M2.1 earthquake 6 km N of Hyampom, California

Magnitude

2.1 (md), micro

Local time

Sat, Jul 18, 1981, 2:37 AM PDT

UTC

1981-07-18 09:37:14 UTC

Depth

14.4 km (8.9 mi), shallow

Epicenter

40.676° N, 123.441° W

Region

California

Tsunami flag

No

Status

Reviewed by a seismologist

Location uncertainty

About 1.1 km horizontally, 3.8 km in depth

Depth from

From location

Station coverage gap

289°, poorly surrounded by stations

Stations used

4

• Hayfork, CaliforniaPopulation 2,368. Forecast26 kmWNW
• Bayside, CaliforniaPopulation 17,132. Forecast56 kmESE
• Chico, CaliforniaPopulation 121,345. Forecast172 kmNW
• Los Angeles, CaliforniaPopulation 3,820,914. Forecast868 kmNNW

After

1. 1.58 km W of Rio Dell, CaliforniaSat, Jul 18, 10:18 AM PDT · 16502 days ago · 22 km deep · 68 km away
2. 2.532 km SW of Scotia, CaliforniaSun, Jul 19, 7:13 AM PDT · 16501 days ago · 25 km deep · 91 km away
3. 1.621 km WSW of Weott, CaliforniaSun, Jul 19, 2:17 PM PDT · 16501 days ago · 3 km deep · 77 km away
4. 1.933 km SSW of Ferndale, CaliforniaMon, Jul 20, 7:55 AM PDT · 16500 days ago · 23 km deep · 94 km away
5. 1.90 km SSE of Burnt Ranch, CaliforniaWed, Jul 22, 1:13 PM PDT · 16498 days ago · 34 km deep · 14 km away
6. 2.227 km WSW of Ferndale, CaliforniaThu, Jul 23, 8:36 AM PDT · 16497 days ago · 24 km deep · 96 km away
7. 1.730 km SW of Ferndale, CaliforniaThu, Jul 23, 9:57 AM PDT · 16497 days ago · 26 km deep · 99 km away
8. 2.311 km N of Covelo, CaliforniaThu, Jul 23, 9:52 PM PDT · 16497 days ago · 0 km deep · 88 km away
9. 1.96 km SSW of Fortuna, CaliforniaFri, Jul 24, 4:07 PM PDT · 16496 days ago · 10 km deep · 65 km away
10. 2.130 km W of Trinidad, CaliforniaFri, Jul 24, 8:05 PM PDT · 16496 days ago · 4 km deep · 97 km away
11. 2.027 km SW of Ferndale, CaliforniaSat, Jul 25, 12:37 PM PDT · 16495 days ago · 17 km deep · 93 km away
12. 2.014 km NE of Myers Flat, CaliforniaSun, Jul 26, 5:14 PM PDT · 16494 days ago · 1 km deep · 44 km away
13. 2.122 km WSW of Weott, CaliforniaSun, Jul 26, 6:46 PM PDT · 16494 days ago · 9 km deep · 78 km away
14. 1.920 km SSW of Ferndale, CaliforniaMon, Jul 27, 2:54 AM PDT · 16494 days ago · 18 km deep · 83 km away
15. 1.72 km SW of Indianola, CaliforniaTue, Jul 28, 8:40 AM PDT · 16492 days ago · 9 km deep · 69 km away
16. 1.71 km SSW of Loleta, CaliforniaTue, Jul 28, 7:59 PM PDT · 16492 days ago · 17 km deep · 67 km away
17. 2.16 km SE of Scotia, CaliforniaWed, Jul 29, 4:16 PM PDT · 16491 days ago · 24 km deep · 57 km away
18. 2.07 km SSW of Scotia, CaliforniaThu, Jul 30, 6:54 AM PDT · 16490 days ago · 27 km deep · 66 km away
19. 1.92 km S of Lakehead, CaliforniaFri, Jul 31, 3:05 PM PDT · 16489 days ago · 4 km deep · 92 km away
20. 2.35 km WSW of Rio Dell, CaliforniaSun, Aug 2, 11:35 AM PDT · 16487 days ago · 19 km deep · 65 km away
21. 2.128 km SW of Ferndale, CaliforniaMon, Aug 3, 3:47 AM PDT · 16486 days ago · 32 km deep · 97 km away
22. 1.919 km SSW of Ferndale, CaliforniaWed, Aug 5, 12:15 AM PDT · 16485 days ago · 28 km deep · 80 km away
23. 1.92 km NE of Garberville, CaliforniaThu, Aug 6, 4:30 AM PDT · 16483 days ago · 17 km deep · 69 km away
24. 1.710 km SSW of Ferndale, CaliforniaSat, Aug 8, 9:15 AM PDT · 16481 days ago · 20 km deep · 77 km away
25. 2.512 km SSW of Ferndale, CaliforniaSun, Aug 9, 9:23 PM PDT · 16480 days ago · 18 km deep · 76 km away
26. 2.04 km N of Redway, CaliforniaMon, Aug 10, 1:52 AM PDT · 16480 days ago · 20 km deep · 66 km away
27. 2.04 km E of Indianola, CaliforniaThu, Aug 13, 11:44 AM PDT · 16476 days ago · -1 km deep · 52 km away
28. 2.815 km WSW of Trinidad, CaliforniaThu, Aug 13, 12:43 PM PDT · 16476 days ago · 12 km deep · 83 km away
29. 1.534 km SSW of Ferndale, CaliforniaFri, Aug 14, 2:50 AM PDT · 16476 days ago · 20 km deep · 95 km away
30. 2.615 km WSW of Scotia, CaliforniaFri, Aug 14, 9:35 AM PDT · 16475 days ago · 30 km deep · 75 km away
31. 1.616 km WNW of Fields Landing, CaliforniaFri, Aug 14, 3:41 PM PDT · 16475 days ago · 22 km deep · 81 km away
32. 1.96 km SSW of Fortuna, CaliforniaSat, Aug 15, 12:07 AM PDT · 16475 days ago · 11 km deep · 65 km away
33. 2.02 km SE of Indianola, CaliforniaSat, Aug 15, 7:53 PM PDT · 16474 days ago · 14 km deep · 65 km away
34. 1.52 km SE of Indianola, CaliforniaSat, Aug 15, 8:00 PM PDT · 16474 days ago · 14 km deep · 65 km away
35. 2.017 km SSW of Ferndale, CaliforniaSat, Aug 15, 9:39 PM PDT · 16474 days ago · 23 km deep · 81 km away
36. 1.65 km SE of Ferndale, CaliforniaSun, Aug 16, 3:15 AM PDT · 16473 days ago · 12 km deep · 66 km away
37. 1.615 km S of Etna, CaliforniaSun, Aug 16, 3:59 AM PDT · 16473 days ago · 3 km deep · 86 km away
38. 1.7near the coast of Northern CaliforniaWed, Aug 19, 4:12 PM PDT · 16470 days ago · 10 km deep · 86 km away
39. 2.124 km SW of Scotia, CaliforniaWed, Aug 19, 4:13 PM PDT · 16470 days ago · 11 km deep · 83 km away
40. 1.7near the coast of Northern CaliforniaThu, Aug 20, 3:33 AM PDT · 16469 days ago · 21 km deep · 66 km away
41. 2.86 km WSW of Rio Dell, CaliforniaThu, Aug 20, 4:43 AM PDT · 16469 days ago · 22 km deep · 66 km away
42. 2.12 km SSW of Loleta, CaliforniaThu, Aug 20, 6:46 AM PDT · 16469 days ago · 19 km deep · 68 km away
43. 2.112 km SSE of Mad River, CaliforniaThu, Aug 20, 9:50 AM PDT · 16469 days ago · 27 km deep · 37 km away
44. 1.812 km W of Mad River, CaliforniaFri, Aug 21, 12:51 AM PDT · 16469 days ago · 0 km deep · 33 km away
45. 2.65 km ESE of Trinity Village, CaliforniaSat, Aug 22, 9:14 AM PDT · 16467 days ago · 33 km deep · 21 km away
46. 1.816 km NW of Manila, CASat, Aug 22, 11:12 AM PDT · 16467 days ago · 12 km deep · 79 km away
47. 2.318 km WNW of Manila, CaliforniaSat, Aug 22, 11:13 AM PDT · 16467 days ago · 12 km deep · 82 km away
48. 3.233 km SW of Scotia, CaliforniaSat, Aug 22, 12:31 PM PDT · 16467 days ago · 27 km deep · 92 km away
49. 2.425 km SW of Ferndale, CaliforniaSun, Aug 23, 2:58 AM PDT · 16467 days ago · 28 km deep · 92 km away
50. 1.633 km SSW of Ferndale, CaliforniaMon, Aug 24, 12:01 PM PDT · 16465 days ago · 34 km deep · 96 km away
51. 1.811 km SSW of Ferndale, CaliforniaMon, Aug 24, 10:52 PM PDT · 16465 days ago · 20 km deep · 75 km away
52. 1.630 km WSW of Ferndale, CaliforniaTue, Aug 25, 3:04 AM PDT · 16464 days ago · 27 km deep · 99 km away
53. 1.811 km S of Ferndale, CaliforniaTue, Aug 25, 8:44 PM PDT · 16464 days ago · 20 km deep · 74 km away
54. 2.013 km SSW of Ferndale, CaliforniaThu, Aug 27, 9:54 AM PDT · 16462 days ago · 19 km deep · 78 km away
55. 1.811 km WSW of Hyampom, CaliforniaThu, Aug 27, 8:21 PM PDT · 16462 days ago · 30 km deep · 15 km away
56. 2.56 km SE of Ferndale, CaliforniaThu, Aug 27, 9:17 PM PDT · 16462 days ago · 12 km deep · 66 km away
57. 2.130 km SW of Ferndale, CaliforniaFri, Aug 28, 9:32 PM PDT · 16461 days ago · 29 km deep · 99 km away
58. 3.211 km WSW of Hayfork, CaliforniaSat, Aug 29, 8:31 PM PDT · 16460 days ago · 30 km deep · 23 km away
59. 2.234 km SW of Ferndale, CaliforniaWed, Sep 2, 6:56 AM PDT · 16456 days ago · 33 km deep · 99 km away
60. 1.626 km WSW of Burnt Ranch, CaliforniaFri, Sep 4, 12:22 AM PDT · 16455 days ago · 27 km deep · 26 km away

The first 60 of 73.

Before

1. 2.36 km ESE of Ferndale, CaliforniaFri, Jul 17, 5:23 PM PDT · 16503 days ago · 12 km deep · 66 km away
2. 2.06 km SE of Ferndale, CaliforniaFri, Jul 17, 12:28 PM PDT · 16503 days ago · 13 km deep · 66 km away
3. 1.924 km NNW of Shelter Cove, CaliforniaFri, Jul 17, 10:42 AM PDT · 16503 days ago · 4 km deep · 80 km away
4. 2.822 km WSW of Weott, CaliforniaFri, Jul 17, 10:34 AM PDT · 16503 days ago · 8 km deep · 78 km away
5. 1.920 km WSW of Weott, CaliforniaFri, Jul 17, 10:05 AM PDT · 16503 days ago · 9 km deep · 77 km away
6. 1.823 km WSW of Weott, CaliforniaFri, Jul 17, 9:42 AM PDT · 16503 days ago · 4 km deep · 79 km away
7. 4.623 km WSW of Weott, CaliforniaFri, Jul 17, 9:37 AM PDT · 16503 days ago · 10 km deep · 79 km away
8. 2.018 km ESE of Blue Lake, CaliforniaFri, Jul 17, 5:20 AM PDT · 16503 days ago · 32 km deep · 33 km away
9. 1.72 km SSW of Loleta, CaliforniaWed, Jul 15, 12:15 PM PDT · 16505 days ago · 21 km deep · 68 km away
10. 1.57 km WSW of Rio Dell, CaliforniaMon, Jul 13, 9:38 PM PDT · 16507 days ago · 17 km deep · 67 km away
11. 3.213 km NW of Manila, CaliforniaMon, Jul 13, 10:28 AM PDT · 16507 days ago · 11 km deep · 77 km away
12. 2.413 km NW of Manila, CaliforniaMon, Jul 13, 10:24 AM PDT · 16507 days ago · 12 km deep · 76 km away
13. 1.916 km NW of Samoa, CaliforniaSun, Jul 12, 8:22 PM PDT · 16508 days ago · 0 km deep · 80 km away
14. 2.05 km NW of Redway, CaliforniaSun, Jul 12, 6:04 AM PDT · 16508 days ago · 20 km deep · 68 km away
15. 2.121 km SW of Ferndale, CaliforniaThu, Jul 9, 11:59 PM PDT · 16511 days ago · 21 km deep · 86 km away
16. 1.912 km N of Alderpoint, CaliforniaThu, Jul 9, 3:07 PM PDT · 16511 days ago · 29 km deep · 46 km away
17. 1.917 km SE of Etna, CaliforniaWed, Jul 8, 11:59 PM PDT · 16512 days ago · 3 km deep · 93 km away
18. 2.018 km SSW of Ferndale, CaliforniaTue, Jul 7, 5:10 PM PDT · 16513 days ago · 17 km deep · 81 km away
19. 1.816 km SW of Scotia, CaliforniaMon, Jul 6, 5:29 AM PDT · 16514 days ago · 29 km deep · 75 km away
20. 2.09 km NNW of Manila, CaliforniaMon, Jul 6, 2:29 AM PDT · 16515 days ago · 14 km deep · 71 km away

From the USGS Earthquake Hazards Program and its partner networks, event nc1065689. Read Tue, Sep 22, 2026, 9:31 PM UTC.