 km W of Indianola, CaliforniaSun, Jul 24, 5:13 PM PDT · 15774 days ago · 21 km deep · 59 km away
19. 2.522 km W of Indianola, CaliforniaSun, Jul 24, 5:11 PM PDT · 15774 days ago · 20 km deep · 56 km away
20. 2.517 km SW of Willow Creek, CaliforniaSun, Jul 24, 12:43 AM PDT · 15775 days ago · 25 km deep · 39 km away

From the USGS Earthquake Hazards Program and its partner networks, event nc1099646. Read Thu, Oct 1, 2026, 8:40 AM UTC.