M1.7 earthquake 7km WSW of St. Helena, CA

Magnitude

1.7 (Md, duration), micro

Magnitude from

Northern California Seismic System

Local time

Tue, Aug 24, 2021, 11:32 PM PDT

UTC

2021-08-25 06:32:05 UTC

Depth

8.3 km (5.2 mi), shallow

Epicenter

38.488° N, 122.549° 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

±0.16

Depth from

From location

Station coverage gap

54°

Stations used

57

• Saint Helena, CaliforniaPopulation 5,814. Forecast7 kmWSW
• Santa Rosa, CaliforniaPopulation 178,127. Forecast15 kmENE
• Los Angeles, CaliforniaPopulation 3,820,914. Forecast626 kmNW

After

1. 1.611km NE of Napa, CAWed, Aug 25, 2:17 AM PDT · 1866 days ago · 10 km deep · 35 km away
2. 2.43km W of Anderson Springs, CAWed, Aug 25, 9:44 PM PDT · 1865 days ago · 2 km deep · 35 km away
3. 2.44km S of Talmage, CAThu, Aug 26, 6:15 AM PDT · 1865 days ago · 8 km deep · 86 km away · felt by 7
4. 2.510km NW of The Geysers, CAThu, Aug 26, 1:33 PM PDT · 1865 days ago · 2 km deep · 47 km away
5. 1.83km SW of Alamo, CAThu, Aug 26, 9:13 PM PDT · 1864 days ago · 12 km deep · 84 km away
6. 1.65km W of Cobb, CAFri, Aug 27, 8:12 AM PDT · 1864 days ago · 1 km deep · 42 km away
7. 2.53km ESE of Larkfield-Wikiup, CAFri, Aug 27, 11:11 AM PDT · 1864 days ago · 7 km deep · 15 km away · felt by 122
8. 1.57km WSW of St. Helena, CAFri, Aug 27, 11:27 AM PDT · 1864 days ago · 9 km deep · 1 km away
9. 2.14km S of Larkfield-Wikiup, CAFri, Aug 27, 12:11 PM PDT · 1864 days ago · 7 km deep · 18 km away · felt by 5
10. 1.91km WNW of The Geysers, CAFri, Aug 27, 12:44 PM PDT · 1864 days ago · 1 km deep · 38 km away
11. 1.66km NW of The Geysers, CASat, Aug 28, 9:14 AM PDT · 1863 days ago · 3 km deep · 43 km away
12. 1.59km WNW of Cobb, CASat, Aug 28, 3:57 PM PDT · 1863 days ago · 2 km deep · 46 km away
13. 1.97km NW of The Geysers, CASun, Aug 29, 1:09 AM PDT · 1862 days ago · 2 km deep · 44 km away
14. 2.73km WNW of Cobb, CASun, Aug 29, 12:56 PM PDT · 1862 days ago · 0 km deep · 42 km away · felt by 6
15. 2.23km WNW of Cobb, CASun, Aug 29, 12:57 PM PDT · 1862 days ago · 0 km deep · 42 km away
16. 1.93km WNW of Cobb, CASun, Aug 29, 1:47 PM PDT · 1862 days ago · 0 km deep · 42 km away
17. 1.63km WNW of Cobb, CASun, Aug 29, 3:30 PM PDT · 1862 days ago · 0 km deep · 42 km away
18. 1.91km NNE of The Geysers, CASun, Aug 29, 8:32 PM PDT · 1861 days ago · 2 km deep · 37 km away
19. 1.95km NW of The Geysers, CASun, Aug 29, 10:36 PM PDT · 1861 days ago · 2 km deep · 42 km away
20. 2.16km NW of The Geysers, CAMon, Aug 30, 9:27 AM PDT · 1861 days ago · 3 km deep · 43 km away
21. 2.514km W of Williams, CAMon, Aug 30, 2:38 PM PDT · 1861 days ago · 21 km deep · 79 km away
22. 1.73km ENE of The Geysers, CAMon, Aug 30, 2:45 PM PDT · 1861 days ago · 2 km deep · 37 km away
23. 1.810km NNE of Windsor, CATue, Aug 31, 12:22 AM PDT · 1860 days ago · 7 km deep · 23 km away
24. 3.04km ENE of Talmage, CATue, Aug 31, 1:20 PM PDT · 1860 days ago · 9 km deep · 88 km away · felt by 122
25. 1.88km NNE of Black Point-Green Point, CATue, Aug 31, 2:32 PM PDT · 1860 days ago · 8 km deep · 35 km away
26. 1.512km WNW of The Geysers, CATue, Aug 31, 5:28 PM PDT · 1860 days ago · 2 km deep · 48 km away
27. 1.610km WNW of The Geysers, CATue, Aug 31, 8:03 PM PDT · 1859 days ago · 2 km deep · 46 km away
28. 1.69km WNW of Cobb, CAWed, Sep 1, 3:20 AM PDT · 1859 days ago · 2 km deep · 46 km away
29. 1.73km SW of Angwin, CAWed, Sep 1, 1:01 PM PDT · 1859 days ago · 4 km deep · 10 km away
30. 1.77km W of Cobb, CAWed, Sep 1, 5:13 PM PDT · 1859 days ago · 2 km deep · 44 km away
31. 1.75km NW of Dublin, CAThu, Sep 2, 6:20 AM PDT · 1858 days ago · 7 km deep · 98 km away
32. 3.84km ENE of Talmage, CAThu, Sep 2, 10:44 PM PDT · 1857 days ago · 9 km deep · 88 km away · felt by 316
33. 1.92km WNW of Cobb, CAFri, Sep 3, 2:25 AM PDT · 1857 days ago · 1 km deep · 42 km away
34. 1.72km SW of Cobb, CAFri, Sep 3, 8:07 AM PDT · 1857 days ago · 2 km deep · 39 km away
35. 1.74km ENE of Talmage, CASat, Sep 4, 12:21 AM PDT · 1856 days ago · 6 km deep · 88 km away
36. 3.74km ENE of Talmage, CASat, Sep 4, 10:27 PM PDT · 1855 days ago · 10 km deep · 88 km away · felt by 199
37. 1.71km N of Bolinas, CASun, Sep 5, 10:04 AM PDT · 1855 days ago · 9 km deep · 64 km away
38. 2.21km NW of The Geysers, CASun, Sep 5, 2:06 PM PDT · 1855 days ago · 2 km deep · 38 km away
39. 1.62km NW of The Geysers, CASun, Sep 5, 2:34 PM PDT · 1855 days ago · 2 km deep · 38 km away
40. 1.57km S of Calistoga, CAMon, Sep 6, 3:48 AM PDT · 1854 days ago · 8 km deep · 5 km away
41. 2.31km NNW of The Geysers, CAMon, Sep 6, 10:06 AM PDT · 1854 days ago · 1 km deep · 38 km away
42. 3.17km NW of The Geysers, CAMon, Sep 6, 3:34 PM PDT · 1854 days ago · 2 km deep · 43 km away · felt by 2
43. 2.56km NW of The Geysers, CAMon, Sep 6, 3:34 PM PDT · 1854 days ago · 3 km deep · 43 km away · felt by 1
44. 2.07km NW of The Geysers, CAMon, Sep 6, 7:24 PM PDT · 1854 days ago · 3 km deep · 43 km away
45. 1.66km WNW of The Geysers, CAMon, Sep 6, 8:48 PM PDT · 1853 days ago · 2 km deep · 43 km away
46. 1.59km WNW of Cobb, CATue, Sep 7, 12:34 AM PDT · 1853 days ago · 2 km deep · 46 km away
47. 1.83km SW of Anderson Springs, CATue, Sep 7, 2:40 PM PDT · 1853 days ago · 2 km deep · 33 km away · felt by 1
48. 1.57km W of Cobb, CAWed, Sep 8, 3:21 AM PDT · 1852 days ago · 2 km deep · 45 km away
49. 1.77km NW of The Geysers, CAWed, Sep 8, 5:04 AM PDT · 1852 days ago · 3 km deep · 43 km away
50. 2.15km NW of The Geysers, CAWed, Sep 8, 8:08 AM PDT · 1852 days ago · 2 km deep · 42 km away
51. 2.36km W of Cobb, CAThu, Sep 9, 9:42 AM PDT · 1851 days ago · 3 km deep · 43 km away
52. 1.76km WNW of Dublin, CAThu, Sep 9, 6:56 PM PDT · 1851 days ago · 7 km deep · 98 km away · felt by 3
53. 1.76km WNW of Cobb, CAThu, Sep 9, 9:08 PM PDT · 1850 days ago · 2 km deep · 44 km away
54. 1.73km ESE of Pacheco, CAFri, Sep 10, 5:03 PM PDT · 1850 days ago · 12 km deep · 72 km away
55. 2.05km ENE of Talmage, CASat, Sep 11, 2:13 AM PDT · 1849 days ago · 9 km deep · 88 km away
56. 2.55km NW of The Geysers, CASat, Sep 11, 4:22 PM PDT · 1849 days ago · 2 km deep · 42 km away
57. 1.81km NW of Diablo, CASun, Sep 12, 5:31 AM PDT · 1848 days ago · 8 km deep · 88 km away
58. 1.610km WNW of Calistoga, CATue, Sep 14, 2:04 PM PDT · 1846 days ago · 4 km deep · 18 km away · felt by 1
59. 1.86km W of Allendale, CATue, Sep 14, 10:42 PM PDT · 1845 days ago · 21 km deep · 47 km away
60. 1.712km SE of Point Arena, CAThu, Sep 16, 2:13 AM PDT · 1844 days ago · 4 km deep · 98 km away

The first 60 of 188.

Before

1. 2.07km W of Calistoga, CAMon, Aug 23, 10:13 PM PDT · 1867 days ago · 8 km deep · 13 km away · felt by 8
2. 1.82km NW of Pacifica, CAMon, Aug 23, 6:18 PM PDT · 1868 days ago · 8 km deep · 96 km away · felt by 2
3. 1.64km SW of Colma, CAMon, Aug 23, 5:34 AM PDT · 1868 days ago · 7 km deep · 93 km away
4. 2.28km WNW of Cobb, CASun, Aug 22, 5:40 PM PDT · 1869 days ago · 2 km deep · 45 km away
5. 1.86km WNW of The Geysers, CAFri, Aug 20, 12:51 PM PDT · 1871 days ago · 3 km deep · 42 km away
6. 1.511km SW of The Geysers, CAFri, Aug 20, 11:39 AM PDT · 1871 days ago · 6 km deep · 36 km away
7. 1.911km SW of The Geysers, CAFri, Aug 20, 3:17 AM PDT · 1871 days ago · 6 km deep · 36 km away
8. 2.41km ESE of The Geysers, CAFri, Aug 20, 2:53 AM PDT · 1871 days ago · 2 km deep · 36 km away
9. 1.74km SSE of The Geysers, CAThu, Aug 19, 2:52 PM PDT · 1872 days ago · 1 km deep · 33 km away · felt by 1
10. 2.12km SSW of Bodega Bay, CAThu, Aug 19, 3:12 AM PDT · 1872 days ago · 10 km deep · 48 km away
11. 1.82km SSW of Bodega Bay, CAThu, Aug 19, 2:43 AM PDT · 1872 days ago · 10 km deep · 48 km away
12. 1.82km SSW of Bodega Bay, CAThu, Aug 19, 1:17 AM PDT · 1872 days ago · 11 km deep · 48 km away
13. 1.62km NNE of The Geysers, CAWed, Aug 18, 10:07 AM PDT · 1873 days ago · 1 km deep · 39 km away
14. 1.75km NW of The Geysers, CAMon, Aug 16, 11:27 PM PDT · 1874 days ago · 3 km deep · 42 km away
15. 2.512km ESE of Angwin, CAMon, Aug 16, 12:59 PM PDT · 1875 days ago · 0 km deep · 22 km away · felt by 5
16. 1.513km E of Angwin, CAMon, Aug 16, 12:59 PM PDT · 1875 days ago · 3 km deep · 23 km away
17. 1.81km ENE of Alamo, CAMon, Aug 16, 9:27 AM PDT · 1875 days ago · 13 km deep · 84 km away
18. 2.413km NE of Yountville, CASun, Aug 15, 6:06 PM PDT · 1876 days ago · 5 km deep · 25 km away · felt by 1
19. 1.78km NW of The Geysers, CASun, Aug 15, 11:36 AM PDT · 1876 days ago · 2 km deep · 44 km away
20. 2.46km N of Cobb, CASun, Aug 15, 8:33 AM PDT · 1876 days ago · 3 km deep · 46 km away · felt by 10

From the USGS Earthquake Hazards Program and its partner networks, event nc73615096. Read Sun, Oct 4, 2026, 2:20 PM UTC.