M2.3 earthquake 4 km WSW of Chico, California

Magnitude

2.3 (md), micro

Local time

Fri, Oct 25, 1985, 1:48 PM PDT

UTC

1985-10-25 20:48:13 UTC

Depth

22.1 km (13.7 mi), shallow

Epicenter

39.712° N, 121.890° W

Region

California

Tsunami flag

No

Status

Reviewed by a seismologist

Location uncertainty

About 1.9 km horizontally, 0.6 km in depth

Magnitude uncertainty

±0.19

Depth from

From location

Station coverage gap

284°, poorly surrounded by stations

Stations used

12

• Chico, CaliforniaPopulation 121,345. Forecast5 kmWSW
• Los Angeles, CaliforniaPopulation 3,820,914. Forecast708 kmNNW

After

1. 1.527 km NNE of Potter Valley, CaliforniaFri, Oct 25, 6:59 PM PDT · 14942 days ago · 9 km deep · 94 km away
2. 1.65 km W of Arbuckle, CaliforniaSun, Oct 27, 9:31 AM PST · 14940 days ago · 8 km deep · 81 km away
3. 1.718 km NNE of Nice, CaliforniaSun, Oct 27, 12:14 PM PST · 14940 days ago · 10 km deep · 88 km away
4. 1.910 km WSW of Arbuckle, CaliforniaSun, Oct 27, 8:39 PM PST · 14940 days ago · 13 km deep · 86 km away
5. 1.913 km E of Mineral, CaliforniaTue, Oct 29, 4:52 PM PST · 14938 days ago · 3 km deep · 82 km away
6. 2.418 km E of Potter Valley, CaliforniaFri, Nov 1, 1:43 AM PST · 14935 days ago · 6 km deep · 95 km away
7. 2.05 km SSE of Red Bluff, CaliforniaFri, Nov 1, 6:10 AM PST · 14935 days ago · 6 km deep · 54 km away
8. 1.64 km SSW of Prattville, CaliforniaSun, Nov 3, 3:24 AM PST · 14933 days ago · 6 km deep · 80 km away
9. 3.30 km WSW of Tehama, CaliforniaSun, Nov 3, 5:02 AM PST · 14933 days ago · 71 km deep · 40 km away
10. 1.714 km NE of Potter Valley, CaliforniaMon, Nov 4, 9:03 AM PST · 14932 days ago · 6 km deep · 99 km away
11. 2.025 km W of Paskenta, CaliforniaThu, Nov 7, 5:00 AM PST · 14929 days ago · -1 km deep · 84 km away
12. 1.89 km W of Lake Almanor West, CaliforniaFri, Nov 8, 11:13 PM PST · 14927 days ago · 10 km deep · 75 km away
13. 1.716 km WSW of Durham, CaliforniaSat, Nov 9, 3:19 AM PST · 14927 days ago · 5 km deep · 17 km away
14. 1.828 km W of Paskenta, CaliforniaMon, Nov 11, 5:25 AM PST · 14925 days ago · 15 km deep · 88 km away
15. 1.810 km NNE of Mineral, CaliforniaMon, Nov 11, 1:48 PM PST · 14925 days ago · 7 km deep · 85 km away
16. 1.910 km NNE of Mineral, CaliforniaMon, Nov 11, 1:55 PM PST · 14925 days ago · 6 km deep · 85 km away
17. 1.65 km W of Robbins, CaliforniaTue, Nov 12, 1:40 PM PST · 14924 days ago · 2 km deep · 94 km away
18. 1.630 km ENE of Covelo, CaliforniaWed, Nov 13, 3:41 AM PST · 14923 days ago · 16 km deep · 92 km away
19. 3.08 km WSW of Paradise, CaliforniaFri, Nov 15, 3:11 AM PST · 14921 days ago · 28 km deep · 15 km away
20. 2.77 km ENE of Nord, CaliforniaSat, Nov 16, 10:24 AM PST · 14920 days ago · 14 km deep · 10 km away
21. 1.98 km W of Lodoga, CaliforniaSun, Nov 17, 6:48 PM PST · 14919 days ago · 4 km deep · 75 km away
22. 1.726 km WNW of Paskenta, CaliforniaTue, Nov 19, 11:46 AM PST · 14917 days ago · -1 km deep · 86 km away
23. 2.36 km ENE of Nord, CaliforniaWed, Nov 20, 10:01 AM PST · 14916 days ago · 18 km deep · 10 km away
24. 1.915 km W of Manton, CaliforniaSat, Nov 23, 8:49 PM PST · 14913 days ago · 28 km deep · 81 km away
25. 2.026 km NE of Potter Valley, CaliforniaSun, Nov 24, 10:08 PM PST · 14911 days ago · 7 km deep · 88 km away
26. 1.62 km NNW of Greenville, CaliforniaMon, Nov 25, 3:32 PM PST · 14911 days ago · 0 km deep · 93 km away
27. 2.334 km NW of Paskenta, CaliforniaWed, Nov 27, 1:35 AM PST · 14909 days ago · 8 km deep · 92 km away
28. 1.612 km NE of Clearlake, CaliforniaWed, Nov 27, 4:37 AM PST · 14909 days ago · 6 km deep · 93 km away
29. 2.321 km ENE of Clearlake, CaliforniaFri, Nov 29, 12:48 AM PST · 14907 days ago · 6 km deep · 86 km away
30. 2.620 km ENE of Clearlake, CaliforniaFri, Nov 29, 10:32 AM PST · 14907 days ago · 0 km deep · 89 km away
31. 1.930 km WNW of Paskenta, CaliforniaFri, Nov 29, 9:13 PM PST · 14907 days ago · 1 km deep · 90 km away
32. 1.712 km SSW of Lake Almanor West, CaliforniaSun, Dec 1, 12:38 AM PST · 14905 days ago · 2 km deep · 70 km away
33. 3.05 km S of Millville, CaliforniaMon, Dec 2, 9:47 AM PST · 14904 days ago · 4 km deep · 91 km away
34. 1.614 km E of Willows, CaliforniaFri, Dec 6, 10:33 PM PST · 14899 days ago · 13 km deep · 22 km away
35. 2.55 km WNW of Plumas Eureka (historical), CaliforniaTue, Dec 10, 9:42 AM PST · 14896 days ago · 2 km deep · 97 km away
36. 1.74 km WNW of Greenville, CaliforniaThu, Dec 12, 2:27 PM PST · 14894 days ago · 0 km deep · 90 km away
37. 2.113 km NNE of Mineral, CaliforniaFri, Dec 13, 10:22 PM PST · 14892 days ago · 3 km deep · 89 km away
38. 1.916 km NE of Lucerne, CaliforniaSun, Dec 15, 1:53 PM PST · 14891 days ago · 5 km deep · 88 km away
39. 2.33 km SE of Canyondam, CaliforniaMon, Dec 16, 7:53 PM PST · 14890 days ago · 4 km deep · 87 km away
40. 1.624 km WNW of Paskenta, CaliforniaWed, Dec 18, 10:10 PM PST · 14887 days ago · 4 km deep · 84 km away
41. 2.526 km W of Paskenta, CaliforniaMon, Dec 23, 4:21 PM PST · 14883 days ago · -1 km deep · 86 km away
42. 1.722 km ENE of Potter Valley, CaliforniaTue, Dec 24, 1:15 AM PST · 14882 days ago · 10 km deep · 91 km away
43. 1.53 km N of Lake Almanor West, CaliforniaTue, Dec 24, 9:43 AM PST · 14882 days ago · 5 km deep · 85 km away
44. 1.61 km NW of Lake Almanor West, CaliforniaTue, Dec 24, 9:59 AM PST · 14882 days ago · 2 km deep · 83 km away

Before

1. 2.410 km SSE of Hamilton City, CaliforniaThu, Oct 24, 10:21 PM PDT · 14943 days ago · 21 km deep · 9 km away
2. 1.923 km WSW of Williams, CaliforniaThu, Oct 24, 2:00 PM PDT · 14943 days ago · 1 km deep · 84 km away
3. 2.811 km W of La Porte, CaliforniaThu, Oct 24, 5:59 AM PDT · 14943 days ago · 11 km deep · 66 km away
4. 2.25 km NNW of Belden, CaliforniaTue, Oct 22, 9:04 AM PDT · 14945 days ago · 8 km deep · 65 km away
5. 2.34 km SSE of Nevada City, CaliforniaSun, Oct 20, 6:40 AM PDT · 14947 days ago · 11 km deep · 94 km away
6. 1.59 km NW of Chester, CaliforniaSun, Oct 20, 4:22 AM PDT · 14947 days ago · 8 km deep · 89 km away
7. 1.614 km NNW of Mineral, CaliforniaSun, Oct 20, 4:21 AM PDT · 14947 days ago · 4 km deep · 87 km away
8. 1.514 km NNE of Mineral, CaliforniaSun, Oct 20, 4:19 AM PDT · 14947 days ago · 12 km deep · 90 km away
9. 3.09 km WNW of Chester, CaliforniaSat, Oct 19, 3:20 AM PDT · 14948 days ago · 0 km deep · 85 km away
10. 2.03 km WNW of Greenville, CaliforniaFri, Oct 18, 2:07 PM PDT · 14949 days ago · 0 km deep · 91 km away
11. 1.84 km S of Oroville East, CaliforniaFri, Oct 18, 5:08 AM PDT · 14949 days ago · 0 km deep · 44 km away
12. 1.74 km SE of Palermo, CaliforniaMon, Oct 14, 1:58 PM PDT · 14953 days ago · 6 km deep · 47 km away
13. 1.818 km E of Potter Valley, CaliforniaMon, Oct 14, 1:57 PM PDT · 14953 days ago · 6 km deep · 96 km away
14. 2.26 km W of Mineral, CaliforniaMon, Oct 14, 12:20 PM PDT · 14953 days ago · 2 km deep · 73 km away
15. 1.820 km ENE of Clearlake, CaliforniaMon, Oct 14, 4:34 AM PDT · 14953 days ago · 6 km deep · 87 km away
16. 1.631 km WNW of Paskenta, CaliforniaMon, Oct 14, 1:51 AM PDT · 14953 days ago · 10 km deep · 90 km away
17. 2.610 km ENE of Artois, CaliforniaSat, Oct 12, 11:06 PM PDT · 14954 days ago · 22 km deep · 18 km away
18. 2.03 km ENE of Canyondam, CaliforniaWed, Oct 9, 5:37 PM PDT · 14958 days ago · 3 km deep · 90 km away
19. 1.814 km WNW of Cohasset, CaliforniaWed, Oct 9, 4:10 PM PDT · 14958 days ago · 5 km deep · 31 km away
20. 2.19 km NE of Vina, CaliforniaTue, Oct 1, 4:42 PM PDT · 14966 days ago · 0 km deep · 32 km away

From the USGS Earthquake Hazards Program and its partner networks, event nc57664. Read Tue, Sep 22, 2026, 5:28 PM UTC.