M1.6 earthquake 6km NW of Boonville, CA

Magnitude

1.6 (Md, duration), micro

Magnitude from

Northern California Seismic System

Local time

Sun, Sep 19, 2021, 9:23 PM PDT

UTC

2021-09-20 04:23:57 UTC

Depth

-0.5 km (-0.3 mi), shallow

Epicenter

39.046° N, 123.423° W

Region

California

Tsunami flag

No

Status

Reviewed by a seismologist

Location uncertainty

About 0.2 km horizontally, 0.5 km in depth

Magnitude uncertainty

±0.19

Depth from

From location

Station coverage gap

86°

Stations used

19

• Boonville, CaliforniaPopulation 1,035. Forecast6 kmNW
• Ukiah, CaliforniaPopulation 15,917. Forecast22 kmWSW
• Santa Rosa, CaliforniaPopulation 178,127. Forecast91 kmNW
• Los Angeles, CaliforniaPopulation 3,820,914. Forecast723 kmNW

After

1. 1.83km SE of Larkfield-Wikiup, CATue, Sep 21, 5:19 PM PDT · 1839 days ago · 5 km deep · 86 km away · felt by 5
2. 1.610km NE of Healdsburg, CATue, Sep 21, 5:38 PM PDT · 1839 days ago · 4 km deep · 71 km away
3. 1.86km SE of Lake Pillsbury, CATue, Sep 21, 11:25 PM PDT · 1839 days ago · 2 km deep · 57 km away
4. 2.63km NW of The Geysers, CAWed, Sep 22, 11:56 AM PDT · 1838 days ago · 3 km deep · 62 km away · felt by 3
5. 1.73km SW of Anderson Springs, CAThu, Sep 23, 1:23 AM PDT · 1838 days ago · 2 km deep · 69 km away
6. 1.76km NW of The Geysers, CAThu, Sep 23, 11:21 AM PDT · 1837 days ago · 3 km deep · 59 km away
7. 1.76km NW of The Geysers, CAThu, Sep 23, 11:26 AM PDT · 1837 days ago · 3 km deep · 59 km away
8. 1.73km NNW of The Geysers, CAThu, Sep 23, 1:22 PM PDT · 1837 days ago · 1 km deep · 63 km away
9. 2.16km SW of Laytonville, CAThu, Sep 23, 1:24 PM PDT · 1837 days ago · 3 km deep · 67 km away
10. 1.63km SW of Anderson Springs, CASat, Sep 25, 1:25 PM PDT · 1835 days ago · 2 km deep · 69 km away
11. 2.012km ESE of Boonville, CASat, Sep 25, 5:02 PM PDT · 1835 days ago · 0 km deep · 19 km away
12. 2.322km N of Lake Pillsbury, CASat, Sep 25, 9:16 PM PDT · 1835 days ago · 13 km deep · 72 km away · felt by 2
13. 1.63km SE of The Geysers, CASun, Sep 26, 5:52 PM PDT · 1834 days ago · 2 km deep · 68 km away
14. 1.76km SW of Calistoga, CATue, Sep 28, 6:00 PM PDT · 1832 days ago · 8 km deep · 90 km away
15. 1.91km NW of The Geysers, CATue, Sep 28, 8:53 PM PDT · 1832 days ago · 2 km deep · 64 km away
16. 1.814km SE of Lake Pillsbury, CAWed, Sep 29, 12:56 AM PDT · 1832 days ago · 7 km deep · 58 km away
17. 1.816km NE of Upper Lake, CAThu, Sep 30, 3:39 AM PDT · 1831 days ago · -1 km deep · 61 km away
18. 3.23km ESE of Santa Rosa, CAThu, Sep 30, 5:45 AM PDT · 1831 days ago · 9 km deep · 94 km away · felt by 1,048
19. 1.710km NNW of Redwood Valley, CAThu, Sep 30, 5:06 PM PDT · 1830 days ago · 6 km deep · 36 km away
20. 2.71km NE of The Geysers, CAThu, Sep 30, 10:12 PM PDT · 1830 days ago · 0 km deep · 65 km away · felt by 3
21. 1.82km SSW of Cobb, CAThu, Sep 30, 10:12 PM PDT · 1830 days ago · 1 km deep · 65 km away
22. 1.51km E of The Geysers, CAThu, Sep 30, 10:13 PM PDT · 1830 days ago · 0 km deep · 66 km away
23. 1.93km SSW of Anderson Springs, CAFri, Oct 1, 6:46 AM PDT · 1830 days ago · 2 km deep · 71 km away
24. 1.51km NNW of The Geysers, CAFri, Oct 1, 12:04 PM PDT · 1829 days ago · 1 km deep · 64 km away
25. 1.62km N of The Geysers, CAFri, Oct 1, 8:07 PM PDT · 1829 days ago · 2 km deep · 64 km away
26. 1.910km NW of The Geysers, CASat, Oct 2, 4:37 AM PDT · 1829 days ago · 2 km deep · 56 km away
27. 2.314km SE of Rockport, CASat, Oct 2, 4:44 AM PDT · 1829 days ago · 0 km deep · 71 km away
28. 1.55km WNW of The Geysers, CASat, Oct 2, 5:55 AM PDT · 1829 days ago · 1 km deep · 60 km away
29. 1.59km NE of Santa Rosa, CASat, Oct 2, 6:08 AM PDT · 1829 days ago · 4 km deep · 92 km away
30. 1.74km W of Cobb, CASat, Oct 2, 7:09 AM PDT · 1829 days ago · 2 km deep · 62 km away
31. 1.73km ENE of Talmage, CASat, Oct 2, 5:38 PM PDT · 1828 days ago · 9 km deep · 27 km away
32. 1.78km W of Cobb, CASat, Oct 2, 8:40 PM PDT · 1828 days ago · 2 km deep · 58 km away
33. 2.15km WNW of Cobb, CASun, Oct 3, 8:38 AM PDT · 1828 days ago · 2 km deep · 60 km away
34. 1.810km WNW of The Geysers, CAMon, Oct 4, 1:43 AM PDT · 1827 days ago · 3 km deep · 55 km away
35. 1.58km NW of The Geysers, CAMon, Oct 4, 8:13 PM PDT · 1826 days ago · 2 km deep · 58 km away
36. 2.28km NW of The Geysers, CAMon, Oct 4, 8:37 PM PDT · 1826 days ago · 2 km deep · 58 km away
37. 1.84km NW of The Geysers, CAMon, Oct 4, 8:58 PM PDT · 1826 days ago · 0 km deep · 61 km away
38. 1.69km W of Cobb, CAWed, Oct 6, 10:13 AM PDT · 1824 days ago · 2 km deep · 57 km away
39. 1.912km SE of Covelo, CAWed, Oct 6, 3:50 PM PDT · 1824 days ago · -1 km deep · 77 km away
40. 2.010km N of Lake Pillsbury, CAWed, Oct 6, 11:55 PM PDT · 1824 days ago · 8 km deep · 64 km away
41. 1.713km SSE of Point Arena, CAThu, Oct 7, 11:42 AM PDT · 1823 days ago · 1 km deep · 31 km away
42. 1.89km WNW of Cobb, CAThu, Oct 7, 4:28 PM PDT · 1823 days ago · 3 km deep · 57 km away
43. 1.97km W of Cobb, CAThu, Oct 7, 9:13 PM PDT · 1823 days ago · 2 km deep · 59 km away · felt by 1
44. 1.78km NW of The Geysers, CAThu, Oct 7, 11:22 PM PDT · 1823 days ago · 2 km deep · 58 km away
45. 1.69km WNW of The Geysers, CAFri, Oct 8, 7:28 PM PDT · 1822 days ago · 3 km deep · 56 km away
46. 1.66km NE of Willits, CAFri, Oct 8, 11:16 PM PDT · 1822 days ago · 6 km deep · 47 km away
47. 1.91km ESE of The Geysers, CASat, Oct 9, 7:07 AM PDT · 1822 days ago · 0 km deep · 66 km away
48. 2.61km NW of The Geysers, CASat, Oct 9, 3:51 PM PDT · 1821 days ago · 2 km deep · 64 km away · felt by 2
49. 2.61km NW of The Geysers, CASat, Oct 9, 9:38 PM PDT · 1821 days ago · 2 km deep · 64 km away · felt by 7
50. 1.73km N of The Geysers, CASat, Oct 9, 10:08 PM PDT · 1821 days ago · 0 km deep · 63 km away
51. 1.811km N of Lake Pillsbury, CASun, Oct 10, 2:40 PM PDT · 1820 days ago · 4 km deep · 65 km away · felt by 2
52. 2.111km N of Lake Pillsbury, CASun, Oct 10, 7:52 PM PDT · 1820 days ago · 6 km deep · 64 km away
53. 1.98km NW of The Geysers, CAMon, Oct 11, 9:13 AM PDT · 1819 days ago · 2 km deep · 58 km away
54. 2.011km N of Lake Pillsbury, CAMon, Oct 11, 10:38 AM PDT · 1819 days ago · 7 km deep · 64 km away
55. 1.71km ESE of The Geysers, CAMon, Oct 11, 6:19 PM PDT · 1819 days ago · 0 km deep · 66 km away
56. 1.82km NE of The Geysers, CAMon, Oct 11, 9:17 PM PDT · 1819 days ago · 2 km deep · 66 km away
57. 1.62km NE of The Geysers, CAMon, Oct 11, 9:17 PM PDT · 1819 days ago · 1 km deep · 66 km away
58. 1.77km NW of The Geysers, CAMon, Oct 11, 11:31 PM PDT · 1819 days ago · 2 km deep · 59 km away
59. 1.97km NW of The Geysers, CATue, Oct 12, 2:38 AM PDT · 1819 days ago · 3 km deep · 59 km away · felt by 1
60. 2.112km SE of Talmage, CATue, Oct 12, 4:14 AM PDT · 1819 days ago · 4 km deep · 29 km away

The first 60 of 183.

Before

1. 1.50km WNW of The Geysers, CASun, Sep 19, 6:31 PM PDT · 1841 days ago · 1 km deep · 65 km away
2. 2.09km WNW of The Geysers, CASun, Sep 19, 6:11 PM PDT · 1841 days ago · 2 km deep · 56 km away
3. 1.55km NW of The Geysers, CASat, Sep 18, 1:45 PM PDT · 1842 days ago · 3 km deep · 60 km away
4. 1.96km ESE of Lake Pillsbury, CASat, Sep 18, 12:52 AM PDT · 1843 days ago · 5 km deep · 58 km away
5. 1.913km W of Alder Springs, CAFri, Sep 17, 10:11 PM PDT · 1843 days ago · 0 km deep · 83 km away
6. 1.62km NW of Anderson Springs, CAFri, Sep 17, 1:03 PM PDT · 1843 days ago · 2 km deep · 69 km away
7. 1.614km NNE of Brooktrails, CAFri, Sep 17, 9:51 AM PDT · 1843 days ago · 8 km deep · 58 km away
8. 1.510km W of Redwood Valley, CAFri, Sep 17, 2:08 AM PDT · 1844 days ago · 5 km deep · 26 km away
9. 1.714km SE of Lake Pillsbury, CAThu, Sep 16, 7:21 PM PDT · 1844 days ago · 1 km deep · 56 km away
10. 2.45km WNW of The Geysers, CAThu, Sep 16, 9:38 AM PDT · 1844 days ago · 4 km deep · 60 km away
11. 2.01km WNW of Stony Gorge Reservoir, CAThu, Sep 16, 8:47 AM PDT · 1845 days ago · 13 km deep · 97 km away
12. 1.83km ENE of The Geysers, CAThu, Sep 16, 3:59 AM PDT · 1845 days ago · 1 km deep · 67 km away
13. 1.712km SE of Point Arena, CAThu, Sep 16, 2:13 AM PDT · 1845 days ago · 4 km deep · 25 km away
14. 1.610km WNW of Calistoga, CATue, Sep 14, 2:04 PM PDT · 1846 days ago · 4 km deep · 80 km away · felt by 1
15. 1.710km NNW of Redwood Valley, CAMon, Sep 13, 5:07 AM PDT · 1848 days ago · 8 km deep · 38 km away
16. 2.55km NW of The Geysers, CASat, Sep 11, 4:22 PM PDT · 1849 days ago · 2 km deep · 60 km away
17. 1.58km NNW of Laytonville, CASat, Sep 11, 1:23 PM PDT · 1849 days ago · 10 km deep · 79 km away
18. 1.714km W of Redwood Valley, CASat, Sep 11, 11:18 AM PDT · 1849 days ago · 5 km deep · 26 km away
19. 2.38km NW of Laytonville, CASat, Sep 11, 7:45 AM PDT · 1850 days ago · 8 km deep · 78 km away
20. 2.422km N of Laytonville, CASat, Sep 11, 7:25 AM PDT · 1850 days ago · 6 km deep · 93 km away · felt by 1

From the USGS Earthquake Hazards Program and its partner networks, event nc73626956. Read Mon, Oct 5, 2026, 3:41 AM UTC.