M1.5 earthquake 30 km WNW of Samoa, California

Magnitude

1.5 (md), micro

Local time

Sat, Aug 19, 1978, 2:21 PM PDT

UTC

1978-08-19 21:21:07 UTC

Depth

18.9 km (11.7 mi), shallow

Epicenter

40.910° N, 124.523° W

Region

California

Tsunami flag

No

Status

Reviewed by a seismologist

Location uncertainty

About 8.9 km horizontally, 1.6 km in depth

Depth from

From location

Station coverage gap

302°, poorly surrounded by stations

Stations used

5

• Manila, CaliforniaPopulation 784. Forecast31 kmWNW
• Eureka, CaliforniaPopulation 27,017. Forecast32 kmWNW
• Chico, CaliforniaPopulation 121,345. Forecast263 kmWNW

After

1. 1.625 km SW of Ferndale, CaliforniaSat, Aug 19, 5:32 PM PDT · 17573 days ago · 18 km deep · 59 km away
2. 2.435 km W of Ferndale, CaliforniaSat, Aug 19, 9:51 PM PDT · 17573 days ago · 24 km deep · 45 km away
3. 2.343 km SW of Ferndale, CaliforniaSun, Aug 20, 3:54 AM PDT · 17573 days ago · 22 km deep · 67 km away
4. 3.328 km SW of Ferndale, CaliforniaSun, Aug 20, 11:42 AM PDT · 17572 days ago · 23 km deep · 55 km away
5. 2.828 km SW of Ferndale, CaliforniaSun, Aug 20, 11:44 AM PDT · 17572 days ago · 27 km deep · 58 km away
6. 2.527 km SW of Ferndale, CaliforniaSun, Aug 20, 1:32 PM PDT · 17572 days ago · 23 km deep · 55 km away
7. 1.625 km SSW of Ferndale, CaliforniaMon, Aug 21, 4:28 AM PDT · 17572 days ago · 18 km deep · 61 km away
8. 1.634 km SSW of Ferndale, CaliforniaMon, Aug 21, 6:52 PM PDT · 17571 days ago · 28 km deep · 67 km away
9. 1.644 km W of Ferndale, CaliforniaTue, Aug 22, 1:43 AM PDT · 17571 days ago · 24 km deep · 43 km away
10. 1.723 km WSW of Ferndale, CaliforniaTue, Aug 22, 11:55 PM PDT · 17570 days ago · 29 km deep · 44 km away
11. 1.641 km W of Ferndale, CaliforniaWed, Aug 23, 1:09 AM PDT · 17570 days ago · 22 km deep · 42 km away
12. 2.233 km SSW of Ferndale, CaliforniaWed, Aug 23, 6:54 AM PDT · 17570 days ago · 19 km deep · 69 km away
13. 1.824 km SW of Ferndale, CaliforniaThu, Aug 24, 12:34 AM PDT · 17569 days ago · 19 km deep · 58 km away
14. 2.835 km WSW of Ferndale, CaliforniaThu, Aug 24, 10:52 PM PDT · 17568 days ago · 20 km deep · 52 km away
15. 1.637 km WSW of Ferndale, CaliforniaFri, Aug 25, 5:17 AM PDT · 17568 days ago · 30 km deep · 54 km away
16. 1.517 km SSW of Ferndale, CaliforniaFri, Aug 25, 10:27 PM PDT · 17567 days ago · 27 km deep · 54 km away
17. 1.813 km SE of Blue Lake, CaliforniaSat, Aug 26, 4:20 AM PDT · 17567 days ago · 22 km deep · 55 km away
18. 2.526 km SW of Ferndale, CaliforniaSat, Aug 26, 10:22 AM PDT · 17567 days ago · 18 km deep · 59 km away
19. 1.713 km NW of Willow Creek, CaliforniaSat, Aug 26, 10:37 AM PDT · 17567 days ago · 22 km deep · 68 km away
20. 1.854 km W of Trinidad, CaliforniaSun, Aug 27, 4:06 AM PDT · 17566 days ago · 8 km deep · 33 km away
21. 2.324 km NE of Hydesville, CaliforniaSun, Aug 27, 7:39 AM PDT · 17566 days ago · 26 km deep · 62 km away
22. 1.60 km SSE of Samoa, CaliforniaSun, Aug 27, 9:05 AM PDT · 17566 days ago · 16 km deep · 31 km away
23. 1.716 km SW of Weott, CaliforniaSun, Aug 27, 5:55 PM PDT · 17565 days ago · 19 km deep · 86 km away
24. 1.72 km E of Loleta, CaliforniaMon, Aug 28, 9:10 PM PDT · 17564 days ago · 18 km deep · 41 km away
25. 2.525 km SW of Ferndale, CaliforniaTue, Aug 29, 2:49 PM PDT · 17563 days ago · 26 km deep · 53 km away
26. 2.220 km SSW of Ferndale, CaliforniaTue, Aug 29, 3:12 PM PDT · 17563 days ago · 31 km deep · 59 km away
27. 2.525 km SSW of Ferndale, CaliforniaWed, Aug 30, 9:04 PM PDT · 17562 days ago · 19 km deep · 61 km away
28. 3.1near the coast of Northern CaliforniaFri, Sep 1, 2:02 AM PDT · 17561 days ago · 21 km deep · 44 km away
29. 1.622 km WSW of Ferndale, CaliforniaFri, Sep 1, 4:49 AM PDT · 17561 days ago · 21 km deep · 44 km away
30. 2.339 km SW of Ferndale, CaliforniaFri, Sep 1, 11:03 AM PDT · 17560 days ago · 13 km deep · 68 km away
31. 1.74 km S of Ferndale, CaliforniaSat, Sep 2, 5:21 AM PDT · 17560 days ago · 25 km deep · 47 km away
32. 1.831 km WSW of Ferndale, CaliforniaSat, Sep 2, 4:55 PM PDT · 17559 days ago · 26 km deep · 51 km away
33. 2.525 km SW of Ferndale, CaliforniaSun, Sep 3, 10:02 AM PDT · 17559 days ago · 27 km deep · 56 km away
34. 2.990 km WSW of Ferndale, CaliforniaSun, Sep 3, 5:43 PM PDT · 17558 days ago · 6 km deep · 88 km away
35. 2.126 km SW of Ferndale, CaliforniaSun, Sep 3, 7:48 PM PDT · 17558 days ago · 18 km deep · 52 km away
36. 2.319 km SW of Ferndale, CaliforniaSun, Sep 3, 7:52 PM PDT · 17558 days ago · 23 km deep · 53 km away
37. 1.69 km S of Ferndale, CaliforniaMon, Sep 4, 4:34 AM PDT · 17558 days ago · 19 km deep · 52 km away
38. 1.523 km W of Indianola, CaliforniaMon, Sep 4, 4:47 AM PDT · 17558 days ago · 24 km deep · 22 km away
39. 1.730 km WNW of Ferndale, CaliforniaMon, Sep 4, 3:15 PM PDT · 17557 days ago · 15 km deep · 32 km away
40. 1.630 km SW of Ferndale, CaliforniaMon, Sep 4, 8:33 PM PDT · 17557 days ago · 24 km deep · 55 km away
41. 3.525 km SSW of Ferndale, CaliforniaTue, Sep 5, 12:13 AM PDT · 17557 days ago · 19 km deep · 61 km away
42. 2.531 km WSW of Ferndale, CaliforniaTue, Sep 5, 8:53 AM PDT · 17557 days ago · 21 km deep · 46 km away
43. 3.033 km WSW of Ferndale, CaliforniaTue, Sep 5, 12:34 PM PDT · 17556 days ago · 25 km deep · 46 km away
44. 1.537 km SSW of Ferndale, CaliforniaTue, Sep 5, 5:05 PM PDT · 17556 days ago · 9 km deep · 70 km away
45. 1.526 km SSW of Ferndale, CaliforniaWed, Sep 6, 7:50 PM PDT · 17555 days ago · 30 km deep · 60 km away
46. 2.4off the coast of Northern CaliforniaThu, Sep 7, 5:59 AM PDT · 17555 days ago · 4 km deep · 83 km away
47. 1.914 km WNW of Fields Landing, CaliforniaThu, Sep 7, 6:24 AM PDT · 17555 days ago · 23 km deep · 21 km away
48. 1.672 km W of Ferndale, CaliforniaThu, Sep 7, 6:50 AM PDT · 17555 days ago · 9 km deep · 69 km away
49. 1.59 km S of Ferndale, CaliforniaThu, Sep 7, 9:45 PM PDT · 17554 days ago · 18 km deep · 51 km away
50. 1.717 km SSW of Ferndale, CaliforniaFri, Sep 8, 12:26 AM PDT · 17554 days ago · 28 km deep · 57 km away
51. 2.837 km SW of Ferndale, CaliforniaFri, Sep 8, 3:35 AM PDT · 17554 days ago · 17 km deep · 67 km away
52. 2.256 km WNW of Indianola, CaliforniaFri, Sep 8, 3:04 PM PDT · 17553 days ago · 5 km deep · 32 km away
53. 1.58 km WNW of Rio Dell, CaliforniaFri, Sep 8, 6:45 PM PDT · 17553 days ago · 5 km deep · 51 km away
54. 2.725 km ENE of Hydesville, CaliforniaSat, Sep 9, 12:51 AM PDT · 17553 days ago · 5 km deep · 64 km away
55. 4.0105 km W of Ferndale, CaliforniaSat, Sep 9, 6:09 PM PDT · 17552 days ago · 47 km deep · 90 km away
56. 3.235 km SW of Ferndale, CaliforniaSun, Sep 10, 12:39 AM PDT · 17552 days ago · 28 km deep · 66 km away
57. 3.240 km SW of Ferndale, CaliforniaSun, Sep 10, 12:43 AM PDT · 17552 days ago · 36 km deep · 68 km away
58. 2.4100 km WSW of Ferndale, CaliforniaSun, Sep 10, 3:05 AM PDT · 17552 days ago · 24 km deep · 95 km away
59. 3.049 km W of Indianola, CaliforniaSun, Sep 10, 5:08 AM PDT · 17552 days ago · 23 km deep · 30 km away
60. 2.769 km WSW of Ferndale, CaliforniaSun, Sep 10, 11:38 AM PDT · 17551 days ago · 17 km deep · 74 km away

The first 60 of 182.

Before

1. 1.610 km S of Ferndale, CaliforniaSat, Aug 19, 12:38 PM PDT · 17573 days ago · 18 km deep · 51 km away
2. 2.824 km SSW of Ferndale, CaliforniaSat, Aug 19, 3:02 AM PDT · 17574 days ago · 19 km deep · 60 km away
3. 2.032 km W of Trinidad, CaliforniaFri, Aug 18, 10:32 PM PDT · 17574 days ago · 15 km deep · 13 km away
4. 1.545 km SW of Ferndale, CaliforniaFri, Aug 18, 9:45 PM PDT · 17574 days ago · 16 km deep · 69 km away
5. 2.0near the coast of Northern CaliforniaThu, Aug 17, 2:23 PM PDT · 17575 days ago · 18 km deep · 57 km away
6. 2.3near the coast of Northern CaliforniaThu, Aug 17, 12:45 PM PDT · 17575 days ago · 19 km deep · 60 km away
7. 1.89 km S of Ferndale, CaliforniaWed, Aug 16, 9:51 PM PDT · 17576 days ago · 19 km deep · 51 km away
8. 1.627 km SW of Ferndale, CaliforniaWed, Aug 16, 7:24 PM PDT · 17576 days ago · 19 km deep · 59 km away
9. 1.515 km SSW of Ferndale, CaliforniaWed, Aug 16, 6:30 PM PDT · 17576 days ago · 7 km deep · 53 km away
10. 1.727 km SSW of Ferndale, CaliforniaWed, Aug 16, 1:59 PM PDT · 17576 days ago · 19 km deep · 61 km away
11. 1.626 km SW of Ferndale, CaliforniaWed, Aug 16, 11:52 AM PDT · 17576 days ago · 19 km deep · 59 km away
12. 3.025 km SSW of Ferndale, CaliforniaWed, Aug 16, 9:51 AM PDT · 17577 days ago · 19 km deep · 61 km away
13. 2.025 km SSW of Ferndale, CaliforniaWed, Aug 16, 7:33 AM PDT · 17577 days ago · 19 km deep · 61 km away
14. 1.523 km SSW of Ferndale, CaliforniaWed, Aug 16, 3:07 AM PDT · 17577 days ago · 20 km deep · 60 km away
15. 1.825 km SSW of Ferndale, CaliforniaWed, Aug 16, 2:39 AM PDT · 17577 days ago · 19 km deep · 60 km away
16. 2.023 km SSW of Ferndale, CaliforniaWed, Aug 16, 2:36 AM PDT · 17577 days ago · 18 km deep · 59 km away
17. 1.626 km SW of Ferndale, CaliforniaWed, Aug 16, 2:29 AM PDT · 17577 days ago · 19 km deep · 58 km away
18. 1.624 km SW of Ferndale, CaliforniaWed, Aug 16, 1:48 AM PDT · 17577 days ago · 20 km deep · 58 km away
19. 2.323 km SSW of Ferndale, CaliforniaWed, Aug 16, 1:36 AM PDT · 17577 days ago · 20 km deep · 60 km away
20. 1.625 km SSW of Ferndale, CaliforniaWed, Aug 16, 1:13 AM PDT · 17577 days ago · 19 km deep · 59 km away

From the USGS Earthquake Hazards Program and its partner networks, event nc1041762. Read Wed, Sep 30, 2026, 5:08 AM UTC.