M1.9 earthquake 12 km W of Samoa, California

Magnitude

1.9 (md), micro

Local time

Fri, Apr 20, 1979, 11:37 PM PST

UTC

1979-04-21 07:37:58 UTC

Depth

22.4 km (13.9 mi), shallow

Epicenter

40.797° N, 124.337° W

Region

California

Tsunami flag

No

Status

Reviewed by a seismologist

Location uncertainty

About 1.1 km horizontally, 0.6 km in depth

Magnitude uncertainty

±0.06

Depth from

From location

Station coverage gap

238°, poorly surrounded by stations

Stations used

10

• Bayview, CaliforniaPopulation 2,510. Forecast13 kmWNW
• Eureka, CaliforniaPopulation 27,017. Forecast15 kmW
• Chico, CaliforniaPopulation 121,345. Forecast243 kmWNW

After

1. 2.324 km SSW of Ferndale, CaliforniaSat, Apr 21, 9:00 AM PST · 17329 days ago · 19 km deep · 47 km away
2. 2.613 km WNW of Ferndale, CaliforniaSat, Apr 21, 9:49 AM PST · 17329 days ago · 21 km deep · 19 km away
3. 2.013 km WSW of Burnt Ranch, CaliforniaSun, Apr 22, 4:35 AM PST · 17328 days ago · 34 km deep · 60 km away
4. 1.66 km WSW of Scotia, CaliforniaSun, Apr 22, 9:05 AM PST · 17328 days ago · 27 km deep · 41 km away
5. 1.828 km SW of Ferndale, CaliforniaTue, Apr 24, 2:48 AM PST · 17326 days ago · 23 km deep · 48 km away
6. 3.073 km W of Ferndale, CaliforniaTue, Apr 24, 5:58 AM PST · 17326 days ago · 2 km deep · 76 km away
7. 1.890 km W of Trinidad, CaliforniaTue, Apr 24, 7:46 AM PST · 17326 days ago · 5 km deep · 79 km away
8. 1.614 km SSW of Ferndale, CaliforniaTue, Apr 24, 7:57 PM PST · 17325 days ago · 26 km deep · 38 km away
9. 3.496 km W of Ferndale, CaliforniaTue, Apr 24, 8:48 PM PST · 17325 days ago · 5 km deep · 98 km away
10. 2.03 km NNE of Hydesville, CaliforniaWed, Apr 25, 2:42 AM PST · 17325 days ago · 24 km deep · 32 km away
11. 1.710 km SW of Scotia, CaliforniaWed, Apr 25, 11:44 AM PST · 17325 days ago · 17 km deep · 45 km away
12. 1.865 km WSW of Ferndale, CaliforniaWed, Apr 25, 3:19 PM PST · 17325 days ago · 9 km deep · 72 km away
13. 1.725 km SSW of Ferndale, CaliforniaWed, Apr 25, 9:11 PM PST · 17324 days ago · 18 km deep · 47 km away
14. 1.63 km N of Redway, CaliforniaThu, Apr 26, 6:54 AM PST · 17324 days ago · 17 km deep · 84 km away
15. 1.867 km WNW of Samoa, CaliforniaThu, Apr 26, 8:13 PM PST · 17323 days ago · 5 km deep · 56 km away
16. 1.630 km SW of Ferndale, CaliforniaFri, Apr 27, 4:36 PM PST · 17322 days ago · 17 km deep · 49 km away
17. 1.710 km SW of Scotia, CaliforniaFri, Apr 27, 5:08 PM PST · 17322 days ago · 17 km deep · 45 km away
18. 2.114 km SSW of Willow Creek, CaliforniaSun, Apr 29, 4:55 AM PDT · 17321 days ago · 7 km deep · 54 km away
19. 1.726 km SW of Ferndale, CaliforniaSun, Apr 29, 1:04 PM PDT · 17321 days ago · 24 km deep · 42 km away
20. 2.911 km WNW of Samoa, CaliforniaMon, Apr 30, 9:37 AM PDT · 17320 days ago · 23 km deep · 9 km away
21. 1.719 km E of Hydesville, CaliforniaTue, May 1, 5:40 AM PDT · 17319 days ago · 20 km deep · 46 km away
22. 1.636 km SSW of Ferndale, CaliforniaTue, May 1, 3:01 PM PDT · 17319 days ago · 20 km deep · 58 km away
23. 2.086 km W of Ferndale, CaliforniaThu, May 3, 4:42 PM PDT · 17317 days ago · 5 km deep · 86 km away
24. 2.379 km W of Ferndale, CAThu, May 3, 5:17 PM PDT · 17317 days ago · 5 km deep · 76 km away
25. 1.725 km SW of Ferndale, CaliforniaThu, May 3, 5:50 PM PDT · 17316 days ago · 26 km deep · 45 km away
26. 1.648 km W of Trinidad, CaliforniaThu, May 3, 10:47 PM PDT · 17316 days ago · 8 km deep · 39 km away
27. 1.86 km NW of Samoa, CaliforniaFri, May 4, 12:11 AM PDT · 17316 days ago · 35 km deep · 11 km away
28. 3.097 km W of Ferndale, CaliforniaFri, May 4, 12:40 AM PDT · 17316 days ago · 55 km deep · 99 km away
29. 1.725 km SW of Ferndale, CaliforniaFri, May 4, 1:20 AM PDT · 17316 days ago · 26 km deep · 45 km away
30. 1.68 km W of Weott, CaliforniaFri, May 4, 3:48 AM PDT · 17316 days ago · 23 km deep · 58 km away
31. 1.816 km WSW of Scotia, CaliforniaFri, May 4, 9:25 PM PDT · 17315 days ago · 21 km deep · 43 km away
32. 1.516 km WSW of Scotia, CaliforniaSat, May 5, 5:33 AM PDT · 17315 days ago · 18 km deep · 43 km away
33. 2.232 km W of Indianola, CaliforniaSat, May 5, 1:23 PM PDT · 17315 days ago · 42 km deep · 24 km away
34. 1.88 km NW of Manila, CaliforniaTue, May 8, 3:42 AM PDT · 17312 days ago · 18 km deep · 14 km away
35. 2.045 km WSW of Ferndale, CaliforniaTue, May 8, 6:29 AM PDT · 17312 days ago · 19 km deep · 51 km away
36. 1.66 km SW of Ferndale, CaliforniaTue, May 8, 6:30 AM PDT · 17312 days ago · 25 km deep · 30 km away
37. 1.534 km W of Ferndale, CaliforniaTue, May 8, 7:42 AM PDT · 17312 days ago · 19 km deep · 42 km away
38. 3.176 km WSW of Ferndale, CaliforniaTue, May 8, 8:50 AM PDT · 17312 days ago · 24 km deep · 81 km away
39. 1.670 km WNW of Ferndale, CaliforniaTue, May 8, 9:05 AM PDT · 17312 days ago · 4 km deep · 61 km away
40. 1.63 km ENE of Loleta, CaliforniaTue, May 8, 6:06 PM PDT · 17311 days ago · 20 km deep · 20 km away
41. 2.8105 km WNW of Ferndale, CaliforniaWed, May 9, 5:22 PM PDT · 17311 days ago · 4 km deep · 96 km away
42. 1.615 km SSW of Ferndale, CaliforniaWed, May 9, 7:19 PM PDT · 17310 days ago · 9 km deep · 38 km away
43. 2.427 km SSW of Scotia, CaliforniaThu, May 10, 9:13 AM PDT · 17310 days ago · 21 km deep · 60 km away
44. 1.623 km WSW of Ferndale, CaliforniaThu, May 10, 9:55 AM PDT · 17310 days ago · 20 km deep · 35 km away
45. 1.829 km WSW of Ferndale, CaliforniaFri, May 11, 2:07 PM PDT · 17309 days ago · 25 km deep · 42 km away
46. 2.121 km WSW of Weott, CaliforniaFri, May 11, 4:02 PM PDT · 17309 days ago · 3 km deep · 63 km away
47. 1.732 km SSW of Ferndale, CaliforniaSat, May 12, 12:25 PM PDT · 17308 days ago · 36 km deep · 53 km away
48. 2.794 km W of Ferndale, CaliforniaSat, May 12, 7:21 PM PDT · 17307 days ago · 4 km deep · 89 km away
49. 1.639 km SW of Ferndale, CaliforniaSun, May 13, 3:24 AM PDT · 17307 days ago · 18 km deep · 58 km away
50. 1.730 km WSW of Ferndale, CaliforniaSun, May 13, 4:47 AM PDT · 17307 days ago · 25 km deep · 43 km away
51. 1.919 km WSW of Scotia, CaliforniaSun, May 13, 10:04 AM PDT · 17307 days ago · 28 km deep · 44 km away
52. 1.89 km WSW of Scotia, CaliforniaSun, May 13, 2:02 PM PDT · 17307 days ago · 27 km deep · 41 km away
53. 2.99 km WSW of Scotia, CaliforniaSun, May 13, 9:57 PM PDT · 17306 days ago · 28 km deep · 41 km away
54. 1.78 km WSW of Scotia, CaliforniaMon, May 14, 4:39 AM PDT · 17306 days ago · 27 km deep · 41 km away
55. 2.238 km W of Ferndale, CaliforniaMon, May 14, 7:23 AM PDT · 17306 days ago · 20 km deep · 41 km away
56. 2.516 km WSW of Ferndale, CaliforniaMon, May 14, 9:43 PM PDT · 17305 days ago · 17 km deep · 32 km away
57. 2.216 km WSW of Ferndale, CaliforniaMon, May 14, 9:49 PM PDT · 17305 days ago · 17 km deep · 33 km away
58. 1.715 km WSW of Ferndale, CaliforniaMon, May 14, 9:52 PM PDT · 17305 days ago · 15 km deep · 33 km away
59. 2.626 km SSW of Ferndale, CaliforniaMon, May 14, 9:56 PM PDT · 17305 days ago · 18 km deep · 47 km away
60. 1.620 km WSW of Ferndale, CaliforniaMon, May 14, 10:53 PM PDT · 17305 days ago · 16 km deep · 33 km away

The first 60 of 150.

Before

1. 1.731 km WSW of Ferndale, CaliforniaFri, Apr 20, 10:05 AM PST · 17330 days ago · 19 km deep · 46 km away
2. 1.511 km NW of Hayfork, CaliforniaFri, Apr 20, 7:54 AM PST · 17330 days ago · 4 km deep · 92 km away
3. 2.211 km N of Willow Creek, CaliforniaFri, Apr 20, 6:26 AM PST · 17330 days ago · 7 km deep · 64 km away
4. 2.511 km WSW of Ferndale, CaliforniaThu, Apr 19, 5:59 PM PST · 17330 days ago · 16 km deep · 30 km away
5. 1.837 km SW of Ferndale, CaliforniaThu, Apr 19, 1:04 AM PST · 17331 days ago · 22 km deep · 57 km away
6. 1.515 km NE of Blue Lake, CaliforniaWed, Apr 18, 9:51 PM PST · 17331 days ago · 22 km deep · 46 km away
7. 2.239 km SW of Ferndale, CaliforniaWed, Apr 18, 5:55 PM PST · 17331 days ago · 18 km deep · 57 km away
8. 1.610 km WSW of Redcrest, CaliforniaWed, Apr 18, 5:11 PM PST · 17331 days ago · 29 km deep · 53 km away
9. 2.653 km WSW of Ferndale, CaliforniaWed, Apr 18, 12:08 AM PST · 17332 days ago · 15 km deep · 63 km away
10. 2.027 km SW of Ferndale, CaliforniaMon, Apr 16, 9:20 AM PST · 17334 days ago · 19 km deep · 47 km away
11. 2.324 km SW of Ferndale, CaliforniaMon, Apr 16, 4:19 AM PST · 17334 days ago · 20 km deep · 45 km away
12. 1.718 km SW of Weott, CaliforniaMon, Apr 16, 4:07 AM PST · 17334 days ago · 13 km deep · 69 km away
13. 2.027 km SW of Ferndale, CaliforniaSun, Apr 15, 8:20 PM PST · 17334 days ago · 18 km deep · 47 km away
14. 2.447 km WSW of Ferndale, CaliforniaSun, Apr 15, 12:52 PM PST · 17335 days ago · 23 km deep · 57 km away
15. 2.25 km ESE of Burnt Ranch, CaliforniaSun, Apr 15, 8:41 AM PST · 17335 days ago · 22 km deep · 77 km away
16. 1.826 km SSW of Scotia, CaliforniaSun, Apr 15, 4:28 AM PST · 17335 days ago · 18 km deep · 59 km away
17. 1.738 km SW of Ferndale, CaliforniaSat, Apr 14, 3:50 PM PST · 17336 days ago · 21 km deep · 58 km away
18. 1.78 km W of Rio Dell, CaliforniaSat, Apr 14, 1:23 PM PST · 17336 days ago · 19 km deep · 36 km away
19. 2.332 km SW of Ferndale, CaliforniaSat, Apr 14, 4:54 AM PST · 17336 days ago · 19 km deep · 48 km away
20. 1.76 km NNW of Willow Creek, CaliforniaFri, Apr 13, 10:14 PM PST · 17336 days ago · 22 km deep · 60 km away

From the USGS Earthquake Hazards Program and its partner networks, event nc1045494. Read Wed, Sep 30, 2026, 11:56 AM UTC.