M1.7 earthquake 2 km SW of Ridgemark, California

Magnitude

1.7 (md), micro

Local time

Tue, Aug 1, 1978, 1:01 AM PDT

UTC

1978-08-01 08:01:27 UTC

Depth

7.2 km (4.5 mi), shallow

Epicenter

36.794° N, 121.384° 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

±0.14

Depth from

From location

Station coverage gap

211°, poorly surrounded by stations

Stations used

12

• Ridgemark, CaliforniaPopulation 3,016. Forecast3 kmSW
• Hollister, CaliforniaPopulation 37,462. Forecast7 kmSSE
• Salinas, CaliforniaPopulation 157,380. Forecast27 kmENE
• Los Angeles, CaliforniaPopulation 3,820,914. Forecast417 kmNW

After

1. 1.818 km SSE of Tres Pinos, CaliforniaWed, Aug 2, 12:32 PM PDT · 17589 days ago · 7 km deep · 21 km away
2. 1.926 km ESE of Tres Pinos, CaliforniaWed, Aug 2, 5:23 PM PDT · 17589 days ago · 0 km deep · 32 km away
3. 1.632 km E of Tres Pinos, CaliforniaThu, Aug 3, 9:41 PM PDT · 17587 days ago · 1 km deep · 38 km away
4. 1.65 km SSW of Gilroy, CaliforniaSat, Aug 5, 5:04 PM PDT · 17586 days ago · 6 km deep · 25 km away
5. 1.512 km SE of Livermore, CaliforniaSat, Aug 5, 7:14 PM PDT · 17585 days ago · 4 km deep · 94 km away
6. 2.330 km NE of Soledad, CaliforniaSun, Aug 6, 5:11 PM PDT · 17585 days ago · 6 km deep · 37 km away
7. 2.023 km SSW of Volta, CaliforniaMon, Aug 7, 5:34 AM PDT · 17584 days ago · 5 km deep · 32 km away
8. 1.824 km SE of Tres Pinos, CaliforniaMon, Aug 7, 12:21 PM PDT · 17584 days ago · 9 km deep · 29 km away
9. 2.121 km NE of Soledad, CaliforniaTue, Aug 8, 4:21 AM PDT · 17583 days ago · 3 km deep · 32 km away
10. 2.05 km SSE of Sunol, CaliforniaTue, Aug 8, 4:19 PM PDT · 17583 days ago · 8 km deep · 94 km away
11. 1.624 km SE of Tres Pinos, CaliforniaTue, Aug 8, 7:41 PM PDT · 17582 days ago · 8 km deep · 29 km away
12. 2.114 km SSE of Tres Pinos, CaliforniaWed, Aug 9, 2:31 PM PDT · 17582 days ago · 4 km deep · 17 km away
13. 2.510 km SW of Ridgemark, CaliforniaThu, Aug 10, 10:47 AM PDT · 17581 days ago · 6 km deep · 8 km away
14. 2.617 km SSE of Tres Pinos, CaliforniaThu, Aug 10, 9:29 PM PDT · 17580 days ago · 3 km deep · 20 km away
15. 2.32 km NE of East Foothills, CaliforniaFri, Aug 11, 5:35 AM PDT · 17580 days ago · 0 km deep · 77 km away
16. 2.46 km NE of East Foothills, CaliforniaFri, Aug 11, 3:48 PM PDT · 17580 days ago · 8 km deep · 77 km away
17. 1.83 km NNW of Hollister, CaliforniaFri, Aug 11, 8:03 PM PDT · 17579 days ago · 7 km deep · 10 km away
18. 1.929 km ENE of Soledad, CaliforniaSat, Aug 12, 12:46 AM PDT · 17579 days ago · 6 km deep · 41 km away
19. 3.211 km S of Tres Pinos, CaliforniaSat, Aug 12, 7:58 PM PDT · 17578 days ago · 3 km deep · 13 km away
20. 1.929 km ENE of Soledad, CaliforniaMon, Aug 14, 3:30 AM PDT · 17577 days ago · 6 km deep · 39 km away
21. 1.71 km WSW of Tres Pinos, CaliforniaMon, Aug 14, 2:21 PM PDT · 17577 days ago · 6 km deep · 4 km away
22. 1.523 km NNE of San Lucas, CaliforniaMon, Aug 14, 7:59 PM PDT · 17576 days ago · 4 km deep · 69 km away
23. 1.810 km SE of Sunol, CaliforniaMon, Aug 14, 8:14 PM PDT · 17576 days ago · 5 km deep · 90 km away
24. 1.624 km E of Tres Pinos, CaliforniaTue, Aug 15, 7:06 PM PDT · 17575 days ago · 0 km deep · 30 km away
25. 2.421 km NE of Soledad, CaliforniaWed, Aug 16, 11:07 AM PDT · 17575 days ago · 5 km deep · 31 km away
26. 1.67 km NNE of Corralitos, CaliforniaWed, Aug 16, 7:16 PM PDT · 17574 days ago · 13 km deep · 45 km away
27. 1.69 km NW of Hollister, CaliforniaWed, Aug 16, 8:28 PM PDT · 17574 days ago · 4 km deep · 16 km away
28. 2.3Central CaliforniaWed, Aug 16, 9:10 PM PDT · 17574 days ago · 2 km deep · 47 km away
29. 2.323 km NNE of San Lucas, CaliforniaWed, Aug 16, 10:43 PM PDT · 17574 days ago · 6 km deep · 71 km away
30. 2.330 km SSW of South Dos Palos, CaliforniaThu, Aug 17, 12:04 AM PDT · 17574 days ago · 6 km deep · 49 km away
31. 2.6Central CaliforniaThu, Aug 17, 7:21 AM PDT · 17574 days ago · 7 km deep · 17 km away
32. 1.86 km NNE of Ridgemark, CaliforniaFri, Aug 18, 5:03 AM PDT · 17573 days ago · 6 km deep · 9 km away
33. 2.237 km SE of Big Sur, CaliforniaFri, Aug 18, 8:14 PM PDT · 17572 days ago · 10 km deep · 90 km away
34. 1.922 km NE of San Lucas, CaliforniaSat, Aug 19, 3:33 PM PDT · 17572 days ago · 6 km deep · 75 km away
35. 2.024 km E of Tres Pinos, CaliforniaSat, Aug 19, 8:40 PM PDT · 17571 days ago · 0 km deep · 30 km away
36. 2.124 km E of Tres Pinos, CaliforniaSat, Aug 19, 8:41 PM PDT · 17571 days ago · 1 km deep · 30 km away
37. 1.821 km NE of Soledad, CaliforniaMon, Aug 21, 11:20 AM PDT · 17570 days ago · 5 km deep · 31 km away
38. 1.68 km N of Morgan Hill, CaliforniaMon, Aug 21, 1:59 PM PDT · 17570 days ago · 4 km deep · 51 km away
39. 1.72 km SW of San Juan Bautista, CaliforniaTue, Aug 22, 2:44 AM PDT · 17569 days ago · 7 km deep · 16 km away
40. 1.723 km ENE of Soledad, CaliforniaTue, Aug 22, 9:46 AM PDT · 17569 days ago · 6 km deep · 44 km away
41. 2.31 km SW of Los Altos Hills, CaliforniaTue, Aug 22, 5:07 PM PDT · 17569 days ago · 4 km deep · 94 km away
42. 2.08 km WSW of Saratoga, CaliforniaWed, Aug 23, 6:16 AM PDT · 17568 days ago · 10 km deep · 80 km away
43. 3.126 km WNW of Diablo Grande, CaliforniaThu, Aug 24, 2:04 PM PDT · 17567 days ago · 5 km deep · 79 km away
44. 1.64 km SW of Tres Pinos, CaliforniaThu, Aug 24, 4:46 PM PDT · 17567 days ago · 6 km deep · 5 km away
45. 1.78 km NE of Gilroy, CaliforniaSun, Aug 27, 3:23 AM PDT · 17564 days ago · 8 km deep · 30 km away
46. 2.23 km NNW of Hollister, CaliforniaSun, Aug 27, 7:30 AM PDT · 17564 days ago · 7 km deep · 10 km away
47. 1.53 km W of Ridgemark, CaliforniaSun, Aug 27, 5:21 PM PDT · 17564 days ago · 7 km deep · 3 km away
48. 1.721 km NE of Soledad, CaliforniaSun, Aug 27, 5:24 PM PDT · 17564 days ago · 5 km deep · 36 km away
49. 2.32 km ESE of Tres Pinos, CaliforniaSun, Aug 27, 7:40 PM PDT · 17563 days ago · 9 km deep · 8 km away
50. 3.26 km SE of Sunol, CaliforniaSun, Aug 27, 8:32 PM PDT · 17563 days ago · 10 km deep · 93 km away
51. 1.92 km ESE of Aromas, CaliforniaSun, Aug 27, 10:33 PM PDT · 17563 days ago · 7 km deep · 23 km away
52. 3.021 km NE of Soledad, CaliforniaMon, Aug 28, 12:57 PM PDT · 17563 days ago · 7 km deep · 36 km away
53. 2.115 km SE of Livermore, CaliforniaMon, Aug 28, 1:42 PM PDT · 17563 days ago · 2 km deep · 90 km away
54. 2.39 km ESE of East Foothills, CaliforniaMon, Aug 28, 4:38 PM PDT · 17563 days ago · 7 km deep · 68 km away
55. 1.79 km ESE of East Foothills, CaliforniaMon, Aug 28, 4:47 PM PDT · 17563 days ago · 8 km deep · 68 km away
56. 4.19 km ESE of East Foothills, CaliforniaMon, Aug 28, 5:14 PM PDT · 17563 days ago · 8 km deep · 69 km away
57. 2.010 km ESE of East Foothills, CaliforniaMon, Aug 28, 5:16 PM PDT · 17563 days ago · 8 km deep · 68 km away
58. 1.89 km ESE of East Foothills, CaliforniaMon, Aug 28, 5:18 PM PDT · 17563 days ago · 8 km deep · 69 km away
59. 3.810 km ESE of East Foothills, CaliforniaMon, Aug 28, 5:18 PM PDT · 17563 days ago · 8 km deep · 67 km away
60. 1.59 km ESE of East Foothills, CaliforniaMon, Aug 28, 5:22 PM PDT · 17563 days ago · 7 km deep · 68 km away

The first 60 of 168.

Before

1. 2.025 km NE of Soledad, CaliforniaMon, Jul 31, 6:08 PM PDT · 17590 days ago · 12 km deep · 37 km away
2. 1.621 km NE of Soledad, CaliforniaMon, Jul 31, 2:54 PM PDT · 17591 days ago · 7 km deep · 33 km away
3. 2.03 km ESE of Tres Pinos, CaliforniaFri, Jul 28, 11:21 PM PDT · 17593 days ago · 9 km deep · 9 km away
4. 2.024 km NE of Greenfield, CaliforniaFri, Jul 28, 4:38 PM PDT · 17594 days ago · 4 km deep · 47 km away
5. 2.318 km SSE of Tres Pinos, CaliforniaFri, Jul 28, 10:13 AM PDT · 17594 days ago · 6 km deep · 21 km away
6. 2.340 km SSW of South Dos Palos, CaliforniaThu, Jul 27, 3:38 PM PDT · 17595 days ago · 4 km deep · 49 km away
7. 2.09 km NNW of Hollister, CaliforniaThu, Jul 27, 10:44 AM PDT · 17595 days ago · 5 km deep · 16 km away
8. 1.92 km W of Tres Pinos, CaliforniaWed, Jul 26, 10:44 PM PDT · 17595 days ago · 2 km deep · 4 km away
9. 2.08 km ENE of San Martin, CaliforniaWed, Jul 26, 11:12 AM PDT · 17596 days ago · 7 km deep · 39 km away
10. 2.225 km NE of Soledad, CaliforniaFri, Jul 21, 1:11 AM PDT · 17601 days ago · 8 km deep · 33 km away
11. 1.622 km ENE of Soledad, CaliforniaThu, Jul 20, 6:37 PM PDT · 17601 days ago · 4 km deep · 41 km away
12. 2.413 km N of Morgan Hill, CaliforniaThu, Jul 20, 9:40 AM PDT · 17602 days ago · 5 km deep · 56 km away
13. 1.822 km NE of San Lucas, CaliforniaThu, Jul 20, 12:29 AM PDT · 17602 days ago · 7 km deep · 76 km away
14. 1.925 km ESE of Tres Pinos, CaliforniaWed, Jul 19, 10:40 PM PDT · 17602 days ago · 4 km deep · 30 km away
15. 1.711 km ESE of Seven Trees, CaliforniaWed, Jul 19, 8:17 AM PDT · 17603 days ago · 4 km deep · 59 km away
16. 3.28 km NE of Interlaken, CaliforniaTue, Jul 18, 12:09 PM PDT · 17604 days ago · 5 km deep · 35 km away
17. 1.611 km NW of Big Sur, CaliforniaTue, Jul 18, 9:02 AM PDT · 17604 days ago · 6 km deep · 69 km away
18. 1.92 km SSW of Cambrian Park, CaliforniaMon, Jul 17, 4:43 PM PDT · 17605 days ago · 5 km deep · 70 km away
19. 2.65 km WSW of Gilroy, CaliforniaMon, Jul 17, 6:47 AM PDT · 17605 days ago · 6 km deep · 30 km away
20. 2.02 km W of Cambrian Park, CaliforniaMon, Jul 17, 2:09 AM PDT · 17605 days ago · 7 km deep · 73 km away

From the USGS Earthquake Hazards Program and its partner networks, event nc1041313. Read Mon, Sep 28, 2026, 12:10 PM UTC.