M2.0 earthquake 77 km W of Samoa, California

Magnitude

2.0 (Md, duration), micro

Magnitude from

Northern California Seismic System

Local time

Mon, Oct 31, 1977, 10:02 AM PST

UTC

1977-10-31 18:02:53 UTC

Depth

6.2 km (3.9 mi), shallow

Epicenter

40.956° N, 125.089° W

Region

California

Tsunami flag

No

Status

Reviewed by a seismologist

Location uncertainty

About 7.0 km horizontally, 8.9 km in depth

Depth from

From location

Station coverage gap

317°, poorly surrounded by stations

Stations used

7

• Manila, CaliforniaPopulation 784. Forecast79 kmW
• Eureka, CaliforniaPopulation 27,017. Forecast80 kmWNW
• Chico, CaliforniaPopulation 121,345. Forecast307 kmWNW

After

1. 3.124 km SW of Scotia, CaliforniaWed, Nov 2, 6:55 PM PST · 17867 days ago · 22 km deep · 94 km away
2. 3.710 km SW of Scotia, CaliforniaThu, Nov 3, 6:55 PM PST · 17866 days ago · 4 km deep · 95 km away
3. 1.72 km NNE of Samoa, CaliforniaSun, Nov 6, 1:25 PM PST · 17863 days ago · 23 km deep · 78 km away
4. 3.065 km WSW of Ferndale, CaliforniaWed, Nov 9, 5:27 PM PST · 17860 days ago · 8 km deep · 58 km away
5. 2.827 km WSW of Ferndale, CaliforniaThu, Nov 10, 8:42 AM PST · 17859 days ago · 23 km deep · 72 km away
6. 1.928 km WSW of Ferndale, CaliforniaThu, Nov 10, 8:51 AM PST · 17859 days ago · 23 km deep · 72 km away
7. 2.867 km WSW of Ferndale, CaliforniaThu, Nov 10, 10:11 PM PST · 17858 days ago · 5 km deep · 58 km away
8. 1.868 km WSW of Ferndale, CaliforniaFri, Nov 11, 9:34 AM PST · 17858 days ago · 7 km deep · 57 km away
9. 1.912 km SE of Indianola, CaliforniaSun, Nov 13, 9:26 AM PST · 17856 days ago · 21 km deep · 96 km away
10. 1.628 km WSW of Ferndale, CaliforniaMon, Nov 14, 1:13 AM PST · 17855 days ago · 24 km deep · 70 km away
11. 2.418 km WNW of Indianola, CaliforniaMon, Nov 14, 9:57 AM PST · 17855 days ago · 23 km deep · 60 km away
12. 1.531 km WNW of Samoa, CaliforniaFri, Nov 18, 2:26 AM PST · 17851 days ago · 20 km deep · 48 km away
13. 1.815 km W of Ferndale, CaliforniaSat, Nov 19, 3:52 PM PST · 17850 days ago · 20 km deep · 70 km away
14. 2.733 km W of Ferndale, CaliforniaWed, Nov 23, 12:11 PM PST · 17846 days ago · 20 km deep · 58 km away
15. 1.78 km S of Ferndale, CaliforniaThu, Nov 24, 1:03 AM PST · 17845 days ago · 19 km deep · 86 km away
16. 1.625 km SW of Ferndale, CaliforniaThu, Nov 24, 2:26 AM PST · 17845 days ago · 26 km deep · 80 km away
17. 1.644 km WNW of Indianola, CaliforniaThu, Nov 24, 2:50 AM PST · 17845 days ago · 21 km deep · 34 km away
18. 2.427 km WNW of Ferndale, CaliforniaFri, Nov 25, 8:56 PM PST · 17843 days ago · 20 km deep · 54 km away
19. 2.880 km W of Ferndale, CaliforniaSat, Nov 26, 12:12 AM PST · 17843 days ago · 5 km deep · 43 km away
20. 2.329 km SW of Scotia, CaliforniaSat, Nov 26, 10:46 AM PST · 17843 days ago · 21 km deep · 95 km away
21. 1.635 km WSW of Ferndale, CaliforniaSun, Nov 27, 9:57 AM PST · 17842 days ago · 23 km deep · 65 km away
22. 2.530 km WSW of Ferndale, CaliforniaSun, Nov 27, 10:19 AM PST · 17842 days ago · 23 km deep · 69 km away
23. 1.521 km SW of Ferndale, CaliforniaFri, Dec 2, 2:01 AM PST · 17837 days ago · 24 km deep · 76 km away
24. 2.027 km SW of Scotia, CaliforniaFri, Dec 2, 6:49 AM PST · 17837 days ago · 7 km deep · 99 km away
25. 2.67 km NE of Westhaven-Moonstone, CaliforniaFri, Dec 2, 11:26 AM PST · 17837 days ago · 18 km deep · 90 km away
26. 2.78 km WSW of Rio Dell, CaliforniaFri, Dec 2, 3:49 PM PST · 17837 days ago · 20 km deep · 91 km away
27. 2.118 km SW of Scotia, CaliforniaFri, Dec 2, 5:53 PM PST · 17837 days ago · 4 km deep · 96 km away
28. 1.824 km SW of Scotia, CaliforniaSat, Dec 3, 8:07 AM PST · 17836 days ago · 6 km deep · 95 km away
29. 3.237 km W of Big Lagoon, CaliforniaSun, Dec 4, 9:45 PM PST · 17834 days ago · 16 km deep · 49 km away
30. 1.856 km WNW of Samoa, CaliforniaSun, Dec 11, 3:28 AM PST · 17828 days ago · 2 km deep · 21 km away
31. 1.837 km W of Ferndale, CaliforniaSun, Dec 11, 1:00 PM PST · 17828 days ago · 33 km deep · 57 km away
32. 2.016 km S of Ferndale, CaliforniaThu, Dec 15, 6:10 PM PST · 17824 days ago · 20 km deep · 90 km away
33. 2.6127 km W of Trinidad, CaliforniaSun, Dec 18, 4:46 AM PST · 17821 days ago · 5 km deep · 53 km away
34. 3.531 km W of Big Lagoon, CaliforniaMon, Dec 19, 2:07 PM PST · 17820 days ago · 22 km deep · 54 km away
35. 2.538 km W of Ferndale, CaliforniaSun, Dec 25, 7:35 PM PST · 17814 days ago · 20 km deep · 55 km away
36. 3.631 km SW of Ferndale, CaliforniaMon, Dec 26, 11:23 AM PST · 17813 days ago · 25 km deep · 84 km away
37. 1.822 km SSW of Ferndale, CaliforniaTue, Dec 27, 7:23 AM PST · 17812 days ago · 26 km deep · 86 km away
38. 1.822 km SW of Ferndale, CaliforniaTue, Dec 27, 8:51 AM PST · 17812 days ago · 26 km deep · 77 km away
39. 1.765 km W of Ferndale, CaliforniaTue, Dec 27, 6:25 PM PST · 17812 days ago · 7 km deep · 53 km away
40. 2.032 km SW of Ferndale, CaliforniaTue, Dec 27, 7:21 PM PST · 17812 days ago · 24 km deep · 86 km away
41. 2.015 km SSW of Ferndale, CaliforniaThu, Dec 29, 10:27 AM PST · 17810 days ago · 27 km deep · 85 km away
42. 4.166 km WNW of Ferndale, CaliforniaThu, Dec 29, 11:25 PM PST · 17809 days ago · 4 km deep · 25 km away
43. 1.826 km WNW of Ferndale, CaliforniaFri, Dec 30, 1:48 AM PST · 17809 days ago · 4 km deep · 56 km away

Before

1. 3.388 km WNW of Samoa, CaliforniaFri, Oct 28, 11:41 PM PDT · 17871 days ago · 5 km deep · 11 km away
2. 1.930 km WSW of Ferndale, CaliforniaFri, Oct 28, 12:53 PM PDT · 17872 days ago · 21 km deep · 64 km away
3. 2.338 km SW of Ferndale, CaliforniaThu, Oct 27, 3:06 PM PDT · 17873 days ago · 19 km deep · 83 km away
4. 3.175 km W of Ferndale, CaliforniaThu, Oct 27, 6:03 AM PDT · 17873 days ago · 4 km deep · 52 km away
5. 2.329 km SW of Ferndale, CaliforniaThu, Oct 27, 12:46 AM PDT · 17873 days ago · 19 km deep · 81 km away
6. 2.028 km SW of Ferndale, CaliforniaWed, Oct 26, 9:51 PM PDT · 17873 days ago · 24 km deep · 76 km away
7. 1.69 km S of Ferndale, CaliforniaSat, Oct 22, 10:56 AM PDT · 17878 days ago · -1 km deep · 86 km away
8. 3.237 km SW of Ferndale, CaliforniaFri, Oct 21, 12:00 AM PDT · 17879 days ago · 23 km deep · 87 km away
9. 1.616 km SSW of Ferndale, CaliforniaWed, Oct 19, 12:43 PM PDT · 17881 days ago · 18 km deep · 85 km away
10. 1.513 km SW of Ferndale, CaliforniaMon, Oct 17, 5:05 PM PDT · 17883 days ago · 21 km deep · 80 km away
11. 1.64 km N of Fortuna, CaliforniaSun, Oct 16, 7:47 AM PDT · 17884 days ago · 21 km deep · 87 km away
12. 3.033 km SW of Ferndale, CaliforniaSat, Oct 15, 8:42 AM PDT · 17885 days ago · 24 km deep · 76 km away
13. 2.5142 km W of Trinidad, CaliforniaFri, Oct 14, 8:11 PM PDT · 17886 days ago · 6 km deep · 67 km away
14. 2.033 km SW of Ferndale, CaliforniaFri, Oct 14, 4:54 PM PDT · 17886 days ago · 28 km deep · 75 km away
15. 2.42 km WSW of Loleta, CaliforniaFri, Oct 14, 6:22 AM PDT · 17886 days ago · 19 km deep · 78 km away
16. 1.930 km W of Indianola, CaliforniaFri, Oct 14, 2:28 AM PDT · 17886 days ago · 23 km deep · 51 km away
17. 2.3near the coast of Northern CaliforniaThu, Oct 13, 9:27 AM PDT · 17887 days ago · 21 km deep · 51 km away
18. 3.574 km W of Ferndale, CaliforniaSun, Oct 9, 9:04 PM PDT · 17890 days ago · 6 km deep · 52 km away
19. 1.527 km SW of Ferndale, CaliforniaSun, Oct 9, 8:48 PM PDT · 17891 days ago · 23 km deep · 82 km away
20. 2.142 km W of Ferndale, CaliforniaSun, Oct 9, 3:35 AM PDT · 17891 days ago · 25 km deep · 49 km away

From the USGS Earthquake Hazards Program and its partner networks, event nc1037492. Read Sat, Oct 3, 2026, 3:25 PM UTC.