M2.5 earthquake 8 km NE of Blackhawk, California

Magnitude

2.5 (md), micro

Local time

Fri, Jul 4, 1986, 7:27 AM PDT

UTC

1986-07-04 14:27:46 UTC

Depth

8.6 km (5.3 mi), shallow

Epicenter

37.880° N, 121.847° W

Region

California

Tsunami flag

No

Status

Reviewed by a seismologist

Location uncertainty

About 0.1 km horizontally, 0.3 km in depth

Magnitude uncertainty

±0.16

Depth from

From location

Station coverage gap

75°

Stations used

40

• Blackhawk, CaliforniaPopulation 9,354. Forecast8 kmNE
• Clayton, CaliforniaPopulation 11,867. Forecast10 kmSE
• Antioch, CaliforniaPopulation 110,542. Forecast14 kmSSW
• Los Angeles, CaliforniaPopulation 3,820,914. Forecast535 kmNW

After

1. 1.97 km E of East Foothills, CaliforniaSat, Jul 5, 2:00 AM PDT · 14696 days ago · 8 km deep · 57 km away
2. 1.65 km NE of Tracy, CaliforniaSat, Jul 5, 5:01 AM PDT · 14696 days ago · 13 km deep · 42 km away
3. 1.813 km N of Morgan Hill, CaliforniaSat, Jul 5, 7:26 AM PDT · 14696 days ago · 4 km deep · 73 km away
4. 1.613 km ENE of East Foothills, CaliforniaSat, Jul 5, 6:44 PM PDT · 14695 days ago · 6 km deep · 52 km away
5. 1.9Northern CaliforniaWed, Jul 9, 2:12 AM PDT · 14692 days ago · 14 km deep · 38 km away
6. 1.818 km NE of East Foothills, CaliforniaWed, Jul 9, 4:02 AM PDT · 14692 days ago · 8 km deep · 43 km away
7. 1.68 km ENE of Gilroy, CaliforniaThu, Jul 10, 12:43 PM PDT · 14691 days ago · 4 km deep · 98 km away
8. 1.6Northern CaliforniaThu, Jul 10, 3:12 PM PDT · 14690 days ago · 7 km deep · 43 km away
9. 1.519 km SSE of Livermore, CaliforniaFri, Jul 11, 6:30 AM PDT · 14690 days ago · 7 km deep · 42 km away
10. 1.813 km NE of East Foothills, CaliforniaSat, Jul 12, 12:06 AM PDT · 14689 days ago · 3 km deep · 49 km away
11. 2.918 km NE of East Foothills, CaliforniaSat, Jul 12, 1:04 AM PDT · 14689 days ago · 7 km deep · 43 km away
12. 1.74 km WNW of Broadmoor, CaliforniaSat, Jul 12, 1:46 PM PDT · 14688 days ago · 4 km deep · 64 km away
13. 1.94 km E of Empire, CaliforniaMon, Jul 14, 12:06 PM PDT · 14687 days ago · 20 km deep · 91 km away
14. 1.616 km NE of East Foothills, CaliforniaMon, Jul 14, 12:27 PM PDT · 14687 days ago · 1 km deep · 45 km away
15. 1.914 km N of Morgan Hill, CaliforniaMon, Jul 14, 2:52 PM PDT · 14686 days ago · 5 km deep · 71 km away
16. 1.75 km NE of East Foothills, CaliforniaTue, Jul 15, 10:58 AM PDT · 14686 days ago · 6 km deep · 52 km away
17. 1.519 km SSE of Livermore, CaliforniaTue, Jul 15, 11:09 AM PDT · 14686 days ago · 2 km deep · 42 km away
18. 2.74 km S of San Ramon, CaliforniaWed, Jul 16, 9:27 AM PDT · 14685 days ago · 8 km deep · 19 km away
19. 3.015 km E of Seven Trees, CaliforniaWed, Jul 16, 1:59 PM PDT · 14684 days ago · 6 km deep · 68 km away
20. 1.613 km ESE of East Foothills, CaliforniaWed, Jul 16, 3:28 PM PDT · 14684 days ago · 3 km deep · 60 km away
21. 1.74 km E of South San Francisco, CaliforniaWed, Jul 16, 6:26 PM PDT · 14684 days ago · 10 km deep · 51 km away
22. 1.64 km S of San Ramon, CaliforniaWed, Jul 16, 6:57 PM PDT · 14684 days ago · 7 km deep · 19 km away
23. 1.918 km NE of East Foothills, CaliforniaWed, Jul 16, 10:39 PM PDT · 14684 days ago · 7 km deep · 42 km away
24. 1.613 km ENE of East Foothills, CaliforniaThu, Jul 17, 6:51 AM PDT · 14684 days ago · 6 km deep · 51 km away
25. 1.519 km SSE of Livermore, CaliforniaThu, Jul 17, 10:33 AM PDT · 14684 days ago · 7 km deep · 42 km away
26. 1.712 km ENE of East Foothills, CaliforniaThu, Jul 17, 8:52 PM PDT · 14683 days ago · 7 km deep · 52 km away
27. 1.910 km ENE of Blackhawk, CaliforniaThu, Jul 17, 11:29 PM PDT · 14683 days ago · 10 km deep · 6 km away
28. 2.114 km WNW of Westley, CaliforniaFri, Jul 18, 2:48 PM PDT · 14682 days ago · 0 km deep · 53 km away
29. 1.918 km NE of East Foothills, CaliforniaSat, Jul 19, 6:11 AM PDT · 14682 days ago · 7 km deep · 44 km away
30. 1.73 km S of San Ramon, CaliforniaSat, Jul 19, 11:46 PM PDT · 14681 days ago · 8 km deep · 19 km away
31. 2.71 km WSW of Portola Valley, CaliforniaSun, Jul 20, 6:32 PM PDT · 14680 days ago · 10 km deep · 66 km away
32. 1.612 km NE of East Foothills, CaliforniaMon, Jul 21, 6:16 PM PDT · 14679 days ago · 5 km deep · 47 km away
33. 1.58 km S of Byron, CaliforniaWed, Jul 23, 8:12 AM PDT · 14678 days ago · 5 km deep · 19 km away
34. 1.918 km NE of East Foothills, CaliforniaWed, Jul 23, 8:21 AM PDT · 14678 days ago · 7 km deep · 43 km away
35. 1.55 km SSE of Byron, CaliforniaWed, Jul 23, 8:33 AM PDT · 14678 days ago · 10 km deep · 21 km away
36. 2.018 km NE of East Foothills, CaliforniaWed, Jul 23, 6:57 PM PDT · 14677 days ago · 7 km deep · 44 km away
37. 1.916 km E of Seven Trees, CaliforniaWed, Jul 23, 8:40 PM PDT · 14677 days ago · 4 km deep · 66 km away
38. 2.610 km ESE of East Foothills, CaliforniaThu, Jul 24, 12:52 AM PDT · 14677 days ago · 8 km deep · 61 km away
39. 1.618 km NE of East Foothills, CaliforniaThu, Jul 24, 2:55 AM PDT · 14677 days ago · 7 km deep · 43 km away
40. 2.314 km E of Seven Trees, CaliforniaFri, Jul 25, 2:22 AM PDT · 14676 days ago · 3 km deep · 67 km away
41. 2.515 km E of Seven Trees, CaliforniaFri, Jul 25, 2:23 AM PDT · 14676 days ago · 3 km deep · 67 km away
42. 2.019 km NE of East Foothills, CaliforniaFri, Jul 25, 12:56 PM PDT · 14676 days ago · 6 km deep · 44 km away
43. 1.616 km ESE of Livermore, CaliforniaFri, Jul 25, 9:15 PM PDT · 14675 days ago · 14 km deep · 37 km away
44. 3.318 km NE of East Foothills, CaliforniaSat, Jul 26, 12:12 AM PDT · 14675 days ago · 8 km deep · 43 km away
45. 1.71 km W of Portola Valley, CaliforniaSat, Jul 26, 2:26 PM PDT · 14674 days ago · 11 km deep · 66 km away
46. 1.612 km ENE of East Foothills, CaliforniaSat, Jul 26, 6:35 PM PDT · 14674 days ago · 6 km deep · 52 km away
47. 2.118 km NE of East Foothills, CaliforniaSun, Jul 27, 2:29 PM PDT · 14673 days ago · 7 km deep · 43 km away
48. 3.018 km NE of East Foothills, CaliforniaSun, Jul 27, 3:58 PM PDT · 14673 days ago · 8 km deep · 43 km away
49. 1.514 km SSE of Livermore, CaliforniaMon, Jul 28, 1:11 AM PDT · 14673 days ago · 2 km deep · 37 km away
50. 2.218 km NE of East Foothills, CaliforniaMon, Jul 28, 8:42 PM PDT · 14672 days ago · 6 km deep · 43 km away
51. 2.211 km NNE of Morgan Hill, CaliforniaTue, Jul 29, 1:04 AM PDT · 14672 days ago · 5 km deep · 74 km away
52. 1.50 km SSE of North Gate, CaliforniaTue, Jul 29, 11:33 AM PDT · 14672 days ago · 10 km deep · 13 km away
53. 1.614 km N of Morgan Hill, CaliforniaTue, Jul 29, 4:49 PM PDT · 14671 days ago · 5 km deep · 72 km away
54. 1.67 km WSW of Kenwood, CaliforniaWed, Jul 30, 12:10 AM PDT · 14671 days ago · 1 km deep · 88 km away
55. 2.16 km NNE of Interlaken, CaliforniaWed, Jul 30, 3:42 AM PDT · 14671 days ago · 8 km deep · 98 km away
56. 2.018 km NE of East Foothills, CaliforniaWed, Jul 30, 7:57 PM PDT · 14670 days ago · 6 km deep · 44 km away
57. 1.618 km NE of East Foothills, CaliforniaThu, Jul 31, 1:20 AM PDT · 14670 days ago · 6 km deep · 43 km away
58. 2.24 km N of East Foothills, CaliforniaThu, Jul 31, 4:21 AM PDT · 14670 days ago · 2 km deep · 51 km away
59. 1.718 km SSE of Livermore, CaliforniaThu, Jul 31, 7:12 AM PDT · 14670 days ago · 8 km deep · 42 km away
60. 1.82 km ESE of Chinatown, CaliforniaThu, Jul 31, 8:20 AM PDT · 14670 days ago · 4 km deep · 48 km away

The first 60 of 135.

Before

1. 2.29 km NNE of East Foothills, CaliforniaThu, Jul 3, 11:25 PM PDT · 14697 days ago · 8 km deep · 47 km away
2. 2.218 km SSE of Livermore, CaliforniaWed, Jul 2, 3:29 PM PDT · 14698 days ago · 7 km deep · 42 km away
3. 1.611 km ENE of Blackhawk, CaliforniaWed, Jul 2, 2:16 PM PDT · 14698 days ago · 9 km deep · 6 km away
4. 1.88 km ENE of San Martin, CaliforniaWed, Jul 2, 5:49 AM PDT · 14699 days ago · 7 km deep · 89 km away
5. 2.014 km NE of East Foothills, CaliforniaWed, Jul 2, 5:08 AM PDT · 14699 days ago · 7 km deep · 50 km away
6. 1.89 km NNE of East Foothills, CaliforniaWed, Jul 2, 2:51 AM PDT · 14699 days ago · 8 km deep · 47 km away
7. 1.714 km NE of East Foothills, CaliforniaTue, Jul 1, 10:59 PM PDT · 14699 days ago · 7 km deep · 50 km away
8. 3.118 km NE of East Foothills, CaliforniaTue, Jul 1, 2:31 PM PDT · 14699 days ago · 7 km deep · 44 km away
9. 2.318 km SSE of Livermore, CaliforniaTue, Jul 1, 1:45 PM PDT · 14699 days ago · 7 km deep · 42 km away
10. 1.819 km SSE of Livermore, CaliforniaTue, Jul 1, 7:25 AM PDT · 14700 days ago · 7 km deep · 43 km away
11. 2.514 km NE of East Foothills, CaliforniaTue, Jul 1, 1:40 AM PDT · 14700 days ago · 8 km deep · 49 km away
12. 1.519 km SSE of Livermore, CaliforniaTue, Jul 1, 1:32 AM PDT · 14700 days ago · 7 km deep · 43 km away
13. 1.812 km ESE of East Foothills, CaliforniaMon, Jun 30, 9:18 AM PDT · 14701 days ago · 6 km deep · 62 km away
14. 3.311 km SW of Brentwood, CaliforniaMon, Jun 30, 4:00 AM PDT · 14701 days ago · 16 km deep · 8 km away
15. 2.313 km N of Morgan Hill, CaliforniaSun, Jun 29, 9:21 PM PDT · 14701 days ago · 5 km deep · 72 km away
16. 1.86 km NNE of East Foothills, CaliforniaSun, Jun 29, 1:35 PM PDT · 14701 days ago · 6 km deep · 49 km away
17. 1.519 km SSE of Livermore, CaliforniaSun, Jun 29, 2:31 AM PDT · 14702 days ago · 7 km deep · 43 km away
18. 2.03 km S of San Ramon, CaliforniaSat, Jun 28, 9:53 AM PDT · 14703 days ago · 7 km deep · 19 km away
19. 2.44 km S of San Ramon, CaliforniaSat, Jun 28, 3:38 AM PDT · 14703 days ago · 7 km deep · 19 km away
20. 2.318 km NE of East Foothills, CaliforniaFri, Jun 27, 7:33 PM PDT · 14703 days ago · 9 km deep · 44 km away

From the USGS Earthquake Hazards Program and its partner networks, event nc75868. Read Tue, Sep 29, 2026, 7:40 AM UTC.