M1.6 earthquake 7 km ESE of Talmage, California

Magnitude

1.6 (Md, duration), micro

Magnitude from

Northern California Seismic System

Local time

Sat, May 4, 1991, 9:43 AM PDT

UTC

1991-05-04 16:43:04 UTC

Depth

8.2 km (5.1 mi), shallow

Epicenter

39.109° N, 123.081° W

Region

California

Tsunami flag

No

Status

Reviewed by a seismologist

Location uncertainty

About 1.5 km horizontally, 1.7 km in depth

Magnitude uncertainty

±0.68

Depth from

From location

Station coverage gap

223°, poorly surrounded by stations

Stations used

3

• Talmage, CaliforniaPopulation 1,130. Forecast8 kmESE
• Ukiah, CaliforniaPopulation 15,917. Forecast12 kmESE
• Santa Rosa, CaliforniaPopulation 178,127. Forecast81 kmNNW
• Los Angeles, CaliforniaPopulation 3,820,914. Forecast709 kmNW

After

1. 1.74 km WSW of Cobb, CaliforniaSat, May 4, 4:13 PM PDT · 12938 days ago · 1 km deep · 42 km away
2. 1.612 km ESE of Hidden Valley Lake, CaliforniaSun, May 5, 4:51 AM PDT · 12937 days ago · 6 km deep · 69 km away
3. 1.68 km ENE of Brooktrails, CaliforniaSun, May 5, 12:03 PM PDT · 12937 days ago · 8 km deep · 46 km away
4. 2.011 km ESE of Hidden Valley Lake, CaliforniaSun, May 5, 10:50 PM PDT · 12936 days ago · 4 km deep · 68 km away
5. 1.83 km E of Upper Lake, CaliforniaMon, May 6, 6:26 AM PDT · 12936 days ago · 7 km deep · 19 km away
6. 1.58 km W of Cobb, CaliforniaMon, May 6, 12:13 PM PDT · 12936 days ago · -1 km deep · 39 km away
7. 2.38 km W of Cobb, CaliforniaMon, May 6, 12:15 PM PDT · 12936 days ago · 0 km deep · 39 km away
8. 2.25 km WSW of Cobb, CaliforniaTue, May 7, 5:09 AM PDT · 12935 days ago · 3 km deep · 42 km away
9. 1.57 km W of Middletown, CaliforniaTue, May 7, 9:34 AM PDT · 12935 days ago · 2 km deep · 52 km away
10. 1.98 km WSW of Cobb, CaliforniaTue, May 7, 5:21 PM PDT · 12935 days ago · 3 km deep · 42 km away
11. 2.16 km SW of Boonville, CaliforniaWed, May 8, 6:09 AM PDT · 12934 days ago · 4 km deep · 33 km away
12. 2.75 km WSW of Cobb, CaliforniaWed, May 8, 12:13 PM PDT · 12934 days ago · 2 km deep · 44 km away
13. 1.95 km WNW of Cobb, CaliforniaWed, May 8, 2:21 PM PDT · 12934 days ago · 1 km deep · 39 km away
14. 2.34 km WSW of Cobb, CaliforniaThu, May 9, 5:18 AM PDT · 12933 days ago · 1 km deep · 42 km away
15. 2.02 km SSW of Cobb, CaliforniaThu, May 9, 11:43 AM PDT · 12933 days ago · 2 km deep · 45 km away
16. 2.16 km WNW of Cobb, CaliforniaFri, May 10, 7:47 AM PDT · 12932 days ago · 1 km deep · 39 km away
17. 1.84 km W of Cobb, CaliforniaSat, May 11, 12:06 AM PDT · 12931 days ago · 1 km deep · 42 km away
18. 2.224 km NE of Potter Valley, CaliforniaSat, May 11, 7:41 AM PDT · 12931 days ago · 11 km deep · 45 km away
19. 2.07 km W of Cobb, CaliforniaSat, May 11, 2:20 PM PDT · 12931 days ago · 1 km deep · 39 km away
20. 1.97 km E of Willits, CaliforniaSat, May 11, 11:49 PM PDT · 12930 days ago · 8 km deep · 38 km away
21. 1.86 km WNW of Cobb, CaliforniaSun, May 12, 2:11 AM PDT · 12930 days ago · 1 km deep · 39 km away
22. 1.74 km W of Cobb, CaliforniaSun, May 12, 11:39 AM PDT · 12930 days ago · 2 km deep · 41 km away
23. 1.67 km E of Hidden Valley Lake, CaliforniaSun, May 12, 10:05 PM PDT · 12929 days ago · 7 km deep · 63 km away
24. 1.79 km W of Cobb, CaliforniaMon, May 13, 5:49 AM PDT · 12929 days ago · 1 km deep · 39 km away
25. 2.55 km SW of Cobb, CaliforniaMon, May 13, 6:45 AM PDT · 12929 days ago · 2 km deep · 44 km away
26. 1.60 km SE of Redwood Valley, CaliforniaMon, May 13, 11:22 AM PDT · 12929 days ago · 7 km deep · 20 km away
27. 1.77 km E of Hidden Valley Lake, CaliforniaMon, May 13, 6:51 PM PDT · 12928 days ago · 7 km deep · 63 km away
28. 1.610 km N of Cloverdale, CaliforniaTue, May 14, 3:23 AM PDT · 12928 days ago · 2 km deep · 24 km away
29. 1.74 km WNW of Calpella, CaliforniaTue, May 14, 10:02 AM PDT · 12928 days ago · 2 km deep · 21 km away
30. 1.73 km E of Santa Rosa, CaliforniaTue, May 14, 1:03 PM PDT · 12928 days ago · 9 km deep · 82 km away
31. 1.74 km W of Cobb, CaliforniaTue, May 14, 5:06 PM PDT · 12928 days ago · 0 km deep · 41 km away
32. 2.15 km WSW of Cobb, CaliforniaTue, May 14, 5:25 PM PDT · 12928 days ago · 4 km deep · 43 km away
33. 1.74 km W of Cobb, CaliforniaWed, May 15, 3:22 AM PDT · 12927 days ago · 2 km deep · 42 km away
34. 2.06 km WNW of Cobb, CaliforniaThu, May 16, 1:48 AM PDT · 12926 days ago · 1 km deep · 39 km away
35. 1.98 km ENE of Clearlake, CaliforniaThu, May 16, 1:14 PM PDT · 12926 days ago · 8 km deep · 49 km away
36. 1.7Northern CaliforniaThu, May 16, 3:36 PM PDT · 12926 days ago · 2 km deep · 38 km away
37. 1.74 km W of Cobb, CaliforniaThu, May 16, 5:54 PM PDT · 12926 days ago · 0 km deep · 41 km away
38. 1.512 km N of Brooktrails, CaliforniaThu, May 16, 6:39 PM PDT · 12925 days ago · 8 km deep · 56 km away
39. 2.318 km NE of Upper Lake, CaliforniaThu, May 16, 10:14 PM PDT · 12925 days ago · 10 km deep · 34 km away
40. 1.55 km SW of Glen Ellen, CaliforniaFri, May 17, 5:30 AM PDT · 12925 days ago · 10 km deep · 97 km away
41. 1.85 km W of Cobb, CaliforniaSat, May 18, 7:00 AM PDT · 12924 days ago · 0 km deep · 41 km away
42. 3.09 km W of Cobb, CaliforniaSat, May 18, 4:31 PM PDT · 12924 days ago · 0 km deep · 40 km away
43. 2.78 km WSW of Cobb, CaliforniaSat, May 18, 4:31 PM PDT · 12924 days ago · 0 km deep · 40 km away
44. 1.98 km W of Cobb, CaliforniaSat, May 18, 4:34 PM PDT · 12924 days ago · 0 km deep · 39 km away
45. 1.65 km W of Cobb, CaliforniaSun, May 19, 6:46 PM PDT · 12922 days ago · 0 km deep · 42 km away
46. 2.24 km WSW of Cobb, CaliforniaTue, May 21, 4:04 PM PDT · 12921 days ago · 0 km deep · 43 km away
47. 1.74 km WSW of Cobb, CaliforniaTue, May 21, 4:05 PM PDT · 12921 days ago · 0 km deep · 43 km away
48. 3.08 km WSW of Cobb, CaliforniaWed, May 22, 7:00 PM PDT · 12919 days ago · 4 km deep · 42 km away
49. 3.323 km NE of Potter Valley, CaliforniaThu, May 23, 8:04 PM PDT · 12918 days ago · 16 km deep · 44 km away
50. 2.311 km NNW of Potter Valley, CaliforniaFri, May 24, 6:33 AM PDT · 12918 days ago · 0 km deep · 35 km away
51. 2.14 km W of Cobb, CaliforniaFri, May 24, 7:00 AM PDT · 12918 days ago · 2 km deep · 41 km away
52. 2.68 km W of Cobb, CaliforniaFri, May 24, 4:03 PM PDT · 12918 days ago · -1 km deep · 39 km away
53. 2.67 km W of Cobb, CaliforniaFri, May 24, 4:04 PM PDT · 12918 days ago · 1 km deep · 39 km away
54. 1.78 km W of Cobb, CaliforniaFri, May 24, 4:05 PM PDT · 12918 days ago · 1 km deep · 39 km away
55. 2.37 km W of Cobb, CaliforniaFri, May 24, 4:06 PM PDT · 12918 days ago · 0 km deep · 39 km away
56. 1.67 km W of Cobb, CaliforniaFri, May 24, 4:08 PM PDT · 12918 days ago · -1 km deep · 39 km away
57. 1.510 km SE of Hopland, CaliforniaSat, May 25, 12:00 AM PDT · 12917 days ago · 5 km deep · 22 km away
58. 1.624 km NE of Potter Valley, CaliforniaSat, May 25, 1:42 AM PDT · 12917 days ago · 10 km deep · 45 km away
59. 2.06 km SSW of Cobb, CASun, May 26, 3:13 AM PDT · 12916 days ago · 1 km deep · 47 km away
60. 2.36 km W of Cobb, CaliforniaMon, May 27, 3:35 AM PDT · 12915 days ago · 1 km deep · 39 km away

The first 60 of 163.

Before

1. 1.96 km W of Cobb, CaliforniaFri, May 3, 2:31 PM PDT · 12939 days ago · 2 km deep · 41 km away
2. 1.65 km SW of Cobb, CaliforniaFri, May 3, 11:01 AM PDT · 12939 days ago · 1 km deep · 45 km away
3. 1.54 km NE of Talmage, CaliforniaThu, May 2, 8:24 PM PDT · 12939 days ago · 8 km deep · 7 km away
4. 2.515 km NE of Angwin, CaliforniaThu, May 2, 7:16 PM PDT · 12939 days ago · 3 km deep · 80 km away
5. 1.84 km S of Cobb, CaliforniaThu, May 2, 8:30 AM PDT · 12940 days ago · 2 km deep · 48 km away
6. 1.94 km SSE of Lakeport, CaliforniaThu, May 2, 2:15 AM PDT · 12940 days ago · 4 km deep · 19 km away
7. 1.85 km W of Cobb, CaliforniaThu, May 2, 1:02 AM PDT · 12940 days ago · 0 km deep · 41 km away
8. 1.64 km SSE of Lakeport, CaliforniaWed, May 1, 1:45 PM PDT · 12941 days ago · 1 km deep · 20 km away
9. 1.94 km WSW of Cobb, CaliforniaWed, May 1, 4:14 AM PDT · 12941 days ago · 0 km deep · 42 km away
10. 1.73 km NNW of Larkfield-Wikiup, CaliforniaMon, Apr 29, 10:44 AM PDT · 12943 days ago · 0 km deep · 69 km away
11. 1.611 km SE of Hopland, CaliforniaMon, Apr 29, 12:15 AM PDT · 12943 days ago · -1 km deep · 23 km away
12. 2.05 km WSW of Cobb, CaliforniaSun, Apr 28, 11:32 AM PDT · 12944 days ago · 3 km deep · 43 km away
13. 1.98 km N of Geyserville, CaliforniaSun, Apr 28, 9:10 AM PDT · 12944 days ago · 4 km deep · 39 km away
14. 1.67 km WSW of Cobb, CaliforniaSat, Apr 27, 8:30 PM PDT · 12944 days ago · 0 km deep · 42 km away
15. 1.94 km W of Cobb, CaliforniaFri, Apr 26, 1:12 PM PDT · 12946 days ago · -1 km deep · 41 km away
16. 1.610 km SE of Willits, CaliforniaFri, Apr 26, 10:22 AM PDT · 12946 days ago · 7 km deep · 31 km away
17. 2.27 km WSW of Cobb, CaliforniaThu, Apr 25, 7:26 AM PDT · 12947 days ago · 1 km deep · 42 km away
18. 1.57 km W of Cobb, CaliforniaThu, Apr 25, 1:52 AM PDT · 12947 days ago · 3 km deep · 40 km away
19. 1.621 km NE of Potter Valley, CaliforniaWed, Apr 24, 6:07 AM PDT · 12948 days ago · 10 km deep · 41 km away
20. 1.78 km SSE of Covelo, CaliforniaTue, Apr 23, 8:55 PM PDT · 12948 days ago · 0 km deep · 70 km away

From the USGS Earthquake Hazards Program and its partner networks, event nc211897. Read Mon, Oct 5, 2026, 12:57 PM UTC.