M1.5 earthquake 21 km WNW of Samoa, California

Magnitude

1.5 (md), micro

Local time

Mon, Aug 14, 1978, 2:17 AM PDT

UTC

1978-08-14 09:17:16 UTC

Depth

20.4 km (12.7 mi), shallow

Epicenter

40.867° N, 124.429° W

Region

California

Tsunami flag

No

Status

Reviewed by a seismologist

Location uncertainty

About 4.0 km horizontally, 0.9 km in depth

Depth from

From location

Station coverage gap

318°, poorly surrounded by stations

Stations used

5

• Manila, CaliforniaPopulation 784. Forecast22 kmW
• Eureka, CaliforniaPopulation 27,017. Forecast23 kmWNW
• Chico, CaliforniaPopulation 121,345. Forecast254 kmWNW

After

1. 2.498 km W of Ferndale, CaliforniaMon, Aug 14, 11:52 PM PDT · 17577 days ago · 3 km deep · 96 km away
2. 2.627 km SSW of Ferndale, CaliforniaTue, Aug 15, 4:07 AM PDT · 17577 days ago · 13 km deep · 58 km away
3. 2.275 km WSW of Ferndale, CaliforniaTue, Aug 15, 7:01 AM PDT · 17577 days ago · 10 km deep · 79 km away
4. 3.025 km SSW of Ferndale, CaliforniaWed, Aug 16, 12:42 AM PDT · 17576 days ago · 19 km deep · 55 km away
5. 1.826 km SSW of Ferndale, CaliforniaWed, Aug 16, 12:43 AM PDT · 17576 days ago · 20 km deep · 54 km away
6. 3.824 km SSW of Ferndale, CaliforniaWed, Aug 16, 12:45 AM PDT · 17576 days ago · 19 km deep · 55 km away
7. 2.027 km SSW of Ferndale, CaliforniaWed, Aug 16, 12:49 AM PDT · 17576 days ago · 19 km deep · 56 km away
8. 2.025 km SSW of Ferndale, CaliforniaWed, Aug 16, 12:51 AM PDT · 17576 days ago · 20 km deep · 54 km away
9. 1.725 km SSW of Ferndale, CaliforniaWed, Aug 16, 12:53 AM PDT · 17576 days ago · 21 km deep · 54 km away
10. 1.625 km SSW of Ferndale, CaliforniaWed, Aug 16, 12:56 AM PDT · 17576 days ago · 19 km deep · 55 km away
11. 1.625 km SSW of Ferndale, CaliforniaWed, Aug 16, 1:13 AM PDT · 17576 days ago · 19 km deep · 54 km away
12. 2.323 km SSW of Ferndale, CaliforniaWed, Aug 16, 1:36 AM PDT · 17576 days ago · 20 km deep · 54 km away
13. 1.624 km SW of Ferndale, CaliforniaWed, Aug 16, 1:48 AM PDT · 17576 days ago · 20 km deep · 53 km away
14. 1.626 km SW of Ferndale, CaliforniaWed, Aug 16, 2:29 AM PDT · 17576 days ago · 19 km deep · 53 km away
15. 2.023 km SSW of Ferndale, CaliforniaWed, Aug 16, 2:36 AM PDT · 17576 days ago · 18 km deep · 53 km away
16. 1.825 km SSW of Ferndale, CaliforniaWed, Aug 16, 2:39 AM PDT · 17576 days ago · 19 km deep · 55 km away
17. 1.523 km SSW of Ferndale, CaliforniaWed, Aug 16, 3:07 AM PDT · 17576 days ago · 20 km deep · 54 km away
18. 2.025 km SSW of Ferndale, CaliforniaWed, Aug 16, 7:33 AM PDT · 17576 days ago · 19 km deep · 55 km away
19. 3.025 km SSW of Ferndale, CaliforniaWed, Aug 16, 9:51 AM PDT · 17576 days ago · 19 km deep · 55 km away
20. 1.626 km SW of Ferndale, CaliforniaWed, Aug 16, 11:52 AM PDT · 17576 days ago · 19 km deep · 54 km away
21. 1.727 km SSW of Ferndale, CaliforniaWed, Aug 16, 1:59 PM PDT · 17576 days ago · 19 km deep · 56 km away
22. 1.515 km SSW of Ferndale, CaliforniaWed, Aug 16, 6:30 PM PDT · 17575 days ago · 7 km deep · 47 km away
23. 1.627 km SW of Ferndale, CaliforniaWed, Aug 16, 7:24 PM PDT · 17575 days ago · 19 km deep · 54 km away
24. 1.89 km S of Ferndale, CaliforniaWed, Aug 16, 9:51 PM PDT · 17575 days ago · 19 km deep · 44 km away
25. 2.3near the coast of Northern CaliforniaThu, Aug 17, 12:45 PM PDT · 17575 days ago · 19 km deep · 54 km away
26. 2.0near the coast of Northern CaliforniaThu, Aug 17, 2:23 PM PDT · 17574 days ago · 18 km deep · 48 km away
27. 1.545 km SW of Ferndale, CaliforniaFri, Aug 18, 9:45 PM PDT · 17573 days ago · 16 km deep · 66 km away
28. 2.032 km W of Trinidad, CaliforniaFri, Aug 18, 10:32 PM PDT · 17573 days ago · 15 km deep · 20 km away
29. 2.824 km SSW of Ferndale, CaliforniaSat, Aug 19, 3:02 AM PDT · 17573 days ago · 19 km deep · 55 km away
30. 1.610 km S of Ferndale, CaliforniaSat, Aug 19, 12:38 PM PDT · 17573 days ago · 18 km deep · 44 km away
31. 1.530 km WNW of Samoa, CaliforniaSat, Aug 19, 2:21 PM PDT · 17572 days ago · 19 km deep · 9 km away
32. 1.625 km SW of Ferndale, CaliforniaSat, Aug 19, 5:32 PM PDT · 17572 days ago · 18 km deep · 53 km away
33. 2.435 km W of Ferndale, CaliforniaSat, Aug 19, 9:51 PM PDT · 17572 days ago · 24 km deep · 44 km away
34. 2.343 km SW of Ferndale, CaliforniaSun, Aug 20, 3:54 AM PDT · 17572 days ago · 22 km deep · 64 km away
35. 3.328 km SW of Ferndale, CaliforniaSun, Aug 20, 11:42 AM PDT · 17572 days ago · 23 km deep · 51 km away
36. 2.828 km SW of Ferndale, CaliforniaSun, Aug 20, 11:44 AM PDT · 17572 days ago · 27 km deep · 53 km away
37. 2.527 km SW of Ferndale, CaliforniaSun, Aug 20, 1:32 PM PDT · 17572 days ago · 23 km deep · 51 km away
38. 1.625 km SSW of Ferndale, CaliforniaMon, Aug 21, 4:28 AM PDT · 17571 days ago · 18 km deep · 55 km away
39. 1.634 km SSW of Ferndale, CaliforniaMon, Aug 21, 6:52 PM PDT · 17570 days ago · 28 km deep · 62 km away
40. 1.644 km W of Ferndale, CaliforniaTue, Aug 22, 1:43 AM PDT · 17570 days ago · 24 km deep · 44 km away
41. 1.723 km WSW of Ferndale, CaliforniaTue, Aug 22, 11:55 PM PDT · 17569 days ago · 29 km deep · 40 km away
42. 1.641 km W of Ferndale, CaliforniaWed, Aug 23, 1:09 AM PDT · 17569 days ago · 22 km deep · 42 km away
43. 2.233 km SSW of Ferndale, CaliforniaWed, Aug 23, 6:54 AM PDT · 17569 days ago · 19 km deep · 63 km away
44. 1.824 km SW of Ferndale, CaliforniaThu, Aug 24, 12:34 AM PDT · 17568 days ago · 19 km deep · 52 km away
45. 1.94 km NE of Redway, CaliforniaThu, Aug 24, 12:50 AM PDT · 17568 days ago · 5 km deep · 97 km away
46. 2.835 km WSW of Ferndale, CaliforniaThu, Aug 24, 10:52 PM PDT · 17567 days ago · 20 km deep · 50 km away
47. 1.637 km WSW of Ferndale, CaliforniaFri, Aug 25, 5:17 AM PDT · 17567 days ago · 30 km deep · 52 km away
48. 1.94 km S of Phillipsville, CaliforniaFri, Aug 25, 8:15 AM PDT · 17567 days ago · 4 km deep · 95 km away
49. 1.517 km SSW of Ferndale, CaliforniaFri, Aug 25, 10:27 PM PDT · 17566 days ago · 27 km deep · 48 km away
50. 1.813 km SE of Blue Lake, CaliforniaSat, Aug 26, 4:20 AM PDT · 17566 days ago · 22 km deep · 47 km away
51. 2.526 km SW of Ferndale, CaliforniaSat, Aug 26, 10:22 AM PDT · 17566 days ago · 18 km deep · 54 km away
52. 1.713 km NW of Willow Creek, CaliforniaSat, Aug 26, 10:37 AM PDT · 17566 days ago · 22 km deep · 61 km away
53. 1.854 km W of Trinidad, CaliforniaSun, Aug 27, 4:06 AM PDT · 17565 days ago · 8 km deep · 41 km away
54. 2.324 km NE of Hydesville, CaliforniaSun, Aug 27, 7:39 AM PDT · 17565 days ago · 26 km deep · 53 km away
55. 1.60 km SSE of Samoa, CaliforniaSun, Aug 27, 9:05 AM PDT · 17565 days ago · 16 km deep · 22 km away
56. 1.716 km SW of Weott, CaliforniaSun, Aug 27, 5:55 PM PDT · 17564 days ago · 19 km deep · 78 km away
57. 1.72 km E of Loleta, CaliforniaMon, Aug 28, 9:10 PM PDT · 17563 days ago · 18 km deep · 32 km away
58. 2.525 km SW of Ferndale, CaliforniaTue, Aug 29, 2:49 PM PDT · 17562 days ago · 26 km deep · 48 km away
59. 2.220 km SSW of Ferndale, CaliforniaTue, Aug 29, 3:12 PM PDT · 17562 days ago · 31 km deep · 53 km away
60. 2.525 km SSW of Ferndale, CaliforniaWed, Aug 30, 9:04 PM PDT · 17561 days ago · 19 km deep · 55 km away

The first 60 of at least 199.

Before

1. 1.871 km WSW of Ferndale, CaliforniaSun, Aug 13, 7:14 PM PDT · 17578 days ago · 4 km deep · 75 km away
2. 2.922 km SSW of Ferndale, CaliforniaSun, Aug 13, 5:11 PM PDT · 17578 days ago · 29 km deep · 53 km away
3. 2.139 km WSW of Ferndale, CaliforniaSun, Aug 13, 9:27 AM PDT · 17579 days ago · 27 km deep · 55 km away
4. 2.593 km WSW of Ferndale, CaliforniaSat, Aug 12, 2:03 PM PDT · 17580 days ago · 6 km deep · 93 km away
5. 2.823 km SSW of Ferndale, CaliforniaSat, Aug 12, 1:48 PM PDT · 17580 days ago · 30 km deep · 54 km away
6. 1.845 km SW of Ferndale, CaliforniaSat, Aug 12, 3:39 AM PDT · 17580 days ago · 21 km deep · 65 km away
7. 1.832 km SW of Ferndale, CaliforniaFri, Aug 11, 9:48 AM PDT · 17581 days ago · 28 km deep · 52 km away
8. 1.775 km WSW of Ferndale, CaliforniaFri, Aug 11, 8:28 AM PDT · 17581 days ago · 4 km deep · 77 km away
9. 1.610 km S of Ferndale, CaliforniaFri, Aug 11, 1:35 AM PDT · 17581 days ago · 18 km deep · 44 km away
10. 2.726 km SSW of Ferndale, CaliforniaWed, Aug 9, 4:46 AM PDT · 17583 days ago · 19 km deep · 55 km away
11. 1.847 km WNW of Indianola, CaliforniaTue, Aug 8, 8:21 PM PDT · 17583 days ago · 7 km deep · 31 km away
12. 1.523 km NE of Redcrest, CaliforniaTue, Aug 8, 12:57 PM PDT · 17584 days ago · 23 km deep · 66 km away
13. 1.75 km ENE of Redcrest, CaliforniaTue, Aug 8, 5:35 AM PDT · 17584 days ago · 22 km deep · 67 km away
14. 1.69 km S of Ferndale, CaliforniaTue, Aug 8, 3:31 AM PDT · 17584 days ago · 18 km deep · 44 km away
15. 1.831 km SSW of Ferndale, CaliforniaMon, Aug 7, 8:32 PM PDT · 17584 days ago · 19 km deep · 59 km away
16. 2.142 km SW of Ferndale, CaliforniaMon, Aug 7, 6:43 PM PDT · 17584 days ago · 19 km deep · 64 km away
17. 1.613 km WNW of Willow Creek, CaliforniaMon, Aug 7, 12:45 PM PDT · 17585 days ago · 22 km deep · 56 km away
18. 2.36 km S of Ferndale, CaliforniaMon, Aug 7, 8:56 AM PDT · 17585 days ago · 8 km deep · 42 km away
19. 1.58 km SSW of Scotia, CaliforniaMon, Aug 7, 7:03 AM PDT · 17585 days ago · 25 km deep · 56 km away
20. 1.79 km S of Ferndale, CaliforniaSun, Aug 6, 6:17 AM PDT · 17586 days ago · 18 km deep · 44 km away

From the USGS Earthquake Hazards Program and its partner networks, event nc1041634. Read Tue, Sep 29, 2026, 8:42 AM UTC.