M1.8 earthquake 4 km ESE of Aromas, California

Magnitude

1.8 (Md, duration), micro

Magnitude from

Northern California Seismic System

Local time

Sat, Jul 9, 1983, 11:22 AM PDT

UTC

1983-07-09 18:22:42 UTC

Depth

5.7 km (3.6 mi), shallow

Epicenter

36.865° N, 121.598° W

Region

California

Tsunami flag

No

Status

Reviewed by a seismologist

Location uncertainty

About 0.2 km horizontally, 0.4 km in depth

Magnitude uncertainty

±0.15

Depth from

From location

Station coverage gap

54°

Stations used

32

• Aromas, CaliforniaPopulation 2,650. Forecast5 kmESE
• Prunedale, CaliforniaPopulation 17,560. Forecast12 kmNNE
• Salinas, CaliforniaPopulation 157,380. Forecast21 kmNNE
• Los Angeles, CaliforniaPopulation 3,820,914. Forecast436 kmNW

After

1. 1.820 km SSE of Livermore, CaliforniaSat, Jul 9, 3:56 PM PDT · 15790 days ago · 6 km deep · 73 km away
2. 2.324 km NE of Greenfield, CaliforniaSun, Jul 10, 9:16 AM PDT · 15789 days ago · 7 km deep · 66 km away
3. 1.826 km SE of Big Sur, CaliforniaSun, Jul 10, 12:46 PM PDT · 15789 days ago · 12 km deep · 83 km away
4. 2.314 km SW of South Dos Palos, CaliforniaSun, Jul 10, 9:56 PM PDT · 15788 days ago · 4 km deep · 74 km away
5. 1.923 km ENE of San Lucas, CaliforniaMon, Jul 11, 12:16 AM PDT · 15788 days ago · 5 km deep · 99 km away
6. 2.025 km SE of Big Sur, CaliforniaMon, Jul 11, 1:38 AM PDT · 15788 days ago · 12 km deep · 80 km away
7. 1.623 km ENE of Tres Pinos, CaliforniaMon, Jul 11, 3:06 AM PDT · 15788 days ago · 0 km deep · 47 km away
8. 2.42 km E of East Foothills, CaliforniaMon, Jul 11, 6:03 AM PDT · 15788 days ago · 5 km deep · 60 km away
9. 1.722 km ENE of Soledad, CaliforniaMon, Jul 11, 4:08 PM PDT · 15788 days ago · 4 km deep · 59 km away
10. 1.723 km ENE of Soledad, CaliforniaTue, Jul 12, 12:24 AM PDT · 15787 days ago · 2 km deep · 60 km away
11. 2.325 km SSW of Los Banos, CaliforniaTue, Jul 12, 8:00 AM PDT · 15787 days ago · 0 km deep · 59 km away
12. 1.87 km NE of Interlaken, CaliforniaTue, Jul 12, 11:22 AM PDT · 15787 days ago · 4 km deep · 16 km away
13. 1.711 km S of Tres Pinos, CaliforniaWed, Jul 13, 1:04 PM PDT · 15786 days ago · 3 km deep · 32 km away
14. 1.522 km ENE of King City, CaliforniaThu, Jul 14, 6:44 AM PDT · 15785 days ago · 7 km deep · 87 km away
15. 1.728 km ESE of Big Sur, CaliforniaThu, Jul 14, 9:03 AM PDT · 15785 days ago · 13 km deep · 79 km away
16. 2.314 km E of Seven Trees, CaliforniaThu, Jul 14, 6:40 PM PDT · 15785 days ago · 8 km deep · 50 km away
17. 2.725 km ESE of Big Sur, CaliforniaThu, Jul 14, 7:20 PM PDT · 15785 days ago · 6 km deep · 78 km away
18. 2.226 km ESE of Big Sur, CaliforniaThu, Jul 14, 8:19 PM PDT · 15785 days ago · 7 km deep · 80 km away
19. 1.75 km NE of Interlaken, CaliforniaThu, Jul 14, 9:22 PM PDT · 15785 days ago · 12 km deep · 16 km away
20. 2.124 km ESE of Big Sur, CaliforniaThu, Jul 14, 10:57 PM PDT · 15784 days ago · 7 km deep · 78 km away
21. 1.826 km ESE of Big Sur, CaliforniaFri, Jul 15, 1:25 AM PDT · 15784 days ago · 13 km deep · 79 km away
22. 1.914 km E of Seven Trees, CaliforniaFri, Jul 15, 3:12 AM PDT · 15784 days ago · 2 km deep · 48 km away
23. 2.025 km ESE of Big Sur, CaliforniaFri, Jul 15, 4:13 PM PDT · 15784 days ago · 10 km deep · 77 km away
24. 1.825 km ENE of Greenfield, CaliforniaFri, Jul 15, 5:10 PM PDT · 15784 days ago · 3 km deep · 71 km away
25. 2.425 km ENE of Greenfield, CaliforniaFri, Jul 15, 5:36 PM PDT · 15784 days ago · 5 km deep · 70 km away
26. 2.725 km ESE of Big Sur, CaliforniaFri, Jul 15, 7:09 PM PDT · 15784 days ago · 7 km deep · 78 km away
27. 1.726 km SE of Big Sur, CaliforniaSat, Jul 16, 6:58 PM PDT · 15783 days ago · 4 km deep · 82 km away
28. 2.136 km SSW of South Dos Palos, CaliforniaSun, Jul 17, 2:22 PM PDT · 15782 days ago · 6 km deep · 69 km away
29. 1.826 km ESE of Big Sur, CaliforniaMon, Jul 18, 2:58 PM PDT · 15781 days ago · 9 km deep · 81 km away
30. 1.69 km NW of El Nido, CaliforniaMon, Jul 18, 10:22 PM PDT · 15780 days ago · 9 km deep · 99 km away
31. 2.126 km NE of Soledad, CaliforniaTue, Jul 19, 5:13 PM PDT · 15780 days ago · 7 km deep · 56 km away
32. 1.925 km ESE of Big Sur, CaliforniaTue, Jul 19, 6:39 PM PDT · 15780 days ago · 9 km deep · 79 km away
33. 1.715 km SSE of Tres Pinos, CaliforniaWed, Jul 20, 3:54 AM PDT · 15779 days ago · 5 km deep · 37 km away
34. 1.724 km ENE of Soledad, CaliforniaWed, Jul 20, 12:50 PM PDT · 15779 days ago · 6 km deep · 62 km away
35. 1.826 km ESE of Big Sur, CaliforniaWed, Jul 20, 6:01 PM PDT · 15779 days ago · 6 km deep · 76 km away
36. 3.926 km ESE of Big Sur, CaliforniaWed, Jul 20, 6:23 PM PDT · 15779 days ago · 6 km deep · 79 km away
37. 2.225 km ESE of Big Sur, CaliforniaWed, Jul 20, 6:25 PM PDT · 15779 days ago · 8 km deep · 79 km away
38. 1.925 km SE of Big Sur, CaliforniaWed, Jul 20, 6:30 PM PDT · 15779 days ago · 4 km deep · 83 km away
39. 2.026 km SE of Big Sur, CaliforniaWed, Jul 20, 6:30 PM PDT · 15779 days ago · 4 km deep · 81 km away
40. 2.024 km SE of Big Sur, CaliforniaWed, Jul 20, 6:32 PM PDT · 15779 days ago · 6 km deep · 80 km away
41. 2.025 km ESE of Big Sur, CaliforniaWed, Jul 20, 6:33 PM PDT · 15779 days ago · 8 km deep · 79 km away
42. 2.425 km ESE of Big Sur, CaliforniaWed, Jul 20, 6:34 PM PDT · 15779 days ago · 9 km deep · 80 km away
43. 2.025 km SE of Big Sur, CaliforniaWed, Jul 20, 6:38 PM PDT · 15779 days ago · 6 km deep · 80 km away
44. 2.125 km SE of Big Sur, CaliforniaWed, Jul 20, 6:39 PM PDT · 15779 days ago · 8 km deep · 80 km away
45. 1.728 km ESE of Big Sur, CaliforniaWed, Jul 20, 6:46 PM PDT · 15779 days ago · 8 km deep · 80 km away
46. 2.526 km ESE of Big Sur, CaliforniaWed, Jul 20, 6:55 PM PDT · 15779 days ago · 5 km deep · 78 km away
47. 1.925 km ESE of Big Sur, CaliforniaWed, Jul 20, 7:29 PM PDT · 15779 days ago · 8 km deep · 78 km away
48. 1.826 km ESE of Big Sur, CaliforniaWed, Jul 20, 8:16 PM PDT · 15779 days ago · 9 km deep · 79 km away
49. 1.926 km ESE of Big Sur, CaliforniaWed, Jul 20, 9:30 PM PDT · 15779 days ago · 2 km deep · 78 km away
50. 2.325 km ESE of Big Sur, CaliforniaWed, Jul 20, 10:43 PM PDT · 15778 days ago · 8 km deep · 78 km away
51. 1.725 km SE of Big Sur, CaliforniaWed, Jul 20, 10:48 PM PDT · 15778 days ago · 9 km deep · 80 km away
52. 1.727 km WSW of Greenfield, CaliforniaWed, Jul 20, 11:14 PM PDT · 15778 days ago · 3 km deep · 75 km away
53. 1.925 km ESE of Big Sur, CaliforniaWed, Jul 20, 11:42 PM PDT · 15778 days ago · 6 km deep · 80 km away
54. 1.925 km ESE of Big Sur, CaliforniaWed, Jul 20, 11:43 PM PDT · 15778 days ago · 5 km deep · 80 km away
55. 1.925 km ESE of Big Sur, CaliforniaWed, Jul 20, 11:45 PM PDT · 15778 days ago · 8 km deep · 79 km away
56. 2.025 km ESE of Big Sur, CaliforniaWed, Jul 20, 11:48 PM PDT · 15778 days ago · 7 km deep · 79 km away
57. 2.325 km ESE of Big Sur, CaliforniaThu, Jul 21, 5:26 AM PDT · 15778 days ago · 8 km deep · 79 km away
58. 2.825 km ESE of Big Sur, CaliforniaThu, Jul 21, 6:00 AM PDT · 15778 days ago · 6 km deep · 78 km away
59. 2.626 km ESE of Big Sur, CaliforniaThu, Jul 21, 8:32 AM PDT · 15778 days ago · 6 km deep · 78 km away
60. 2.725 km ENE of Greenfield, CaliforniaThu, Jul 21, 5:48 PM PDT · 15778 days ago · 4 km deep · 71 km away

The first 60 of 172.

Before

1. 1.921 km WNW of Three Rocks, CaliforniaSat, Jul 9, 4:33 AM PDT · 15790 days ago · 13 km deep · 93 km away
2. 2.88 km NE of Corralitos, CaliforniaSat, Jul 9, 1:32 AM PDT · 15790 days ago · 12 km deep · 22 km away
3. 1.922 km ESE of Big Sur, CaliforniaFri, Jul 8, 10:20 PM PDT · 15790 days ago · 5 km deep · 75 km away
4. 2.414 km NNE of Morgan Hill, CaliforniaFri, Jul 8, 12:31 PM PDT · 15791 days ago · 4 km deep · 43 km away
5. 1.623 km SE of Big Sur, CaliforniaThu, Jul 7, 8:44 PM PDT · 15792 days ago · 0 km deep · 81 km away
6. 2.122 km ESE of Big Sur, CaliforniaThu, Jul 7, 3:02 PM PDT · 15792 days ago · 6 km deep · 74 km away
7. 1.826 km ESE of Big Sur, CaliforniaThu, Jul 7, 11:01 AM PDT · 15792 days ago · 5 km deep · 79 km away
8. 1.627 km ESE of Big Sur, CaliforniaThu, Jul 7, 10:47 AM PDT · 15792 days ago · 13 km deep · 79 km away
9. 1.6Central CaliforniaThu, Jul 7, 8:04 AM PDT · 15792 days ago · 3 km deep · 80 km away
10. 1.722 km ESE of Big Sur, CaliforniaThu, Jul 7, 4:35 AM PDT · 15792 days ago · 6 km deep · 74 km away
11. 2.122 km NE of San Lucas, CaliforniaThu, Jul 7, 2:21 AM PDT · 15792 days ago · 7 km deep · 97 km away
12. 2.123 km ESE of Big Sur, CaliforniaWed, Jul 6, 9:58 PM PDT · 15792 days ago · 6 km deep · 75 km away
13. 2.317 km W of Diablo Grande, CaliforniaWed, Jul 6, 9:55 PM PDT · 15792 days ago · 6 km deep · 60 km away
14. 1.65 km SSW of Gilroy, CaliforniaWed, Jul 6, 4:02 PM PDT · 15793 days ago · 6 km deep · 11 km away
15. 1.724 km ESE of Big Sur, CaliforniaTue, Jul 5, 2:47 PM PDT · 15794 days ago · 6 km deep · 79 km away
16. 1.724 km NE of Greenfield, CaliforniaTue, Jul 5, 2:28 AM PDT · 15794 days ago · 5 km deep · 70 km away
17. 2.27 km E of East Foothills, CaliforniaMon, Jul 4, 10:46 PM PDT · 15794 days ago · 6 km deep · 57 km away
18. 2.22 km SW of San Juan Bautista, CaliforniaMon, Jul 4, 5:09 AM PDT · 15795 days ago · 7 km deep · 5 km away
19. 2.223 km NE of Greenfield, CaliforniaMon, Jul 4, 3:43 AM PDT · 15795 days ago · 5 km deep · 67 km away
20. 1.69 km NE of San Martin, CaliforniaSun, Jul 3, 10:18 PM PDT · 15795 days ago · 6 km deep · 32 km away

From the USGS Earthquake Hazards Program and its partner networks, event nc1098332. Read Thu, Oct 1, 2026, 4:21 PM UTC.