M1.9 earthquake 6km N of Somerton, AZ

Magnitude

1.9 (ML, local (Richter)), micro

Magnitude from

Southern California Seismic Network

Local time

Fri, Jul 4, 2003, 12:00 AM MST

UTC

2003-07-04 07:00:17 UTC

Depth

13.7 km (8.5 mi), shallow

Epicenter

32.651° N, 114.701° W

Region

Arizona

Tsunami flag

No

Status

Reviewed by a seismologist

Location uncertainty

About 1.5 km horizontally, 2.5 km in depth

Magnitude uncertainty

±0.26

Depth from

From location

Station coverage gap

143°

Stations used

6

• Somerton, ArizonaPopulation 15,048. Forecast6 kmN
• San Luis Río Colorado, MexicoPopulation 176,685. Forecast23 kmNNE
• Mexicali, MexicoPopulation 1,032,686. Forecast71 kmE

After

1. 2.08km WSW of Holtville, CASun, Jul 6, 4:02 AM PDT · 8492 days ago · 16 km deep · 73 km away
2. 1.78km WSW of Holtville, CASun, Jul 6, 4:07 AM PDT · 8492 days ago · 16 km deep · 72 km away
3. 1.58km W of Holtville, CaliforniaSun, Jul 6, 2:56 PM PDT · 8492 days ago · 17 km deep · 74 km away
4. 2.110km WNW of Delta, B.C., MXMon, Jul 7, 12:47 AM PDT · 8491 days ago · 7 km deep · 63 km away
5. 1.910km WNW of Delta, B.C., MXMon, Jul 7, 12:58 AM PDT · 8491 days ago · 7 km deep · 63 km away
6. 1.74km SE of Delta, B.C., MXMon, Jul 7, 6:21 PM PDT · 8491 days ago · 7 km deep · 56 km away
7. 1.56km WSW of Holtville, CaliforniaMon, Jul 7, 7:59 PM PDT · 8491 days ago · 12 km deep · 71 km away
8. 2.416km WSW of Alberto Oviedo Mota, B.C., MXWed, Jul 9, 5:03 AM PDT · 8489 days ago · 7 km deep · 79 km away
9. 1.814km WSW of Delta, B.C., MXWed, Jul 9, 2:11 PM PDT · 8489 days ago · 7 km deep · 70 km away
10. 1.87km S of Brawley, CAThu, Jul 10, 8:57 PM PDT · 8487 days ago · 15 km deep · 83 km away
11. 1.55km E of Heber, CaliforniaFri, Jul 11, 6:39 PM PDT · 8487 days ago · 5 km deep · 73 km away
12. 2.14km NE of Calexico, CAFri, Jul 11, 9:43 PM PDT · 8486 days ago · 5 km deep · 72 km away
13. 2.34km E of Heber, CAFri, Jul 11, 9:45 PM PDT · 8486 days ago · 5 km deep · 74 km away
14. 1.55km ENE of Calexico, CaliforniaFri, Jul 11, 10:20 PM PDT · 8486 days ago · 6 km deep · 71 km away
15. 2.315km SE of Progreso, B.C., MXSat, Jul 12, 12:18 AM PDT · 8486 days ago · 7 km deep · 75 km away
16. 1.75km NE of Calexico, CaliforniaSat, Jul 12, 3:07 AM PDT · 8486 days ago · 5 km deep · 72 km away
17. 2.315km NNE of Estacion Coahuila, B.C., MXSun, Jul 13, 10:39 AM PDT · 8485 days ago · 7 km deep · 44 km away
18. 1.812km ESE of Puebla, B.C., MXSun, Jul 13, 5:18 PM PDT · 8485 days ago · 7 km deep · 53 km away
19. 1.87km NNE of Westmorland, CAWed, Jul 16, 6:37 AM PDT · 8482 days ago · 14 km deep · 98 km away
20. 2.17km N of Westmorland, CAWed, Jul 16, 8:42 AM PDT · 8482 days ago · 14 km deep · 98 km away
21. 2.114km ESE of Puebla, B.C., MXSat, Jul 19, 3:26 AM PDT · 8479 days ago · 7 km deep · 50 km away
22. 3.06km W of Alberto Oviedo Mota, B.C., MXMon, Jul 21, 12:21 PM PDT · 8477 days ago · 6 km deep · 69 km away
23. 2.18km ENE of El Centro, CASat, Jul 26, 6:26 AM PDT · 8472 days ago · 16 km deep · 74 km away
24. 2.88km NW of Alberto Oviedo Mota, B.C., MXTue, Jul 29, 11:33 AM PDT · 8469 days ago · 6 km deep · 64 km away
25. 2.219km SSE of Progreso, B.C., MXWed, Jul 30, 5:48 PM PDT · 8468 days ago · 7 km deep · 78 km away
26. 1.929km SW of Alberto Oviedo Mota, B.C., MXSat, Aug 2, 4:34 AM PDT · 8465 days ago · 7 km deep · 93 km away
27. 1.910km SE of Puebla, B.C., MXSat, Aug 2, 3:13 PM PDT · 8465 days ago · 7 km deep · 56 km away
28. 1.65km S of Brawley, CaliforniaSun, Aug 3, 4:43 PM PDT · 8464 days ago · 14 km deep · 83 km away
29. 1.86km WSW of Imperial, CASun, Aug 10, 7:32 AM PDT · 8457 days ago · 15 km deep · 89 km away
30. 1.68km SW of Holtville, CaliforniaMon, Aug 11, 7:40 PM PDT · 8456 days ago · 16 km deep · 69 km away
31. 1.732km S of Progreso, B.C., MXTue, Aug 12, 12:15 PM PDT · 8455 days ago · 7 km deep · 93 km away
32. 2.47km SW of Holtville, CATue, Aug 12, 5:35 PM PDT · 8455 days ago · 21 km deep · 70 km away
33. 1.910km SSW of Holtville, CATue, Aug 12, 10:06 PM PDT · 8454 days ago · 19 km deep · 67 km away
34. 2.27km WSW of Holtville, CATue, Aug 12, 11:45 PM PDT · 8454 days ago · 14 km deep · 71 km away
35. 2.46km WSW of Holtville, CAWed, Aug 13, 12:40 AM PDT · 8454 days ago · 14 km deep · 71 km away
36. 1.76km WSW of Holtville, CAWed, Aug 13, 12:41 AM PDT · 8454 days ago · 13 km deep · 71 km away
37. 1.912km SSE of Progreso, B.C., MXSat, Aug 16, 7:21 AM PDT · 8451 days ago · 6 km deep · 79 km away
38. 2.04km SSW of Brawley, CASun, Aug 17, 7:41 PM PDT · 8450 days ago · 15 km deep · 86 km away
39. 1.63km ENE of Heber, CASun, Aug 17, 8:44 PM PDT · 8449 days ago · 14 km deep · 75 km away
40. 2.04km WSW of Brawley, CAFri, Aug 22, 8:11 AM PDT · 8445 days ago · 13 km deep · 89 km away
41. 1.89km NNE of Delta, B.C., MXFri, Aug 22, 5:34 PM PDT · 8445 days ago · 7 km deep · 48 km away
42. 2.210km WNW of Alberto Oviedo Mota, B.C., MXSun, Aug 24, 9:58 AM PDT · 8443 days ago · 7 km deep · 70 km away
43. 1.55km NW of Puebla, B.C., MXSun, Aug 24, 10:41 PM PDT · 8442 days ago · 7 km deep · 66 km away
44. 1.74km NE of Mexicali, B.C., MXSun, Aug 24, 10:51 PM PDT · 8442 days ago · 25 km deep · 69 km away
45. 1.59km SSW of Holtville, CaliforniaWed, Aug 27, 6:06 AM PDT · 8440 days ago · 16 km deep · 68 km away
46. 1.75km SSW of Brawley, CAThu, Aug 28, 7:39 PM PDT · 8439 days ago · 15 km deep · 85 km away
47. 1.612km WSW of Progreso, B.C., MXSat, Aug 30, 3:20 AM PDT · 8437 days ago · 5 km deep · 95 km away

Before

1. 1.94km SSW of Imperial, CATue, Jul 1, 8:13 AM PDT · 8497 days ago · 15 km deep · 85 km away
2. 2.04km SSW of Imperial, CAMon, Jun 30, 1:46 AM PDT · 8498 days ago · 15 km deep · 85 km away
3. 2.58km SW of Delta, B.C., MXSun, Jun 29, 5:35 AM PDT · 8499 days ago · 7 km deep · 64 km away
4. 2.52km NNW of Delta, B.C., MXSat, Jun 28, 11:43 AM PDT · 8500 days ago · 7 km deep · 56 km away
5. 1.66km W of Holtville, CAWed, Jun 25, 10:38 PM PDT · 8502 days ago · 11 km deep · 72 km away
6. 1.78km NE of Imperial, CaliforniaWed, Jun 18, 10:36 PM PDT · 8509 days ago · 14 km deep · 80 km away
7. 1.56km E of Westmorland, CaliforniaWed, Jun 18, 9:40 PM PDT · 8509 days ago · 16 km deep · 91 km away
8. 1.98km E of Puebla, B.C., MXMon, Jun 16, 1:38 PM PDT · 8512 days ago · 7 km deep · 53 km away
9. 2.654km ESE of Estacion Coahuila, B.C., MXSun, Jun 15, 2:25 AM GMT-7 · 8513 days ago · 7 km deep · 77 km away
10. 2.17km SW of Delta, B.C., MXFri, Jun 13, 3:31 AM PDT · 8515 days ago · 7 km deep · 63 km away
11. 1.85km WSW of Brawley, CaliforniaThu, Jun 12, 10:20 PM PDT · 8515 days ago · 14 km deep · 89 km away
12. 1.93km WSW of Brawley, CAWed, Jun 11, 9:28 PM PDT · 8516 days ago · 16 km deep · 87 km away
13. 2.62km SW of Brawley, CAWed, Jun 11, 9:08 PM PDT · 8516 days ago · 15 km deep · 87 km away
14. 2.54km SW of Brawley, CAWed, Jun 11, 9:02 PM PDT · 8516 days ago · 17 km deep · 87 km away
15. 2.03km WSW of Brawley, CAWed, Jun 11, 8:57 PM PDT · 8516 days ago · 13 km deep · 88 km away
16. 2.43km SW of Brawley, CAWed, Jun 11, 8:56 PM PDT · 8516 days ago · 15 km deep · 86 km away
17. 1.54km WSW of Brawley, CaliforniaWed, Jun 11, 8:55 PM PDT · 8516 days ago · 6 km deep · 88 km away
18. 3.43km SW of Brawley, CAWed, Jun 11, 8:54 PM PDT · 8516 days ago · 16 km deep · 86 km away
19. 3.64km SW of Brawley, CAWed, Jun 11, 8:53 PM PDT · 8516 days ago · 17 km deep · 86 km away
20. 3.546km SE of Estacion Coahuila, B.C., MXWed, Jun 11, 2:13 PM PDT · 8517 days ago · 6 km deep · 83 km away

From the USGS Earthquake Hazards Program and its partner networks, event ci9928045. Read Mon, Oct 5, 2026, 2:41 PM UTC.