M2.1 earthquake 9km NW of Delta, B.C., MX

Magnitude

2.1 (mc), micro

Local time

Mon, Jul 27, 1981, 8:33 PM PDT

UTC

1981-07-28 03:33:15 UTC

Depth

6.0 km (3.7 mi), shallow

Epicenter

32.417° N, 115.259° W

Region

Mexico

Tsunami flag

No

Status

Reviewed by a seismologist

Location uncertainty

About 2.4 km horizontally, 31.6 km in depth

Depth from

Operator assigned

Station coverage gap

225°, poorly surrounded by stations

Stations used

12

• Puebla, MexicoPopulation 15,168. Forecast19 kmSSE
• Mexicali, MexicoPopulation 1,032,686. Forecast30 kmSE

After

1. 1.525km ESE of Ocotillo Wells, CAWed, Jul 29, 6:34 AM PDT · 16492 days ago · 9 km deep · 91 km away
2. 1.96km WSW of Brawley, CAWed, Jul 29, 12:24 PM PDT · 16491 days ago · 15 km deep · 68 km away
3. 2.268km ENE of Maneadero, B.C., MXThu, Jul 30, 2:51 PM PDT · 16490 days ago · 6 km deep · 82 km away
4. 1.54km WNW of Guadalupe Victoria, B.C., MXThu, Jul 30, 9:48 PM PDT · 16490 days ago · 6 km deep · 17 km away
5. 1.612km SW of Westmorland, CASat, Aug 1, 9:08 AM PDT · 16489 days ago · 10 km deep · 75 km away
6. 1.94km NNW of Guadalupe Victoria, B.C., MXSun, Aug 2, 1:22 PM PDT · 16487 days ago · 6 km deep · 16 km away
7. 1.912km N of Delta, B.C., MXSun, Aug 2, 10:42 PM PDT · 16487 days ago · 6 km deep · 9 km away
8. 1.713km SW of Westmorland, CAWed, Aug 5, 8:40 AM PDT · 16485 days ago · 3 km deep · 76 km away
9. 1.716km W of Alberto Oviedo Mota, B.C., MXSat, Aug 8, 12:06 AM PDT · 16482 days ago · 6 km deep · 20 km away
10. 3.013km WSW of Imperial, CASat, Aug 8, 9:43 PM PDT · 16481 days ago · 22 km deep · 61 km away
11. 1.52km SSW of Brawley, CASun, Aug 9, 6:31 PM PDT · 16480 days ago · 15 km deep · 66 km away
12. 1.73km SSW of Brawley, CAMon, Aug 10, 10:20 AM PDT · 16479 days ago · 12 km deep · 65 km away
13. 1.914km W of El Centro, CAMon, Aug 10, 6:53 PM PDT · 16479 days ago · 14 km deep · 58 km away
14. 2.316km ESE of Campo, CAWed, Aug 12, 8:59 AM PDT · 16478 days ago · 2 km deep · 100 km away
15. 1.712km SE of Puebla, B.C., MXFri, Aug 14, 6:49 PM PDT · 16475 days ago · 6 km deep · 8 km away
16. 1.64km NNW of Westmorland, CAMon, Aug 17, 12:56 PM PDT · 16472 days ago · 11 km deep · 81 km away
17. 1.617km ESE of Campo, CAMon, Aug 17, 10:42 PM PDT · 16472 days ago · 7 km deep · 99 km away
18. 2.465km E of Maneadero, B.C., MXTue, Aug 18, 5:12 AM PDT · 16472 days ago · 6 km deep · 90 km away
19. 2.44km SE of Westmorland, CATue, Aug 18, 8:00 PM PDT · 16471 days ago · 5 km deep · 73 km away
20. 1.523km ESE of Ocotillo Wells, CAThu, Aug 20, 2:13 PM PDT · 16469 days ago · 4 km deep · 92 km away
21. 2.546km S of Estacion Coahuila, B.C., MXFri, Aug 21, 2:17 AM PDT · 16469 days ago · 6 km deep · 74 km away
22. 2.04km WSW of Brawley, CAFri, Aug 21, 6:18 AM PDT · 16469 days ago · 5 km deep · 68 km away
23. 1.67km N of Imperial, CASat, Aug 22, 12:12 PM PDT · 16467 days ago · 12 km deep · 62 km away
24. 2.559km S of Estacion Coahuila, B.C., MXSat, Aug 22, 1:15 PM PDT · 16467 days ago · 6 km deep · 89 km away
25. 1.99km ENE of Calexico, CAThu, Aug 27, 3:23 AM PDT · 16463 days ago · 17 km deep · 37 km away
26. 2.326km WSW of Westmorland, CAFri, Aug 28, 3:06 AM PDT · 16462 days ago · 11 km deep · 83 km away
27. 1.510km E of Puebla, B.C., MXFri, Aug 28, 10:15 PM PDT · 16461 days ago · 6 km deep · 17 km away
28. 2.217km ESE of Campo, CASun, Aug 30, 6:17 AM PDT · 16460 days ago · 8 km deep · 99 km away
29. 2.668km S of Estacion Coahuila, B.C., MXSun, Aug 30, 6:57 AM PDT · 16460 days ago · 6 km deep · 95 km away
30. 2.351km ENE of Maneadero, B.C., MXSun, Aug 30, 6:20 PM PDT · 16459 days ago · 6 km deep · 100 km away
31. 2.466km S of Estacion Coahuila, B.C., MXMon, Aug 31, 12:48 AM PDT · 16459 days ago · 6 km deep · 93 km away
32. 3.530 km S of Ejido Doctor Alberto Oviedo Mota (El Indiviso), MexicoMon, Aug 31, 1:50 AM PDT · 16459 days ago · 6 km deep · 77 km away
33. 1.719km ESE of Campo, CATue, Sep 1, 5:40 PM PDT · 16457 days ago · 6 km deep · 98 km away
34. 1.86km NNW of Westmorland, CAThu, Sep 3, 1:03 AM PDT · 16456 days ago · 11 km deep · 83 km away
35. 1.64km NNW of Westmorland, CAThu, Sep 3, 7:45 AM PDT · 16456 days ago · 10 km deep · 81 km away
36. 2.712km ESE of Puebla, B.C., MXThu, Sep 3, 1:31 PM PDT · 16455 days ago · 6 km deep · 12 km away
37. 1.714km NNW of Delta, B.C., MXThu, Sep 3, 7:11 PM PDT · 16455 days ago · 6 km deep · 7 km away
38. 2.19km NNW of Delta, B.C., MXFri, Sep 4, 5:32 AM PDT · 16455 days ago · 6 km deep · 2 km away
39. 2.681km SSW of Alberto Oviedo Mota, B.C., MXFri, Sep 4, 9:19 AM PDT · 16455 days ago · 5 km deep · 97 km away
40. 1.822km WSW of Progreso, B.C., MXFri, Sep 4, 3:45 PM PDT · 16454 days ago · 8 km deep · 53 km away
41. 1.68km SW of Holtville, CASun, Sep 6, 3:26 AM PDT · 16453 days ago · 6 km deep · 43 km away
42. 2.016km W of Progreso, B.C., MXSun, Sep 6, 10:11 PM PDT · 16452 days ago · 14 km deep · 49 km away
43. 2.471km ENE of Maneadero, B.C., MXMon, Sep 7, 6:39 PM PDT · 16451 days ago · 6 km deep · 79 km away
44. 3.59km WSW of Puebla, B.C., MXWed, Sep 9, 11:06 AM PDT · 16449 days ago · 6 km deep · 21 km away
45. 1.53km SW of Brawley, CAWed, Sep 9, 1:55 PM PDT · 16449 days ago · 14 km deep · 66 km away
46. 2.065km WSW of Alberto Oviedo Mota, B.C., MXFri, Sep 11, 11:58 AM PDT · 16447 days ago · 6 km deep · 73 km away
47. 2.369km S of Estacion Coahuila, B.C., MXSun, Sep 13, 6:36 PM PDT · 16445 days ago · 6 km deep · 95 km away
48. 2.910km W of Alberto Oviedo Mota, B.C., MXWed, Sep 16, 12:25 AM PDT · 16443 days ago · 6 km deep · 22 km away
49. 1.55km ENE of Westmorland, CAThu, Sep 17, 10:47 AM PDT · 16441 days ago · 11 km deep · 76 km away
50. 3.374km E of Maneadero, B.C., MXFri, Sep 18, 4:50 AM PDT · 16441 days ago · 6 km deep · 98 km away
51. 2.18km SW of Holtville, CAFri, Sep 18, 6:19 PM PDT · 16440 days ago · 10 km deep · 42 km away
52. 1.625km SSE of Ocotillo, CASat, Sep 19, 1:44 AM PDT · 16440 days ago · 4 km deep · 59 km away
53. 1.511km SW of Westmorland, CASat, Sep 19, 3:57 PM PDT · 16439 days ago · 10 km deep · 75 km away
54. 1.611km SW of Westmorland, CASat, Sep 19, 7:49 PM PDT · 16439 days ago · 8 km deep · 74 km away
55. 1.611km W of Calipatria, CATue, Sep 22, 10:16 PM PDT · 16436 days ago · 8 km deep · 88 km away
56. 1.523km SE of Ocotillo Wells, CAThu, Sep 24, 12:16 AM PDT · 16435 days ago · 10 km deep · 92 km away
57. 1.721km WSW of Westmorland, CAThu, Sep 24, 2:16 PM PDT · 16434 days ago · 8 km deep · 78 km away
58. 1.720km WSW of Westmorland, CAThu, Sep 24, 11:05 PM PDT · 16434 days ago · 5 km deep · 78 km away

Before

1. 1.56km NE of Estacion Coahuila, B.C., MXMon, Jul 27, 5:53 PM PDT · 16493 days ago · 6 km deep · 34 km away
2. 2.061km WSW of Alberto Oviedo Mota, B.C., MXSun, Jul 26, 9:38 AM PDT · 16495 days ago · 6 km deep · 69 km away
3. 2.011km SE of Puebla, B.C., MXSun, Jul 26, 7:28 AM PDT · 16495 days ago · 6 km deep · 8 km away
4. 1.59km NW of Ocotillo, CAThu, Jul 23, 12:35 PM PDT · 16497 days ago · 5 km deep · 86 km away
5. 1.55km S of Brawley, CATue, Jul 21, 2:10 AM PDT · 16500 days ago · 14 km deep · 64 km away
6. 1.78km NNW of Delta, B.C., MXSat, Jul 18, 3:42 PM PDT · 16502 days ago · 6 km deep · 3 km away
7. 1.513km W of Niland, CASat, Jul 18, 3:12 PM PDT · 16502 days ago · 5 km deep · 100 km away
8. 2.121km W of Westmorland, CASat, Jul 18, 9:10 AM PDT · 16503 days ago · 4 km deep · 86 km away
9. 2.316km W of Imperial, CAFri, Jul 17, 11:29 PM PDT · 16503 days ago · 14 km deep · 64 km away
10. 2.482km SSW of Alberto Oviedo Mota, B.C., MXThu, Jul 16, 10:58 PM PDT · 16504 days ago · 6 km deep · 99 km away
11. 2.016km W of Westmorland, CAThu, Jul 16, 9:10 AM PDT · 16505 days ago · 5 km deep · 83 km away
12. 1.622km WSW of Westmorland, CAWed, Jul 15, 10:18 PM PDT · 16505 days ago · 7 km deep · 78 km away
13. 1.713km WNW of Progreso, B.C., MXWed, Jul 15, 12:00 PM PDT · 16505 days ago · 12 km deep · 49 km away
14. 2.519km SW of Ocotillo, CATue, Jul 14, 11:49 AM PDT · 16506 days ago · 14 km deep · 84 km away
15. 1.62km SSW of Brawley, CATue, Jul 14, 6:44 AM PDT · 16507 days ago · 13 km deep · 66 km away
16. 1.66km NNE of Calipatria, CAMon, Jul 13, 4:30 PM PDT · 16507 days ago · 7 km deep · 88 km away
17. 1.79km E of Puebla, B.C., MXMon, Jul 13, 3:30 PM PDT · 16507 days ago · 6 km deep · 16 km away
18. 2.411km SSW of Puebla, B.C., MXMon, Jul 13, 12:07 AM PDT · 16508 days ago · 6 km deep · 16 km away
19. 2.013km SSW of Puebla, B.C., MXSun, Jul 12, 11:31 PM PDT · 16508 days ago · 6 km deep · 15 km away
20. 1.92km SSW of Brawley, CASun, Jul 12, 4:08 PM PDT · 16508 days ago · 15 km deep · 66 km away

From the USGS Earthquake Hazards Program and its partner networks, event ci520180. Read Wed, Sep 23, 2026, 4:23 AM UTC.