M2.2 earthquake 4km NNE of Blackhawk, CA

Magnitude

2.2 (Md, duration), micro

Magnitude from

Northern California Seismic System

Local time

Sun, Aug 1, 2021, 3:27 AM PDT

UTC

2021-08-01 10:27:46 UTC

Depth

9.1 km (5.6 mi), shallow

Epicenter

37.850° N, 121.888° W

Region

California

Felt reports

2

Tsunami flag

No

Status

Reviewed by a seismologist

Location uncertainty

About 0.2 km horizontally, 0.3 km in depth

Magnitude uncertainty

±0.19

Depth from

From location

Station coverage gap

69°

Stations used

86

• Blackhawk, CaliforniaPopulation 9,354. Forecast4 kmNNE
• Danville, CaliforniaPopulation 44,400. Forecast10 kmENE
• Antioch, CaliforniaPopulation 110,542. Forecast19 kmSSW
• Los Angeles, CaliforniaPopulation 3,820,914. Forecast535 kmNW

After

1. 2.915km E of Seven Trees, CAMon, Aug 2, 4:05 PM PDT · 1888 days ago · 6 km deep · 64 km away · felt by 50
2. 2.29km ENE of San Martin, CATue, Aug 3, 6:57 PM PDT · 1887 days ago · 6 km deep · 86 km away · felt by 1
3. 1.87km S of Muir Beach, CAWed, Aug 4, 1:03 PM PDT · 1886 days ago · 13 km deep · 62 km away
4. 1.54km E of Moraga, CAThu, Aug 5, 2:22 PM PDT · 1885 days ago · 3 km deep · 17 km away
5. 1.911km NE of Milpitas, CAFri, Aug 6, 1:17 AM PDT · 1885 days ago · 5 km deep · 39 km away · felt by 3
6. 1.52km ESE of Berkeley, CAFri, Aug 6, 11:01 AM PDT · 1884 days ago · 4 km deep · 32 km away
7. 2.29km NE of Gilroy, CAFri, Aug 6, 5:57 PM PDT · 1884 days ago · 3 km deep · 93 km away
8. 2.22km E of Saratoga, CASun, Aug 8, 3:24 AM PDT · 1882 days ago · 7 km deep · 66 km away · felt by 48
9. 2.45km SE of Portola Valley, CASun, Aug 8, 9:07 AM PDT · 1882 days ago · 10 km deep · 62 km away · felt by 12
10. 2.115km ENE of Alum Rock, CASun, Aug 8, 1:31 PM PDT · 1882 days ago · 5 km deep · 51 km away · felt by 3
11. 2.01km NNW of Pleasant Hill, CAMon, Aug 9, 11:29 PM PDT · 1881 days ago · 11 km deep · 20 km away · felt by 12
12. 2.18km ENE of Alum Rock, CAWed, Aug 11, 6:37 AM PDT · 1879 days ago · 7 km deep · 54 km away
13. 1.810km NE of Napa, CAWed, Aug 11, 7:03 AM PDT · 1879 days ago · 13 km deep · 62 km away
14. 1.615km E of Seven Trees, CAThu, Aug 12, 1:15 AM PDT · 1879 days ago · 7 km deep · 64 km away
15. 1.61km NE of Berkeley, CAThu, Aug 12, 5:32 AM PDT · 1878 days ago · 6 km deep · 33 km away
16. 1.55km E of Fremont, CAFri, Aug 13, 6:05 AM PDT · 1877 days ago · 7 km deep · 34 km away
17. 1.75km WNW of Dublin, CASat, Aug 14, 5:01 PM PDT · 1876 days ago · 6 km deep · 16 km away
18. 2.413km NE of Yountville, CASun, Aug 15, 6:06 PM PDT · 1875 days ago · 5 km deep · 79 km away · felt by 1
19. 1.81km ENE of Alamo, CAMon, Aug 16, 9:27 AM PDT · 1874 days ago · 13 km deep · 12 km away
20. 1.513km E of Angwin, CAMon, Aug 16, 12:59 PM PDT · 1874 days ago · 3 km deep · 87 km away
21. 2.512km ESE of Angwin, CAMon, Aug 16, 12:59 PM PDT · 1874 days ago · 0 km deep · 86 km away · felt by 5
22. 1.64km SW of Colma, CAMon, Aug 23, 5:34 AM PDT · 1867 days ago · 7 km deep · 57 km away
23. 1.82km NW of Pacifica, CAMon, Aug 23, 6:18 PM PDT · 1867 days ago · 8 km deep · 60 km away · felt by 2
24. 2.115km E of Seven Trees, CAMon, Aug 23, 6:37 PM PDT · 1867 days ago · 4 km deep · 65 km away · felt by 1
25. 1.815km E of Seven Trees, CAMon, Aug 23, 6:46 PM PDT · 1867 days ago · 3 km deep · 65 km away
26. 1.77km WSW of St. Helena, CATue, Aug 24, 11:32 PM PDT · 1866 days ago · 8 km deep · 92 km away
27. 1.611km NE of Napa, CAWed, Aug 25, 2:17 AM PDT · 1865 days ago · 10 km deep · 62 km away
28. 1.83km SW of Alamo, CAThu, Aug 26, 9:13 PM PDT · 1864 days ago · 12 km deep · 15 km away
29. 1.57km WSW of St. Helena, CAFri, Aug 27, 11:27 AM PDT · 1863 days ago · 9 km deep · 90 km away
30. 1.78km SSW of Livermore, CASat, Aug 28, 9:50 PM PDT · 1862 days ago · 10 km deep · 28 km away
31. 1.815km E of Seven Trees, CAMon, Aug 30, 5:14 AM PDT · 1860 days ago · 3 km deep · 65 km away
32. 1.915km E of Seven Trees, CATue, Aug 31, 1:15 AM PDT · 1860 days ago · 4 km deep · 65 km away
33. 2.411km NE of Milpitas, CATue, Aug 31, 11:27 AM PDT · 1859 days ago · 4 km deep · 39 km away
34. 1.88km NNE of Black Point-Green Point, CATue, Aug 31, 2:32 PM PDT · 1859 days ago · 8 km deep · 63 km away
35. 1.73km SW of Angwin, CAWed, Sep 1, 1:01 PM PDT · 1858 days ago · 4 km deep · 94 km away
36. 2.66km S of Livermore, CAWed, Sep 1, 4:13 PM PDT · 1858 days ago · 4 km deep · 27 km away · felt by 81
37. 1.75km NW of Dublin, CAThu, Sep 2, 6:20 AM PDT · 1857 days ago · 7 km deep · 16 km away
38. 2.014km N of Morgan Hill, CAFri, Sep 3, 1:09 PM PDT · 1856 days ago · 4 km deep · 70 km away · felt by 2
39. 1.910km NE of Milpitas, CASat, Sep 4, 12:25 PM PDT · 1855 days ago · 4 km deep · 39 km away
40. 1.71km N of Bolinas, CASun, Sep 5, 10:04 AM PDT · 1854 days ago · 9 km deep · 70 km away
41. 1.57km S of Calistoga, CAMon, Sep 6, 3:48 AM PDT · 1853 days ago · 8 km deep · 97 km away
42. 1.76km WNW of Dublin, CAThu, Sep 9, 6:56 PM PDT · 1850 days ago · 7 km deep · 16 km away · felt by 3
43. 1.73km ESE of Pacheco, CAFri, Sep 10, 5:03 PM PDT · 1849 days ago · 12 km deep · 20 km away
44. 1.81km NW of Diablo, CASun, Sep 12, 5:31 AM PDT · 1847 days ago · 8 km deep · 7 km away
45. 2.910km NE of Milpitas, CATue, Sep 14, 11:45 AM PDT · 1845 days ago · 5 km deep · 40 km away · felt by 139
46. 1.86km W of Allendale, CATue, Sep 14, 10:42 PM PDT · 1845 days ago · 21 km deep · 67 km away
47. 2.38km ESE of Fremont, CAWed, Sep 15, 7:08 PM PDT · 1844 days ago · 7 km deep · 36 km away · felt by 6
48. 3.16km WNW of Dublin, CASat, Sep 18, 5:09 PM PDT · 1841 days ago · 7 km deep · 16 km away · felt by 379
49. 1.56km WNW of Dublin, CASat, Sep 18, 5:10 PM PDT · 1841 days ago · 6 km deep · 16 km away
50. 2.49km ESE of Fremont, CASun, Sep 19, 2:21 AM PDT · 1840 days ago · 7 km deep · 36 km away · felt by 8
51. 1.65km NW of Dublin, CASun, Sep 19, 12:50 PM PDT · 1840 days ago · 6 km deep · 16 km away
52. 1.53km NNW of Union City, CATue, Sep 21, 6:01 AM PDT · 1838 days ago · 3 km deep · 28 km away
53. 1.75km NW of Dublin, CATue, Sep 21, 11:39 PM PDT · 1838 days ago · 5 km deep · 16 km away
54. 2.59km ENE of Milpitas, CAWed, Sep 22, 10:16 AM PDT · 1837 days ago · 7 km deep · 44 km away · felt by 23
55. 1.94km SW of Newark, CAWed, Sep 22, 11:46 PM PDT · 1837 days ago · 12 km deep · 42 km away · felt by 2
56. 1.85km WNW of Dublin, CAThu, Sep 23, 5:18 PM PDT · 1836 days ago · 7 km deep · 17 km away · felt by 1
57. 1.81km WNW of Walnut Creek, CAThu, Sep 23, 6:44 PM PDT · 1836 days ago · 11 km deep · 18 km away · felt by 2
58. 2.71km SSE of Vallejo, CAFri, Sep 24, 12:04 AM PDT · 1836 days ago · 11 km deep · 41 km away · felt by 481
59. 2.12km E of Hayward, CASat, Sep 25, 9:39 AM PDT · 1834 days ago · 3 km deep · 27 km away · felt by 22
60. 1.514km SW of Portola Valley, CAMon, Sep 27, 6:48 PM PDT · 1832 days ago · 4 km deep · 73 km away

The first 60 of 62.

Before

1. 2.54km NNE of Blackhawk, CASat, Jul 31, 10:38 PM PDT · 1890 days ago · 8 km deep · 0 km away · felt by 32
2. 2.04km NE of Blackhawk, CASat, Jul 31, 6:48 PM PDT · 1890 days ago · 8 km deep · 1 km away
3. 1.94km SSW of Colma, CASat, Jul 31, 4:49 AM PDT · 1890 days ago · 6 km deep · 57 km away · felt by 2
4. 1.516km SSE of Livermore, CASat, Jul 31, 4:04 AM PDT · 1890 days ago · 3 km deep · 38 km away
5. 2.08km ENE of Interlaken, CATue, Jul 27, 3:42 PM PDT · 1894 days ago · 5 km deep · 98 km away
6. 2.32km WNW of Concord, CATue, Jul 27, 12:46 PM PDT · 1894 days ago · 17 km deep · 19 km away · felt by 4
7. 2.16km SSW of Calistoga, CAMon, Jul 26, 3:35 AM PDT · 1895 days ago · 9 km deep · 97 km away · felt by 4
8. 1.72km E of Berkeley, CAMon, Jul 26, 12:44 AM PDT · 1896 days ago · 9 km deep · 32 km away
9. 1.85km E of Fremont, CASun, Jul 25, 5:16 PM PDT · 1896 days ago · 9 km deep · 35 km away
10. 2.18km S of Muir Beach, CASun, Jul 25, 9:11 AM PDT · 1896 days ago · 4 km deep · 60 km away · felt by 2
11. 1.68km S of Muir Beach, CASat, Jul 24, 5:41 PM PDT · 1897 days ago · 5 km deep · 61 km away
12. 1.611km ENE of Yountville, CASat, Jul 24, 10:13 AM PDT · 1897 days ago · 6 km deep · 71 km away
13. 1.73km NNW of Byron, CAWed, Jul 21, 7:11 AM PDT · 1900 days ago · 4 km deep · 22 km away
14. 1.97km ESE of Roseland, CATue, Jul 20, 10:36 PM PDT · 1901 days ago · 9 km deep · 90 km away
15. 1.610km ESE of Angwin, CASun, Jul 18, 9:24 PM PDT · 1903 days ago · 4 km deep · 86 km away
16. 1.63km NNW of Piedmont, CASat, Jul 17, 6:42 AM PDT · 1904 days ago · 8 km deep · 31 km away
17. 1.613km N of Morgan Hill, CAThu, Jul 15, 10:00 PM PDT · 1906 days ago · 4 km deep · 71 km away
18. 1.88km SW of Loyola, CASun, Jul 11, 9:55 AM PDT · 1910 days ago · 6 km deep · 66 km away
19. 1.79km NNE of Alum Rock, CASun, Jul 11, 7:08 AM PDT · 1910 days ago · 9 km deep · 48 km away
20. 2.12km ENE of Berkeley, CASun, Jul 11, 3:42 AM PDT · 1910 days ago · 9 km deep · 32 km away · felt by 11

From the USGS Earthquake Hazards Program and its partner networks, event nc73603781. Read Sat, Oct 3, 2026, 8:32 PM UTC.