M1.7 earthquake 12km W of Morongo Valley, CA

Magnitude

1.7 (Mc), micro

Magnitude from

Southern California Seismic Network

Local time

Wed, Sep 28, 1983, 2:58 PM PDT

UTC

1983-09-28 21:58:48 UTC

Depth

13.4 km (8.3 mi), shallow

Epicenter

34.039° N, 116.714° W

Region

California

Tsunami flag

No

Status

Reviewed by a seismologist

Depth from

From location

Station coverage gap

129°

Stations used

0

• Morongo Valley, CaliforniaPopulation 3,552. Forecast12 kmW
• Banning, CaliforniaPopulation 30,945. Forecast20 kmNE
• Moreno Valley, CaliforniaPopulation 204,198. Forecast49 kmENE
• Los Angeles, CaliforniaPopulation 3,820,914. Forecast141 kmE

After

1. 1.814km NNE of Borrego Springs, CAThu, Sep 29, 12:56 AM PDT · 15710 days ago · 10 km deep · 84 km away
2. 2.11km SSE of Anza, CAThu, Sep 29, 3:04 PM PDT · 15709 days ago · 8 km deep · 55 km away
3. 2.38km N of Rancho Cucamonga, CAThu, Sep 29, 4:24 PM PDT · 15709 days ago · 5 km deep · 83 km away
4. 1.614km NNE of Borrego Springs, CAFri, Sep 30, 12:39 AM PDT · 15709 days ago · 10 km deep · 84 km away
5. 1.91km ENE of Anza, CAFri, Sep 30, 1:47 AM PDT · 15709 days ago · 11 km deep · 53 km away
6. 1.92km N of Moreno Valley, CAFri, Sep 30, 2:07 AM PDT · 15708 days ago · 14 km deep · 48 km away
7. 2.56km WNW of Aguanga, CASat, Oct 1, 12:31 AM PDT · 15708 days ago · 11 km deep · 67 km away
8. 1.61km NW of Loma Linda, CASat, Oct 1, 3:25 PM PDT · 15707 days ago · 14 km deep · 51 km away
9. 1.86km W of Muscoy, CASat, Oct 1, 5:30 PM PDT · 15707 days ago · 5 km deep · 65 km away
10. 1.63km SE of Highland, CASat, Oct 1, 7:55 PM PDT · 15707 days ago · 6 km deep · 45 km away
11. 1.910km S of Idyllwild, CASun, Oct 2, 6:23 AM PDT · 15706 days ago · 11 km deep · 43 km away
12. 1.51km ESE of Loma Linda, CASun, Oct 2, 7:17 PM PDT · 15706 days ago · 14 km deep · 50 km away
13. 1.53km WNW of Cabazon, CASun, Oct 2, 7:58 PM PDT · 15706 days ago · 8 km deep · 16 km away
14. 1.72km W of Borrego Springs, CASun, Oct 2, 11:12 PM PDT · 15706 days ago · 3 km deep · 92 km away
15. 1.87km S of Morongo Valley, CAMon, Oct 3, 12:22 AM PDT · 15706 days ago · 8 km deep · 14 km away
16. 2.55km S of Chino Hills, CAMon, Oct 3, 3:39 AM PDT · 15705 days ago · 11 km deep · 96 km away
17. 2.25km S of Chino Hills, CAMon, Oct 3, 3:41 AM PDT · 15705 days ago · 12 km deep · 97 km away
18. 1.74km S of Chino Hills, CAMon, Oct 3, 3:45 AM PDT · 15705 days ago · 5 km deep · 96 km away
19. 1.52km S of Banning, CAMon, Oct 3, 3:54 AM PDT · 15705 days ago · 11 km deep · 21 km away
20. 1.612km WNW of Garnet, CAMon, Oct 3, 3:16 PM PDT · 15705 days ago · 14 km deep · 13 km away
21. 1.915km N of Yucca Valley, CAMon, Oct 3, 8:31 PM PDT · 15705 days ago · 5 km deep · 34 km away
22. 2.825km NNW of Yucca Valley, CATue, Oct 4, 10:01 AM PDT · 15704 days ago · 1 km deep · 37 km away
23. 1.56km S of Lake Henshaw, CATue, Oct 4, 12:03 PM PDT · 15704 days ago · 10 km deep · 94 km away
24. 2.212km NW of Morongo Valley, CATue, Oct 4, 2:28 PM PDT · 15704 days ago · 9 km deep · 8 km away
25. 1.98km NE of Desert Hot Springs, CATue, Oct 4, 7:39 PM PDT · 15704 days ago · 12 km deep · 24 km away
26. 1.97km E of Running Springs, CAWed, Oct 5, 3:35 AM PDT · 15703 days ago · 10 km deep · 35 km away
27. 2.522km ESE of Anza, CAWed, Oct 5, 11:32 AM PDT · 15703 days ago · 10 km deep · 66 km away
28. 2.26km SW of Beaumont, CAWed, Oct 5, 4:33 PM PDT · 15703 days ago · 13 km deep · 33 km away
29. 1.78km SE of Valle Vista, CAWed, Oct 5, 5:06 PM PDT · 15703 days ago · 16 km deep · 38 km away
30. 2.138km ENE of Lucerne Valley, CAWed, Oct 5, 10:07 PM PDT · 15703 days ago · -1 km deep · 56 km away
31. 1.616km ESE of Big Bear City, CAThu, Oct 6, 5:17 AM PDT · 15702 days ago · 4 km deep · 21 km away
32. 1.74km E of Palomar Observatory, CAThu, Oct 6, 6:02 AM PDT · 15702 days ago · 3 km deep · 77 km away
33. 1.813km SW of Borrego Springs, CAThu, Oct 6, 6:03 AM PDT · 15702 days ago · 12 km deep · 100 km away
34. 1.86km SE of Loma Linda, CAThu, Oct 6, 7:46 AM PDT · 15702 days ago · 12 km deep · 47 km away
35. 2.02km SSE of Loma Linda, CAThu, Oct 6, 1:04 PM PDT · 15702 days ago · 18 km deep · 50 km away
36. 2.06km ESE of Morongo Valley, CAThu, Oct 6, 7:09 PM PDT · 15702 days ago · 9 km deep · 18 km away
37. 1.97km N of Big Bear City, CAThu, Oct 6, 7:22 PM PDT · 15702 days ago · 5 km deep · 34 km away
38. 2.42km SE of Loma Linda, CAThu, Oct 6, 10:07 PM PDT · 15702 days ago · 17 km deep · 49 km away
39. 2.026km NNW of Yucca Valley, CAFri, Oct 7, 1:33 AM PDT · 15702 days ago · 0 km deep · 38 km away
40. 2.05km SE of Loma Linda, CAFri, Oct 7, 3:04 AM PDT · 15701 days ago · 11 km deep · 47 km away
41. 3.15km NNE of Beaumont, CAFri, Oct 7, 3:40 AM PDT · 15701 days ago · 15 km deep · 24 km away
42. 1.85km NNE of Beaumont, CAFri, Oct 7, 3:41 AM PDT · 15701 days ago · 17 km deep · 24 km away
43. 1.82km W of Loma Linda, CAFri, Oct 7, 5:35 AM PDT · 15701 days ago · 15 km deep · 53 km away
44. 2.02km ESE of Loma Linda, CAFri, Oct 7, 3:52 PM PDT · 15701 days ago · 15 km deep · 49 km away
45. 1.77km SE of Loma Linda, CASat, Oct 8, 3:09 AM PDT · 15700 days ago · 11 km deep · 47 km away
46. 1.87km W of Anza, CASat, Oct 8, 3:12 AM PDT · 15700 days ago · 3 km deep · 54 km away
47. 2.12km SE of Loma Linda, CASat, Oct 8, 7:00 AM PDT · 15700 days ago · 17 km deep · 49 km away
48. 1.922km ESE of Anza, CASat, Oct 8, 2:03 PM PDT · 15700 days ago · 11 km deep · 66 km away
49. 2.18km S of Idyllwild, CASat, Oct 8, 2:48 PM PDT · 15700 days ago · 14 km deep · 42 km away
50. 1.618km NNE of Joshua Tree, CASun, Oct 9, 12:32 AM PDT · 15700 days ago · 11 km deep · 52 km away
51. 1.523km SSE of Twentynine Palms, CASun, Oct 9, 1:32 AM PDT · 15700 days ago · 1 km deep · 69 km away
52. 2.017km WSW of Oasis, CASun, Oct 9, 4:48 AM PDT · 15699 days ago · 10 km deep · 84 km away
53. 2.47km NE of Nuevo, CASun, Oct 9, 12:06 PM PDT · 15699 days ago · 11 km deep · 41 km away
54. 2.025km NNW of Yucca Valley, CASun, Oct 9, 2:31 PM PDT · 15699 days ago · 1 km deep · 38 km away
55. 1.810km NNE of Aguanga, CAMon, Oct 10, 1:23 AM PDT · 15699 days ago · 2 km deep · 58 km away
56. 1.92km SSW of Ontario, CAMon, Oct 10, 1:26 AM PDT · 15699 days ago · 12 km deep · 85 km away
57. 1.77km N of Moreno Valley, CAMon, Oct 10, 2:17 AM PDT · 15698 days ago · 15 km deep · 47 km away
58. 2.012km S of Joshua Tree, CAMon, Oct 10, 5:45 AM PDT · 15698 days ago · 3 km deep · 35 km away
59. 1.531km WNW of Desert Center, CAMon, Oct 10, 2:23 PM PDT · 15698 days ago · 11 km deep · 96 km away
60. 1.83km W of Borrego Springs, CATue, Oct 11, 6:21 AM PDT · 15697 days ago · 3 km deep · 92 km away

The first 60 of 176.

Before

1. 1.52km S of Loma Linda, CAWed, Sep 28, 12:11 PM PDT · 15710 days ago · 17 km deep · 51 km away
2. 1.922km SE of Anza, CAWed, Sep 28, 7:10 AM PDT · 15710 days ago · 13 km deep · 70 km away
3. 1.66km E of Running Springs, CAWed, Sep 28, 3:55 AM PDT · 15710 days ago · 1 km deep · 37 km away
4. 1.72km NNE of Anza, CATue, Sep 27, 11:46 PM PDT · 15711 days ago · 10 km deep · 52 km away
5. 2.49km SE of Running Springs, CATue, Sep 27, 12:44 PM PDT · 15711 days ago · 12 km deep · 33 km away
6. 2.46km NW of Rialto, CATue, Sep 27, 8:17 AM PDT · 15711 days ago · 13 km deep · 66 km away
7. 1.630km WNW of Desert Center, CATue, Sep 27, 2:46 AM PDT · 15711 days ago · 13 km deep · 96 km away
8. 1.68km NNW of Cabazon, CATue, Sep 27, 1:34 AM PDT · 15712 days ago · 11 km deep · 12 km away
9. 2.22km NNW of Colton, CAMon, Sep 26, 7:44 AM PDT · 15712 days ago · 5 km deep · 57 km away
10. 1.92km N of Colton, CAMon, Sep 26, 7:11 AM PDT · 15712 days ago · 7 km deep · 56 km away
11. 2.37km NE of Nuevo, CAMon, Sep 26, 6:59 AM PDT · 15712 days ago · 13 km deep · 41 km away
12. 1.81km NNW of Valle Vista, CAMon, Sep 26, 5:58 AM PDT · 15712 days ago · 12 km deep · 35 km away
13. 2.22km NNW of Colton, CAMon, Sep 26, 4:50 AM PDT · 15712 days ago · 8 km deep · 56 km away
14. 1.92km NNW of Colton, CAMon, Sep 26, 1:30 AM PDT · 15713 days ago · 5 km deep · 56 km away
15. 1.93km NNW of Colton, CAMon, Sep 26, 12:26 AM PDT · 15713 days ago · 4 km deep · 56 km away
16. 1.82km SSE of Redlands, CASun, Sep 25, 10:21 PM PDT · 15713 days ago · 4 km deep · 42 km away
17. 1.68km WNW of Idyllwild, CASun, Sep 25, 7:25 PM PDT · 15713 days ago · 12 km deep · 30 km away
18. 1.93km E of Colton, CASun, Sep 25, 7:20 PM PDT · 15713 days ago · 13 km deep · 52 km away
19. 2.02km ESE of Redlands, CASat, Sep 24, 11:16 AM PDT · 15714 days ago · 11 km deep · 42 km away
20. 2.15km WNW of Mira Loma, CASat, Sep 24, 4:33 AM PDT · 15714 days ago · 3 km deep · 79 km away

From the USGS Earthquake Hazards Program and its partner networks, event ci16072. Read Fri, Oct 2, 2026, 8:19 PM UTC.