M1.9 earthquake 2 km NNE of Grayson, California

Magnitude

1.9 (md), micro

Local time

Fri, Apr 29, 1983, 2:27 AM PDT

UTC

1983-04-29 09:27:54 UTC

Depth

9.5 km (5.9 mi), shallow

Epicenter

37.582° N, 121.164° W

Region

California

Tsunami flag

No

Status

Reviewed by a seismologist

Location uncertainty

About 0.3 km horizontally, 0.4 km in depth

Magnitude uncertainty

±0.09

Depth from

From location

Station coverage gap

134°

Stations used

41

• Grayson, CaliforniaPopulation 952. Forecast2 kmNNE
• Patterson, CaliforniaPopulation 21,498. Forecast13 kmNNW
• Modesto, CaliforniaPopulation 211,266. Forecast16 kmWSW
• Los Angeles, CaliforniaPopulation 3,820,914. Forecast473 kmNNW

After

1. 1.712 km NNE of Morgan Hill, CaliforniaFri, Apr 29, 6:46 PM PDT · 15860 days ago · 5 km deep · 56 km away
2. 1.56 km ENE of East Foothills, CaliforniaSat, Apr 30, 2:28 AM PDT · 15859 days ago · 6 km deep · 55 km away
3. 1.89 km NNE of Hollister, CaliforniaSat, Apr 30, 2:40 AM PDT · 15859 days ago · 7 km deep · 75 km away
4. 1.810 km SSE of San Juan Bautista, CaliforniaSat, Apr 30, 5:42 PM PDT · 15859 days ago · 7 km deep · 95 km away
5. 1.710 km S of Tres Pinos, CaliforniaSat, Apr 30, 10:29 PM PDT · 15859 days ago · 7 km deep · 99 km away
6. 2.38 km N of East Foothills, CaliforniaSun, May 1, 5:56 AM PDT · 15858 days ago · 6 km deep · 58 km away
7. 1.86 km E of Livermore, CaliforniaSun, May 1, 7:47 AM PDT · 15858 days ago · 4 km deep · 48 km away
8. 2.510 km NE of San Martin, CaliforniaSun, May 1, 5:14 PM PDT · 15858 days ago · 8 km deep · 58 km away
9. 1.76 km WSW of Gilroy, CaliforniaSun, May 1, 6:31 PM PDT · 15858 days ago · 8 km deep · 78 km away
10. 3.59 km NE of Gilroy, CaliforniaMon, May 2, 10:58 AM PDT · 15857 days ago · 8 km deep · 65 km away
11. 2.411 km ESE of East Foothills, CaliforniaMon, May 2, 2:57 PM PDT · 15857 days ago · 7 km deep · 55 km away
12. 2.812 km ESE of East Foothills, CaliforniaMon, May 2, 3:03 PM PDT · 15857 days ago · 7 km deep · 54 km away
13. 1.917 km S of Chinese Camp, CaliforniaMon, May 2, 3:06 PM PDT · 15857 days ago · 6 km deep · 65 km away
14. 3.331 km SSW of Los Banos, CaliforniaMon, May 2, 6:23 PM PDT · 15857 days ago · 5 km deep · 90 km away
15. 3.96 km S of San Juan Bautista, CaliforniaMon, May 2, 6:58 PM PDT · 15857 days ago · 4 km deep · 94 km away
16. 2.06 km SSE of San Juan Bautista, CaliforniaTue, May 3, 1:38 PM PDT · 15856 days ago · 6 km deep · 93 km away
17. 2.66 km SSE of San Juan Bautista, CaliforniaTue, May 3, 8:29 PM PDT · 15856 days ago · 6 km deep · 93 km away
18. 1.57 km NNE of East Foothills, CaliforniaThu, May 5, 4:50 AM PDT · 15854 days ago · 7 km deep · 57 km away
19. 1.910 km ESE of Blackhawk, CaliforniaThu, May 5, 1:41 PM PDT · 15854 days ago · 2 km deep · 61 km away
20. 1.7Northern CaliforniaThu, May 5, 8:25 PM PDT · 15854 days ago · 3 km deep · 61 km away
21. 1.77 km SSE of San Juan Bautista, CaliforniaThu, May 5, 11:59 PM PDT · 15854 days ago · 6 km deep · 93 km away
22. 2.43 km ESE of Berkeley, CaliforniaFri, May 6, 12:23 PM PDT · 15853 days ago · 6 km deep · 99 km away
23. 2.1Northern CaliforniaFri, May 6, 4:14 PM PDT · 15853 days ago · 16 km deep · 82 km away
24. 1.66 km SSE of San Juan Bautista, CaliforniaFri, May 6, 5:46 PM PDT · 15853 days ago · 6 km deep · 93 km away
25. 2.34 km SSE of San Juan Bautista, CaliforniaFri, May 6, 7:59 PM PDT · 15853 days ago · 6 km deep · 92 km away
26. 1.716 km ENE of East Foothills, CaliforniaSat, May 7, 8:01 PM PDT · 15852 days ago · 5 km deep · 45 km away
27. 3.211 km SW of Brentwood, CaliforniaSun, May 8, 12:07 AM PDT · 15852 days ago · 17 km deep · 62 km away
28. 2.21 km ESE of Country Club, CaliforniaSun, May 8, 9:31 AM PDT · 15851 days ago · 6 km deep · 45 km away
29. 2.66 km ESE of Sunol, CaliforniaMon, May 9, 8:51 AM PDT · 15850 days ago · 10 km deep · 58 km away
30. 2.36 km N of El Nido, CaliforniaTue, May 10, 10:27 AM PDT · 15849 days ago · 12 km deep · 73 km away
31. 1.63 km NNW of Hollister, CaliforniaWed, May 11, 4:10 PM PDT · 15848 days ago · 6 km deep · 81 km away
32. 1.79 km NNW of Hollister, CaliforniaFri, May 13, 5:17 AM PDT · 15846 days ago · 4 km deep · 76 km away
33. 2.13 km W of Orinda, CaliforniaFri, May 13, 2:09 PM PDT · 15846 days ago · 14 km deep · 99 km away
34. 1.64 km SSW of Clayton, CaliforniaSat, May 14, 6:20 AM PDT · 15845 days ago · 11 km deep · 78 km away
35. 1.66 km W of Drytown, CaliforniaMon, May 16, 2:38 PM PDT · 15843 days ago · 0 km deep · 97 km away
36. 2.310 km ESE of East Foothills, CaliforniaMon, May 16, 8:24 PM PDT · 15843 days ago · 8 km deep · 55 km away
37. 2.17 km NE of Hollister, CaliforniaWed, May 18, 8:45 PM PDT · 15841 days ago · 6 km deep · 78 km away
38. 1.67 km SE of Alum Rock, CaliforniaThu, May 19, 6:25 AM PDT · 15840 days ago · 8 km deep · 61 km away
39. 3.66 km SE of Alum Rock, CaliforniaThu, May 19, 7:46 AM PDT · 15840 days ago · 8 km deep · 61 km away
40. 1.61 km SSE of Drytown, CaliforniaThu, May 19, 10:09 AM PDT · 15840 days ago · 0 km deep · 98 km away
41. 1.86 km SE of Alum Rock, CaliforniaThu, May 19, 10:32 AM PDT · 15840 days ago · 8 km deep · 61 km away
42. 1.68 km ENE of San Martin, CaliforniaFri, May 20, 3:06 PM PDT · 15839 days ago · 5 km deep · 61 km away
43. 2.24 km SSE of San Juan Bautista, CaliforniaSat, May 21, 1:33 AM PDT · 15838 days ago · 3 km deep · 91 km away
44. 2.29 km SSW of Tres Pinos, CaliforniaSat, May 21, 8:56 AM PDT · 15838 days ago · 2 km deep · 99 km away
45. 1.99 km SSW of Tres Pinos, CaliforniaSat, May 21, 9:44 AM PDT · 15838 days ago · 2 km deep · 99 km away
46. 1.64 km SW of Ridgemark, CaliforniaSun, May 22, 8:50 PM PDT · 15837 days ago · 4 km deep · 91 km away
47. 1.64 km E of Seven Trees, CaliforniaMon, May 23, 8:32 PM PDT · 15836 days ago · 3 km deep · 63 km away
48. 1.811 km NNW of Boulder Creek, CaliforniaWed, May 25, 2:42 PM PDT · 15834 days ago · 7 km deep · 97 km away
49. 1.810 km E of Blackhawk, CaliforniaThu, May 26, 9:07 PM PDT · 15833 days ago · 14 km deep · 62 km away
50. 2.06 km ESE of East Foothills, CaliforniaMon, May 30, 2:45 AM PDT · 15829 days ago · 2 km deep · 57 km away
51. 1.725 km SW of South Dos Palos, CaliforniaMon, May 30, 5:09 PM PDT · 15829 days ago · -1 km deep · 89 km away
52. 1.80 km WSW of Castro Valley, CaliforniaTue, May 31, 11:54 AM PDT · 15828 days ago · 3 km deep · 83 km away
53. 1.84 km SE of Tracy, CaliforniaWed, Jun 1, 11:09 AM PDT · 15827 days ago · 12 km deep · 24 km away
54. 1.74 km S of San Juan Bautista, CaliforniaWed, Jun 1, 11:44 AM PDT · 15827 days ago · 10 km deep · 93 km away
55. 3.05 km NE of Fairview, CaliforniaWed, Jun 1, 5:32 PM PDT · 15827 days ago · 9 km deep · 75 km away
56. 2.222 km ESE of Tres Pinos, CaliforniaSat, Jun 4, 12:07 AM PDT · 15825 days ago · 1 km deep · 97 km away
57. 3.83 km N of Ashland, CaliforniaSat, Jun 4, 4:25 AM PDT · 15824 days ago · 5 km deep · 85 km away
58. 1.89 km E of San Martin, CaliforniaSat, Jun 4, 5:21 AM PDT · 15824 days ago · 9 km deep · 62 km away
59. 2.33 km N of Ashland, CaliforniaSat, Jun 4, 8:34 AM PDT · 15824 days ago · 5 km deep · 85 km away
60. 3.51 km ENE of Pittsburg, CaliforniaSun, Jun 5, 4:22 AM PDT · 15823 days ago · 17 km deep · 80 km away

The first 60 of 112.

Before

1. 1.76 km WNW of Waterford, CaliforniaThu, Apr 28, 11:05 AM PDT · 15861 days ago · 22 km deep · 31 km away
2. 3.02 km NE of Diablo, CaliforniaWed, Apr 27, 11:43 AM PDT · 15862 days ago · 10 km deep · 74 km away
3. 1.67 km N of Boulder Creek, CaliforniaWed, Apr 27, 7:47 AM PDT · 15862 days ago · 3 km deep · 95 km away
4. 2.12 km SSW of San Juan Bautista, CaliforniaSun, Apr 24, 11:25 PM PDT · 15865 days ago · 4 km deep · 91 km away
5. 1.57 km ENE of Gilroy, CaliforniaFri, Apr 22, 1:14 AM PST · 15867 days ago · 4 km deep · 69 km away
6. 1.512 km SSW of Loyola, CaliforniaThu, Apr 21, 5:06 PM PST · 15868 days ago · 9 km deep · 95 km away
7. 2.98 km NE of Ridgemark, CaliforniaThu, Apr 21, 1:49 AM PST · 15868 days ago · 7 km deep · 80 km away
8. 3.411 km SSW of Loyola, CaliforniaThu, Apr 21, 12:09 AM PST · 15868 days ago · 10 km deep · 95 km away
9. 1.69 km NE of San Martin, CaliforniaWed, Apr 20, 5:26 AM PST · 15869 days ago · 6 km deep · 58 km away
10. 1.99 km SSW of Tres Pinos, CaliforniaMon, Apr 18, 5:20 PM PST · 15871 days ago · 3 km deep · 98 km away
11. 1.69 km NE of San Martin, CaliforniaMon, Apr 18, 5:58 AM PST · 15871 days ago · 8 km deep · 58 km away
12. 1.83 km SE of Hayward, CaliforniaSun, Apr 17, 9:16 PM PST · 15872 days ago · 0 km deep · 79 km away
13. 2.18 km SE of Alum Rock, CaliforniaSun, Apr 17, 1:29 AM PST · 15872 days ago · 4 km deep · 59 km away
14. 1.98 km SE of Alum Rock, CaliforniaSat, Apr 16, 10:56 PM PST · 15873 days ago · 3 km deep · 59 km away
15. 2.98 km SE of Alum Rock, CaliforniaSat, Apr 16, 10:51 PM PST · 15873 days ago · 3 km deep · 59 km away
16. 1.68 km NE of Corralitos, CaliforniaFri, Apr 15, 7:57 PM PST · 15874 days ago · 12 km deep · 78 km away
17. 1.88 km SSW of Tres Pinos, CaliforniaFri, Apr 15, 7:05 PM PST · 15874 days ago · 3 km deep · 98 km away
18. 1.73 km N of Hollister, CaliforniaFri, Apr 15, 5:26 AM PST · 15874 days ago · 11 km deep · 80 km away
19. 1.58 km ENE of San Martin, CaliforniaFri, Apr 15, 1:25 AM PST · 15874 days ago · 2 km deep · 61 km away
20. 2.09 km ENE of Morgan Hill, CaliforniaThu, Apr 14, 8:12 PM PST · 15875 days ago · 3 km deep · 58 km away

From the USGS Earthquake Hazards Program and its partner networks, event nc1090983. Read Wed, Sep 30, 2026, 7:25 PM UTC.