M2.5 earthquake 10km SW of Morongo Valley, CA

Magnitude

2.5 (ml), micro

Local time

Sun, Apr 16, 1978, 11:36 PM PST

UTC

1978-04-17 07:36:18 UTC

Depth

8.7 km (5.4 mi), shallow

Epicenter

33.987° N, 116.661° W

Region

California

Tsunami flag

No

Status

Reviewed by a seismologist

Location uncertainty

About 0.4 km horizontally, 1.2 km in depth

Magnitude uncertainty

±0.25

Depth from

From location

Station coverage gap

72°

Stations used

34

• Morongo Valley, CaliforniaPopulation 3,552. Forecast10 kmSW
• Desert Hot Springs, CaliforniaPopulation 28,335. Forecast15 kmW
• Moreno Valley, CaliforniaPopulation 204,198. Forecast53 kmE
• Los Angeles, CaliforniaPopulation 3,820,914. Forecast146 kmE

After

1. 1.716km WNW of Morongo Valley, CAWed, May 10, 5:43 AM PDT · 17667 days ago · 9 km deep · 14 km away
2. 1.75km N of Cabazon, CAWed, May 10, 8:58 AM PDT · 17667 days ago · 12 km deep · 12 km away
3. 1.94km NNE of Lytle Creek, CAWed, May 10, 1:33 PM PDT · 17667 days ago · 13 km deep · 84 km away
4. 1.738km SW of Ludlow, CAWed, May 10, 6:40 PM PDT · 17667 days ago · 0 km deep · 59 km away
5. 1.711km NNE of Cabazon, CAThu, May 11, 1:53 AM PDT · 17666 days ago · 16 km deep · 7 km away
6. 1.610km ENE of Desert Hot Springs, CAThu, May 11, 2:35 AM PDT · 17666 days ago · 6 km deep · 23 km away
7. 2.14km SW of Big Bear Lake, CAThu, May 11, 7:59 AM PDT · 17666 days ago · 4 km deep · 36 km away
8. 2.011km SE of Anza, CAThu, May 11, 9:26 AM PDT · 17666 days ago · 8 km deep · 57 km away
9. 1.72km NNE of Loma Linda, CAThu, May 11, 1:46 PM PDT · 17666 days ago · 13 km deep · 56 km away
10. 1.84km SW of Big Bear Lake, CAThu, May 11, 10:00 PM PDT · 17666 days ago · 7 km deep · 36 km away
11. 1.911km SE of Anza, CAFri, May 12, 6:31 AM PDT · 17665 days ago · 9 km deep · 57 km away
12. 2.823km SSW of La Quinta, CAFri, May 12, 8:49 AM PDT · 17665 days ago · 14 km deep · 60 km away
13. 1.710km S of Banning, CAFri, May 12, 7:11 PM PDT · 17665 days ago · 18 km deep · 24 km away
14. 1.87km NE of Banning, CAFri, May 12, 7:45 PM PDT · 17665 days ago · 13 km deep · 16 km away
15. 2.339km SW of Ludlow, CASat, May 13, 3:41 AM PDT · 17664 days ago · 3 km deep · 60 km away
16. 1.57km WNW of Twentynine Palms, CASat, May 13, 5:15 AM PDT · 17664 days ago · 9 km deep · 52 km away
17. 1.96km NE of Cabazon, CASat, May 13, 10:50 PM PDT · 17664 days ago · 15 km deep · 9 km away
18. 1.66km ENE of Cabazon, CASat, May 13, 10:50 PM PDT · 17664 days ago · 17 km deep · 8 km away
19. 2.110km SSE of Yucca Valley, CASun, May 14, 1:32 AM PDT · 17663 days ago · 5 km deep · 25 km away
20. 2.711km ENE of Thermal, CASun, May 14, 5:23 AM PDT · 17663 days ago · 4 km deep · 67 km away
21. 1.54km ESE of Cabazon, CASun, May 14, 9:19 AM PDT · 17663 days ago · 19 km deep · 12 km away
22. 1.73km ESE of Loma Linda, CASun, May 14, 12:49 PM PDT · 17663 days ago · 14 km deep · 53 km away
23. 1.923km SSW of La Quinta, CASun, May 14, 2:00 PM PDT · 17663 days ago · 13 km deep · 60 km away
24. 1.621km SSW of La Quinta, CASun, May 14, 2:01 PM PDT · 17663 days ago · 13 km deep · 59 km away
25. 1.922km SSW of La Quinta, CASun, May 14, 3:53 PM PDT · 17663 days ago · 13 km deep · 59 km away
26. 1.71km N of Cabazon, CASun, May 14, 8:27 PM PDT · 17663 days ago · 10 km deep · 14 km away
27. 1.94km ENE of Colton, CASun, May 14, 10:48 PM PDT · 17663 days ago · 14 km deep · 58 km away
28. 1.75km SW of Palomar Observatory, CAMon, May 15, 2:07 AM PDT · 17662 days ago · 19 km deep · 77 km away
29. 1.940km SW of Ludlow, CAMon, May 15, 9:58 AM PDT · 17662 days ago · 2 km deep · 59 km away
30. 1.76km SSW of Anza, CAMon, May 15, 2:14 PM PDT · 17662 days ago · 13 km deep · 54 km away
31. 1.67km SSW of Anza, CAMon, May 15, 2:35 PM PDT · 17662 days ago · 12 km deep · 54 km away
32. 1.74km SSW of Big Bear Lake, CAMon, May 15, 10:31 PM PDT · 17662 days ago · 6 km deep · 36 km away
33. 1.78km NW of Warner Springs, CATue, May 16, 2:14 AM PDT · 17661 days ago · 11 km deep · 72 km away
34. 1.920km NNW of Borrego Springs, CATue, May 16, 4:01 AM PDT · 17661 days ago · 11 km deep · 65 km away
35. 2.04km NNE of Running Springs, CATue, May 16, 2:33 PM PDT · 17661 days ago · 3 km deep · 49 km away
36. 1.95km S of Morongo Valley, CATue, May 16, 2:35 PM PDT · 17661 days ago · 10 km deep · 7 km away
37. 1.94km NNE of Running Springs, CATue, May 16, 6:48 PM PDT · 17661 days ago · 3 km deep · 49 km away
38. 1.612km WNW of Garnet, CAWed, May 17, 11:56 PM PDT · 17660 days ago · 13 km deep · 4 km away
39. 1.75km NE of North Shore, CAThu, May 18, 9:15 AM PDT · 17659 days ago · 13 km deep · 86 km away
40. 1.95km NE of North Shore, CAThu, May 18, 9:16 AM PDT · 17659 days ago · 7 km deep · 85 km away
41. 1.88km WSW of Anza, CAThu, May 18, 10:57 AM PDT · 17659 days ago · 8 km deep · 52 km away
42. 1.97km SW of Big Bear Lake, CAThu, May 18, 5:27 PM PDT · 17659 days ago · 8 km deep · 36 km away
43. 1.824km NNW of Borrego Springs, CAFri, May 19, 3:00 AM PDT · 17658 days ago · 7 km deep · 62 km away
44. 1.98km N of Banning, CAFri, May 19, 5:17 PM PDT · 17658 days ago · 14 km deep · 20 km away
45. 1.85km SW of Big Bear Lake, CAFri, May 19, 6:53 PM PDT · 17658 days ago · 7 km deep · 37 km away
46. 2.118km NE of Coachella, CAFri, May 19, 7:18 PM PDT · 17658 days ago · 1 km deep · 63 km away
47. 1.718km SSE of Joshua Tree, CAFri, May 19, 9:33 PM PDT · 17658 days ago · 0 km deep · 38 km away
48. 1.61km N of Cabazon, CASat, May 20, 11:50 AM PDT · 17657 days ago · 12 km deep · 13 km away
49. 2.15km WNW of Mira Loma, CASat, May 20, 1:35 PM PDT · 17657 days ago · 9 km deep · 84 km away
50. 2.22km NNW of Fontana, CASat, May 20, 2:29 PM PDT · 17657 days ago · 5 km deep · 76 km away
51. 1.714km NNE of Banning, CASat, May 20, 3:22 PM PDT · 17657 days ago · 13 km deep · 18 km away
52. 2.28km N of Borrego Springs, CASat, May 20, 4:23 PM PDT · 17657 days ago · 14 km deep · 77 km away
53. 1.620km ESE of Anza, CASat, May 20, 4:35 PM PDT · 17657 days ago · 11 km deep · 59 km away
54. 1.814km S of Borrego Springs, CASat, May 20, 9:35 PM PDT · 17657 days ago · 6 km deep · 99 km away
55. 1.89km N of Borrego Springs, CASat, May 20, 9:52 PM PDT · 17657 days ago · 12 km deep · 77 km away
56. 1.99km N of Borrego Springs, CASat, May 20, 9:54 PM PDT · 17657 days ago · 12 km deep · 77 km away
57. 1.83km ENE of Hemet, CASun, May 21, 12:46 AM PDT · 17657 days ago · 13 km deep · 37 km away
58. 1.54km S of Mentone, CASun, May 21, 3:22 PM PDT · 17656 days ago · 5 km deep · 44 km away
59. 1.915km ESE of Anza, CASun, May 21, 10:07 PM PDT · 17656 days ago · 13 km deep · 55 km away
60. 1.810km NNE of Julian, CASun, May 21, 10:13 PM PDT · 17656 days ago · 16 km deep · 93 km away

The first 60 of 169.

From the USGS Earthquake Hazards Program and its partner networks, event ci3338921. Read Tue, Sep 22, 2026, 7:51 PM UTC.