M2.1 earthquake 2 km ESE of Aromas, California

Magnitude

2.1 (md), micro

Local time

Tue, Jul 28, 1981, 1:38 PM PDT

UTC

1981-07-28 20:38:11 UTC

Depth

6.7 km (4.2 mi), shallow

Epicenter

36.880° N, 121.616° W

Region

California

Tsunami flag

No

Status

Reviewed by a seismologist

Location uncertainty

About 0.1 km horizontally, 0.3 km in depth

Magnitude uncertainty

±0.20

Depth from

From location

Station coverage gap

55°

Stations used

62

• Aromas, CaliforniaPopulation 2,650. Forecast3 kmESE
• Prunedale, CaliforniaPopulation 17,560. Forecast13 kmNNE
• Salinas, CaliforniaPopulation 157,380. Forecast23 kmN
• Los Angeles, CaliforniaPopulation 3,820,914. Forecast438 kmNW

After

1. 1.63 km ESE of Aromas, CaliforniaTue, Jul 28, 2:08 PM PDT · 16498 days ago · 7 km deep · 1 km away
2. 2.121 km NE of Soledad, CaliforniaTue, Jul 28, 2:29 PM PDT · 16498 days ago · 6 km deep · 52 km away
3. 1.58 km NE of San Martin, CaliforniaTue, Jul 28, 2:49 PM PDT · 16498 days ago · 8 km deep · 29 km away
4. 1.530 km ENE of Soledad, CaliforniaTue, Jul 28, 3:40 PM PDT · 16498 days ago · 8 km deep · 62 km away
5. 1.713 km SSE of Tres Pinos, CaliforniaThu, Jul 30, 12:44 AM PDT · 16497 days ago · 5 km deep · 38 km away
6. 2.014 km SSE of Tres Pinos, CaliforniaThu, Jul 30, 6:59 AM PDT · 16496 days ago · 4 km deep · 38 km away
7. 1.89 km NNE of East Foothills, CaliforniaThu, Jul 30, 9:25 AM PDT · 16496 days ago · 6 km deep · 67 km away
8. 2.025 km NE of Soledad, CaliforniaThu, Jul 30, 3:11 PM PDT · 16496 days ago · 7 km deep · 52 km away
9. 2.438 km W of Three Rocks, CaliforniaThu, Jul 30, 9:05 PM PDT · 16496 days ago · 6 km deep · 80 km away
10. 2.938 km W of Three Rocks, CaliforniaThu, Jul 30, 9:26 PM PDT · 16496 days ago · 7 km deep · 81 km away
11. 1.738 km W of Three Rocks, CaliforniaFri, Jul 31, 2:58 AM PDT · 16496 days ago · 4 km deep · 80 km away
12. 2.213 km NE of East Foothills, CaliforniaFri, Jul 31, 8:41 AM PDT · 16495 days ago · 8 km deep · 67 km away
13. 1.938 km W of Three Rocks, CaliforniaFri, Jul 31, 6:57 PM PDT · 16495 days ago · 8 km deep · 80 km away
14. 1.738 km W of Three Rocks, CaliforniaFri, Jul 31, 7:01 PM PDT · 16495 days ago · 8 km deep · 80 km away
15. 1.838 km W of Three Rocks, CaliforniaFri, Jul 31, 7:06 PM PDT · 16495 days ago · 7 km deep · 80 km away
16. 1.638 km W of Three Rocks, CaliforniaFri, Jul 31, 7:07 PM PDT · 16495 days ago · 7 km deep · 80 km away
17. 1.638 km W of Three Rocks, CaliforniaFri, Jul 31, 7:10 PM PDT · 16495 days ago · 6 km deep · 80 km away
18. 1.637 km W of Three Rocks, CaliforniaFri, Jul 31, 7:34 PM PDT · 16495 days ago · 5 km deep · 81 km away
19. 2.338 km W of Three Rocks, CaliforniaFri, Jul 31, 11:21 PM PDT · 16495 days ago · 8 km deep · 81 km away
20. 2.516 km ENE of San Martin, CaliforniaSat, Aug 1, 10:05 AM PDT · 16494 days ago · 7 km deep · 35 km away
21. 2.038 km W of Three Rocks, CaliforniaMon, Aug 3, 2:58 AM PDT · 16493 days ago · 6 km deep · 80 km away
22. 2.69 km NE of Gilroy, CaliforniaMon, Aug 3, 8:05 PM PDT · 16492 days ago · 9 km deep · 23 km away
23. 2.324 km NE of Greenfield, CaliforniaMon, Aug 3, 11:20 PM PDT · 16492 days ago · 3 km deep · 68 km away
24. 1.738 km W of Three Rocks, CaliforniaTue, Aug 4, 3:36 AM PDT · 16492 days ago · 5 km deep · 80 km away
25. 1.638 km W of Three Rocks, CaliforniaTue, Aug 4, 5:24 AM PDT · 16492 days ago · 5 km deep · 80 km away
26. 2.78 km SSW of Tres Pinos, CaliforniaTue, Aug 4, 6:21 AM PDT · 16491 days ago · 2 km deep · 28 km away
27. 3.18 km SSW of Tres Pinos, CaliforniaTue, Aug 4, 6:27 AM PDT · 16491 days ago · 2 km deep · 28 km away
28. 2.737 km W of Three Rocks, CaliforniaWed, Aug 5, 1:41 AM PDT · 16491 days ago · 7 km deep · 81 km away
29. 2.038 km W of Three Rocks, CaliforniaWed, Aug 5, 2:10 AM PDT · 16491 days ago · 5 km deep · 81 km away
30. 1.638 km W of Three Rocks, CaliforniaWed, Aug 5, 12:13 PM PDT · 16490 days ago · 5 km deep · 80 km away
31. 1.838 km W of Three Rocks, CaliforniaWed, Aug 5, 2:44 PM PDT · 16490 days ago · 4 km deep · 80 km away
32. 1.838 km W of Three Rocks, CaliforniaWed, Aug 5, 2:47 PM PDT · 16490 days ago · 7 km deep · 80 km away
33. 2.338 km W of Three Rocks, CaliforniaWed, Aug 5, 10:51 PM PDT · 16490 days ago · 4 km deep · 80 km away
34. 1.821 km NE of Soledad, CaliforniaThu, Aug 6, 12:13 AM PDT · 16490 days ago · 6 km deep · 50 km away
35. 1.738 km W of Three Rocks, CaliforniaThu, Aug 6, 3:52 AM PDT · 16490 days ago · 5 km deep · 80 km away
36. 2.637 km W of Three Rocks, CaliforniaThu, Aug 6, 2:35 PM PDT · 16489 days ago · 7 km deep · 81 km away
37. 1.5Central CaliforniaThu, Aug 6, 5:54 PM PDT · 16489 days ago · 4 km deep · 80 km away
38. 1.613 km N of Morgan Hill, CaliforniaFri, Aug 7, 3:08 AM PDT · 16489 days ago · 6 km deep · 41 km away
39. 1.97 km NE of Ridgemark, CaliforniaFri, Aug 7, 4:24 AM PDT · 16489 days ago · 6 km deep · 28 km away
40. 1.88 km ENE of Gilroy, CaliforniaFri, Aug 7, 8:01 AM PDT · 16488 days ago · 6 km deep · 20 km away
41. 1.619 km E of Tres Pinos, CaliforniaSat, Aug 8, 6:47 AM PDT · 16487 days ago · 5 km deep · 47 km away
42. 1.539 km W of Three Rocks, CaliforniaSat, Aug 8, 7:06 AM PDT · 16487 days ago · 11 km deep · 80 km away
43. 1.611 km ESE of Tres Pinos, CaliforniaSat, Aug 8, 10:27 PM PDT · 16487 days ago · 10 km deep · 40 km away
44. 1.538 km W of Three Rocks, CaliforniaSat, Aug 8, 11:38 PM PDT · 16487 days ago · 7 km deep · 80 km away
45. 2.07 km E of East Foothills, CaliforniaSun, Aug 9, 6:38 AM PDT · 16486 days ago · 7 km deep · 57 km away
46. 1.87 km E of East Foothills, CaliforniaSun, Aug 9, 6:41 AM PDT · 16486 days ago · 7 km deep · 57 km away
47. 1.55 km SSW of Gilroy, CaliforniaMon, Aug 10, 5:36 AM PDT · 16486 days ago · 7 km deep · 10 km away
48. 1.97 km N of Hollister, CaliforniaMon, Aug 10, 11:45 PM PDT · 16485 days ago · 7 km deep · 21 km away
49. 1.97 km N of Hollister, CaliforniaTue, Aug 11, 12:01 AM PDT · 16485 days ago · 8 km deep · 21 km away
50. 2.710 km ESE of East Foothills, CaliforniaTue, Aug 11, 2:41 PM PDT · 16484 days ago · 8 km deep · 52 km away
51. 1.610 km E of Gilroy, CaliforniaTue, Aug 11, 3:11 PM PDT · 16484 days ago · 5 km deep · 20 km away
52. 1.79 km NE of San Martin, CaliforniaTue, Aug 11, 11:28 PM PDT · 16484 days ago · 8 km deep · 31 km away
53. 1.521 km NE of Soledad, CaliforniaWed, Aug 12, 9:54 AM PDT · 16483 days ago · 8 km deep · 57 km away
54. 1.6Northern CaliforniaWed, Aug 12, 1:54 PM PDT · 16483 days ago · 13 km deep · 38 km away
55. 1.612 km ESE of East Foothills, CaliforniaWed, Aug 12, 4:12 PM PDT · 16483 days ago · 5 km deep · 50 km away
56. 1.76 km SE of Lexington Hills, CaliforniaThu, Aug 13, 5:32 PM PDT · 16482 days ago · 11 km deep · 39 km away
57. 4.22 km ESE of Tres Pinos, CaliforniaFri, Aug 14, 5:49 AM PDT · 16482 days ago · 9 km deep · 31 km away
58. 2.63 km ESE of Tres Pinos, CaliforniaFri, Aug 14, 5:53 AM PDT · 16482 days ago · 8 km deep · 31 km away
59. 1.65 km WSW of Gilroy, CaliforniaFri, Aug 14, 10:43 AM PDT · 16481 days ago · 4 km deep · 11 km away
60. 2.94 km W of San Juan Bautista, CaliforniaSat, Aug 15, 2:22 AM PDT · 16481 days ago · 6 km deep · 4 km away

The first 60 of 167.

Before

1. 1.811 km S of Tres Pinos, CaliforniaTue, Jul 28, 6:47 AM PDT · 16498 days ago · 4 km deep · 34 km away
2. 1.615 km N of Morgan Hill, CaliforniaTue, Jul 28, 2:26 AM PDT · 16499 days ago · 2 km deep · 43 km away
3. 1.77 km ESE of East Foothills, CaliforniaTue, Jul 28, 12:39 AM PDT · 16499 days ago · 1 km deep · 54 km away
4. 1.716 km S of Davenport, CaliforniaMon, Jul 27, 11:54 PM PDT · 16499 days ago · 4 km deep · 51 km away
5. 1.63 km WNW of Dublin, CaliforniaMon, Jul 27, 11:24 PM PDT · 16499 days ago · 6 km deep · 98 km away
6. 2.04 km SE of Alum Rock, CaliforniaMon, Jul 27, 6:08 PM PDT · 16499 days ago · 3 km deep · 54 km away
7. 1.58 km SSW of Ridgemark, CaliforniaSat, Jul 25, 5:01 PM PDT · 16501 days ago · 6 km deep · 25 km away
8. 1.730 km ENE of Soledad, CaliforniaSat, Jul 25, 2:50 PM PDT · 16501 days ago · 7 km deep · 63 km away
9. 3.031 km ENE of Soledad, CaliforniaSat, Jul 25, 2:48 PM PDT · 16501 days ago · 9 km deep · 62 km away
10. 1.99 km NE of Gilroy, CaliforniaSat, Jul 25, 12:34 PM PDT · 16501 days ago · 9 km deep · 24 km away
11. 1.522 km NE of San Lucas, CaliforniaSat, Jul 25, 4:59 AM PDT · 16502 days ago · 6 km deep · 97 km away
12. 1.54 km ENE of La Honda, CaliforniaFri, Jul 24, 12:16 AM PDT · 16503 days ago · 10 km deep · 74 km away
13. 1.615 km E of Seven Trees, CaliforniaThu, Jul 23, 3:23 AM PDT · 16504 days ago · 6 km deep · 45 km away
14. 1.824 km NE of Greenfield, CaliforniaThu, Jul 23, 2:08 AM PDT · 16504 days ago · 7 km deep · 67 km away
15. 1.64 km NNE of East Foothills, CaliforniaWed, Jul 22, 7:18 AM PDT · 16504 days ago · 2 km deep · 62 km away
16. 1.89 km NNW of Hollister, CaliforniaWed, Jul 22, 2:30 AM PDT · 16505 days ago · 4 km deep · 15 km away
17. 1.921 km NE of East Foothills, CaliforniaMon, Jul 20, 3:33 AM PDT · 16507 days ago · 3 km deep · 70 km away
18. 1.69 km NE of San Martin, CaliforniaSun, Jul 19, 9:50 PM PDT · 16507 days ago · 9 km deep · 30 km away
19. 2.27 km SSE of San Juan Bautista, CaliforniaSun, Jul 19, 9:39 PM PDT · 16507 days ago · 8 km deep · 14 km away
20. 1.68 km NE of Gilroy, CaliforniaSun, Jul 19, 9:00 PM PDT · 16507 days ago · 8 km deep · 23 km away

From the USGS Earthquake Hazards Program and its partner networks, event nc1066052. Read Tue, Sep 29, 2026, 12:43 AM UTC.