M1.8 earthquake 35 km W of Ferndale, California

Magnitude

1.8 (Md, duration), micro

Magnitude from

Northern California Seismic System

Local time

Sun, Feb 20, 1977, 8:51 PM PST

UTC

1977-02-21 04:51:56 UTC

Depth

20.8 km (12.9 mi), shallow

Epicenter

40.616° N, 124.680° W

Region

California

Tsunami flag

No

Status

Reviewed by a seismologist

Location uncertainty

About 2.7 km horizontally, 0.5 km in depth

Depth from

From location

Station coverage gap

283°, poorly surrounded by stations

Stations used

10

• Ferndale, CaliforniaPopulation 1,369. Forecast35 kmW
• Fortuna, CaliforniaPopulation 12,000. Forecast44 kmW
• Chico, CaliforniaPopulation 121,345. Forecast261 kmWNW

After

1. 2.563 km WSW of Ferndale, CaliforniaSun, Feb 20, 10:34 PM PST · 18122 days ago · 33 km deep · 32 km away
2. 4.431 km W of Ferndale, CaliforniaMon, Feb 21, 4:57 PM PST · 18121 days ago · 22 km deep · 4 km away
3. 1.941 km W of Ferndale, CaliforniaMon, Feb 21, 7:02 PM PST · 18121 days ago · 20 km deep · 7 km away
4. 1.830 km WNW of Ferndale, CaliforniaTue, Feb 22, 1:44 AM PST · 18120 days ago · 20 km deep · 9 km away
5. 1.819 km WSW of Ferndale, CaliforniaThu, Feb 24, 12:40 AM PST · 18118 days ago · 19 km deep · 23 km away
6. 3.027 km SW of Ferndale, CaliforniaThu, Feb 24, 7:58 PM PST · 18118 days ago · 26 km deep · 26 km away
7. 2.2near the coast of Northern CaliforniaSat, Feb 26, 5:44 PM PST · 18116 days ago · 22 km deep · 8 km away
8. 1.622 km SW of Ferndale, CaliforniaTue, Mar 1, 1:46 AM PST · 18113 days ago · 24 km deep · 30 km away
9. 1.824 km SE of Blue Lake, CaliforniaFri, Mar 4, 3:39 PM PST · 18110 days ago · 22 km deep · 74 km away
10. 1.73 km S of Scotia, CaliforniaSun, Mar 6, 3:56 AM PST · 18108 days ago · 8 km deep · 53 km away
11. 2.246 km WNW of Fields Landing, CaliforniaSun, Mar 6, 4:04 PM PST · 18108 days ago · 23 km deep · 26 km away
12. 1.7near the coast of Northern CaliforniaMon, Mar 7, 7:26 PM PST · 18107 days ago · 18 km deep · 31 km away
13. 2.137 km WSW of Ferndale, CaliforniaTue, Mar 8, 3:25 AM PST · 18106 days ago · 27 km deep · 21 km away
14. 2.688 km W of Trinidad, CaliforniaTue, Mar 8, 1:38 PM PST · 18106 days ago · 6 km deep · 68 km away
15. 1.516 km SSW of Ferndale, CaliforniaSat, Mar 12, 1:13 PM PST · 18102 days ago · 30 km deep · 33 km away
16. 1.924 km W of Hyampom, CaliforniaTue, Mar 15, 2:19 PM PST · 18099 days ago · 7 km deep · 79 km away
17. 1.525 km W of Hyampom, CaliforniaTue, Mar 15, 2:20 PM PST · 18099 days ago · 8 km deep · 78 km away
18. 2.054 km W of Ferndale, CaliforniaWed, Mar 16, 11:19 PM PST · 18098 days ago · 42 km deep · 19 km away
19. 2.214 km SSW of Mad River, CaliforniaThu, Mar 17, 1:22 PM PST · 18097 days ago · 28 km deep · 100 km away
20. 1.618 km W of Ferndale, CaliforniaSat, Mar 19, 4:37 AM PST · 18095 days ago · 21 km deep · 18 km away
21. 2.623 km SW of Ferndale, CaliforniaSun, Mar 20, 6:20 PM PST · 18094 days ago · 23 km deep · 24 km away
22. 2.410 km WNW of Ferndale, CaliforniaMon, Mar 21, 1:45 AM PST · 18093 days ago · 24 km deep · 25 km away
23. 1.58 km NNW of Redcrest, CaliforniaMon, Mar 21, 3:02 PM PST · 18093 days ago · 28 km deep · 62 km away
24. 2.668 km W of Ferndale, CaliforniaTue, Mar 22, 6:30 AM PST · 18092 days ago · 5 km deep · 35 km away
25. 2.132 km W of Ferndale, CaliforniaWed, Mar 23, 2:16 PM PST · 18091 days ago · 31 km deep · 4 km away
26. 2.145 km WSW of Ferndale, CaliforniaFri, Mar 25, 5:23 AM PST · 18089 days ago · 14 km deep · 26 km away
27. 2.050 km W of Indianola, CaliforniaSun, Mar 27, 3:03 PM PST · 18087 days ago · 25 km deep · 18 km away
28. 1.711 km NNW of Mad River, CaliforniaSun, Mar 27, 3:33 PM PST · 18087 days ago · 2 km deep · 94 km away
29. 2.617 km E of Big Lagoon, CaliforniaTue, Mar 29, 4:48 AM PST · 18085 days ago · 21 km deep · 87 km away
30. 2.511 km W of Samoa, CaliforniaTue, Mar 29, 5:52 PM PST · 18085 days ago · 25 km deep · 37 km away
31. 1.611 km NNW of Mad River, CaliforniaTue, Mar 29, 10:41 PM PST · 18085 days ago · 2 km deep · 94 km away
32. 2.419 km SW of Ferndale, CaliforniaWed, Mar 30, 8:19 PM PST · 18084 days ago · 23 km deep · 25 km away
33. 2.116 km W of Samoa, CaliforniaThu, Mar 31, 7:22 PM PST · 18083 days ago · 22 km deep · 34 km away
34. 3.610 km NE of Hydesville, CaliforniaFri, Apr 1, 10:09 PM PST · 18082 days ago · 22 km deep · 57 km away
35. 2.711 km NE of Hydesville, CaliforniaSat, Apr 2, 2:13 AM PST · 18081 days ago · 22 km deep · 58 km away
36. 3.136 km WNW of Big Lagoon, CaliforniaSat, Apr 2, 6:37 PM PST · 18081 days ago · 17 km deep · 70 km away
37. 3.279 km W of Ferndale, CaliforniaSat, Apr 2, 11:35 PM PST · 18081 days ago · 5 km deep · 47 km away
38. 3.011 km NE of Hydesville, CaliforniaSun, Apr 3, 1:37 AM PST · 18080 days ago · 21 km deep · 58 km away
39. 1.919 km W of Ferndale, CaliforniaSun, Apr 3, 1:21 PM PST · 18080 days ago · 20 km deep · 16 km away
40. 3.023 km WSW of Ferndale, CaliforniaMon, Apr 4, 12:25 AM PST · 18080 days ago · 22 km deep · 22 km away
41. 1.53 km SW of Mad River, CaliforniaMon, Apr 4, 1:57 AM PST · 18079 days ago · 28 km deep · 99 km away
42. 1.74 km WSW of Scotia, CaliforniaMon, Apr 4, 7:39 AM PST · 18079 days ago · 23 km deep · 48 km away
43. 2.627 km SSW of Ferndale, CaliforniaMon, Apr 4, 5:46 PM PST · 18079 days ago · 27 km deep · 35 km away
44. 1.517 km SSE of Blue Lake, CaliforniaMon, Apr 4, 10:02 PM PST · 18079 days ago · 24 km deep · 69 km away
45. 1.526 km SW of Ferndale, CaliforniaWed, Apr 6, 10:25 AM PST · 18077 days ago · 19 km deep · 25 km away
46. 2.978 km W of Trinidad, CaliforniaThu, Apr 7, 2:03 AM PST · 18076 days ago · 9 km deep · 59 km away
47. 3.087 km W of Trinidad, CaliforniaThu, Apr 7, 2:07 AM PST · 18076 days ago · 4 km deep · 67 km away
48. 1.845 km WNW of Indianola, CaliforniaThu, Apr 7, 3:10 AM PST · 18076 days ago · 20 km deep · 19 km away
49. 1.77 km W of Rio Dell, CaliforniaThu, Apr 7, 11:43 AM PST · 18076 days ago · 18 km deep · 43 km away
50. 1.832 km WSW of Ferndale, CaliforniaThu, Apr 7, 9:13 PM PST · 18076 days ago · 21 km deep · 23 km away
51. 2.040 km WSW of Ferndale, CaliforniaSat, Apr 9, 10:24 AM PST · 18074 days ago · 17 km deep · 26 km away
52. 3.039 km WSW of Ferndale, CaliforniaSun, Apr 10, 2:23 AM PST · 18073 days ago · 19 km deep · 15 km away
53. 4.149 km WSW of Ferndale, CaliforniaMon, Apr 11, 3:48 PM PST · 18072 days ago · 28 km deep · 23 km away
54. 3.550 km WSW of Ferndale, CaliforniaMon, Apr 11, 3:53 PM PST · 18072 days ago · 25 km deep · 24 km away
55. 1.715 km NE of Myers Flat, CaliforniaWed, Apr 13, 11:00 AM PST · 18070 days ago · 27 km deep · 85 km away
56. 2.34 km ESE of Pine Hills, CaliforniaThu, Apr 14, 3:39 PM PST · 18069 days ago · 24 km deep · 50 km away
57. 2.730 km SW of Ferndale, CaliforniaFri, Apr 15, 1:01 AM PST · 18068 days ago · 28 km deep · 24 km away
58. 2.528 km SSW of Ferndale, CaliforniaFri, Apr 15, 6:20 PM PST · 18068 days ago · 19 km deep · 40 km away
59. 1.84 km SW of Indianola, CaliforniaFri, Apr 15, 11:13 PM PST · 18068 days ago · 23 km deep · 35 km away
60. 2.031 km SW of Ferndale, CaliforniaSat, Apr 16, 3:13 PM PST · 18067 days ago · 23 km deep · 33 km away

The first 60 of 65.

Before

1. 1.720 km WSW of Scotia, CaliforniaFri, Feb 18, 10:33 PM PST · 18124 days ago · 30 km deep · 40 km away
2. 1.852 km W of Indianola, CaliforniaThu, Feb 17, 1:28 PM PST · 18125 days ago · 18 km deep · 22 km away
3. 3.565 km WSW of Ferndale, CaliforniaThu, Feb 17, 1:58 AM PST · 18125 days ago · 23 km deep · 36 km away
4. 2.629 km SW of Ferndale, CaliforniaWed, Feb 16, 7:47 PM PST · 18126 days ago · 18 km deep · 26 km away
5. 3.328 km SSW of Scotia, CaliforniaWed, Feb 16, 6:19 PM PST · 18126 days ago · 11 km deep · 53 km away
6. 1.631 km SW of Ferndale, CaliforniaWed, Feb 16, 5:32 PM PST · 18126 days ago · 17 km deep · 24 km away
7. 2.377 km W of Trinidad, CaliforniaWed, Feb 16, 6:41 AM PST · 18126 days ago · 4 km deep · 67 km away
8. 2.522 km WSW of Weott, CaliforniaWed, Feb 16, 3:48 AM PST · 18126 days ago · 4 km deep · 62 km away
9. 2.74 km NE of Arcata, CaliforniaTue, Feb 15, 10:33 AM PST · 18127 days ago · 20 km deep · 62 km away
10. 2.353 km WNW of Ferndale, CaliforniaMon, Feb 14, 1:56 PM PST · 18128 days ago · 4 km deep · 19 km away
11. 1.626 km W of Hyampom, CaliforniaSun, Feb 13, 9:59 AM PST · 18129 days ago · 44 km deep · 78 km away
12. 2.424 km W of Ferndale, CaliforniaFri, Feb 11, 8:46 PM PST · 18131 days ago · 21 km deep · 12 km away
13. 1.524 km SW of Ferndale, CaliforniaFri, Feb 11, 7:20 AM PST · 18131 days ago · 19 km deep · 26 km away
14. 1.512 km WSW of Ferndale, CaliforniaThu, Feb 10, 10:26 AM PST · 18132 days ago · 21 km deep · 24 km away
15. 1.526 km SW of Ferndale, CaliforniaThu, Feb 10, 6:28 AM PST · 18132 days ago · 26 km deep · 26 km away
16. 2.55 km NW of Alderpoint, CaliforniaTue, Feb 8, 4:31 PM PST · 18134 days ago · 4 km deep · 98 km away
17. 2.210 km WSW of Ferndale, CaliforniaTue, Feb 8, 2:25 PM PST · 18134 days ago · 22 km deep · 27 km away
18. 2.141 km SW of Ferndale, CaliforniaTue, Feb 8, 7:38 AM PST · 18134 days ago · 11 km deep · 39 km away
19. 2.356 km W of Trinidad, CaliforniaMon, Feb 7, 1:04 PM PST · 18135 days ago · 5 km deep · 52 km away
20. 2.145 km SW of Ferndale, CaliforniaSun, Feb 6, 7:33 AM PST · 18136 days ago · 17 km deep · 33 km away

From the USGS Earthquake Hazards Program and its partner networks, event nc1034049. Read Sat, Oct 3, 2026, 8:02 PM UTC.