M1.7 earthquake 6 km SW of Cobb, California

Magnitude

1.7 (md), micro

Local time

Thu, Jun 20, 1985, 1:17 PM PDT

UTC

1985-06-20 20:17:28 UTC

Depth

3.6 km (2.2 mi), shallow

Epicenter

38.784° N, 122.778° W

Region

California

Tsunami flag

No

Status

Reviewed by a seismologist

Location uncertainty

About 0.2 km horizontally, 0.4 km in depth

Magnitude uncertainty

±0.15

Depth from

From location

Station coverage gap

56°

Stations used

19

• Cobb, CaliforniaPopulation 1,778. Forecast6 kmSW
• Healdsburg, CaliforniaPopulation 11,742. Forecast21 kmNNE
• Santa Rosa, CaliforniaPopulation 178,127. Forecast39 kmN
• Los Angeles, CaliforniaPopulation 3,820,914. Forecast664 kmNW

After

1. 2.96 km W of Cobb, CaliforniaThu, Jun 20, 6:58 PM PDT · 15069 days ago · 1 km deep · 5 km away
2. 1.75 km WSW of Cobb, CaliforniaThu, Jun 20, 9:00 PM PDT · 15069 days ago · 2 km deep · 3 km away
3. 2.613 km ENE of Cloverdale, CaliforniaFri, Jun 21, 11:18 AM PDT · 15068 days ago · 4 km deep · 11 km away
4. 1.53 km ENE of Williams, CaliforniaFri, Jun 21, 12:07 PM PDT · 15068 days ago · 14 km deep · 72 km away
5. 1.97 km W of Cobb, CaliforniaFri, Jun 21, 6:41 PM PDT · 15068 days ago · 1 km deep · 5 km away
6. 2.617 km N of Upper Lake, CaliforniaSat, Jun 22, 12:15 AM PDT · 15068 days ago · 11 km deep · 61 km away
7. 1.97 km W of Cobb, CaliforniaSat, Jun 22, 4:37 AM PDT · 15067 days ago · 3 km deep · 5 km away
8. 1.64 km W of Cobb, CaliforniaSat, Jun 22, 8:24 AM PDT · 15067 days ago · 1 km deep · 4 km away
9. 2.05 km NNE of Williams, CaliforniaSat, Jun 22, 7:22 PM PDT · 15067 days ago · 16 km deep · 73 km away
10. 2.67 km W of Cobb, CaliforniaSat, Jun 22, 8:43 PM PDT · 15067 days ago · 3 km deep · 4 km away
11. 2.47 km W of Cobb, CaliforniaSat, Jun 22, 8:56 PM PDT · 15067 days ago · 3 km deep · 4 km away
12. 2.06 km SW of Cobb, CaliforniaSun, Jun 23, 12:22 PM PDT · 15066 days ago · 1 km deep · 0 km away
13. 1.610 km NNW of Sutter, CaliforniaSun, Jun 23, 1:12 PM PDT · 15066 days ago · 4 km deep · 97 km away
14. 1.72 km W of Santa Rosa, CaliforniaSun, Jun 23, 7:34 PM PDT · 15066 days ago · 6 km deep · 38 km away
15. 2.18 km WSW of Cobb, CaliforniaMon, Jun 24, 12:54 AM PDT · 15066 days ago · 4 km deep · 3 km away
16. 1.94 km SW of Cobb, CaliforniaMon, Jun 24, 1:05 AM PDT · 15066 days ago · 0 km deep · 2 km away
17. 1.76 km SSW of Calistoga, CaliforniaMon, Jun 24, 6:57 PM PDT · 15065 days ago · 5 km deep · 33 km away
18. 1.75 km SSW of Cobb, CaliforniaTue, Jun 25, 2:19 AM PDT · 15064 days ago · -1 km deep · 2 km away
19. 2.210 km NNW of Stonyford, CaliforniaTue, Jun 25, 5:34 PM PDT · 15064 days ago · 7 km deep · 78 km away
20. 1.87 km W of Cobb, CaliforniaWed, Jun 26, 4:49 AM PDT · 15063 days ago · 3 km deep · 5 km away
21. 2.310 km NNW of Stonyford, CaliforniaWed, Jun 26, 3:20 PM PDT · 15063 days ago · 4 km deep · 78 km away
22. 2.25 km E of Calpella, CaliforniaThu, Jun 27, 2:54 AM PDT · 15062 days ago · 7 km deep · 59 km away
23. 1.66 km E of Calpella, CaliforniaThu, Jun 27, 4:56 AM PDT · 15062 days ago · 4 km deep · 59 km away
24. 1.96 km WSW of Cobb, CaliforniaThu, Jun 27, 6:38 AM PDT · 15062 days ago · 3 km deep · 3 km away
25. 2.04 km WSW of Cobb, CaliforniaFri, Jun 28, 3:36 PM PDT · 15061 days ago · 1 km deep · 2 km away
26. 2.58 km SSW of Colusa, CaliforniaSat, Jun 29, 7:20 AM PDT · 15060 days ago · 5 km deep · 75 km away
27. 2.06 km W of Cobb, CaliforniaSat, Jun 29, 3:31 PM PDT · 15060 days ago · 3 km deep · 5 km away
28. 1.66 km W of Cobb, CaliforniaSun, Jun 30, 8:25 AM PDT · 15059 days ago · 3 km deep · 5 km away
29. 2.14 km SSE of Green Valley, CaliforniaSun, Jun 30, 10:09 PM PDT · 15059 days ago · 9 km deep · 84 km away
30. 1.86 km W of Cobb, CaliforniaMon, Jul 1, 2:42 AM PDT · 15058 days ago · 0 km deep · 5 km away
31. 2.06 km W of Cobb, CaliforniaMon, Jul 1, 7:26 AM PDT · 15058 days ago · 2 km deep · 4 km away
32. 1.96 km W of Cobb, CaliforniaMon, Jul 1, 7:30 AM PDT · 15058 days ago · 2 km deep · 4 km away
33. 2.47 km WSW of Cobb, CaliforniaMon, Jul 1, 10:08 AM PDT · 15058 days ago · 1 km deep · 3 km away
34. 1.612 km E of Cloverdale, CaliforniaTue, Jul 2, 8:30 PM PDT · 15057 days ago · 5 km deep · 10 km away
35. 1.84 km WSW of Cobb, CaliforniaTue, Jul 2, 10:51 PM PDT · 15057 days ago · 1 km deep · 2 km away
36. 1.66 km W of Cobb, CaliforniaWed, Jul 3, 2:45 AM PDT · 15056 days ago · 3 km deep · 4 km away
37. 4.312 km WSW of Kelseyville, CaliforniaWed, Jul 3, 3:24 AM PDT · 15056 days ago · 4 km deep · 23 km away
38. 1.77 km WSW of Cobb, CaliforniaWed, Jul 3, 10:39 PM PDT · 15056 days ago · 2 km deep · 3 km away
39. 2.17 km SSW of Colusa, CaliforniaThu, Jul 4, 6:44 AM PDT · 15055 days ago · 13 km deep · 75 km away
40. 1.76 km NE of Williams, CaliforniaThu, Jul 4, 3:02 PM PDT · 15055 days ago · 12 km deep · 74 km away
41. 1.95 km SSE of Clear Lake Riviera, CaliforniaThu, Jul 4, 9:32 PM PDT · 15055 days ago · 1 km deep · 16 km away
42. 2.37 km SW of Colusa, CaliforniaFri, Jul 5, 4:10 AM PDT · 15054 days ago · 15 km deep · 75 km away
43. 2.37 km W of Cobb, CaliforniaFri, Jul 5, 8:57 PM PDT · 15054 days ago · 1 km deep · 5 km away
44. 3.07 km W of Cobb, CaliforniaFri, Jul 5, 10:12 PM PDT · 15054 days ago · 3 km deep · 5 km away
45. 1.94 km W of Cobb, CaliforniaSat, Jul 6, 12:44 PM PDT · 15053 days ago · 2 km deep · 4 km away
46. 2.37 km WSW of Cobb, CaliforniaSat, Jul 6, 6:33 PM PDT · 15053 days ago · 3 km deep · 4 km away
47. 2.28 km ESE of Willows, CaliforniaSat, Jul 6, 8:02 PM PDT · 15053 days ago · 14 km deep · 98 km away
48. 1.57 km W of Cobb, CaliforniaSun, Jul 7, 10:12 AM PDT · 15052 days ago · 3 km deep · 4 km away
49. 2.023 km SE of Covelo, CaliforniaSun, Jul 7, 2:19 PM PDT · 15052 days ago · 4 km deep · 97 km away
50. 1.88 km WSW of Cobb, CaliforniaMon, Jul 8, 1:34 AM PDT · 15052 days ago · 2 km deep · 4 km away
51. 2.07 km W of Cobb, CaliforniaMon, Jul 8, 7:44 AM PDT · 15051 days ago · 2 km deep · 4 km away
52. 1.85 km WSW of Cobb, CaliforniaMon, Jul 8, 11:56 AM PDT · 15051 days ago · 0 km deep · 2 km away
53. 1.98 km WSW of Meridian, CaliforniaTue, Jul 9, 4:20 AM PDT · 15050 days ago · 4 km deep · 76 km away
54. 1.74 km W of Cobb, CaliforniaTue, Jul 9, 1:22 PM PDT · 15050 days ago · 0 km deep · 5 km away
55. 1.76 km W of Cobb, CaliforniaWed, Jul 10, 2:50 AM PDT · 15049 days ago · 1 km deep · 6 km away
56. 1.84 km WSW of Cobb, CaliforniaWed, Jul 10, 7:56 AM PDT · 15049 days ago · 1 km deep · 2 km away
57. 2.49 km SE of Suisun, CaliforniaThu, Jul 11, 1:49 AM PDT · 15048 days ago · 2 km deep · 98 km away
58. 2.36 km WSW of Eldridge, CaliforniaThu, Jul 11, 3:24 PM PDT · 15048 days ago · 7 km deep · 54 km away
59. 1.728 km NE of Potter Valley, CaliforniaThu, Jul 11, 6:27 PM PDT · 15048 days ago · 8 km deep · 81 km away
60. 2.56 km WSW of Eldridge, CaliforniaThu, Jul 11, 10:38 PM PDT · 15048 days ago · 7 km deep · 54 km away

The first 60 of 170.

Before

1. 1.66 km W of Cobb, CaliforniaThu, Jun 20, 1:12 PM PDT · 15069 days ago · 0 km deep · 5 km away
2. 2.87 km W of Cobb, CaliforniaWed, Jun 19, 7:36 PM PDT · 15070 days ago · 4 km deep · 5 km away
3. 2.510 km WSW of Cobb, CaliforniaWed, Jun 19, 5:51 PM PDT · 15070 days ago · 2 km deep · 5 km away
4. 1.63 km SW of Cobb, CaliforniaWed, Jun 19, 9:27 AM PDT · 15070 days ago · 1 km deep · 3 km away
5. 1.67 km W of Cobb, CaliforniaTue, Jun 18, 6:18 AM PDT · 15071 days ago · 1 km deep · 5 km away

From the USGS Earthquake Hazards Program and its partner networks, event nc49897. Read Tue, Sep 22, 2026, 8:10 PM UTC.