M1.5 earthquake 43 km WNW of Samoa, California

Magnitude

1.5 (md), micro

Local time

Thu, Oct 19, 1978, 9:44 PM PDT

UTC

1978-10-20 04:44:47 UTC

Depth

13.2 km (8.2 mi), shallow

Epicenter

40.939° N, 124.674° W

Region

California

Tsunami flag

No

Status

Reviewed by a seismologist

Location uncertainty

About 3.1 km horizontally, 1.4 km in depth

Depth from

From location

Station coverage gap

315°, poorly surrounded by stations

Stations used

4

• Manila, CaliforniaPopulation 784. Forecast44 kmWNW
• Eureka, CaliforniaPopulation 27,017. Forecast45 kmWNW
• Chico, CaliforniaPopulation 121,345. Forecast275 kmWNW

After

1. 2.926 km SSW of Ferndale, CaliforniaFri, Oct 20, 9:58 PM PDT · 17509 days ago · 19 km deep · 66 km away
2. 2.726 km SSW of Ferndale, CaliforniaFri, Oct 20, 10:54 PM PDT · 17509 days ago · 19 km deep · 66 km away
3. 1.726 km SSW of Ferndale, CaliforniaFri, Oct 20, 11:10 PM PDT · 17509 days ago · 19 km deep · 66 km away
4. 1.626 km SW of Ferndale, CaliforniaFri, Oct 20, 11:19 PM PDT · 17509 days ago · 18 km deep · 63 km away
5. 1.526 km SSW of Ferndale, CaliforniaSat, Oct 21, 1:23 AM PDT · 17509 days ago · 18 km deep · 66 km away
6. 1.734 km NW of Shelter Cove, CaliforniaSat, Oct 21, 7:17 AM PDT · 17509 days ago · 5 km deep · 84 km away
7. 1.524 km WSW of Ferndale, CaliforniaSat, Oct 21, 9:58 AM PDT · 17509 days ago · 24 km deep · 52 km away
8. 2.868 km W of Ferndale, CaliforniaSat, Oct 21, 11:54 AM PDT · 17509 days ago · 24 km deep · 43 km away
9. 1.625 km SSW of Ferndale, CaliforniaSat, Oct 21, 6:07 PM PDT · 17509 days ago · 19 km deep · 65 km away
10. 2.85 km E of Redcrest, CaliforniaSat, Oct 21, 8:34 PM PDT · 17508 days ago · 21 km deep · 90 km away
11. 1.6Northern CaliforniaSat, Oct 21, 8:51 PM PDT · 17508 days ago · 17 km deep · 89 km away
12. 1.614 km WSW of Scotia, CaliforniaSun, Oct 22, 2:38 PM PDT · 17508 days ago · 20 km deep · 66 km away
13. 1.918 km SW of Ferndale, CaliforniaSun, Oct 22, 10:17 PM PDT · 17507 days ago · 25 km deep · 59 km away
14. 1.514 km WNW of Fields Landing, CaliforniaMon, Oct 23, 7:39 AM PDT · 17507 days ago · 24 km deep · 31 km away
15. 1.833 km SW of Scotia, CaliforniaMon, Oct 23, 12:56 PM PDT · 17507 days ago · 22 km deep · 76 km away
16. 1.727 km SW of Scotia, CaliforniaMon, Oct 23, 9:08 PM PDT · 17506 days ago · 7 km deep · 78 km away
17. 1.68 km S of Ferndale, CaliforniaTue, Oct 24, 5:06 AM PDT · 17506 days ago · 6 km deep · 60 km away
18. 1.627 km WSW of Ferndale, CaliforniaThu, Oct 26, 3:36 AM PDT · 17504 days ago · 17 km deep · 56 km away
19. 1.958 km WNW of Indianola, CaliforniaThu, Oct 26, 6:09 AM PDT · 17504 days ago · 7 km deep · 20 km away
20. 1.726 km SW of Scotia, CaliforniaThu, Oct 26, 1:34 PM PDT · 17504 days ago · 7 km deep · 79 km away
21. 1.624 km SSW of Ferndale, CaliforniaSat, Oct 28, 1:45 PM PDT · 17502 days ago · 19 km deep · 65 km away
22. 1.736 km WNW of Samoa, CaliforniaSat, Oct 28, 2:33 PM PDT · 17502 days ago · 13 km deep · 6 km away
23. 3.327 km SSW of Ferndale, CaliforniaSat, Oct 28, 9:33 PM PDT · 17501 days ago · 19 km deep · 67 km away
24. 1.727 km SW of Ferndale, CaliforniaSat, Oct 28, 10:00 PM PDT · 17501 days ago · 23 km deep · 66 km away
25. 3.837 km SW of Ferndale, CaliforniaSat, Oct 28, 11:50 PM PDT · 17501 days ago · 23 km deep · 71 km away
26. 2.237 km SW of Ferndale, CaliforniaSat, Oct 28, 11:53 PM PDT · 17501 days ago · 22 km deep · 72 km away
27. 2.136 km SW of Ferndale, CaliforniaSun, Oct 29, 3:02 PM PST · 17501 days ago · 24 km deep · 72 km away
28. 2.117 km WSW of Scotia, CaliforniaSun, Oct 29, 10:18 PM PST · 17500 days ago · 19 km deep · 67 km away
29. 1.624 km SW of Scotia, CaliforniaMon, Oct 30, 2:18 AM PST · 17500 days ago · 26 km deep · 73 km away
30. 1.921 km W of Indianola, CaliforniaMon, Oct 30, 9:50 AM PST · 17500 days ago · 23 km deep · 29 km away
31. 2.63 km WNW of Ferndale, CaliforniaMon, Oct 30, 8:17 PM PST · 17499 days ago · 21 km deep · 49 km away
32. 1.888 km W of Trinidad, CaliforniaTue, Oct 31, 7:44 AM PST · 17499 days ago · 5 km deep · 46 km away
33. 1.625 km WSW of Ferndale, CaliforniaWed, Nov 1, 6:39 PM PST · 17498 days ago · 17 km deep · 55 km away
34. 1.940 km SW of Ferndale, CaliforniaWed, Nov 1, 11:18 PM PST · 17497 days ago · 21 km deep · 71 km away
35. 1.642 km W of Ferndale, CaliforniaThu, Nov 2, 1:34 AM PST · 17497 days ago · 21 km deep · 37 km away
36. 1.724 km SW of Ferndale, CaliforniaThu, Nov 2, 5:48 AM PST · 17497 days ago · 18 km deep · 56 km away
37. 1.625 km SSW of Ferndale, CaliforniaThu, Nov 2, 5:24 PM PST · 17497 days ago · 18 km deep · 66 km away
38. 2.323 km SW of Ferndale, CaliforniaThu, Nov 2, 7:25 PM PST · 17496 days ago · 18 km deep · 58 km away
39. 1.623 km SW of Ferndale, CaliforniaThu, Nov 2, 9:34 PM PST · 17496 days ago · 17 km deep · 57 km away
40. 1.614 km WSW of Scotia, CaliforniaThu, Nov 2, 11:56 PM PST · 17496 days ago · 28 km deep · 68 km away
41. 2.841 km SW of Ferndale, CaliforniaFri, Nov 3, 12:52 AM PST · 17496 days ago · 24 km deep · 70 km away
42. 2.242 km SW of Ferndale, CaliforniaFri, Nov 3, 7:42 AM PST · 17496 days ago · 22 km deep · 70 km away
43. 3.040 km SW of Ferndale, CaliforniaFri, Nov 3, 7:44 AM PST · 17496 days ago · 22 km deep · 69 km away
44. 2.139 km SSW of Ferndale, CaliforniaFri, Nov 3, 8:35 PM PST · 17495 days ago · 14 km deep · 74 km away
45. 1.816 km WSW of Scotia, CaliforniaSat, Nov 4, 8:29 PM PST · 17494 days ago · 20 km deep · 67 km away
46. 1.744 km SW of Ferndale, CaliforniaSat, Nov 4, 9:18 PM PST · 17494 days ago · 17 km deep · 71 km away
47. 2.04 km N of Redcrest, CaliforniaSun, Nov 5, 12:21 AM PST · 17494 days ago · 21 km deep · 82 km away
48. 2.557 km WNW of Samoa, CaliforniaSun, Nov 5, 7:24 PM PST · 17493 days ago · 10 km deep · 14 km away
49. 1.69 km S of Ferndale, CaliforniaMon, Nov 6, 11:30 AM PST · 17493 days ago · 18 km deep · 61 km away
50. 1.743 km SW of Ferndale, CaliforniaMon, Nov 6, 2:12 PM PST · 17493 days ago · 20 km deep · 71 km away
51. 1.731 km SSW of Ferndale, CaliforniaMon, Nov 6, 7:29 PM PST · 17492 days ago · 25 km deep · 71 km away
52. 1.616 km WSW of Scotia, CaliforniaMon, Nov 6, 9:23 PM PST · 17492 days ago · 19 km deep · 67 km away
53. 1.626 km WSW of Ferndale, CaliforniaTue, Nov 7, 2:56 AM PST · 17492 days ago · 17 km deep · 55 km away
54. 1.632 km SSW of Ferndale, CaliforniaTue, Nov 7, 3:05 AM PST · 17492 days ago · 10 km deep · 73 km away
55. 3.162 km WSW of Ferndale, CaliforniaTue, Nov 7, 9:58 AM PST · 17492 days ago · 25 km deep · 65 km away
56. 1.54 km WSW of Weott, CaliforniaTue, Nov 7, 10:46 AM PST · 17492 days ago · 25 km deep · 92 km away
57. 1.863 km WSW of Ferndale, CaliforniaTue, Nov 7, 11:24 AM PST · 17492 days ago · 2 km deep · 65 km away
58. 1.99 km SW of Scotia, CaliforniaTue, Nov 7, 12:30 PM PST · 17492 days ago · 23 km deep · 73 km away
59. 2.019 km SSW of Ferndale, CaliforniaTue, Nov 7, 5:10 PM PST · 17492 days ago · 32 km deep · 63 km away
60. 1.739 km SW of Ferndale, CaliforniaWed, Nov 8, 3:51 AM PST · 17491 days ago · 26 km deep · 72 km away

The first 60 of 138.

Before

1. 2.145 km WSW of Ferndale, CaliforniaWed, Oct 18, 1:14 PM PDT · 17512 days ago · 36 km deep · 64 km away
2. 4.276 km W of Ferndale, CaliforniaSun, Oct 15, 9:23 PM PDT · 17514 days ago · 55 km deep · 65 km away
3. 3.718 km SW of Ferndale, CaliforniaSun, Oct 15, 7:18 PM PDT · 17515 days ago · 23 km deep · 54 km away
4. 1.779 km WSW of Ferndale, CaliforniaSun, Oct 15, 5:46 PM PDT · 17515 days ago · 5 km deep · 73 km away
5. 4.3off the coast of Northern CaliforniaSun, Oct 15, 12:55 PM PDT · 17515 days ago · 56 km deep · 71 km away
6. 2.643 km WNW of Indianola, CaliforniaSun, Oct 15, 12:00 PM PDT · 17515 days ago · 20 km deep · 14 km away
7. 4.1123 km W of Ferndale, CaliforniaSun, Oct 15, 8:36 AM PDT · 17515 days ago · 28 km deep · 95 km away
8. 1.64 km NW of McKinleyville, CaliforniaSun, Oct 15, 5:27 AM PDT · 17515 days ago · 20 km deep · 45 km away
9. 1.69 km S of Ferndale, CaliforniaSun, Oct 15, 5:15 AM PDT · 17515 days ago · 18 km deep · 60 km away
10. 2.381 km W of Big Lagoon, CaliforniaSun, Oct 15, 5:04 AM PDT · 17515 days ago · 5 km deep · 52 km away
11. 2.19 km NNE of Redcrest, CaliforniaSun, Oct 15, 12:32 AM PDT · 17515 days ago · 22 km deep · 81 km away
12. 1.515 km WSW of Burnt Ranch, CaliforniaSat, Oct 14, 11:18 PM PDT · 17515 days ago · 33 km deep · 89 km away
13. 1.923 km SSW of Scotia, CaliforniaSat, Oct 14, 6:59 PM PDT · 17516 days ago · 2 km deep · 82 km away
14. 2.8near the coast of Northern CaliforniaSat, Oct 14, 5:50 PM PDT · 17516 days ago · 22 km deep · 55 km away
15. 1.634 km WSW of Ferndale, CaliforniaSat, Oct 14, 1:21 AM PDT · 17516 days ago · 16 km deep · 52 km away
16. 1.612 km S of Ferndale, CaliforniaFri, Oct 13, 7:19 AM PDT · 17517 days ago · 23 km deep · 63 km away
17. 2.06 km WSW of Samoa, CaliforniaThu, Oct 12, 7:43 PM PDT · 17518 days ago · 24 km deep · 38 km away
18. 1.980 km W of Trinidad, CaliforniaWed, Oct 11, 10:19 PM PDT · 17518 days ago · 5 km deep · 42 km away
19. 2.025 km SSW of Ferndale, CaliforniaWed, Oct 11, 2:27 PM PDT · 17519 days ago · 19 km deep · 67 km away
20. 1.845 km WSW of Ferndale, CaliforniaWed, Oct 11, 3:56 AM PDT · 17519 days ago · 17 km deep · 56 km away

From the USGS Earthquake Hazards Program and its partner networks, event nc1042918. Read Mon, Sep 28, 2026, 2:31 PM UTC.