M1.6 earthquake 7 km W of Cobb, California

Magnitude

1.6 (md), micro

Local time

Wed, Oct 20, 1976, 9:05 PM PDT

UTC

1976-10-21 04:05:06 UTC

Depth

3.0 km (1.9 mi), shallow

Epicenter

38.822° N, 122.805° W

Region

California

Tsunami flag

No

Status

Reviewed by a seismologist

Location uncertainty

About 0.3 km horizontally, 0.7 km in depth

Magnitude uncertainty

±0.29

Depth from

From location

Station coverage gap

93°

Stations used

11

• Cobb, CaliforniaPopulation 1,778. Forecast7 kmW
• Clearlake, CaliforniaPopulation 15,182. Forecast22 kmSW
• Santa Rosa, CaliforniaPopulation 178,127. Forecast43 kmN
• Los Angeles, CaliforniaPopulation 3,820,914. Forecast669 kmNW

After

1. 1.910 km E of Hidden Valley Lake, CaliforniaThu, Oct 21, 10:57 PM PDT · 18240 days ago · 9 km deep · 32 km away
2. 2.77 km SW of Calistoga, CaliforniaFri, Oct 22, 8:52 AM PDT · 18239 days ago · 6 km deep · 36 km away
3. 1.66 km W of Cobb, CaliforniaSun, Oct 24, 5:56 PM PDT · 18237 days ago · 3 km deep · 1 km away
4. 1.76 km W of Cobb, CaliforniaSun, Oct 24, 10:01 PM PDT · 18237 days ago · 3 km deep · 0 km away
5. 1.67 km SSW of Calistoga, CaliforniaMon, Oct 25, 5:05 AM PDT · 18237 days ago · 6 km deep · 37 km away
6. 2.17 km NE of Hidden Valley Lake, CaliforniaWed, Oct 27, 5:43 AM PDT · 18235 days ago · 5 km deep · 28 km away
7. 2.06 km W of Cobb, CaliforniaWed, Oct 27, 7:34 PM PDT · 18234 days ago · 4 km deep · 0 km away
8. 2.46 km W of Cobb, CaliforniaFri, Oct 29, 11:31 AM PDT · 18232 days ago · 3 km deep · 1 km away
9. 1.67 km W of Cobb, CaliforniaSun, Oct 31, 5:33 AM PST · 18230 days ago · 3 km deep · 0 km away
10. 1.97 km WSW of Cobb, CaliforniaMon, Nov 1, 8:40 AM PST · 18229 days ago · 4 km deep · 2 km away
11. 2.16 km WSW of Cobb, CaliforniaMon, Nov 1, 7:40 PM PST · 18229 days ago · 1 km deep · 2 km away
12. 1.99 km WNW of Cobb, CaliforniaTue, Nov 2, 12:23 AM PST · 18229 days ago · 3 km deep · 5 km away
13. 1.84 km NW of Clearlake, CaliforniaThu, Nov 4, 10:56 PM PST · 18226 days ago · 1 km deep · 22 km away
14. 1.910 km E of Hidden Valley Lake, CaliforniaFri, Nov 5, 2:10 AM PST · 18226 days ago · 10 km deep · 32 km away
15. 1.58 km W of Cobb, CaliforniaFri, Nov 5, 9:45 PM PST · 18225 days ago · -1 km deep · 2 km away
16. 2.57 km W of Cobb, CaliforniaSun, Nov 7, 7:03 PM PST · 18223 days ago · 3 km deep · 1 km away
17. 2.45 km SW of Kenwood, CaliforniaTue, Nov 9, 3:56 AM PST · 18222 days ago · 7 km deep · 53 km away
18. 3.07 km ESE of Willits, CaliforniaWed, Nov 10, 6:33 PM PST · 18220 days ago · 11 km deep · 74 km away
19. 2.515 km SE of Hidden Valley Lake, CaliforniaThu, Nov 11, 8:16 PM PST · 18219 days ago · 4 km deep · 35 km away
20. 2.015 km ESE of Hidden Valley Lake, CaliforniaThu, Nov 11, 8:26 PM PST · 18219 days ago · 6 km deep · 36 km away
21. 2.214 km ESE of Hidden Valley Lake, CaliforniaThu, Nov 11, 10:48 PM PST · 18219 days ago · 6 km deep · 36 km away
22. 1.73 km N of Windsor, CaliforniaFri, Nov 12, 7:50 AM PST · 18218 days ago · 6 km deep · 27 km away
23. 1.76 km W of Cobb, CaliforniaFri, Nov 12, 2:51 PM PST · 18218 days ago · 3 km deep · 1 km away
24. 2.01 km W of Clearlake, CaliforniaFri, Nov 12, 6:16 PM PST · 18218 days ago · 0 km deep · 20 km away
25. 1.62 km WSW of Clearlake, CaliforniaFri, Nov 12, 7:18 PM PST · 18218 days ago · 5 km deep · 19 km away
26. 2.01 km ESE of Clear Lake Riviera, CaliforniaFri, Nov 12, 8:13 PM PST · 18218 days ago · 1 km deep · 17 km away
27. 1.94 km WSW of Cobb, CaliforniaSun, Nov 14, 1:49 AM PST · 18217 days ago · 1 km deep · 3 km away
28. 2.521 km W of Stonyford, CaliforniaSun, Nov 14, 7:48 AM PST · 18216 days ago · 14 km deep · 63 km away
29. 2.123 km W of Stonyford, CaliforniaMon, Nov 15, 12:07 AM PST · 18216 days ago · 1 km deep · 60 km away
30. 2.56 km W of Cobb, CaliforniaMon, Nov 15, 1:21 AM PST · 18216 days ago · 3 km deep · 0 km away
31. 1.97 km WSW of Cobb, CaliforniaTue, Nov 16, 2:50 AM PST · 18215 days ago · 2 km deep · 2 km away
32. 1.66 km WSW of Cobb, CaliforniaTue, Nov 16, 4:41 PM PST · 18214 days ago · 3 km deep · 2 km away
33. 2.26 km W of Cobb, CaliforniaThu, Nov 18, 7:12 AM PST · 18212 days ago · 3 km deep · 1 km away
34. 1.87 km W of Cobb, CaliforniaMon, Nov 22, 2:18 PM PST · 18208 days ago · 3 km deep · 0 km away
35. 1.98 km W of Cobb, CaliforniaTue, Nov 23, 6:32 AM PST · 18207 days ago · 0 km deep · 2 km away
36. 1.84 km WSW of Cobb, CaliforniaWed, Nov 24, 4:06 AM PST · 18207 days ago · 2 km deep · 4 km away
37. 2.515 km NE of Nice, CaliforniaWed, Nov 24, 5:56 AM PST · 18206 days ago · 8 km deep · 45 km away
38. 2.516 km NE of Nice, CaliforniaWed, Nov 24, 6:04 AM PST · 18206 days ago · 11 km deep · 47 km away
39. 2.317 km NE of Nice, CaliforniaWed, Nov 24, 6:05 AM PST · 18206 days ago · 9 km deep · 46 km away
40. 2.215 km NE of Nice, CaliforniaWed, Nov 24, 6:11 AM PST · 18206 days ago · 8 km deep · 45 km away
41. 2.27 km SW of Stonyford, CaliforniaWed, Nov 24, 6:42 AM PST · 18206 days ago · 7 km deep · 59 km away
42. 2.74 km W of Stonyford, CaliforniaWed, Nov 24, 6:43 AM PST · 18206 days ago · 14 km deep · 65 km away
43. 1.96 km NNE of Lucerne, CaliforniaWed, Nov 24, 7:14 AM PST · 18206 days ago · 5 km deep · 36 km away
44. 1.616 km NE of Nice, CaliforniaWed, Nov 24, 7:29 AM PST · 18206 days ago · 3 km deep · 46 km away
45. 2.117 km NE of Nice, CaliforniaWed, Nov 24, 8:05 AM PST · 18206 days ago · 9 km deep · 47 km away
46. 2.214 km NE of Nice, CaliforniaWed, Nov 24, 8:05 AM PST · 18206 days ago · 9 km deep · 44 km away
47. 2.218 km WSW of Lodoga, CaliforniaWed, Nov 24, 8:21 AM PST · 18206 days ago · 8 km deep · 49 km away
48. 1.811 km NE of Nice, CaliforniaWed, Nov 24, 10:34 AM PST · 18206 days ago · 8 km deep · 41 km away
49. 2.117 km NE of Nice, CaliforniaWed, Nov 24, 10:45 AM PST · 18206 days ago · 7 km deep · 47 km away
50. 1.92 km ESE of Boonville, CaliforniaThu, Nov 25, 5:31 AM PST · 18205 days ago · 5 km deep · 50 km away
51. 1.58 km WSW of Cobb, CaliforniaFri, Nov 26, 11:07 AM PST · 18204 days ago · 4 km deep · 3 km away
52. 2.411 km NE of Upper Lake, CaliforniaSat, Nov 27, 4:20 AM PST · 18204 days ago · 8 km deep · 45 km away
53. 2.112 km ENE of Clearlake, CaliforniaSat, Nov 27, 10:34 AM PST · 18203 days ago · 17 km deep · 33 km away
54. 2.06 km WSW of Cobb, CaliforniaSat, Nov 27, 1:03 PM PST · 18203 days ago · 4 km deep · 2 km away
55. 2.27 km W of Cobb, CaliforniaSat, Nov 27, 6:28 PM PST · 18203 days ago · 4 km deep · 1 km away
56. 2.011 km NE of Healdsburg, CaliforniaMon, Nov 29, 1:33 AM PST · 18202 days ago · 6 km deep · 17 km away
57. 2.84 km WSW of Cobb, CaliforniaMon, Nov 29, 8:16 AM PST · 18201 days ago · 4 km deep · 3 km away
58. 1.67 km W of Cobb, CaliforniaMon, Nov 29, 9:57 AM PST · 18201 days ago · 3 km deep · 1 km away
59. 1.54 km E of Soda Bay, CaliforniaMon, Nov 29, 12:21 PM PST · 18201 days ago · -1 km deep · 21 km away
60. 1.56 km WSW of Cobb, CaliforniaMon, Nov 29, 2:06 PM PST · 18201 days ago · -1 km deep · 2 km away

The first 60 of 98.

Before

1. 2.47 km W of Cobb, CaliforniaWed, Oct 20, 4:58 AM PDT · 18242 days ago · 0 km deep · 1 km away
2. 1.76 km W of Cobb, CaliforniaTue, Oct 19, 10:38 PM PDT · 18242 days ago · 3 km deep · 0 km away
3. 1.66 km W of Cobb, CaliforniaTue, Oct 19, 8:20 PM PDT · 18242 days ago · 3 km deep · 0 km away
4. 1.66 km W of Cobb, CaliforniaMon, Oct 18, 7:19 AM PDT · 18243 days ago · 5 km deep · 0 km away
5. 2.47 km SSW of Calistoga, CaliforniaFri, Oct 15, 4:06 PM PDT · 18246 days ago · 7 km deep · 36 km away
6. 1.86 km WSW of Cobb, CaliforniaThu, Oct 14, 4:13 AM PDT · 18248 days ago · 3 km deep · 2 km away
7. 1.67 km WSW of Cobb, CaliforniaTue, Oct 12, 4:56 PM PDT · 18249 days ago · 3 km deep · 3 km away
8. 2.06 km W of Cobb, CaliforniaTue, Oct 12, 6:25 AM PDT · 18249 days ago · 3 km deep · 0 km away
9. 1.56 km W of Cobb, CaliforniaTue, Oct 12, 3:07 AM PDT · 18250 days ago · 3 km deep · 0 km away
10. 2.56 km W of Cobb, CaliforniaTue, Oct 12, 2:45 AM PDT · 18250 days ago · 4 km deep · 0 km away
11. 1.67 km W of Cobb, CaliforniaMon, Oct 11, 4:35 AM PDT · 18251 days ago · 3 km deep · 1 km away
12. 1.76 km NW of Cobb, CaliforniaSun, Oct 10, 8:13 AM PDT · 18251 days ago · 2 km deep · 6 km away
13. 1.79 km SE of Hopland, CaliforniaFri, Oct 8, 8:43 PM PDT · 18253 days ago · 1 km deep · 22 km away
14. 2.54 km SSE of Clear Lake Riviera, CaliforniaFri, Oct 8, 8:11 PM PDT · 18253 days ago · 4 km deep · 15 km away
15. 1.75 km E of Hopland, CaliforniaFri, Oct 8, 4:52 AM PDT · 18254 days ago · 5 km deep · 27 km away
16. 1.77 km W of Cobb, CaliforniaThu, Oct 7, 3:25 AM PDT · 18255 days ago · 1 km deep · 0 km away
17. 1.77 km W of Cobb, CaliforniaWed, Oct 6, 5:14 PM PDT · 18255 days ago · -1 km deep · 1 km away
18. 2.38 km W of Healdsburg, CaliforniaWed, Oct 6, 3:48 PM PDT · 18255 days ago · 0 km deep · 26 km away
19. 1.71 km NE of Clear Lake Riviera, CaliforniaTue, Oct 5, 10:49 AM PDT · 18256 days ago · 0 km deep · 18 km away
20. 1.64 km WSW of Cobb, CaliforniaMon, Oct 4, 10:22 PM PDT · 18257 days ago · 1 km deep · 4 km away

From the USGS Earthquake Hazards Program and its partner networks, event nc1031997. Read Wed, Sep 30, 2026, 12:48 AM UTC.