M1.5 earthquake 3 km S of Blackhawk, California

Magnitude

1.5 (Md, duration), micro

Magnitude from

Northern California Seismic System

Local time

Fri, Jun 13, 1986, 7:23 AM PDT

UTC

1986-06-13 14:23:03 UTC

Depth

6.7 km (4.2 mi), shallow

Epicenter

37.786° N, 121.913° 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

±0.09

Depth from

From location

Station coverage gap

77°

Stations used

16

• Blackhawk, CaliforniaPopulation 9,354. Forecast4 kmS
• San Ramon, CaliforniaPopulation 76,134. Forecast6 kmE
• Hayward, CaliforniaPopulation 158,289. Forecast20 kmNE
• Los Angeles, CaliforniaPopulation 3,820,914. Forecast531 kmNW

After

1. 1.57 km S of Livermore, CaliforniaFri, Jun 13, 9:06 PM PDT · 14721 days ago · 8 km deep · 23 km away
2. 1.718 km NE of East Foothills, CaliforniaSat, Jun 14, 12:13 PM PDT · 14720 days ago · 7 km deep · 36 km away
3. 2.07 km E of Gilroy, CaliforniaSat, Jun 14, 12:38 PM PDT · 14720 days ago · 4 km deep · 94 km away
4. 1.913 km NNE of East Foothills, CaliforniaSat, Jun 14, 1:12 PM PDT · 14720 days ago · 9 km deep · 36 km away
5. 2.716 km N of Morgan Hill, CaliforniaSat, Jun 14, 1:31 PM PDT · 14720 days ago · 6 km deep · 61 km away
6. 1.913 km ENE of East Foothills, CaliforniaSun, Jun 15, 3:37 AM PDT · 14719 days ago · 6 km deep · 44 km away
7. 1.66 km E of East Foothills, CaliforniaSun, Jun 15, 5:29 AM PDT · 14719 days ago · 6 km deep · 47 km away
8. 3.118 km SE of Livermore, CaliforniaSun, Jun 15, 7:00 AM PDT · 14719 days ago · 5 km deep · 36 km away
9. 1.69 km NNE of San Martin, CaliforniaSun, Jun 15, 11:30 AM PDT · 14719 days ago · 5 km deep · 77 km away
10. 2.04 km N of East Foothills, CaliforniaMon, Jun 16, 6:27 AM PDT · 14718 days ago · 1 km deep · 42 km away
11. 1.915 km NE of East Foothills, CaliforniaMon, Jun 16, 2:00 PM PDT · 14718 days ago · 5 km deep · 41 km away
12. 1.618 km NE of East Foothills, CaliforniaMon, Jun 16, 2:50 PM PDT · 14718 days ago · 8 km deep · 37 km away
13. 1.518 km SSE of Livermore, CaliforniaMon, Jun 16, 7:18 PM PDT · 14718 days ago · 5 km deep · 35 km away
14. 1.59 km NNE of Morgan Hill, CaliforniaMon, Jun 16, 10:30 PM PDT · 14718 days ago · 3 km deep · 70 km away
15. 1.613 km ENE of East Foothills, CaliforniaTue, Jun 17, 12:17 AM PDT · 14718 days ago · 7 km deep · 43 km away
16. 1.513 km ENE of East Foothills, CaliforniaTue, Jun 17, 11:18 PM PDT · 14717 days ago · 7 km deep · 44 km away
17. 2.04 km WNW of Glen Ellen, CaliforniaWed, Jun 18, 4:55 AM PDT · 14716 days ago · 9 km deep · 87 km away
18. 2.818 km NE of East Foothills, CaliforniaWed, Jun 18, 11:59 PM PDT · 14716 days ago · 9 km deep · 37 km away
19. 1.613 km ENE of East Foothills, CaliforniaThu, Jun 19, 9:06 AM PDT · 14715 days ago · 8 km deep · 42 km away
20. 1.80 km SSW of Crockett, CaliforniaThu, Jun 19, 11:09 PM PDT · 14715 days ago · 10 km deep · 39 km away
21. 2.019 km SSE of Livermore, CaliforniaFri, Jun 20, 9:53 AM PDT · 14714 days ago · 6 km deep · 36 km away
22. 1.613 km ENE of East Foothills, CaliforniaSun, Jun 22, 10:55 AM PDT · 14712 days ago · 8 km deep · 43 km away
23. 2.220 km ENE of East Foothills, CaliforniaSun, Jun 22, 11:32 PM PDT · 14712 days ago · 8 km deep · 43 km away
24. 2.513 km ENE of East Foothills, CaliforniaMon, Jun 23, 1:05 AM PDT · 14711 days ago · 7 km deep · 44 km away
25. 1.517 km NE of East Foothills, CaliforniaMon, Jun 23, 3:08 AM PDT · 14711 days ago · 2 km deep · 39 km away
26. 1.95 km ENE of Black Point-Green Point, CaliforniaMon, Jun 23, 8:17 AM PDT · 14711 days ago · 12 km deep · 61 km away
27. 2.019 km SSE of Livermore, CaliforniaMon, Jun 23, 9:58 PM PDT · 14711 days ago · 6 km deep · 36 km away
28. 2.29 km NE of Gilroy, CaliforniaMon, Jun 23, 10:13 PM PDT · 14711 days ago · 9 km deep · 88 km away
29. 1.79 km NNE of East Foothills, CaliforniaTue, Jun 24, 11:57 PM PDT · 14710 days ago · 8 km deep · 38 km away
30. 2.410 km NNE of East Foothills, CaliforniaWed, Jun 25, 3:50 AM PDT · 14709 days ago · 8 km deep · 38 km away
31. 2.118 km SSE of Livermore, CaliforniaWed, Jun 25, 8:11 AM PDT · 14709 days ago · 7 km deep · 35 km away
32. 1.518 km SSE of Livermore, CaliforniaWed, Jun 25, 9:42 AM PDT · 14709 days ago · 7 km deep · 35 km away
33. 1.516 km NE of East Foothills, CaliforniaThu, Jun 26, 5:24 AM PDT · 14708 days ago · 10 km deep · 41 km away
34. 1.812 km ENE of East Foothills, CaliforniaThu, Jun 26, 11:57 AM PDT · 14708 days ago · 7 km deep · 46 km away
35. 2.64 km S of San Ramon, CaliforniaThu, Jun 26, 9:06 PM PDT · 14708 days ago · 8 km deep · 8 km away
36. 1.94 km S of San Ramon, CaliforniaFri, Jun 27, 12:46 AM PDT · 14708 days ago · 8 km deep · 8 km away
37. 2.318 km NE of East Foothills, CaliforniaFri, Jun 27, 7:33 PM PDT · 14707 days ago · 9 km deep · 37 km away
38. 2.44 km S of San Ramon, CaliforniaSat, Jun 28, 3:38 AM PDT · 14706 days ago · 7 km deep · 8 km away
39. 2.03 km S of San Ramon, CaliforniaSat, Jun 28, 9:53 AM PDT · 14706 days ago · 7 km deep · 8 km away
40. 1.519 km SSE of Livermore, CaliforniaSun, Jun 29, 2:31 AM PDT · 14705 days ago · 7 km deep · 36 km away
41. 1.86 km NNE of East Foothills, CaliforniaSun, Jun 29, 1:35 PM PDT · 14705 days ago · 6 km deep · 40 km away
42. 2.313 km N of Morgan Hill, CaliforniaSun, Jun 29, 9:21 PM PDT · 14705 days ago · 5 km deep · 64 km away
43. 3.311 km SW of Brentwood, CaliforniaMon, Jun 30, 4:00 AM PDT · 14704 days ago · 16 km deep · 14 km away
44. 1.812 km ESE of East Foothills, CaliforniaMon, Jun 30, 9:18 AM PDT · 14704 days ago · 6 km deep · 54 km away
45. 1.519 km SSE of Livermore, CaliforniaTue, Jul 1, 1:32 AM PDT · 14703 days ago · 7 km deep · 36 km away
46. 2.514 km NE of East Foothills, CaliforniaTue, Jul 1, 1:40 AM PDT · 14703 days ago · 8 km deep · 42 km away
47. 1.819 km SSE of Livermore, CaliforniaTue, Jul 1, 7:25 AM PDT · 14703 days ago · 7 km deep · 36 km away
48. 2.08 km ENE of Gilroy, CaliforniaTue, Jul 1, 10:45 AM PDT · 14703 days ago · 8 km deep · 93 km away
49. 2.318 km SSE of Livermore, CaliforniaTue, Jul 1, 1:45 PM PDT · 14703 days ago · 7 km deep · 35 km away
50. 3.118 km NE of East Foothills, CaliforniaTue, Jul 1, 2:31 PM PDT · 14703 days ago · 7 km deep · 37 km away
51. 1.714 km NE of East Foothills, CaliforniaTue, Jul 1, 10:59 PM PDT · 14703 days ago · 7 km deep · 42 km away
52. 1.89 km NNE of East Foothills, CaliforniaWed, Jul 2, 2:51 AM PDT · 14702 days ago · 8 km deep · 39 km away
53. 2.014 km NE of East Foothills, CaliforniaWed, Jul 2, 5:08 AM PDT · 14702 days ago · 7 km deep · 42 km away
54. 1.88 km ENE of San Martin, CaliforniaWed, Jul 2, 5:49 AM PDT · 14702 days ago · 7 km deep · 82 km away
55. 1.611 km ENE of Blackhawk, CaliforniaWed, Jul 2, 2:16 PM PDT · 14702 days ago · 9 km deep · 13 km away
56. 2.218 km SSE of Livermore, CaliforniaWed, Jul 2, 3:29 PM PDT · 14702 days ago · 7 km deep · 35 km away
57. 2.29 km NNE of East Foothills, CaliforniaThu, Jul 3, 11:25 PM PDT · 14701 days ago · 8 km deep · 39 km away
58. 2.58 km NE of Blackhawk, CaliforniaFri, Jul 4, 7:27 AM PDT · 14700 days ago · 9 km deep · 12 km away
59. 1.97 km E of East Foothills, CaliforniaSat, Jul 5, 2:00 AM PDT · 14699 days ago · 8 km deep · 48 km away
60. 1.65 km NE of Tracy, CaliforniaSat, Jul 5, 5:01 AM PDT · 14699 days ago · 13 km deep · 46 km away

The first 60 of 148.

Before

1. 1.613 km ENE of East Foothills, CaliforniaThu, Jun 12, 6:31 AM PDT · 14722 days ago · 8 km deep · 45 km away
2. 1.718 km NE of East Foothills, CaliforniaThu, Jun 12, 6:16 AM PDT · 14722 days ago · 6 km deep · 36 km away
3. 2.016 km SE of Livermore, CaliforniaWed, Jun 11, 11:54 PM PDT · 14723 days ago · 1 km deep · 34 km away
4. 3.113 km N of Morgan Hill, CaliforniaWed, Jun 11, 8:08 AM PDT · 14723 days ago · 4 km deep · 64 km away
5. 3.06 km SW of Gilroy, CaliforniaWed, Jun 11, 6:03 AM PDT · 14723 days ago · 6 km deep · 96 km away
6. 2.111 km S of Pescadero, CaliforniaTue, Jun 10, 11:40 PM PDT · 14724 days ago · 16 km deep · 82 km away
7. 1.613 km ENE of East Foothills, CaliforniaTue, Jun 10, 4:12 AM PDT · 14724 days ago · 6 km deep · 44 km away
8. 1.613 km SSW of Pescadero, CaliforniaMon, Jun 9, 11:41 PM PDT · 14725 days ago · 9 km deep · 85 km away
9. 1.718 km NE of East Foothills, CaliforniaMon, Jun 9, 6:19 AM PDT · 14725 days ago · 7 km deep · 36 km away
10. 2.52 km W of Brentwood, CaliforniaSun, Jun 8, 9:48 PM PDT · 14726 days ago · 0 km deep · 24 km away
11. 1.614 km E of Seven Trees, CaliforniaSun, Jun 8, 9:15 PM PDT · 14726 days ago · 6 km deep · 58 km away
12. 1.89 km W of Noe Valley, CaliforniaSun, Jun 8, 12:25 PM PDT · 14726 days ago · 8 km deep · 55 km away
13. 1.75 km ENE of Interlaken, CaliforniaSun, Jun 8, 1:51 AM PDT · 14726 days ago · 11 km deep · 92 km away
14. 1.64 km S of San Ramon, CaliforniaSat, Jun 7, 2:05 PM PDT · 14727 days ago · 7 km deep · 8 km away
15. 1.95 km ENE of Interlaken, CaliforniaSat, Jun 7, 11:29 AM PDT · 14727 days ago · 11 km deep · 92 km away
16. 1.817 km NE of East Foothills, CaliforniaSat, Jun 7, 7:02 AM PDT · 14727 days ago · 8 km deep · 37 km away
17. 1.95 km ENE of Interlaken, CaliforniaSat, Jun 7, 3:26 AM PDT · 14727 days ago · 11 km deep · 92 km away
18. 2.04 km SSW of Gilroy, CaliforniaFri, Jun 6, 8:37 PM PDT · 14728 days ago · 7 km deep · 95 km away
19. 1.612 km ENE of East Foothills, CaliforniaFri, Jun 6, 6:22 PM PDT · 14728 days ago · 6 km deep · 45 km away
20. 2.114 km N of Morgan Hill, CaliforniaFri, Jun 6, 3:07 PM PDT · 14728 days ago · 6 km deep · 63 km away

From the USGS Earthquake Hazards Program and its partner networks, event nc74902. Read Fri, Oct 2, 2026, 7:27 PM UTC.