California earthquakes

M2.0 earthquake 10km E of Blackhawk, CA

A magnitude 2.0 earthquake struck 10km E of Blackhawk, CA on Thu, May 27, 2021, 11:50 AM PDT (18:50 UTC), 15 km (9 mi) below the surface.

A larger quake followed: M3.9 3km N of San Lorenzo, CA. This one was a foreshock.

Blackhawk forecastMore in California

Map

Where this earthquake was located, with the others nearby. Select one for its page.

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The earthquake

Magnitude
2.0 (Md, duration), micro
Magnitude from
Northern California Seismic System
Local time
UTC
2021-05-27 18:50:52 UTC
Depth
14.8 km (9.2 mi), shallow
Epicenter
37.827° N, 121.797° W
Felt reports
2
Tsunami flag
No
Status
Reviewed by a seismologist

Did you feel it?

2 people reported to the USGS what they felt; the strongest reported shaking was I, not felt shaking.

Did You Feel It? map: shaking reported by the public
Shaking reported by the public, by area. Map: USGS Did You Feel It?

How well it is located

Reviewed by a seismologist.

Location uncertainty
About 0.4 km horizontally, 0.3 km in depth
Magnitude uncertainty
±0.17
Depth from
From location
Station coverage gap
139°
Stations used
46

Nearest places

Distance and direction from each place to the epicenter, with its forecast.

Nearby

Within 100 km, magnitude 1.5 and up: 70 in the 60 days after this one and 34 in the 30 days before it.

After

  1. 1.79km NNE of Yountville, CA · 1955 days ago · 6 km deep · 84 km away
  2. 1.61km SW of Danville, CA · 1954 days ago · 10 km deep · 19 km away
  3. 2.24km WSW of Daly City, CA · 1953 days ago · 12 km deep · 65 km away · felt by 8
  4. 1.82km ENE of Oakland, CA · 1952 days ago · 10 km deep · 36 km away
  5. 2.42km ENE of Pacheco, CA · 1951 days ago · 15 km deep · 29 km away
  6. 1.67km SW of Los Altos Hills, CA · 1951 days ago · 9 km deep · 65 km away
  7. 3.69km E of Alum Rock, CA · 1949 days ago · 7 km deep · 51 km away · felt by 1,401
  8. 1.79km E of Alum Rock, CA · 1949 days ago · 6 km deep · 51 km away
  9. 2.19km E of Alum Rock, CA · 1949 days ago · 6 km deep · 51 km away · felt by 31
  10. 2.49km SE of Livermore, CA · 1946 days ago · 7 km deep · 24 km away
  11. 1.611km WSW of Saratoga, CA · 1946 days ago · 8 km deep · 72 km away
  12. 2.56km SW of Gilroy, CA · 1943 days ago · 6 km deep · 97 km away · felt by 38
  13. 1.73km N of Piedmont, CA · 1943 days ago · 6 km deep · 39 km away
  14. 1.61km W of Alamo, CA · 1942 days ago · 9 km deep · 21 km away
  15. 1.99km E of Alum Rock, CA · 1941 days ago · 7 km deep · 51 km away
  16. 1.77km SSW of Muir Beach, CA · 1940 days ago · 9 km deep · 70 km away
  17. 2.55km NE of Alum Rock, CA · 1937 days ago · 1 km deep · 48 km away · felt by 69
  18. 1.65km NE of Alum Rock, CA · 1937 days ago · 0 km deep · 48 km away
  19. 2.110km ESE of Angwin, CA · 1936 days ago · 6 km deep · 92 km away
  20. 1.614km ESE of Angwin, CA · 1936 days ago · 0 km deep · 90 km away
  21. 1.613km ESE of Angwin, CA · 1936 days ago · 0 km deep · 91 km away
  22. 1.56km WSW of Daly City, CA · 1935 days ago · 9 km deep · 67 km away
  23. 1.512km E of Angwin, CA · 1935 days ago · 8 km deep · 96 km away
  24. 1.620km SW of Gustine, CA · 1935 days ago · 1 km deep · 92 km away
  25. 1.912km NE of Milpitas, CA · 1934 days ago · 5 km deep · 37 km away
  26. 2.415km E of Seven Trees, CA · 1934 days ago · 8 km deep · 58 km away · felt by 1
  27. 2.62km ENE of Hayward, CA · 1933 days ago · 7 km deep · 30 km away · felt by 139
  28. 1.86km E of Fremont, CA · 1933 days ago · 9 km deep · 34 km away
  29. 2.115km N of Morgan Hill, CA · 1932 days ago · 1 km deep · 64 km away
  30. 1.82km ESE of Berkeley, CA · 1930 days ago · 9 km deep · 40 km away
  31. 2.820km SE of Livermore, CA · 1929 days ago · 1 km deep · 33 km away · felt by 23
  32. 2.520km SE of Livermore, CA · 1929 days ago · 1 km deep · 33 km away · felt by 8
  33. 2.03km NE of Portola Valley, CA · 1929 days ago · 4 km deep · 59 km away · felt by 2
  34. 1.714km N of Morgan Hill, CA · 1926 days ago · 5 km deep · 65 km away
  35. 2.114km N of Morgan Hill, CA · 1925 days ago · 5 km deep · 65 km away
  36. 1.816km N of Morgan Hill, CA · 1925 days ago · 5 km deep · 63 km away
  37. 1.715km E of Seven Trees, CA · 1925 days ago · 2 km deep · 60 km away
  38. 1.614km E of Angwin, CA · 1925 days ago · 5 km deep · 93 km away
  39. 1.86km ESE of Santa Rosa, CA · 1924 days ago · 9 km deep · 100 km away
  40. 3.93km N of San Lorenzo, CA · 1923 days ago · 9 km deep · 32 km away · felt by 12,071 · tsunami flag
  41. 2.49km NE of San Martin, CA · 1922 days ago · 5 km deep · 81 km away · felt by 1
  42. 2.76km SSW of San Ramon, CA · 1922 days ago · 8 km deep · 20 km away · felt by 117
  43. 1.91km NNW of Crockett, CA · 1922 days ago · 8 km deep · 45 km away · felt by 2
  44. 1.58km ENE of Gilroy, CA · 1921 days ago · 8 km deep · 92 km away
  45. 1.79km N of Boulder Creek, CA · 1921 days ago · 12 km deep · 74 km away
  46. 1.73km WNW of Castro Valley, CA · 1920 days ago · 8 km deep · 31 km away
  47. 2.09km NE of Milpitas, CA · 1919 days ago · 8 km deep · 39 km away · felt by 3
  48. 1.812km ENE of Angwin, CA · 1917 days ago · 5 km deep · 98 km away
  49. 1.615km E of Angwin, CA · 1916 days ago · 6 km deep · 92 km away
  50. 1.814km E of Angwin, CA · 1916 days ago · 0 km deep · 92 km away
  51. 1.719km SE of Livermore, CA · 1916 days ago · 2 km deep · 33 km away
  52. 3.611km ESE of Angwin, CA · 1914 days ago · 10 km deep · 93 km away · felt by 99
  53. 1.714km E of Angwin, CA · 1914 days ago · 10 km deep · 92 km away
  54. 1.712km ESE of Angwin, CA · 1914 days ago · 6 km deep · 93 km away
  55. 1.910km ESE of Angwin, CA · 1914 days ago · 6 km deep · 94 km away
  56. 1.514km E of Angwin, CA · 1914 days ago · 3 km deep · 92 km away
  57. 1.810km ESE of Angwin, CA · 1914 days ago · 6 km deep · 93 km away
  58. 2.12km ENE of Berkeley, CA · 1911 days ago · 9 km deep · 40 km away · felt by 11
  59. 1.79km NNE of Alum Rock, CA · 1911 days ago · 9 km deep · 44 km away
  60. 1.88km SW of Loyola, CA · 1911 days ago · 6 km deep · 67 km away

The first 60 of 70.

Before

  1. 1.89km E of Blackhawk, CA · 1955 days ago · 13 km deep · 1 km away
  2. 1.95km NW of Dublin, CA · 1956 days ago · 4 km deep · 19 km away
  3. 1.65km NW of Dublin, CA · 1957 days ago · 7 km deep · 20 km away
  4. 2.16km WNW of Dublin, CA · 1957 days ago · 7 km deep · 20 km away · felt by 18
  5. 2.46km SW of Gilroy, CA · 1957 days ago · 4 km deep · 97 km away · felt by 5
  6. 2.17km ESE of Roseland, CA · 1958 days ago · 10 km deep · 98 km away · felt by 2
  7. 2.25km WNW of Dublin, CA · 1958 days ago · 7 km deep · 20 km away · felt by 10
  8. 2.06km WNW of Dublin, CA · 1958 days ago · 7 km deep · 20 km away
  9. 2.25km NW of Dublin, CA · 1958 days ago · 3 km deep · 20 km away · felt by 46
  10. 1.65km NW of Dublin, CA · 1959 days ago · 6 km deep · 20 km away
  11. 1.96km SW of Gilroy, CA · 1959 days ago · 3 km deep · 97 km away · felt by 2
  12. 1.66km SE of St. Helena, CA · 1962 days ago · 10 km deep · 90 km away
  13. 1.96km SW of Clayton, CA · 1963 days ago · 12 km deep · 18 km away · felt by 4
  14. 1.72km ESE of Berkeley, CA · 1964 days ago · 9 km deep · 40 km away
  15. 1.82km ESE of Berkeley, CA · 1964 days ago · 9 km deep · 40 km away
  16. 1.616km NE of Alum Rock, CA · 1965 days ago · 3 km deep · 43 km away
  17. 1.711km W of Bonny Doon, CA · 1967 days ago · 11 km deep · 96 km away
  18. 1.54km NW of Dublin, CA · 1968 days ago · 5 km deep · 19 km away
  19. 1.61km ENE of Alameda, CA · 1969 days ago · 7 km deep · 39 km away
  20. 1.510km NE of San Martin, CA · 1969 days ago · 8 km deep · 79 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc73566241. Read Sun, Oct 4, 2026, 4:49 AM UTC.