M3.1 earthquake 19 km SSW of Ferndale, California

Magnitude

3.1 (md), minor

Local time

Tue, Apr 30, 1985, 9:31 AM PDT

UTC

1985-04-30 16:31:19 UTC

Depth

13.8 km (8.6 mi), shallow

Epicenter

40.418° N, 124.354° W

Region

California

Tsunami flag

No

Status

Reviewed by a seismologist

Location uncertainty

About 4.2 km horizontally, 2.3 km in depth

Magnitude uncertainty

±0.23

Depth from

From location

Station coverage gap

301°, poorly surrounded by stations

Stations used

4

• Ferndale, CaliforniaPopulation 1,369. Forecast19 kmSSW
• Fortuna, CaliforniaPopulation 12,000. Forecast26 kmSW
• Chico, CaliforniaPopulation 121,345. Forecast227 kmWNW
• Los Angeles, CaliforniaPopulation 3,820,914. Forecast890 kmNW

After

1. 2.16 km NW of Alderpoint, CaliforniaThu, May 2, 10:12 AM PDT · 15125 days ago · 21 km deep · 63 km away
2. 1.610 km WSW of Rio Dell, CaliforniaThu, May 2, 10:49 AM PDT · 15125 days ago · 18 km deep · 13 km away
3. 2.115 km NW of Shelter Cove, CaliforniaThu, May 2, 10:16 PM PDT · 15124 days ago · 13 km deep · 36 km away
4. 2.115 km WNW of Fields Landing, CaliforniaFri, May 3, 8:57 AM PDT · 15124 days ago · 14 km deep · 41 km away
5. 1.81 km W of Indianola, CaliforniaSat, May 4, 5:21 AM PDT · 15123 days ago · 4 km deep · 31 km away
6. 2.916 km W of Shelter Cove, CaliforniaSat, May 4, 11:47 AM PDT · 15123 days ago · 2 km deep · 44 km away
7. 1.75 km WSW of Scotia, CaliforniaSat, May 4, 5:30 PM PDT · 15122 days ago · 12 km deep · 17 km away
8. 2.344 km SW of Ferndale, CaliforniaMon, May 6, 6:53 PM PDT · 15120 days ago · 21 km deep · 28 km away
9. 2.032 km SSW of Ferndale, CaliforniaTue, May 7, 5:32 PM PDT · 15119 days ago · 4 km deep · 14 km away
10. 2.25 km WSW of Indianola, CaliforniaWed, May 8, 11:28 AM PDT · 15119 days ago · 4 km deep · 28 km away
11. 1.65 km SSE of Benbow, CaliforniaThu, May 9, 7:52 PM PDT · 15117 days ago · 15 km deep · 67 km away
12. 2.326 km W of Samoa, CaliforniaFri, May 10, 11:25 AM PDT · 15117 days ago · 18 km deep · 51 km away
13. 3.119 km SW of Ferndale, CaliforniaSat, May 11, 9:11 AM PDT · 15116 days ago · 25 km deep · 6 km away
14. 4.3104 km W of Ferndale, CaliforniaSun, May 12, 6:55 AM PDT · 15115 days ago · 7 km deep · 95 km away
15. 1.917 km W of Junction City, CaliforniaSun, May 12, 7:40 AM PDT · 15115 days ago · 2 km deep · 98 km away
16. 1.95 km NW of Shelter Cove, CaliforniaMon, May 13, 4:25 AM PDT · 15114 days ago · 16 km deep · 44 km away
17. 3.0off the coast of Northern CaliforniaTue, May 14, 5:56 PM PDT · 15112 days ago · 2 km deep · 68 km away
18. 2.410 km NNE of Shelter Cove, CaliforniaTue, May 14, 10:45 PM PDT · 15112 days ago · 20 km deep · 44 km away
19. 2.630 km SW of Ferndale, CaliforniaWed, May 15, 7:25 PM PDT · 15111 days ago · 17 km deep · 14 km away
20. 3.394 km W of Ferndale, CaliforniaFri, May 17, 4:45 PM PDT · 15109 days ago · 3 km deep · 86 km away
21. 3.911 km W of Indianola, CaliforniaSat, May 18, 5:05 AM PDT · 15109 days ago · 20 km deep · 29 km away
22. 2.586 km W of Ferndale, CaliforniaSun, May 19, 4:18 PM PDT · 15108 days ago · 4 km deep · 77 km away
23. 2.913km SSE of Willow Creek, CATue, May 21, 9:27 AM PDT · 15106 days ago · 13 km deep · 80 km away
24. 2.519 km SSW of Scotia, CaliforniaWed, May 22, 12:35 AM PDT · 15105 days ago · 30 km deep · 15 km away
25. 2.08 km SSW of Scotia, CaliforniaFri, May 24, 6:44 AM PDT · 15103 days ago · -1 km deep · 18 km away
26. 1.610 km SSE of Blue Lake, CaliforniaSat, May 25, 3:13 AM PDT · 15102 days ago · 5 km deep · 55 km away
27. 1.91 km SW of Burnt Ranch, CaliforniaSat, May 25, 7:16 AM PDT · 15102 days ago · 20 km deep · 85 km away
28. 2.14 km SW of Scotia, CaliforniaWed, May 29, 5:09 AM PDT · 15098 days ago · 25 km deep · 18 km away
29. 2.021 km WNW of Indianola, CaliforniaWed, May 29, 9:05 AM PDT · 15098 days ago · 4 km deep · 40 km away
30. 1.69 km SSE of Ferndale, CaliforniaWed, May 29, 10:38 PM PDT · 15097 days ago · 20 km deep · 15 km away
31. 2.7near the coast of Northern CaliforniaFri, May 31, 8:22 AM PDT · 15096 days ago · 4 km deep · 33 km away
32. 2.628 km SW of Ferndale, CaliforniaSun, Jun 2, 4:01 AM PDT · 15094 days ago · 24 km deep · 15 km away
33. 2.152 km SW of Ferndale, CaliforniaSun, Jun 2, 6:25 AM PDT · 15094 days ago · 19 km deep · 36 km away
34. 2.012 km SW of Weott, CaliforniaMon, Jun 3, 6:19 PM PDT · 15092 days ago · 4 km deep · 33 km away
35. 2.315 km ENE of Hydesville, CaliforniaWed, Jun 5, 10:12 AM PDT · 15091 days ago · 19 km deep · 41 km away
36. 2.116 km WSW of Weott, CaliforniaThu, Jun 6, 5:50 AM PDT · 15090 days ago · 4 km deep · 26 km away
37. 3.014 km WSW of Hayfork, CaliforniaSat, Jun 8, 8:57 PM PDT · 15087 days ago · 33 km deep · 87 km away
38. 1.67 km W of Redcrest, CaliforniaMon, Jun 10, 12:13 AM PDT · 15086 days ago · 4 km deep · 27 km away
39. 2.2Northern CaliforniaTue, Jun 11, 3:02 PM PDT · 15085 days ago · 10 km deep · 96 km away
40. 2.05 km WNW of Samoa, CaliforniaWed, Jun 12, 9:20 AM PDT · 15084 days ago · 4 km deep · 47 km away
41. 1.620 km W of Hyampom, CaliforniaThu, Jun 13, 6:59 PM PDT · 15082 days ago · 4 km deep · 59 km away
42. 2.923 km SSW of Ferndale, CaliforniaWed, Jun 19, 11:15 AM PDT · 15077 days ago · 17 km deep · 5 km away
43. 3.328 km SW of Scotia, CaliforniaSun, Jun 23, 4:14 PM PDT · 15073 days ago · 10 km deep · 12 km away
44. 2.510 km NW of Fields Landing, CaliforniaTue, Jun 25, 6:03 PM PDT · 15070 days ago · 26 km deep · 41 km away
45. 2.92 km N of Burnt Ranch, CaliforniaWed, Jun 26, 10:51 AM PDT · 15070 days ago · 20 km deep · 87 km away
46. 2.114 km WNW of Ferndale, CaliforniaThu, Jun 27, 5:21 PM PDT · 15068 days ago · 15 km deep · 23 km away

Before

1. 1.910 km S of Ferndale, CaliforniaMon, Apr 29, 8:02 AM PDT · 15128 days ago · 30 km deep · 11 km away
2. 3.05 km NW of Fields Landing, CaliforniaSat, Apr 27, 9:44 PM PST · 15129 days ago · 23 km deep · 40 km away
3. 1.911 km WSW of Weott, CaliforniaSat, Apr 27, 8:30 PM PST · 15129 days ago · 4 km deep · 32 km away
4. 3.423 km SSW of Scotia, CaliforniaTue, Apr 23, 6:40 AM PST · 15134 days ago · 10 km deep · 17 km away
5. 3.028 km SW of Scotia, CaliforniaTue, Apr 23, 5:59 AM PST · 15134 days ago · 9 km deep · 13 km away
6. 1.78 km SW of Weott, CaliforniaTue, Apr 23, 2:04 AM PST · 15134 days ago · 4 km deep · 36 km away
7. 2.946 km WSW of Ferndale, CaliforniaSun, Apr 21, 1:40 PM PST · 15136 days ago · 4 km deep · 37 km away
8. 1.818 km W of Ferndale, CaliforniaSun, Apr 21, 4:11 AM PST · 15136 days ago · 4 km deep · 18 km away
9. 2.314 km WSW of Weott, CaliforniaFri, Apr 19, 5:12 AM PST · 15138 days ago · 17 km deep · 27 km away
10. 2.763 km WSW of Ferndale, CaliforniaThu, Apr 18, 5:51 PM PST · 15138 days ago · -1 km deep · 54 km away
11. 2.431 km W of Ferndale, CaliforniaWed, Apr 17, 7:55 AM PST · 15140 days ago · 17 km deep · 29 km away
12. 3.441 km WSW of Ferndale, CaliforniaTue, Apr 16, 6:58 AM PST · 15141 days ago · 18 km deep · 28 km away
13. 1.712 km ENE of Redcrest, CaliforniaSun, Apr 14, 2:28 AM PST · 15143 days ago · 24 km deep · 45 km away
14. 3.442 km WSW of Ferndale, CaliforniaSat, Apr 13, 10:55 PM PST · 15143 days ago · 15 km deep · 34 km away
15. 3.837 km SSW of Ferndale, CaliforniaSat, Apr 13, 7:05 AM PST · 15144 days ago · 15 km deep · 19 km away
16. 2.73 km SE of Ferndale, CaliforniaThu, Apr 11, 11:37 PM PST · 15145 days ago · 23 km deep · 18 km away
17. 2.04 km SE of Ferndale, CaliforniaThu, Apr 11, 11:36 PM PST · 15145 days ago · 23 km deep · 18 km away
18. 2.18 km NE of Hydesville, CaliforniaWed, Apr 10, 6:48 PM PST · 15146 days ago · 18 km deep · 35 km away
19. 3.089 km W of Ferndale, CaliforniaWed, Apr 10, 5:01 PM PST · 15146 days ago · 35 km deep · 83 km away
20. 1.83 km WSW of Myers Flat, CaliforniaWed, Apr 10, 3:23 AM PST · 15147 days ago · 5 km deep · 42 km away

From the USGS Earthquake Hazards Program and its partner networks, event nc47752. Read Tue, Sep 29, 2026, 11:06 AM UTC.