M3.5 earthquake 31 km WSW of Three Rocks, California

Magnitude

3.5 (Md, duration), minor

Magnitude from

Northern California Seismic System

Local time

Fri, Mar 21, 1975, 2:59 PM PDT

UTC

1975-03-21 21:59:28 UTC

Depth

14.1 km (8.8 mi), shallow

Epicenter

36.405° N, 120.721° W

Region

California

Tsunami flag

No

Status

Reviewed by a seismologist

Location uncertainty

About 0.4 km horizontally, 0.6 km in depth

Magnitude uncertainty

±0.26

Depth from

From location

Station coverage gap

115°

Stations used

18

• King City, CaliforniaPopulation 13,902. Forecast42 kmENE
• Salinas, CaliforniaPopulation 157,380. Forecast89 kmESE
• Los Angeles, CaliforniaPopulation 3,820,914. Forecast345 kmNW

After

1. 2.310 km NNW of Hollister, CaliforniaFri, Mar 21, 9:06 PM PDT · 18824 days ago · 3 km deep · 89 km away
2. 1.612 km WNW of Parkfield, CaliforniaFri, Mar 21, 9:17 PM PDT · 18824 days ago · 8 km deep · 52 km away
3. 2.323 km NE of King City, CaliforniaSat, Mar 22, 1:11 AM PDT · 18823 days ago · 3 km deep · 18 km away
4. 3.010 km NW of Hollister, CaliforniaSat, Mar 22, 9:15 AM PDT · 18823 days ago · 2 km deep · 89 km away
5. 3.024 km ENE of Greenfield, CaliforniaSat, Mar 22, 2:11 PM PDT · 18823 days ago · 6 km deep · 24 km away
6. 3.623 km NW of Parkfield, CaliforniaSun, Mar 23, 8:04 AM PDT · 18822 days ago · 9 km deep · 41 km away
7. 2.99 km NNW of Hollister, CaliforniaSun, Mar 23, 5:19 PM PDT · 18822 days ago · 4 km deep · 88 km away
8. 2.18 km SSW of Tres Pinos, CaliforniaMon, Mar 24, 3:18 AM PDT · 18821 days ago · 3 km deep · 66 km away
9. 2.023 km NE of King City, CaliforniaMon, Mar 24, 3:23 AM PDT · 18821 days ago · 4 km deep · 22 km away
10. 2.425 km E of Tres Pinos, CaliforniaMon, Mar 24, 6:31 AM PDT · 18821 days ago · 2 km deep · 51 km away
11. 2.124 km ENE of Soledad, CaliforniaMon, Mar 24, 4:33 PM PDT · 18821 days ago · 3 km deep · 33 km away
12. 2.324 km ENE of Soledad, CaliforniaMon, Mar 24, 5:14 PM PDT · 18821 days ago · 3 km deep · 33 km away
13. 2.39 km NNW of Hollister, CaliforniaMon, Mar 24, 10:04 PM PDT · 18821 days ago · 2 km deep · 88 km away
14. 2.521 km NE of Soledad, CaliforniaMon, Mar 24, 11:21 PM PDT · 18820 days ago · 3 km deep · 43 km away
15. 1.618 km W of Volta, CaliforniaTue, Mar 25, 11:25 AM PDT · 18820 days ago · 4 km deep · 82 km away
16. 2.623 km NE of San Lucas, CaliforniaTue, Mar 25, 12:46 PM PDT · 18820 days ago · 8 km deep · 18 km away
17. 2.011 km ESE of Tres Pinos, CaliforniaTue, Mar 25, 8:01 PM PDT · 18820 days ago · 10 km deep · 57 km away
18. 2.524 km NE of Greenfield, CaliforniaTue, Mar 25, 11:00 PM PDT · 18819 days ago · 7 km deep · 28 km away
19. 2.328 km NW of San Simeon, CaliforniaWed, Mar 26, 6:49 AM PDT · 18819 days ago · 5 km deep · 93 km away
20. 2.116 km NW of Parkfield, CaliforniaWed, Mar 26, 11:58 AM PDT · 18819 days ago · 3 km deep · 47 km away
21. 3.016 km SSE of Tres Pinos, CaliforniaWed, Mar 26, 1:13 PM PDT · 18819 days ago · 2 km deep · 55 km away
22. 2.117 km SSE of Tres Pinos, CaliforniaWed, Mar 26, 7:07 PM PDT · 18819 days ago · 2 km deep · 55 km away
23. 2.111 km SSE of Tres Pinos, CaliforniaThu, Mar 27, 2:11 AM PDT · 18818 days ago · 5 km deep · 59 km away
24. 2.910 km NW of Hollister, CaliforniaThu, Mar 27, 6:34 AM PDT · 18818 days ago · 2 km deep · 89 km away
25. 3.43 km SE of San Ardo, CaliforniaThu, Mar 27, 10:38 PM PDT · 18817 days ago · 13 km deep · 48 km away
26. 2.033 km ENE of Soledad, CaliforniaFri, Mar 28, 5:53 AM PDT · 18817 days ago · 10 km deep · 32 km away
27. 2.421 km NE of Soledad, CaliforniaFri, Mar 28, 9:10 AM PDT · 18817 days ago · 3 km deep · 40 km away
28. 3.124 km NE of King City, CaliforniaFri, Mar 28, 10:56 AM PDT · 18817 days ago · 7 km deep · 18 km away
29. 1.79 km NW of Hollister, CaliforniaFri, Mar 28, 11:19 AM PDT · 18817 days ago · 5 km deep · 88 km away
30. 2.619 km NW of Parkfield, CaliforniaFri, Mar 28, 12:56 PM PDT · 18817 days ago · 6 km deep · 45 km away
31. 2.71 km SW of San Juan Bautista, CaliforniaFri, Mar 28, 2:33 PM PDT · 18817 days ago · 6 km deep · 88 km away
32. 2.217 km NW of Parkfield, CaliforniaFri, Mar 28, 7:14 PM PDT · 18817 days ago · 5 km deep · 46 km away
33. 2.25 km SW of Ridgemark, CaliforniaFri, Mar 28, 10:28 PM PDT · 18816 days ago · 9 km deep · 74 km away
34. 2.08 km NW of Hollister, CaliforniaSat, Mar 29, 6:38 AM PDT · 18816 days ago · 5 km deep · 87 km away
35. 2.523 km NE of King City, CaliforniaSat, Mar 29, 8:43 AM PDT · 18816 days ago · 7 km deep · 21 km away
36. 1.95 km WSW of Hollister, CaliforniaSat, Mar 29, 10:58 AM PDT · 18816 days ago · 10 km deep · 81 km away
37. 3.45 km WSW of Hollister, CaliforniaSat, Mar 29, 11:00 AM PDT · 18816 days ago · 9 km deep · 82 km away
38. 2.25 km WSW of Hollister, CaliforniaSat, Mar 29, 11:03 AM PDT · 18816 days ago · 9 km deep · 82 km away
39. 3.523 km NE of San Lucas, CaliforniaSat, Mar 29, 8:57 PM PDT · 18816 days ago · 6 km deep · 19 km away
40. 3.122 km NE of San Lucas, CaliforniaSat, Mar 29, 8:57 PM PDT · 18816 days ago · 6 km deep · 19 km away
41. 3.023 km ENE of San Lucas, CaliforniaSat, Mar 29, 9:27 PM PDT · 18816 days ago · 7 km deep · 19 km away
42. 3.123 km NE of San Lucas, CaliforniaSat, Mar 29, 11:42 PM PDT · 18815 days ago · 7 km deep · 19 km away
43. 3.011 km ESE of Gilroy, CaliforniaSun, Mar 30, 12:15 AM PDT · 18815 days ago · 3 km deep · 90 km away
44. 2.414 km SSE of Tres Pinos, CaliforniaSun, Mar 30, 12:39 AM PDT · 18815 days ago · 3 km deep · 58 km away
45. 2.29 km NE of San Juan Bautista, CaliforniaSun, Mar 30, 2:36 AM PDT · 18815 days ago · 5 km deep · 88 km away
46. 2.221 km SSE of Tres Pinos, CaliforniaSun, Mar 30, 9:25 AM PDT · 18815 days ago · 5 km deep · 51 km away
47. 3.05 km NNE of Hollister, CaliforniaSun, Mar 30, 10:44 AM PDT · 18815 days ago · 7 km deep · 80 km away
48. 2.92 km SSE of Tres Pinos, CaliforniaSun, Mar 30, 1:25 PM PDT · 18815 days ago · 5 km deep · 67 km away
49. 2.621 km NE of Soledad, CaliforniaSun, Mar 30, 7:27 PM PDT · 18815 days ago · 4 km deep · 43 km away
50. 2.723 km ENE of Soledad, CaliforniaSun, Mar 30, 10:01 PM PDT · 18815 days ago · 5 km deep · 35 km away
51. 2.85 km S of Gilroy, CaliforniaMon, Mar 31, 5:13 AM PDT · 18814 days ago · 6 km deep · 98 km away
52. 2.48 km NE of San Juan Bautista, CaliforniaMon, Mar 31, 2:22 PM PDT · 18814 days ago · 5 km deep · 88 km away
53. 2.19 km NW of Hollister, CaliforniaMon, Mar 31, 7:17 PM PDT · 18814 days ago · 5 km deep · 88 km away
54. 3.29 km NW of Hollister, CaliforniaTue, Apr 1, 3:49 PM PDT · 18813 days ago · 3 km deep · 88 km away
55. 2.226 km NE of Soledad, CaliforniaWed, Apr 2, 12:04 AM PDT · 18812 days ago · 7 km deep · 42 km away
56. 2.311 km ESE of Gilroy, CaliforniaWed, Apr 2, 1:04 PM PDT · 18812 days ago · 3 km deep · 90 km away
57. 2.619 km ESE of Tres Pinos, CaliforniaWed, Apr 2, 9:47 PM PDT · 18812 days ago · 1 km deep · 52 km away
58. 3.026 km NE of Soledad, CaliforniaWed, Apr 2, 11:13 PM PDT · 18811 days ago · 10 km deep · 37 km away
59. 1.75 km SSW of Gilroy, CaliforniaThu, Apr 3, 2:29 AM PDT · 18811 days ago · 3 km deep · 99 km away
60. 3.630 km NE of San Ardo, CaliforniaThu, Apr 3, 7:44 AM PDT · 18811 days ago · 8 km deep · 18 km away

The first 60 of 192.

Before

1. 2.417 km SE of Tres Pinos, CaliforniaFri, Mar 21, 2:18 PM PDT · 18824 days ago · 7 km deep · 51 km away
2. 3.69 km NW of Hollister, CaliforniaFri, Mar 21, 4:19 AM PDT · 18824 days ago · 4 km deep · 88 km away
3. 2.59 km NE of San Juan Bautista, CaliforniaFri, Mar 21, 4:11 AM PDT · 18824 days ago · 3 km deep · 88 km away
4. 3.39 km NW of Hollister, CaliforniaFri, Mar 21, 3:10 AM PDT · 18824 days ago · 4 km deep · 88 km away
5. 2.09 km NW of Hollister, CaliforniaFri, Mar 21, 3:08 AM PDT · 18824 days ago · 3 km deep · 87 km away
6. 3.59 km NW of Hollister, CaliforniaFri, Mar 21, 3:06 AM PDT · 18824 days ago · 5 km deep · 88 km away
7. 3.024 km ENE of Soledad, CaliforniaFri, Mar 21, 1:35 AM PDT · 18824 days ago · 8 km deep · 37 km away
8. 1.815 km SSE of Tres Pinos, CaliforniaThu, Mar 20, 9:59 AM PDT · 18825 days ago · 3 km deep · 57 km away
9. 2.421 km NE of Soledad, CaliforniaThu, Mar 20, 4:50 AM PDT · 18825 days ago · 4 km deep · 43 km away
10. 2.425 km NNE of King City, CaliforniaWed, Mar 19, 11:21 PM PDT · 18825 days ago · 8 km deep · 23 km away
11. 1.813 km SSE of Tres Pinos, CaliforniaWed, Mar 19, 8:20 PM PDT · 18826 days ago · 11 km deep · 58 km away
12. 2.410 km NNW of Hollister, CaliforniaWed, Mar 19, 6:58 PM PDT · 18826 days ago · 4 km deep · 88 km away
13. 2.62 km SW of Ridgemark, CaliforniaWed, Mar 19, 11:07 AM PDT · 18826 days ago · 7 km deep · 74 km away
14. 1.624 km NE of Greenfield, CaliforniaTue, Mar 18, 12:00 PM PDT · 18827 days ago · 4 km deep · 30 km away
15. 2.39 km NNW of Hollister, CaliforniaTue, Mar 18, 6:39 AM PDT · 18827 days ago · 4 km deep · 88 km away
16. 1.911 km ESE of Parkfield, CaliforniaTue, Mar 18, 3:31 AM PDT · 18827 days ago · 14 km deep · 72 km away
17. 2.114 km SE of Tres Pinos, CaliforniaTue, Mar 18, 12:49 AM PDT · 18827 days ago · 9 km deep · 54 km away
18. 1.624 km ENE of Soledad, CaliforniaMon, Mar 17, 11:48 PM PDT · 18827 days ago · 5 km deep · 32 km away
19. 3.226 km W of Three Rocks, CaliforniaMon, Mar 17, 8:07 PM PDT · 18828 days ago · 7 km deep · 14 km away
20. 3.422 km NNE of Soledad, CaliforniaMon, Mar 17, 6:06 AM PDT · 18828 days ago · 2 km deep · 48 km away

From the USGS Earthquake Hazards Program and its partner networks, event nc1023285. Read Sat, Oct 3, 2026, 4:47 PM UTC.