M2.3 earthquake 6km W of Cobb, CA

Magnitude

2.3 (Md, duration), micro

Magnitude from

Northern California Seismic System

Local time

Thu, Sep 9, 2021, 9:42 AM PDT

UTC

2021-09-09 16:42:19 UTC

Depth

2.9 km (1.8 mi), shallow

Epicenter

38.825° N, 122.794° W

Region

California

Tsunami flag

No

Status

Reviewed by a seismologist

Location uncertainty

About 0.1 km horizontally, 0.2 km in depth

Magnitude uncertainty

±0.14

Depth from

From location

Station coverage gap

26°

Stations used

68

• Cobb, CaliforniaPopulation 1,778. Forecast6 kmW
• Clearlake, CaliforniaPopulation 15,182. Forecast21 kmSW
• Santa Rosa, CaliforniaPopulation 178,127. Forecast43 kmN
• Los Angeles, CaliforniaPopulation 3,820,914. Forecast669 kmNW

After

1. 1.76km WNW of Cobb, CAThu, Sep 9, 9:08 PM PDT · 1850 days ago · 2 km deep · 1 km away
2. 1.63km SSE of Redwood Valley, CAFri, Sep 10, 1:23 AM PDT · 1850 days ago · 6 km deep · 58 km away
3. 2.05km ENE of Talmage, CASat, Sep 11, 2:13 AM PDT · 1849 days ago · 9 km deep · 45 km away
4. 1.714km W of Redwood Valley, CASat, Sep 11, 11:18 AM PDT · 1849 days ago · 5 km deep · 71 km away
5. 2.55km NW of The Geysers, CASat, Sep 11, 4:22 PM PDT · 1848 days ago · 2 km deep · 1 km away
6. 1.710km NNW of Redwood Valley, CAMon, Sep 13, 5:07 AM PDT · 1847 days ago · 8 km deep · 69 km away
7. 1.610km WNW of Calistoga, CATue, Sep 14, 2:04 PM PDT · 1845 days ago · 4 km deep · 26 km away · felt by 1
8. 1.86km W of Allendale, CATue, Sep 14, 10:42 PM PDT · 1845 days ago · 21 km deep · 80 km away
9. 1.712km SE of Point Arena, CAThu, Sep 16, 2:13 AM PDT · 1844 days ago · 4 km deep · 68 km away
10. 1.83km ENE of The Geysers, CAThu, Sep 16, 3:59 AM PDT · 1844 days ago · 1 km deep · 7 km away
11. 2.01km WNW of Stony Gorge Reservoir, CAThu, Sep 16, 8:47 AM PDT · 1844 days ago · 13 km deep · 88 km away
12. 2.45km WNW of The Geysers, CAThu, Sep 16, 9:38 AM PDT · 1844 days ago · 4 km deep · 3 km away
13. 1.714km SE of Lake Pillsbury, CAThu, Sep 16, 7:21 PM PDT · 1843 days ago · 1 km deep · 54 km away
14. 1.510km W of Redwood Valley, CAFri, Sep 17, 2:08 AM PDT · 1843 days ago · 5 km deep · 67 km away
15. 1.614km NNE of Brooktrails, CAFri, Sep 17, 9:51 AM PDT · 1843 days ago · 8 km deep · 95 km away
16. 1.62km NW of Anderson Springs, CAFri, Sep 17, 1:03 PM PDT · 1842 days ago · 2 km deep · 9 km away
17. 1.913km W of Alder Springs, CAFri, Sep 17, 10:11 PM PDT · 1842 days ago · 0 km deep · 93 km away
18. 1.96km ESE of Lake Pillsbury, CASat, Sep 18, 12:52 AM PDT · 1842 days ago · 5 km deep · 63 km away
19. 1.55km NW of The Geysers, CASat, Sep 18, 1:45 PM PDT · 1841 days ago · 3 km deep · 2 km away
20. 2.09km WNW of The Geysers, CASun, Sep 19, 6:11 PM PDT · 1840 days ago · 2 km deep · 4 km away
21. 1.50km WNW of The Geysers, CASun, Sep 19, 6:31 PM PDT · 1840 days ago · 1 km deep · 6 km away
22. 1.66km NW of Boonville, CASun, Sep 19, 9:23 PM PDT · 1840 days ago · 0 km deep · 60 km away
23. 1.83km SE of Larkfield-Wikiup, CATue, Sep 21, 5:19 PM PDT · 1838 days ago · 5 km deep · 37 km away · felt by 5
24. 1.610km NE of Healdsburg, CATue, Sep 21, 5:38 PM PDT · 1838 days ago · 4 km deep · 18 km away
25. 1.86km SE of Lake Pillsbury, CATue, Sep 21, 11:25 PM PDT · 1838 days ago · 2 km deep · 61 km away
26. 2.63km NW of The Geysers, CAWed, Sep 22, 11:56 AM PDT · 1837 days ago · 3 km deep · 3 km away · felt by 3
27. 1.73km SW of Anderson Springs, CAThu, Sep 23, 1:23 AM PDT · 1837 days ago · 2 km deep · 10 km away
28. 1.76km NW of The Geysers, CAThu, Sep 23, 11:21 AM PDT · 1837 days ago · 3 km deep · 1 km away
29. 1.76km NW of The Geysers, CAThu, Sep 23, 11:26 AM PDT · 1837 days ago · 3 km deep · 1 km away
30. 1.73km NNW of The Geysers, CAThu, Sep 23, 1:22 PM PDT · 1836 days ago · 1 km deep · 3 km away
31. 2.71km SSE of Vallejo, CAFri, Sep 24, 12:04 AM PDT · 1836 days ago · 11 km deep · 94 km away · felt by 481
32. 1.63km SW of Anderson Springs, CASat, Sep 25, 1:25 PM PDT · 1834 days ago · 2 km deep · 10 km away
33. 2.012km ESE of Boonville, CASat, Sep 25, 5:02 PM PDT · 1834 days ago · 0 km deep · 41 km away
34. 2.322km N of Lake Pillsbury, CASat, Sep 25, 9:16 PM PDT · 1834 days ago · 13 km deep · 89 km away · felt by 2
35. 1.63km SE of The Geysers, CASun, Sep 26, 5:52 PM PDT · 1833 days ago · 2 km deep · 9 km away
36. 1.76km SW of Calistoga, CATue, Sep 28, 6:00 PM PDT · 1831 days ago · 8 km deep · 36 km away
37. 1.91km NW of The Geysers, CATue, Sep 28, 8:53 PM PDT · 1831 days ago · 2 km deep · 5 km away
38. 1.814km SE of Lake Pillsbury, CAWed, Sep 29, 12:56 AM PDT · 1831 days ago · 7 km deep · 55 km away
39. 1.816km NE of Upper Lake, CAThu, Sep 30, 3:39 AM PDT · 1830 days ago · -1 km deep · 50 km away
40. 3.23km ESE of Santa Rosa, CAThu, Sep 30, 5:45 AM PDT · 1830 days ago · 9 km deep · 44 km away · felt by 1,048
41. 1.710km NNW of Redwood Valley, CAThu, Sep 30, 5:06 PM PDT · 1829 days ago · 6 km deep · 70 km away
42. 2.71km NE of The Geysers, CAThu, Sep 30, 10:12 PM PDT · 1829 days ago · 0 km deep · 6 km away · felt by 3
43. 1.82km SSW of Cobb, CAThu, Sep 30, 10:12 PM PDT · 1829 days ago · 1 km deep · 6 km away
44. 1.51km E of The Geysers, CAThu, Sep 30, 10:13 PM PDT · 1829 days ago · 0 km deep · 7 km away
45. 1.93km SSW of Anderson Springs, CAFri, Oct 1, 6:46 AM PDT · 1829 days ago · 2 km deep · 12 km away
46. 1.51km NNW of The Geysers, CAFri, Oct 1, 12:04 PM PDT · 1828 days ago · 1 km deep · 5 km away
47. 1.611km NE of Napa, CAFri, Oct 1, 12:27 PM PDT · 1828 days ago · 9 km deep · 73 km away
48. 1.62km N of The Geysers, CAFri, Oct 1, 8:07 PM PDT · 1828 days ago · 2 km deep · 5 km away
49. 1.910km NW of The Geysers, CASat, Oct 2, 4:37 AM PDT · 1828 days ago · 2 km deep · 4 km away
50. 1.55km WNW of The Geysers, CASat, Oct 2, 5:55 AM PDT · 1828 days ago · 1 km deep · 3 km away
51. 1.59km NE of Santa Rosa, CASat, Oct 2, 6:08 AM PDT · 1828 days ago · 4 km deep · 39 km away
52. 1.74km W of Cobb, CASat, Oct 2, 7:09 AM PDT · 1828 days ago · 2 km deep · 3 km away
53. 1.73km ENE of Talmage, CASat, Oct 2, 5:38 PM PDT · 1827 days ago · 9 km deep · 46 km away
54. 1.78km W of Cobb, CASat, Oct 2, 8:40 PM PDT · 1827 days ago · 2 km deep · 2 km away
55. 2.15km WNW of Cobb, CASun, Oct 3, 8:38 AM PDT · 1827 days ago · 2 km deep · 2 km away
56. 1.810km WNW of The Geysers, CAMon, Oct 4, 1:43 AM PDT · 1826 days ago · 3 km deep · 5 km away
57. 1.58km NW of The Geysers, CAMon, Oct 4, 8:13 PM PDT · 1825 days ago · 2 km deep · 2 km away
58. 2.28km NW of The Geysers, CAMon, Oct 4, 8:37 PM PDT · 1825 days ago · 2 km deep · 2 km away
59. 1.84km NW of The Geysers, CAMon, Oct 4, 8:58 PM PDT · 1825 days ago · 0 km deep · 2 km away
60. 2.16km SSW of Yountville, CAWed, Oct 6, 9:44 AM PDT · 1824 days ago · 8 km deep · 63 km away · felt by 4

The first 60 of 178.

Before

1. 2.15km NW of The Geysers, CAWed, Sep 8, 8:08 AM PDT · 1852 days ago · 2 km deep · 2 km away
2. 1.87km ENE of Brooktrails, CAWed, Sep 8, 8:00 AM PDT · 1852 days ago · 6 km deep · 85 km away
3. 1.77km NW of The Geysers, CAWed, Sep 8, 5:04 AM PDT · 1852 days ago · 3 km deep · 2 km away
4. 1.57km W of Cobb, CAWed, Sep 8, 3:21 AM PDT · 1852 days ago · 2 km deep · 2 km away
5. 1.83km SW of Anderson Springs, CATue, Sep 7, 2:40 PM PDT · 1852 days ago · 2 km deep · 10 km away · felt by 1
6. 1.59km WNW of Cobb, CATue, Sep 7, 12:34 AM PDT · 1853 days ago · 2 km deep · 3 km away
7. 1.66km WNW of The Geysers, CAMon, Sep 6, 8:48 PM PDT · 1853 days ago · 2 km deep · 3 km away
8. 2.07km NW of The Geysers, CAMon, Sep 6, 7:24 PM PDT · 1853 days ago · 3 km deep · 3 km away
9. 2.56km NW of The Geysers, CAMon, Sep 6, 3:34 PM PDT · 1853 days ago · 3 km deep · 2 km away · felt by 1
10. 3.17km NW of The Geysers, CAMon, Sep 6, 3:34 PM PDT · 1853 days ago · 2 km deep · 2 km away · felt by 2
11. 2.31km NNW of The Geysers, CAMon, Sep 6, 10:06 AM PDT · 1854 days ago · 1 km deep · 5 km away
12. 1.57km S of Calistoga, CAMon, Sep 6, 3:48 AM PDT · 1854 days ago · 8 km deep · 38 km away
13. 1.62km NW of The Geysers, CASun, Sep 5, 2:34 PM PDT · 1854 days ago · 2 km deep · 5 km away
14. 2.21km NW of The Geysers, CASun, Sep 5, 2:06 PM PDT · 1854 days ago · 2 km deep · 5 km away
15. 3.74km ENE of Talmage, CASat, Sep 4, 10:27 PM PDT · 1855 days ago · 10 km deep · 45 km away · felt by 199
16. 1.74km ENE of Talmage, CASat, Sep 4, 12:21 AM PDT · 1856 days ago · 6 km deep · 46 km away
17. 1.513km N of Brooktrails, CAFri, Sep 3, 5:53 PM PDT · 1856 days ago · 8 km deep · 97 km away
18. 1.813km WNW of Alder Springs, CAFri, Sep 3, 11:05 AM PDT · 1857 days ago · 3 km deep · 96 km away
19. 1.72km SW of Cobb, CAFri, Sep 3, 8:07 AM PDT · 1857 days ago · 2 km deep · 5 km away
20. 1.92km WNW of Cobb, CAFri, Sep 3, 2:25 AM PDT · 1857 days ago · 1 km deep · 4 km away

From the USGS Earthquake Hazards Program and its partner networks, event nc73622701. Read Sun, Oct 4, 2026, 6:13 AM UTC.