M2.9 earthquake 8 km NE of Ridgemark, California

Magnitude

2.9 (md), micro

Local time

Thu, Apr 21, 1983, 1:49 AM PST

UTC

1983-04-21 09:49:12 UTC

Depth

7.0 km (4.3 mi), shallow

Epicenter

36.869° N, 121.296° W

Region

California

Tsunami flag

No

Status

Reviewed by a seismologist

Location uncertainty

About 0.2 km horizontally, 0.3 km in depth

Magnitude uncertainty

±0.14

Depth from

From location

Station coverage gap

68°

Stations used

67

• Ridgemark, CaliforniaPopulation 3,016. Forecast9 kmNE
• Hollister, CaliforniaPopulation 37,462. Forecast10 kmENE
• Salinas, CaliforniaPopulation 157,380. Forecast38 kmNE
• Los Angeles, CaliforniaPopulation 3,820,914. Forecast418 kmNW

After

1. 2.422 km NE of Soledad, CaliforniaThu, Apr 21, 11:36 AM PST · 15868 days ago · 7 km deep · 40 km away
2. 1.512 km SSW of Loyola, CaliforniaThu, Apr 21, 5:06 PM PST · 15867 days ago · 9 km deep · 88 km away
3. 3.423 km ENE of San Lucas, CaliforniaFri, Apr 22, 1:12 AM PST · 15867 days ago · 6 km deep · 82 km away
4. 1.57 km ENE of Gilroy, CaliforniaFri, Apr 22, 1:14 AM PST · 15867 days ago · 4 km deep · 24 km away
5. 1.523 km NE of King City, CaliforniaFri, Apr 22, 11:41 AM PST · 15867 days ago · 5 km deep · 63 km away
6. 1.511 km SSW of Greenfield, CaliforniaFri, Apr 22, 12:08 PM PST · 15867 days ago · 13 km deep · 70 km away
7. 3.123 km ENE of San Lucas, CaliforniaFri, Apr 22, 8:05 PM PST · 15866 days ago · 7 km deep · 83 km away
8. 1.522 km NE of Soledad, CaliforniaSat, Apr 23, 12:07 PM PST · 15866 days ago · 13 km deep · 38 km away
9. 1.718 km SSE of Tres Pinos, CaliforniaSat, Apr 23, 9:36 PM PST · 15865 days ago · 10 km deep · 27 km away
10. 2.221 km NE of Soledad, CaliforniaSat, Apr 23, 10:28 PM PST · 15865 days ago · 8 km deep · 38 km away
11. 2.12 km SSW of San Juan Bautista, CaliforniaSun, Apr 24, 11:25 PM PDT · 15864 days ago · 4 km deep · 23 km away
12. 1.9Central CaliforniaMon, Apr 25, 3:30 PM PDT · 15864 days ago · 0 km deep · 60 km away
13. 2.1Central CaliforniaTue, Apr 26, 2:36 PM PDT · 15863 days ago · 5 km deep · 51 km away
14. 1.921 km NE of Soledad, CaliforniaTue, Apr 26, 8:55 PM PDT · 15862 days ago · 2 km deep · 34 km away
15. 1.67 km N of Boulder Creek, CaliforniaWed, Apr 27, 7:47 AM PDT · 15862 days ago · 3 km deep · 82 km away
16. 2.337 km SSW of South Dos Palos, CaliforniaWed, Apr 27, 10:03 AM PDT · 15862 days ago · 4 km deep · 44 km away
17. 1.522 km ENE of San Lucas, CaliforniaWed, Apr 27, 12:16 PM PDT · 15862 days ago · 5 km deep · 84 km away
18. 1.820 km SSE of Tres Pinos, CaliforniaWed, Apr 27, 12:26 PM PDT · 15862 days ago · 5 km deep · 29 km away
19. 2.120 km SSE of Tres Pinos, CaliforniaWed, Apr 27, 5:08 PM PDT · 15861 days ago · 5 km deep · 29 km away
20. 1.621 km SSE of Tres Pinos, CaliforniaWed, Apr 27, 7:41 PM PDT · 15861 days ago · 4 km deep · 29 km away
21. 1.721 km NE of Soledad, CaliforniaThu, Apr 28, 5:22 AM PDT · 15861 days ago · 5 km deep · 36 km away
22. 1.76 km WNW of Waterford, CaliforniaThu, Apr 28, 11:05 AM PDT · 15861 days ago · 22 km deep · 98 km away
23. 1.92 km NNE of Grayson, CaliforniaFri, Apr 29, 2:27 AM PDT · 15860 days ago · 10 km deep · 80 km away
24. 1.712 km NNE of Morgan Hill, CaliforniaFri, Apr 29, 6:46 PM PDT · 15859 days ago · 5 km deep · 50 km away
25. 1.56 km ENE of East Foothills, CaliforniaSat, Apr 30, 2:28 AM PDT · 15859 days ago · 6 km deep · 71 km away
26. 1.89 km NNE of Hollister, CaliforniaSat, Apr 30, 2:40 AM PDT · 15859 days ago · 7 km deep · 8 km away
27. 1.624 km NE of Greenfield, CaliforniaSat, Apr 30, 2:31 PM PDT · 15859 days ago · 5 km deep · 49 km away
28. 1.810 km SSE of San Juan Bautista, CaliforniaSat, Apr 30, 5:42 PM PDT · 15858 days ago · 7 km deep · 19 km away
29. 1.710 km S of Tres Pinos, CaliforniaSat, Apr 30, 10:29 PM PDT · 15858 days ago · 7 km deep · 19 km away
30. 2.38 km N of East Foothills, CaliforniaSun, May 1, 5:56 AM PDT · 15858 days ago · 6 km deep · 79 km away
31. 1.86 km E of Livermore, CaliforniaSun, May 1, 7:47 AM PDT · 15858 days ago · 4 km deep · 97 km away
32. 2.420 km SSE of Tres Pinos, CaliforniaSun, May 1, 9:40 AM PDT · 15858 days ago · 5 km deep · 28 km away
33. 2.510 km NE of San Martin, CaliforniaSun, May 1, 5:14 PM PDT · 15857 days ago · 8 km deep · 39 km away
34. 1.76 km WSW of Gilroy, CaliforniaSun, May 1, 6:31 PM PDT · 15857 days ago · 8 km deep · 33 km away
35. 1.822 km NE of San Lucas, CaliforniaMon, May 2, 8:40 AM PDT · 15857 days ago · 5 km deep · 74 km away
36. 3.59 km NE of Gilroy, CaliforniaMon, May 2, 10:58 AM PDT · 15857 days ago · 8 km deep · 27 km away
37. 2.411 km ESE of East Foothills, CaliforniaMon, May 2, 2:57 PM PDT · 15857 days ago · 7 km deep · 63 km away
38. 2.812 km ESE of East Foothills, CaliforniaMon, May 2, 3:03 PM PDT · 15857 days ago · 7 km deep · 62 km away
39. 2.617 km WNW of Coalinga, CaliforniaMon, May 2, 5:25 PM PDT · 15856 days ago · 21 km deep · 100 km away
40. 1.722 km NNE of San Lucas, CaliforniaMon, May 2, 6:08 PM PDT · 15856 days ago · 9 km deep · 73 km away
41. 2.118 km NNW of Coalinga, CaliforniaMon, May 2, 6:21 PM PDT · 15856 days ago · 10 km deep · 99 km away
42. 3.331 km SSW of Los Banos, CaliforniaMon, May 2, 6:23 PM PDT · 15856 days ago · 5 km deep · 32 km away
43. 2.619 km NNW of Coalinga, CaliforniaMon, May 2, 6:38 PM PDT · 15856 days ago · 11 km deep · 99 km away
44. 3.96 km S of San Juan Bautista, CaliforniaMon, May 2, 6:58 PM PDT · 15856 days ago · 4 km deep · 23 km away
45. 1.95 km N of Lockwood, CaliforniaMon, May 2, 7:21 PM PDT · 15856 days ago · 8 km deep · 99 km away
46. 3.039 km SSW of South Dos Palos, CaliforniaMon, May 2, 7:45 PM PDT · 15856 days ago · 2 km deep · 47 km away
47. 2.113 km ENE of Soledad, CaliforniaMon, May 2, 7:51 PM PDT · 15856 days ago · 0 km deep · 44 km away
48. 2.34 km S of Three Rocks, CaliforniaMon, May 2, 8:03 PM PDT · 15856 days ago · 8 km deep · 93 km away
49. 3.116 km SSW of Three Rocks, CaliforniaMon, May 2, 8:06 PM PDT · 15856 days ago · 0 km deep · 90 km away
50. 2.523 km SE of Tres Pinos, CaliforniaMon, May 2, 8:09 PM PDT · 15856 days ago · 7 km deep · 29 km away
51. 2.321 km NNW of Coalinga, CaliforniaMon, May 2, 8:18 PM PDT · 15856 days ago · 10 km deep · 96 km away
52. 2.418 km SW of Three Rocks, CaliforniaMon, May 2, 8:43 PM PDT · 15856 days ago · 5 km deep · 86 km away
53. 2.320 km NNW of Coalinga, CaliforniaMon, May 2, 10:06 PM PDT · 15856 days ago · 2 km deep · 99 km away
54. 1.626 km NE of San Ardo, CaliforniaTue, May 3, 12:26 AM PDT · 15856 days ago · 4 km deep · 94 km away
55. 1.724 km NW of Coalinga, CaliforniaTue, May 3, 12:51 AM PDT · 15856 days ago · 6 km deep · 92 km away
56. 1.923 km WNW of Coalinga, CaliforniaTue, May 3, 12:56 AM PDT · 15856 days ago · -1 km deep · 95 km away
57. 2.717 km NW of Coalinga, CaliforniaTue, May 3, 1:44 AM PDT · 15856 days ago · 13 km deep · 99 km away
58. 2.318 km WNW of Coalinga, CaliforniaTue, May 3, 2:03 AM PDT · 15856 days ago · 5 km deep · 99 km away
59. 1.918 km NNW of Coalinga, CaliforniaTue, May 3, 2:55 AM PDT · 15856 days ago · 10 km deep · 100 km away
60. 1.75 km NNE of Three Rocks, CaliforniaTue, May 3, 4:43 AM PDT · 15856 days ago · 5 km deep · 91 km away

The first 60 of 189.

Before

1. 3.411 km SSW of Loyola, CaliforniaThu, Apr 21, 12:09 AM PST · 15868 days ago · 10 km deep · 88 km away
2. 2.212 km S of Tres Pinos, CaliforniaWed, Apr 20, 9:00 AM PST · 15869 days ago · 5 km deep · 21 km away
3. 1.69 km NE of San Martin, CaliforniaWed, Apr 20, 5:26 AM PST · 15869 days ago · 6 km deep · 39 km away
4. 3.011 km S of Tres Pinos, CaliforniaTue, Apr 19, 6:06 PM PST · 15869 days ago · 4 km deep · 20 km away
5. 1.918 km SSW of Three Rocks, CaliforniaTue, Apr 19, 11:59 AM PST · 15870 days ago · 12 km deep · 92 km away
6. 2.122 km NE of San Lucas, CaliforniaTue, Apr 19, 5:54 AM PST · 15870 days ago · 5 km deep · 77 km away
7. 2.822 km NE of Soledad, CaliforniaMon, Apr 18, 5:48 PM PST · 15870 days ago · 2 km deep · 40 km away
8. 1.99 km SSW of Tres Pinos, CaliforniaMon, Apr 18, 5:20 PM PST · 15870 days ago · 3 km deep · 18 km away
9. 1.69 km NE of San Martin, CaliforniaMon, Apr 18, 5:58 AM PST · 15871 days ago · 8 km deep · 38 km away
10. 2.121 km NE of Soledad, CaliforniaSun, Apr 17, 10:50 PM PST · 15871 days ago · 2 km deep · 40 km away
11. 1.714 km SSE of Tres Pinos, CaliforniaSun, Apr 17, 4:40 PM PST · 15871 days ago · 4 km deep · 23 km away
12. 2.18 km SE of Alum Rock, CaliforniaSun, Apr 17, 1:29 AM PST · 15872 days ago · 4 km deep · 64 km away
13. 1.98 km SE of Alum Rock, CaliforniaSat, Apr 16, 10:56 PM PST · 15872 days ago · 3 km deep · 64 km away
14. 2.98 km SE of Alum Rock, CaliforniaSat, Apr 16, 10:51 PM PST · 15872 days ago · 3 km deep · 64 km away
15. 2.74 km SSW of Cantua Creek, CaliforniaSat, Apr 16, 5:10 PM PST · 15872 days ago · 6 km deep · 97 km away
16. 2.9Central CaliforniaSat, Apr 16, 12:48 PM PST · 15873 days ago · 6 km deep · 97 km away
17. 1.68 km NE of Corralitos, CaliforniaFri, Apr 15, 7:57 PM PST · 15873 days ago · 12 km deep · 45 km away
18. 1.88 km SSW of Tres Pinos, CaliforniaFri, Apr 15, 7:05 PM PST · 15873 days ago · 3 km deep · 18 km away
19. 2.124 km NE of Greenfield, CaliforniaFri, Apr 15, 3:05 PM PST · 15874 days ago · 5 km deep · 49 km away
20. 1.711 km SE of Big Sur, CaliforniaFri, Apr 15, 2:51 PM PST · 15874 days ago · 2 km deep · 83 km away

From the USGS Earthquake Hazards Program and its partner networks, event nc1090695 (also filed as ci12326875). Read Wed, Sep 30, 2026, 11:25 AM UTC.