M1.5 earthquake 7 km E of Williams, California

Magnitude

1.5 (md), micro

Local time

Tue, May 21, 1985, 7:57 AM PDT

UTC

1985-05-21 14:57:12 UTC

Depth

3.5 km (2.2 mi), shallow

Epicenter

39.155° N, 122.061° W

Region

California

Tsunami flag

No

Status

Reviewed by a seismologist

Location uncertainty

About 1.0 km horizontally, 7.6 km in depth

Magnitude uncertainty

±0.22

Depth from

From location

Station coverage gap

160°

Stations used

5

• Williams, CaliforniaPopulation 5,196. Forecast8 kmE
• South Yuba City, CaliforniaPopulation 15,217. Forecast37 kmW
• Chico, CaliforniaPopulation 121,345. Forecast67 kmSSW
• Los Angeles, CaliforniaPopulation 3,820,914. Forecast662 kmNNW

After

1. 1.71 km NNE of Talmage, CaliforniaWed, May 29, 6:38 PM PDT · 15091 days ago · 4 km deep · 95 km away
2. 1.85 km W of Cobb, CaliforniaThu, May 30, 2:50 AM PDT · 15090 days ago · 1 km deep · 73 km away
3. 2.17 km W of Cobb, CaliforniaThu, May 30, 8:28 AM PDT · 15090 days ago · 3 km deep · 75 km away
4. 2.19 km WSW of Meridian, CaliforniaThu, May 30, 4:55 PM PDT · 15090 days ago · 5 km deep · 8 km away
5. 2.510 km ESE of Williams, CaliforniaThu, May 30, 8:13 PM PDT · 15090 days ago · 18 km deep · 5 km away
6. 2.6Northern CaliforniaThu, May 30, 11:13 PM PDT · 15089 days ago · 1 km deep · 76 km away
7. 2.16 km E of Williams, CaliforniaFri, May 31, 12:54 AM PDT · 15089 days ago · 22 km deep · 1 km away
8. 2.810 km NNE of Arbuckle, CaliforniaFri, May 31, 5:42 AM PDT · 15089 days ago · 9 km deep · 6 km away
9. 3.69 km ESE of Williams, CaliforniaFri, May 31, 8:07 AM PDT · 15089 days ago · 13 km deep · 5 km away
10. 2.39 km SSW of Colusa, CaliforniaFri, May 31, 10:09 AM PDT · 15089 days ago · 16 km deep · 4 km away
11. 1.86 km SSW of Colusa, CaliforniaFri, May 31, 11:06 AM PDT · 15089 days ago · 5 km deep · 3 km away
12. 3.5Northern CaliforniaFri, May 31, 11:31 AM PDT · 15089 days ago · 23 km deep · 4 km away
13. 1.84 km SSW of Dunnigan, CaliforniaFri, May 31, 12:09 PM PDT · 15089 days ago · 5 km deep · 35 km away
14. 2.28 km NNE of Arbuckle, CaliforniaFri, May 31, 5:38 PM PDT · 15089 days ago · 4 km deep · 9 km away
15. 1.96 km W of Meridian, CaliforniaFri, May 31, 5:48 PM PDT · 15089 days ago · 5 km deep · 6 km away
16. 1.67 km SSW of Colusa, CaliforniaSat, Jun 1, 6:56 AM PDT · 15088 days ago · 5 km deep · 1 km away
17. 1.88 km W of Cobb, CaliforniaSat, Jun 1, 7:55 AM PDT · 15088 days ago · 1 km deep · 75 km away
18. 2.48 km W of Cobb, CaliforniaSat, Jun 1, 10:50 AM PDT · 15088 days ago · 1 km deep · 76 km away
19. 2.610 km WSW of Cobb, CaliforniaSat, Jun 1, 11:49 AM PDT · 15088 days ago · 2 km deep · 78 km away
20. 1.77 km NE of Clearlake, CaliforniaSat, Jun 1, 4:45 PM PDT · 15088 days ago · 1 km deep · 46 km away
21. 1.87 km W of Cobb, CaliforniaSun, Jun 2, 4:03 AM PDT · 15087 days ago · 0 km deep · 75 km away
22. 1.65 km W of Lower Lake, CaliforniaSun, Jun 2, 8:29 PM PDT · 15087 days ago · 4 km deep · 60 km away
23. 1.86 km W of Lower Lake, CaliforniaSun, Jun 2, 10:18 PM PDT · 15086 days ago · 4 km deep · 60 km away
24. 1.65km WNW of Lakeport, CASun, Jun 2, 10:24 PM PDT · 15086 days ago · 24 km deep · 79 km away
25. 1.78 km W of Cobb, CaliforniaMon, Jun 3, 1:39 AM PDT · 15086 days ago · 0 km deep · 76 km away
26. 2.07 km WNW of Arbuckle, CaliforniaMon, Jun 3, 2:27 AM PDT · 15086 days ago · 4 km deep · 15 km away
27. 2.210 km NNE of Hopland, CaliforniaMon, Jun 3, 3:18 AM PDT · 15086 days ago · 5 km deep · 87 km away
28. 2.010 km NNE of Hopland, CaliforniaMon, Jun 3, 3:23 AM PDT · 15086 days ago · 5 km deep · 88 km away
29. 2.44 km S of Oroville East, CaliforniaMon, Jun 3, 11:40 AM PDT · 15086 days ago · 2 km deep · 61 km away
30. 2.27 km W of Cobb, CaliforniaMon, Jun 3, 1:49 PM PDT · 15086 days ago · 0 km deep · 75 km away
31. 1.66 km W of Cobb, CaliforniaTue, Jun 4, 3:41 AM PDT · 15085 days ago · 4 km deep · 74 km away
32. 1.722 km NE of Potter Valley, CaliforniaTue, Jun 4, 12:29 PM PDT · 15085 days ago · 7 km deep · 82 km away
33. 1.65 km SW of Cobb, CaliforniaTue, Jun 4, 3:06 PM PDT · 15085 days ago · 1 km deep · 73 km away
34. 1.89 km S of Hopland, CaliforniaTue, Jun 4, 6:54 PM PDT · 15085 days ago · 5 km deep · 98 km away
35. 2.24 km SW of Cobb, CaliforniaTue, Jun 4, 10:34 PM PDT · 15084 days ago · 1 km deep · 73 km away
36. 2.38 km E of Williams, CaliforniaWed, Jun 5, 3:52 AM PDT · 15084 days ago · 17 km deep · 2 km away
37. 1.66 km WSW of Cobb, CaliforniaWed, Jun 5, 10:41 AM PDT · 15084 days ago · 1 km deep · 74 km away
38. 2.014 km N of Upper Lake, CaliforniaWed, Jun 5, 1:20 PM PDT · 15084 days ago · -1 km deep · 76 km away
39. 1.76 km W of Cobb, CaliforniaThu, Jun 6, 1:00 AM PDT · 15083 days ago · 3 km deep · 74 km away
40. 1.75 km WSW of Cobb, CaliforniaThu, Jun 6, 3:12 AM PDT · 15083 days ago · 0 km deep · 74 km away
41. 1.68 km WSW of Cobb, CaliforniaThu, Jun 6, 4:30 AM PDT · 15083 days ago · 3 km deep · 76 km away
42. 2.07 km NNE of Arbuckle, CaliforniaThu, Jun 6, 4:14 PM PDT · 15083 days ago · 8 km deep · 9 km away
43. 1.65 km NE of College City, CaliforniaThu, Jun 6, 6:30 PM PDT · 15083 days ago · 4 km deep · 15 km away
44. 1.79 km NW of Cobb, CaliforniaThu, Jun 6, 8:38 PM PDT · 15083 days ago · 1 km deep · 72 km away
45. 2.09 km ESE of Williams, CaliforniaFri, Jun 7, 11:57 AM PDT · 15082 days ago · 5 km deep · 4 km away
46. 2.26 km W of Cobb, CaliforniaFri, Jun 7, 12:28 PM PDT · 15082 days ago · 2 km deep · 74 km away
47. 1.66 km W of Cobb, CaliforniaFri, Jun 7, 12:28 PM PDT · 15082 days ago · 2 km deep · 74 km away
48. 1.66 km W of Cobb, CaliforniaFri, Jun 7, 6:43 PM PDT · 15082 days ago · 0 km deep · 74 km away
49. 1.98 km W of Cobb, CaliforniaFri, Jun 7, 9:47 PM PDT · 15081 days ago · 0 km deep · 75 km away
50. 1.910 km N of Arbuckle, CaliforniaSat, Jun 8, 8:07 AM PDT · 15081 days ago · 7 km deep · 6 km away
51. 1.56 km W of Cobb, CaliforniaSun, Jun 9, 1:16 AM PDT · 15080 days ago · 3 km deep · 74 km away
52. 1.85 km SW of Cobb, CaliforniaSun, Jun 9, 12:41 PM PDT · 15080 days ago · 0 km deep · 74 km away
53. 1.75 km SW of Cobb, CaliforniaMon, Jun 10, 1:11 PM PDT · 15079 days ago · 1 km deep · 74 km away
54. 1.67 km WSW of Cobb, CaliforniaMon, Jun 10, 5:37 PM PDT · 15079 days ago · 1 km deep · 75 km away
55. 1.65 km W of Cobb, CaliforniaTue, Jun 11, 1:10 PM PDT · 15078 days ago · 1 km deep · 72 km away
56. 1.66 km W of Cobb, CaliforniaTue, Jun 11, 9:24 PM PDT · 15078 days ago · 2 km deep · 74 km away
57. 1.67 km NNE of Hopland, CaliforniaTue, Jun 11, 11:46 PM PDT · 15077 days ago · 0 km deep · 89 km away
58. 2.3Northern CaliforniaWed, Jun 12, 8:38 AM PDT · 15077 days ago · 5 km deep · 97 km away
59. 2.310 km NE of Vina, CaliforniaWed, Jun 12, 4:21 PM PDT · 15077 days ago · -1 km deep · 94 km away
60. 3.16 km W of Cobb, CaliforniaWed, Jun 12, 6:53 PM PDT · 15077 days ago · 1 km deep · 74 km away

The first 60 of 180.

From the USGS Earthquake Hazards Program and its partner networks, event nc48170. Read Tue, Sep 22, 2026, 4:09 PM UTC.