M2.5 earthquake 7 km W of Ruth, California

Magnitude

2.5 (Md, duration), micro

Magnitude from

Northern California Seismic System

Local time

Thu, Sep 9, 1976, 5:35 AM PDT

UTC

1976-09-09 12:35:21 UTC

Depth

37.0 km (23.0 mi), shallow

Epicenter

40.263° N, 123.404° W

Region

California

Tsunami flag

No

Status

Reviewed by a seismologist

Location uncertainty

About 9.2 km horizontally, 3.2 km in depth

Depth from

From location

Station coverage gap

310°, poorly surrounded by stations

Stations used

7

• Miranda, CaliforniaPopulation 520. Forecast36 kmE
• Fortuna, CaliforniaPopulation 12,000. Forecast74 kmESE
• Chico, CaliforniaPopulation 121,345. Forecast146 kmWNW
• Los Angeles, CaliforniaPopulation 3,820,914. Forecast828 kmNNW

After

1. 2.520 km SE of Ruth, CaliforniaThu, Sep 9, 5:45 AM PDT · 18288 days ago · 38 km deep · 25 km away
2. 2.116 km SW of Mad River, CaliforniaThu, Sep 9, 8:44 AM PDT · 18288 days ago · 25 km deep · 21 km away
3. 1.613 km WSW of Scotia, CaliforniaThu, Sep 9, 10:21 PM PDT · 18287 days ago · 25 km deep · 74 km away
4. 1.63 km W of Phillipsville, CaliforniaFri, Sep 10, 3:04 AM PDT · 18287 days ago · -1 km deep · 36 km away
5. 2.36 km SSE of Pine Hills, CaliforniaFri, Sep 10, 12:19 PM PDT · 18286 days ago · 19 km deep · 76 km away
6. 2.133 km SSW of Ferndale, CaliforniaSat, Sep 11, 9:39 AM PDT · 18286 days ago · 23 km deep · 91 km away
7. 1.612 km ENE of Hydesville, CaliforniaSun, Sep 12, 3:09 AM PDT · 18285 days ago · 20 km deep · 60 km away
8. 1.60 km W of Fortuna, CaliforniaSun, Sep 12, 5:07 AM PDT · 18285 days ago · 19 km deep · 74 km away
9. 4.844 km SSW of Ferndale, CaliforniaMon, Sep 13, 9:08 AM PDT · 18284 days ago · 33 km deep · 95 km away
10. 4.035 km SW of Ferndale, CaliforniaMon, Sep 13, 9:09 AM PDT · 18284 days ago · 27 km deep · 94 km away
11. 2.528 km SSW of Ferndale, CaliforniaMon, Sep 13, 9:27 AM PDT · 18284 days ago · 23 km deep · 87 km away
12. 2.919 km SSW of Ferndale, CaliforniaMon, Sep 13, 9:55 AM PDT · 18284 days ago · 23 km deep · 83 km away
13. 1.629 km SW of Ferndale, CaliforniaMon, Sep 13, 9:59 AM PDT · 18284 days ago · 21 km deep · 94 km away
14. 1.525 km SSW of Ferndale, CaliforniaMon, Sep 13, 10:35 AM PDT · 18283 days ago · 23 km deep · 85 km away
15. 3.236 km SW of Ferndale, CaliforniaMon, Sep 13, 12:32 PM PDT · 18283 days ago · 28 km deep · 94 km away
16. 1.611 km S of Ferndale, CaliforniaMon, Sep 13, 1:37 PM PDT · 18283 days ago · 4 km deep · 75 km away
17. 2.034 km SW of Ferndale, CaliforniaTue, Sep 14, 5:30 AM PDT · 18283 days ago · 21 km deep · 94 km away
18. 1.933 km SSW of Ferndale, CaliforniaTue, Sep 14, 6:18 AM PDT · 18283 days ago · 23 km deep · 90 km away
19. 2.932 km SSW of Ferndale, CaliforniaWed, Sep 15, 8:36 AM PDT · 18282 days ago · 20 km deep · 88 km away
20. 3.432 km SW of Ferndale, CaliforniaWed, Sep 15, 4:52 PM PDT · 18281 days ago · 25 km deep · 92 km away
21. 1.724 km WSW of Scotia, CaliforniaWed, Sep 15, 5:17 PM PDT · 18281 days ago · 16 km deep · 80 km away
22. 1.732 km SW of Ferndale, CaliforniaThu, Sep 16, 2:43 AM PDT · 18281 days ago · 21 km deep · 94 km away
23. 3.032 km NNE of Potter Valley, CaliforniaFri, Sep 17, 4:09 AM PDT · 18280 days ago · 15 km deep · 87 km away
24. 2.89 km WSW of Rio Dell, CaliforniaSat, Sep 18, 3:57 PM PDT · 18278 days ago · 24 km deep · 73 km away
25. 1.91 km NW of Humboldt Hill, CaliforniaSat, Sep 18, 11:53 PM PDT · 18278 days ago · 9 km deep · 85 km away
26. 1.51 km NW of Humboldt Hill, CaliforniaSun, Sep 19, 2:45 PM PDT · 18277 days ago · 9 km deep · 86 km away
27. 3.00 km NW of Humboldt Hill, CaliforniaMon, Sep 20, 2:09 PM PDT · 18276 days ago · 10 km deep · 85 km away
28. 3.00 km NNW of Humboldt Hill, CaliforniaMon, Sep 20, 3:23 PM PDT · 18276 days ago · 10 km deep · 85 km away
29. 1.91 km WNW of Humboldt Hill, CaliforniaMon, Sep 20, 3:43 PM PDT · 18276 days ago · 0 km deep · 85 km away
30. 1.78 km WSW of Rio Dell, CaliforniaWed, Sep 22, 6:56 PM PDT · 18274 days ago · 21 km deep · 72 km away
31. 1.727 km SW of Ferndale, CaliforniaThu, Sep 23, 1:18 AM PDT · 18274 days ago · 21 km deep · 93 km away
32. 2.137 km SSW of Ferndale, CaliforniaThu, Sep 23, 3:41 PM PDT · 18273 days ago · 28 km deep · 93 km away
33. 1.58 km SSW of Ferndale, CaliforniaFri, Sep 24, 9:49 AM PDT · 18273 days ago · 21 km deep · 79 km away
34. 3.033 km SW of Ferndale, CaliforniaFri, Sep 24, 7:26 PM PDT · 18272 days ago · 25 km deep · 96 km away
35. 2.75 km SSE of Leggett, CaliforniaSat, Sep 25, 11:20 AM PDT · 18271 days ago · 13 km deep · 54 km away
36. 2.827 km WSW of Ferndale, CaliforniaMon, Sep 27, 1:05 AM PDT · 18270 days ago · 24 km deep · 98 km away
37. 1.523 km SSW of Ferndale, CaliforniaMon, Sep 27, 8:35 AM PDT · 18270 days ago · 22 km deep · 86 km away
38. 1.730 km SW of Ferndale, CaliforniaTue, Sep 28, 11:08 AM PDT · 18268 days ago · 21 km deep · 93 km away
39. 1.821 km NNW of Shelter Cove, CaliforniaWed, Sep 29, 7:23 AM PDT · 18268 days ago · 4 km deep · 64 km away
40. 1.817 km E of Redcrest, CaliforniaWed, Sep 29, 9:26 AM PDT · 18268 days ago · 22 km deep · 32 km away
41. 2.533 km SW of Ferndale, CaliforniaThu, Sep 30, 4:26 PM PDT · 18266 days ago · 25 km deep · 94 km away
42. 1.731 km SW of Ferndale, CaliforniaThu, Sep 30, 11:49 PM PDT · 18266 days ago · 19 km deep · 93 km away
43. 1.622 km SW of Scotia, CaliforniaFri, Oct 1, 7:08 AM PDT · 18266 days ago · 11 km deep · 75 km away
44. 1.922 km SSW of Ferndale, CaliforniaFri, Oct 1, 1:22 PM PDT · 18265 days ago · 19 km deep · 81 km away
45. 2.010 km ENE of Hydesville, CaliforniaFri, Oct 1, 1:39 PM PDT · 18265 days ago · 22 km deep · 61 km away
46. 1.615 km SW of Ferndale, CaliforniaSun, Oct 3, 10:50 PM PDT · 18263 days ago · 22 km deep · 85 km away
47. 1.815 km ESE of Burnt Ranch, CaliforniaTue, Oct 5, 12:48 AM PDT · 18262 days ago · 16 km deep · 56 km away
48. 1.611 km SSW of Scotia, CaliforniaWed, Oct 6, 4:58 PM PDT · 18260 days ago · 25 km deep · 66 km away
49. 1.617 km SW of Trinity Village, CaliforniaWed, Oct 6, 7:59 PM PDT · 18260 days ago · 32 km deep · 60 km away
50. 1.616 km ENE of Weott, CaliforniaSun, Oct 10, 4:43 PM PDT · 18256 days ago · 29 km deep · 32 km away
51. 2.532 km SSW of Ferndale, CaliforniaMon, Oct 11, 2:11 AM PDT · 18256 days ago · 16 km deep · 88 km away
52. 1.634 km SSW of Ferndale, CaliforniaMon, Oct 11, 9:08 AM PDT · 18256 days ago · 13 km deep · 88 km away
53. 1.536 km SSW of Ferndale, CaliforniaThu, Oct 14, 1:59 PM PDT · 18252 days ago · 20 km deep · 93 km away
54. 1.719 km SW of Ferndale, CaliforniaFri, Oct 15, 12:41 AM PDT · 18252 days ago · 24 km deep · 90 km away
55. 2.528 km SW of Scotia, CaliforniaSat, Oct 16, 4:16 PM PDT · 18250 days ago · 18 km deep · 82 km away
56. 2.46 km ENE of Fieldbrook, CaliforniaSun, Oct 17, 1:44 AM PDT · 18250 days ago · 24 km deep · 94 km away
57. 2.114 km W of Mad River, CaliforniaWed, Oct 20, 8:02 PM PDT · 18246 days ago · 22 km deep · 30 km away
58. 1.79 km SE of Pine Hills, CaliforniaSat, Oct 23, 2:09 AM PDT · 18244 days ago · 22 km deep · 73 km away
59. 3.430 km SSW of Ferndale, CaliforniaTue, Oct 26, 4:23 PM PDT · 18240 days ago · 20 km deep · 86 km away
60. 1.921 km NE of Hydesville, CaliforniaWed, Oct 27, 2:03 AM PDT · 18240 days ago · 22 km deep · 60 km away

The first 60 of 74.

Before

1. 2.513 km WSW of Ferndale, CaliforniaThu, Sep 9, 3:59 AM PDT · 18288 days ago · 22 km deep · 91 km away
2. 2.5Northern CaliforniaThu, Sep 9, 3:35 AM PDT · 18288 days ago · 26 km deep · 18 km away
3. 1.520 km SW of Ferndale, CaliforniaThu, Sep 9, 12:03 AM PDT · 18288 days ago · 22 km deep · 89 km away
4. 1.80 km NNW of Humboldt Hill, CaliforniaTue, Sep 7, 3:58 PM PDT · 18289 days ago · 10 km deep · 85 km away
5. 1.71 km NNW of Humboldt Hill, CaliforniaTue, Sep 7, 3:27 PM PDT · 18289 days ago · 9 km deep · 85 km away
6. 1.71 km NNW of Humboldt Hill, CaliforniaTue, Sep 7, 8:18 AM PDT · 18290 days ago · 10 km deep · 85 km away
7. 1.91 km NNW of Humboldt Hill, CaliforniaTue, Sep 7, 3:19 AM PDT · 18290 days ago · 10 km deep · 85 km away
8. 1.61 km NE of Fields Landing, CaliforniaMon, Sep 6, 4:34 PM PDT · 18290 days ago · 12 km deep · 85 km away
9. 1.71 km NW of Humboldt Hill, CaliforniaMon, Sep 6, 4:13 PM PDT · 18290 days ago · 10 km deep · 85 km away
10. 1.67 km NNW of Alderpoint, CaliforniaFri, Sep 3, 11:16 AM PDT · 18293 days ago · 27 km deep · 22 km away
11. 1.812 km ENE of Hydesville, CaliforniaWed, Sep 1, 2:04 AM PDT · 18296 days ago · 21 km deep · 61 km away
12. 3.528 km SW of Ferndale, CaliforniaSun, Aug 29, 3:04 PM PDT · 18298 days ago · 28 km deep · 94 km away
13. 1.610 km WNW of Ferndale, CaliforniaThu, Aug 26, 12:09 AM PDT · 18302 days ago · 4 km deep · 91 km away
14. 3.28 km N of Leggett, CaliforniaWed, Aug 25, 11:04 PM PDT · 18302 days ago · 4 km deep · 45 km away
15. 1.729 km SW of Scotia, CaliforniaWed, Aug 25, 9:33 AM PDT · 18303 days ago · 22 km deep · 81 km away
16. 2.4near the coast of Northern CaliforniaWed, Aug 25, 5:28 AM PDT · 18303 days ago · 21 km deep · 45 km away
17. 2.1Northern CaliforniaTue, Aug 24, 9:11 PM PDT · 18303 days ago · 16 km deep · 35 km away
18. 2.56 km N of Leggett, CaliforniaMon, Aug 23, 11:29 PM PDT · 18304 days ago · 4 km deep · 46 km away
19. 2.110 km NNE of Leggett, CaliforniaMon, Aug 23, 2:35 AM PDT · 18305 days ago · 7 km deep · 42 km away
20. 1.611 km ESE of Benbow, CaliforniaSun, Aug 22, 10:44 PM PDT · 18305 days ago · 10 km deep · 36 km away

From the USGS Earthquake Hazards Program and its partner networks, event nc1031440. Read Mon, Oct 5, 2026, 4:30 AM UTC.