M1.7 earthquake 4 km N of Milpitas, California

Magnitude

1.7 (md), micro

Local time

Wed, Sep 2, 1981, 4:48 AM PDT

UTC

1981-09-02 11:48:32 UTC

Depth

3.0 km (1.8 mi), shallow

Epicenter

37.473° N, 121.906° W

Region

California

Tsunami flag

No

Status

Reviewed by a seismologist

Location uncertainty

About 0.4 km horizontally, 0.5 km in depth

Magnitude uncertainty

±0.24

Depth from

From location

Station coverage gap

150°

Stations used

18

• Milpitas, CaliforniaPopulation 77,604. Forecast5 kmN
• Fremont, CaliforniaPopulation 232,206. Forecast11 kmSE
• Los Angeles, CaliforniaPopulation 3,820,914. Forecast504 kmNW

After

1. 1.65 km E of Fremont, CaliforniaWed, Sep 2, 6:39 AM PDT · 16456 days ago · 10 km deep · 9 km away
2. 1.99 km SSW of Tres Pinos, CaliforniaWed, Sep 2, 10:53 PM PDT · 16456 days ago · 2 km deep · 99 km away
3. 1.518 km ESE of East Foothills, CaliforniaThu, Sep 3, 3:15 AM PDT · 16455 days ago · 1 km deep · 31 km away
4. 1.611 km ENE of Milpitas, CaliforniaThu, Sep 3, 8:57 AM PDT · 16455 days ago · 4 km deep · 9 km away
5. 1.65 km SSW of Tres Pinos, CaliforniaSat, Sep 5, 9:06 AM PDT · 16453 days ago · 9 km deep · 95 km away
6. 1.89 km E of San Martin, CaliforniaSun, Sep 6, 10:40 AM PDT · 16452 days ago · 9 km deep · 57 km away
7. 1.611 km SSW of Loyola, CaliforniaSun, Sep 6, 11:23 AM PDT · 16452 days ago · 10 km deep · 32 km away
8. 1.55 km ESE of Aromas, CaliforniaMon, Sep 7, 9:28 AM PDT · 16451 days ago · 7 km deep · 73 km away
9. 2.19 km ENE of Morgan Hill, CaliforniaTue, Sep 8, 8:10 AM PDT · 16450 days ago · 6 km deep · 47 km away
10. 1.62 km SSW of San Juan Bautista, CaliforniaTue, Sep 8, 3:11 PM PDT · 16450 days ago · 6 km deep · 79 km away
11. 3.26 km S of San Juan Bautista, CaliforniaTue, Sep 8, 11:54 PM PDT · 16450 days ago · 11 km deep · 83 km away
12. 2.96 km S of San Juan Bautista, CaliforniaWed, Sep 9, 6:38 AM PDT · 16449 days ago · 10 km deep · 83 km away
13. 1.61 km WSW of Belmont, CaliforniaFri, Sep 11, 10:06 AM PDT · 16447 days ago · 3 km deep · 34 km away
14. 3.09 km NE of San Martin, CaliforniaSat, Sep 12, 8:49 AM PDT · 16446 days ago · 8 km deep · 48 km away
15. 1.77 km ESE of Prunedale, CaliforniaSun, Sep 13, 4:18 AM PDT · 16445 days ago · 8 km deep · 84 km away
16. 2.67 km W of Gilroy, CaliforniaSun, Sep 13, 6:16 AM PDT · 16445 days ago · 4 km deep · 58 km away
17. 1.65 km SW of Ridgemark, CaliforniaMon, Sep 14, 10:43 AM PDT · 16444 days ago · 9 km deep · 89 km away
18. 2.011 km SSW of Loyola, CaliforniaMon, Sep 14, 1:49 PM PDT · 16444 days ago · 9 km deep · 33 km away
19. 1.615 km N of Morgan Hill, CaliforniaWed, Sep 16, 2:30 AM PDT · 16443 days ago · 6 km deep · 33 km away
20. 1.615 km N of Morgan Hill, CaliforniaWed, Sep 16, 2:46 AM PDT · 16443 days ago · 6 km deep · 33 km away
21. 1.75 km WNW of Broadmoor, CaliforniaThu, Sep 17, 1:29 AM PDT · 16442 days ago · 4 km deep · 61 km away
22. 2.54 km SW of Tres Pinos, CaliforniaThu, Sep 17, 6:16 AM PDT · 16441 days ago · 9 km deep · 93 km away
23. 1.69 km SSW of Tres Pinos, CaliforniaThu, Sep 17, 8:48 AM PDT · 16441 days ago · 2 km deep · 99 km away
24. 1.714 km E of Seven Trees, CaliforniaFri, Sep 18, 3:26 AM PDT · 16440 days ago · 4 km deep · 29 km away
25. 1.521 km ENE of East Foothills, CaliforniaSun, Sep 20, 5:23 PM PDT · 16438 days ago · 6 km deep · 27 km away
26. 2.19 km ESE of East Foothills, CaliforniaSun, Sep 20, 9:46 PM PDT · 16438 days ago · 5 km deep · 21 km away
27. 2.03 km SW of Davenport, CaliforniaMon, Sep 21, 9:22 PM PDT · 16437 days ago · 11 km deep · 61 km away
28. 2.44 km SW of Tres Pinos, CaliforniaTue, Sep 22, 5:09 PM PDT · 16436 days ago · 9 km deep · 93 km away
29. 1.82 km NNE of Woodside, CaliforniaTue, Sep 22, 5:53 PM PDT · 16436 days ago · 5 km deep · 30 km away
30. 1.82 km E of Tres Pinos, CaliforniaWed, Sep 23, 1:38 AM PDT · 16436 days ago · 8 km deep · 93 km away
31. 1.720 km W of Volta, CaliforniaWed, Sep 23, 9:20 AM PDT · 16435 days ago · 0 km deep · 79 km away
32. 1.88 km ENE of Blackhawk, CaliforniaWed, Sep 23, 9:25 PM PDT · 16435 days ago · 14 km deep · 42 km away
33. 3.23 km S of San Juan Bautista, CaliforniaThu, Sep 24, 7:00 AM PDT · 16434 days ago · 8 km deep · 80 km away
34. 3.13 km S of San Juan Bautista, CaliforniaThu, Sep 24, 2:44 PM PDT · 16434 days ago · 7 km deep · 81 km away
35. 1.64 km S of San Juan Bautista, CaliforniaThu, Sep 24, 3:20 PM PDT · 16434 days ago · 7 km deep · 81 km away
36. 1.84 km SW of Tres Pinos, CaliforniaFri, Sep 25, 5:22 PM PDT · 16433 days ago · 8 km deep · 93 km away
37. 1.85 km E of Fremont, CaliforniaSat, Sep 26, 10:37 AM PDT · 16432 days ago · 9 km deep · 8 km away
38. 1.75 km SSW of Gilroy, CaliforniaSat, Sep 26, 4:06 PM PDT · 16432 days ago · 4 km deep · 63 km away
39. 2.39 km ESE of East Foothills, CaliforniaSat, Sep 26, 10:41 PM PDT · 16432 days ago · 8 km deep · 22 km away
40. 2.49 km NE of Gilroy, CaliforniaSun, Sep 27, 12:57 AM PDT · 16432 days ago · 9 km deep · 58 km away
41. 1.67 km SSE of Gilroy, CaliforniaSun, Sep 27, 11:59 PM PDT · 16431 days ago · 5 km deep · 67 km away
42. 4.03 km S of San Juan Bautista, CaliforniaMon, Sep 28, 12:34 AM PDT · 16431 days ago · 9 km deep · 80 km away
43. 2.44 km S of San Juan Bautista, CaliforniaMon, Sep 28, 10:54 AM PDT · 16430 days ago · 9 km deep · 81 km away
44. 1.54 km S of San Juan Bautista, CaliforniaMon, Sep 28, 11:46 AM PDT · 16430 days ago · 8 km deep · 81 km away
45. 2.34 km S of San Juan Bautista, CaliforniaMon, Sep 28, 11:51 AM PDT · 16430 days ago · 7 km deep · 81 km away
46. 2.54 km SSE of San Juan Bautista, CaliforniaMon, Sep 28, 3:02 PM PDT · 16430 days ago · 7 km deep · 81 km away
47. 2.44 km SSE of San Juan Bautista, CaliforniaMon, Sep 28, 3:10 PM PDT · 16430 days ago · 7 km deep · 81 km away
48. 2.13 km SSW of San Juan Bautista, CaliforniaTue, Sep 29, 4:18 AM PDT · 16429 days ago · 7 km deep · 80 km away
49. 2.74 km S of San Juan Bautista, CaliforniaTue, Sep 29, 2:32 PM PDT · 16429 days ago · 7 km deep · 81 km away
50. 2.93 km ESE of Brentwood, CaliforniaThu, Oct 1, 10:05 PM PDT · 16427 days ago · 9 km deep · 55 km away
51. 1.54 km SSE of Diablo Grande, CaliforniaSat, Oct 3, 4:17 AM PDT · 16425 days ago · 8 km deep · 58 km away
52. 1.89 km NE of Milpitas, CaliforniaSat, Oct 3, 8:29 PM PDT · 16425 days ago · 7 km deep · 6 km away
53. 2.322 km SE of Livermore, CaliforniaMon, Oct 5, 2:55 AM PDT · 16424 days ago · 7 km deep · 31 km away
54. 2.33 km S of San Juan Bautista, CaliforniaMon, Oct 5, 9:53 AM PDT · 16423 days ago · 7 km deep · 80 km away
55. 2.010 km SW of Ridgemark, CaliforniaMon, Oct 5, 2:36 PM PDT · 16423 days ago · 10 km deep · 89 km away
56. 2.31 km NNE of Pacifica, CaliforniaMon, Oct 5, 9:02 PM PDT · 16423 days ago · 7 km deep · 54 km away
57. 1.86 km SE of Lexington Hills, CaliforniaTue, Oct 6, 12:22 AM PDT · 16423 days ago · 13 km deep · 38 km away
58. 1.81 km NNE of Pacifica, CaliforniaTue, Oct 6, 4:41 AM PDT · 16422 days ago · 7 km deep · 54 km away
59. 2.110 km SSW of Tracy, CaliforniaTue, Oct 6, 5:34 AM PDT · 16422 days ago · 9 km deep · 44 km away
60. 1.94 km SSE of San Juan Bautista, CaliforniaWed, Oct 7, 4:39 PM PDT · 16421 days ago · 7 km deep · 81 km away

The first 60 of 107.

Before

1. 2.06 km S of Sunol, CaliforniaTue, Sep 1, 10:57 PM PDT · 16457 days ago · 9 km deep · 7 km away
2. 1.65 km E of Fremont, CaliforniaTue, Sep 1, 2:15 AM PDT · 16458 days ago · 9 km deep · 8 km away
3. 2.412 km N of Livermore, CaliforniaSun, Aug 30, 2:04 AM PDT · 16460 days ago · 12 km deep · 38 km away
4. 2.12 km E of San Leandro, CaliforniaSat, Aug 29, 8:29 PM PDT · 16460 days ago · 5 km deep · 34 km away
5. 1.89 km ENE of Gilroy, CaliforniaSat, Aug 29, 4:37 PM PDT · 16460 days ago · 9 km deep · 61 km away
6. 2.37 km E of East Foothills, CaliforniaFri, Aug 28, 9:56 AM PDT · 16461 days ago · 6 km deep · 19 km away
7. 2.111 km E of Blackhawk, CaliforniaThu, Aug 27, 4:10 AM PDT · 16462 days ago · 14 km deep · 42 km away
8. 1.814 km E of Seven Trees, CaliforniaThu, Aug 27, 3:25 AM PDT · 16462 days ago · 2 km deep · 29 km away
9. 3.011 km SW of Brentwood, CaliforniaThu, Aug 27, 3:01 AM PDT · 16462 days ago · 16 km deep · 43 km away
10. 2.122 km SE of Livermore, CaliforniaWed, Aug 26, 6:45 AM PDT · 16463 days ago · 6 km deep · 31 km away
11. 1.815 km E of Seven Trees, CaliforniaWed, Aug 26, 3:39 AM PDT · 16463 days ago · 3 km deep · 30 km away
12. 1.611 km E of Blackhawk, CaliforniaWed, Aug 26, 3:08 AM PDT · 16463 days ago · 13 km deep · 42 km away
13. 1.615 km E of Seven Trees, CaliforniaTue, Aug 25, 7:15 AM PDT · 16464 days ago · 3 km deep · 30 km away
14. 1.98 km ENE of San Martin, CaliforniaTue, Aug 25, 1:55 AM PDT · 16465 days ago · 5 km deep · 52 km away
15. 2.33 km S of San Juan Bautista, CaliforniaMon, Aug 24, 2:34 AM PDT · 16466 days ago · 6 km deep · 81 km away
16. 2.18 km SW of Tres Pinos, CaliforniaSun, Aug 23, 2:47 PM PDT · 16466 days ago · 3 km deep · 94 km away
17. 1.76 km ENE of East Foothills, CaliforniaFri, Aug 21, 10:04 PM PDT · 16468 days ago · 4 km deep · 16 km away
18. 1.73 km NNW of Hollister, CaliforniaFri, Aug 21, 5:33 AM PDT · 16468 days ago · 7 km deep · 79 km away
19. 3.22 km SW of San Juan Bautista, CaliforniaFri, Aug 21, 5:00 AM PDT · 16468 days ago · 5 km deep · 78 km away
20. 1.68 km SE of San Juan Bautista, CaliforniaThu, Aug 20, 11:10 AM PDT · 16469 days ago · 5 km deep · 85 km away

From the USGS Earthquake Hazards Program and its partner networks, event nc1067307. Read Tue, Sep 22, 2026, 9:30 PM UTC.