M1.9 earthquake 12 km N of Alderpoint, California

Magnitude

1.9 (md), micro

Local time

Thu, Jul 9, 1981, 3:07 PM PDT

UTC

1981-07-09 22:07:59 UTC

Depth

29.3 km (18.2 mi), shallow

Epicenter

40.291° N, 123.628° W

Region

California

Tsunami flag

No

Status

Reviewed by a seismologist

Location uncertainty

About 0.7 km horizontally, 1.0 km in depth

Magnitude uncertainty

±0.13

Depth from

From location

Station coverage gap

144°

Stations used

17

• Miranda, CaliforniaPopulation 520. Forecast18 kmENE
• Fortuna, CaliforniaPopulation 12,000. Forecast56 kmSE
• Chico, CaliforniaPopulation 121,345. Forecast165 kmWNW
• Los Angeles, CaliforniaPopulation 3,820,914. Forecast842 kmNNW

After

1. 2.121 km SW of Ferndale, CaliforniaThu, Jul 9, 11:59 PM PDT · 16517 days ago · 21 km deep · 68 km away
2. 2.05 km NW of Redway, CaliforniaSun, Jul 12, 6:04 AM PDT · 16515 days ago · 20 km deep · 25 km away
3. 2.242 km SW of Ferndale, CaliforniaSun, Jul 12, 4:55 PM PDT · 16515 days ago · 24 km deep · 86 km away
4. 1.916 km NW of Samoa, CaliforniaSun, Jul 12, 8:22 PM PDT · 16515 days ago · 0 km deep · 91 km away
5. 2.413 km NW of Manila, CaliforniaMon, Jul 13, 10:24 AM PDT · 16514 days ago · 12 km deep · 90 km away
6. 3.213 km NW of Manila, CaliforniaMon, Jul 13, 10:28 AM PDT · 16514 days ago · 11 km deep · 90 km away
7. 1.57 km WSW of Rio Dell, CaliforniaMon, Jul 13, 9:38 PM PDT · 16513 days ago · 17 km deep · 52 km away
8. 2.438 km SW of Ferndale, CaliforniaTue, Jul 14, 7:11 PM PDT · 16513 days ago · 28 km deep · 82 km away
9. 1.72 km SSW of Loleta, CaliforniaWed, Jul 15, 12:15 PM PDT · 16512 days ago · 21 km deep · 64 km away
10. 2.345 km SW of Ferndale, CaliforniaWed, Jul 15, 10:22 PM PDT · 16511 days ago · 22 km deep · 90 km away
11. 2.144 km SW of Ferndale, CaliforniaThu, Jul 16, 12:39 AM PDT · 16511 days ago · 22 km deep · 88 km away
12. 1.749 km SW of Ferndale, CaliforniaThu, Jul 16, 3:58 AM PDT · 16511 days ago · 17 km deep · 94 km away
13. 1.738 km WSW of Ferndale, CaliforniaThu, Jul 16, 11:08 AM PDT · 16511 days ago · 27 km deep · 89 km away
14. 2.018 km ESE of Blue Lake, CaliforniaFri, Jul 17, 5:20 AM PDT · 16510 days ago · 32 km deep · 59 km away
15. 4.623 km WSW of Weott, CaliforniaFri, Jul 17, 9:37 AM PDT · 16510 days ago · 10 km deep · 46 km away
16. 1.823 km WSW of Weott, CaliforniaFri, Jul 17, 9:42 AM PDT · 16510 days ago · 4 km deep · 47 km away
17. 1.920 km WSW of Weott, CaliforniaFri, Jul 17, 10:05 AM PDT · 16510 days ago · 9 km deep · 44 km away
18. 2.822 km WSW of Weott, CaliforniaFri, Jul 17, 10:34 AM PDT · 16510 days ago · 8 km deep · 46 km away
19. 1.924 km NNW of Shelter Cove, CaliforniaFri, Jul 17, 10:42 AM PDT · 16510 days ago · 4 km deep · 48 km away
20. 2.06 km SE of Ferndale, CaliforniaFri, Jul 17, 12:28 PM PDT · 16510 days ago · 13 km deep · 56 km away
21. 2.36 km ESE of Ferndale, CaliforniaFri, Jul 17, 5:23 PM PDT · 16510 days ago · 12 km deep · 56 km away
22. 2.16 km N of Hyampom, CaliforniaSat, Jul 18, 2:37 AM PDT · 16509 days ago · 14 km deep · 46 km away
23. 1.58 km W of Rio Dell, CaliforniaSat, Jul 18, 10:18 AM PDT · 16509 days ago · 22 km deep · 54 km away
24. 2.532 km SW of Scotia, CaliforniaSun, Jul 19, 7:13 AM PDT · 16508 days ago · 25 km deep · 65 km away
25. 1.621 km WSW of Weott, CaliforniaSun, Jul 19, 2:17 PM PDT · 16508 days ago · 3 km deep · 45 km away
26. 1.933 km SSW of Ferndale, CaliforniaMon, Jul 20, 7:55 AM PDT · 16507 days ago · 23 km deep · 69 km away
27. 2.539 km SW of Ferndale, CaliforniaTue, Jul 21, 1:54 AM PDT · 16506 days ago · 24 km deep · 81 km away
28. 1.90 km SSE of Burnt Ranch, CaliforniaWed, Jul 22, 1:13 PM PDT · 16505 days ago · 34 km deep · 59 km away
29. 1.938 km SW of Ferndale, CaliforniaThu, Jul 23, 2:40 AM PDT · 16504 days ago · 33 km deep · 81 km away
30. 2.227 km WSW of Ferndale, CaliforniaThu, Jul 23, 8:36 AM PDT · 16504 days ago · 24 km deep · 79 km away
31. 1.730 km SW of Ferndale, CaliforniaThu, Jul 23, 9:57 AM PDT · 16504 days ago · 26 km deep · 80 km away
32. 2.311 km N of Covelo, CaliforniaThu, Jul 23, 9:52 PM PDT · 16503 days ago · 0 km deep · 54 km away
33. 1.737 km SW of Ferndale, CaliforniaFri, Jul 24, 1:40 AM PDT · 16503 days ago · 30 km deep · 78 km away
34. 1.96 km SSW of Fortuna, CaliforniaFri, Jul 24, 4:07 PM PDT · 16503 days ago · 10 km deep · 56 km away
35. 2.027 km SW of Ferndale, CaliforniaSat, Jul 25, 12:37 PM PDT · 16502 days ago · 17 km deep · 72 km away
36. 2.014 km NE of Myers Flat, CaliforniaSun, Jul 26, 5:14 PM PDT · 16501 days ago · 1 km deep · 13 km away
37. 2.122 km WSW of Weott, CaliforniaSun, Jul 26, 6:46 PM PDT · 16501 days ago · 9 km deep · 45 km away
38. 1.920 km SSW of Ferndale, CaliforniaMon, Jul 27, 2:54 AM PDT · 16500 days ago · 18 km deep · 63 km away
39. 2.538 km SW of Ferndale, CaliforniaMon, Jul 27, 7:51 PM PDT · 16500 days ago · 23 km deep · 81 km away
40. 1.72 km SW of Indianola, CaliforniaTue, Jul 28, 8:40 AM PDT · 16499 days ago · 9 km deep · 68 km away
41. 1.71 km SSW of Loleta, CaliforniaTue, Jul 28, 7:59 PM PDT · 16499 days ago · 17 km deep · 63 km away
42. 2.322 km WNW of Elk Creek, CaliforniaTue, Jul 28, 10:40 PM PDT · 16498 days ago · 7 km deep · 100 km away
43. 2.16 km SE of Scotia, CaliforniaWed, Jul 29, 4:16 PM PDT · 16498 days ago · 24 km deep · 39 km away
44. 1.512 km SSW of Laytonville, CaliforniaWed, Jul 29, 9:37 PM PDT · 16497 days ago · 1 km deep · 79 km away
45. 2.07 km SSW of Scotia, CaliforniaThu, Jul 30, 6:54 AM PDT · 16497 days ago · 27 km deep · 46 km away
46. 2.449 km SW of Ferndale, CaliforniaFri, Jul 31, 1:41 PM PDT · 16496 days ago · 29 km deep · 93 km away
47. 2.638 km SW of Ferndale, CaliforniaSat, Aug 1, 6:10 AM PDT · 16495 days ago · 24 km deep · 81 km away
48. 1.715 km S of Leggett, CaliforniaSun, Aug 2, 12:23 AM PDT · 16494 days ago · -1 km deep · 64 km away
49. 2.35 km WSW of Rio Dell, CaliforniaSun, Aug 2, 11:35 AM PDT · 16494 days ago · 19 km deep · 51 km away
50. 2.128 km SW of Ferndale, CaliforniaMon, Aug 3, 3:47 AM PDT · 16493 days ago · 32 km deep · 78 km away
51. 1.636 km WSW of Ferndale, CaliforniaMon, Aug 3, 9:16 AM PDT · 16493 days ago · 25 km deep · 90 km away
52. 1.919 km SSW of Ferndale, CaliforniaWed, Aug 5, 12:15 AM PDT · 16491 days ago · 28 km deep · 59 km away
53. 1.92 km NE of Garberville, CaliforniaThu, Aug 6, 4:30 AM PDT · 16490 days ago · 17 km deep · 23 km away
54. 2.037 km SW of Ferndale, CaliforniaThu, Aug 6, 9:20 AM PDT · 16490 days ago · 32 km deep · 80 km away
55. 2.238 km SW of Ferndale, CaliforniaSat, Aug 8, 12:33 AM PDT · 16488 days ago · 20 km deep · 85 km away
56. 1.710 km SSW of Ferndale, CaliforniaSat, Aug 8, 9:15 AM PDT · 16488 days ago · 20 km deep · 63 km away
57. 2.838 km SW of Ferndale, CaliforniaSat, Aug 8, 10:07 AM PDT · 16488 days ago · 26 km deep · 81 km away
58. 2.253 km SW of Ferndale, CaliforniaSun, Aug 9, 7:58 PM PDT · 16487 days ago · 15 km deep · 98 km away
59. 2.512 km SSW of Ferndale, CaliforniaSun, Aug 9, 9:23 PM PDT · 16486 days ago · 18 km deep · 60 km away
60. 2.04 km N of Redway, CaliforniaMon, Aug 10, 1:52 AM PDT · 16486 days ago · 20 km deep · 23 km away

The first 60 of 114.

Before

1. 2.018 km SSW of Ferndale, CaliforniaTue, Jul 7, 5:10 PM PDT · 16520 days ago · 17 km deep · 62 km away
2. 1.836 km SW of Ferndale, CaliforniaTue, Jul 7, 3:09 AM PDT · 16520 days ago · 22 km deep · 78 km away
3. 1.816 km SW of Scotia, CaliforniaMon, Jul 6, 5:29 AM PDT · 16521 days ago · 29 km deep · 54 km away
4. 2.09 km NNW of Manila, CaliforniaMon, Jul 6, 2:29 AM PDT · 16521 days ago · 14 km deep · 86 km away
5. 1.611 km SSW of Burnt Ranch, CaliforniaSat, Jul 4, 10:25 PM PDT · 16522 days ago · 30 km deep · 49 km away
6. 2.140 km SW of Ferndale, CaliforniaSat, Jul 4, 9:16 PM PDT · 16522 days ago · 31 km deep · 82 km away
7. 2.215 km WNW of Fields Landing, CaliforniaSat, Jul 4, 2:24 PM PDT · 16523 days ago · 8 km deep · 83 km away
8. 2.326 km SSW of Ferndale, CaliforniaSat, Jul 4, 11:38 AM PDT · 16523 days ago · 25 km deep · 66 km away
9. 3.14 km SSE of McKinleyville, CaliforniaThu, Jul 2, 11:49 PM PDT · 16524 days ago · 26 km deep · 79 km away
10. 1.66 km W of Trinidad, CaliforniaThu, Jul 2, 1:21 AM PDT · 16525 days ago · 19 km deep · 98 km away
11. 2.111 km WSW of Weott, CaliforniaWed, Jul 1, 8:19 PM PDT · 16526 days ago · 4 km deep · 35 km away
12. 3.15 km WSW of Paskenta, CaliforniaWed, Jul 1, 6:28 PM PDT · 16526 days ago · 4 km deep · 99 km away
13. 1.66 km SE of Ferndale, CaliforniaWed, Jul 1, 11:54 AM PDT · 16526 days ago · 2 km deep · 56 km away
14. 2.035 km SSW of Ferndale, CaliforniaWed, Jul 1, 9:06 AM PDT · 16526 days ago · 25 km deep · 70 km away
15. 1.921 km W of Ferndale, CaliforniaWed, Jul 1, 12:54 AM PDT · 16526 days ago · 22 km deep · 81 km away
16. 1.544 km SW of Ferndale, CaliforniaWed, Jul 1, 12:13 AM PDT · 16526 days ago · 22 km deep · 87 km away
17. 2.236 km SW of Ferndale, CaliforniaTue, Jun 30, 11:07 PM PDT · 16526 days ago · 28 km deep · 75 km away
18. 2.09 km E of Redcrest, CaliforniaTue, Jun 30, 3:25 PM PDT · 16527 days ago · 30 km deep · 21 km away
19. 2.137 km SW of Ferndale, CaliforniaTue, Jun 30, 1:51 AM PDT · 16527 days ago · 21 km deep · 77 km away
20. 2.038 km SW of Ferndale, CAMon, Jun 29, 7:19 PM PDT · 16528 days ago · 32 km deep · 78 km away

From the USGS Earthquake Hazards Program and its partner networks, event nc1065369. Read Tue, Sep 29, 2026, 3:15 PM UTC.