M4.3 earthquake 40km WNW of Ludlow, CA

Magnitude

4.3 (ml), light

Local time

Sun, Aug 1, 1976, 10:18 AM PDT

UTC

1976-08-01 17:18:47 UTC

Depth

1.8 km (1.1 mi), shallow

Epicenter

34.896° N, 116.549° W

Region

California

Tsunami flag

No

Status

Reviewed by a seismologist

Depth from

From location

Station coverage gap

157°

Stations used

0

• Yermo, CaliforniaPopulation 623. Forecast25 kmE
• Barstow, CaliforniaPopulation 23,692. Forecast43 kmE
• Victorville, CaliforniaPopulation 122,225. Forecast79 kmENE
• Los Angeles, CaliforniaPopulation 3,820,914. Forecast182 kmENE

After

1. 2.041km WNW of Ludlow, CASun, Aug 1, 10:49 AM PDT · 18321 days ago · 6 km deep · 0 km away
2. 1.940km WNW of Ludlow, CASun, Aug 1, 11:45 AM PDT · 18321 days ago · 6 km deep · 1 km away
3. 1.612km WNW of Morongo Valley, CASun, Aug 1, 2:23 PM PDT · 18321 days ago · 13 km deep · 93 km away
4. 1.714km E of Lucerne Valley, CAThu, Aug 5, 4:17 PM PDT · 18317 days ago · 3 km deep · 55 km away
5. 1.58km S of Yucca Valley, CAThu, Aug 5, 10:43 PM PDT · 18317 days ago · 3 km deep · 96 km away
6. 2.312km N of Barstow, CASat, Aug 7, 4:07 AM PDT · 18315 days ago · 6 km deep · 46 km away
7. 2.313km N of Barstow, CASat, Aug 7, 9:29 AM PDT · 18315 days ago · 6 km deep · 47 km away
8. 1.519km NE of Lucerne Valley, CASun, Aug 8, 4:24 AM PDT · 18314 days ago · 6 km deep · 44 km away
9. 1.516km N of Joshua Tree, CAMon, Aug 9, 8:11 PM PDT · 18313 days ago · 4 km deep · 71 km away
10. 1.74km NE of Running Springs, CATue, Aug 10, 5:21 AM PDT · 18312 days ago · 2 km deep · 88 km away
11. 3.116km NW of Yucca Valley, CAWed, Aug 11, 8:00 PM PDT · 18311 days ago · 6 km deep · 76 km away
12. 1.717km NNW of Yucca Valley, CAThu, Aug 12, 7:03 PM PDT · 18310 days ago · 1 km deep · 71 km away
13. 1.710km S of Joshua Tree, CAThu, Aug 12, 9:33 PM PDT · 18310 days ago · 1 km deep · 96 km away
14. 2.37km NE of Lake Arrowhead, CASat, Aug 14, 9:34 PM PDT · 18308 days ago · 5 km deep · 86 km away
15. 1.713km ENE of Lucerne Valley, CATue, Aug 17, 11:19 AM PDT · 18305 days ago · 2 km deep · 54 km away
16. 1.910km ENE of Desert Hot Springs, CAThu, Aug 19, 1:52 AM PDT · 18303 days ago · 1 km deep · 100 km away
17. 2.715km NE of Lake Arrowhead, CAThu, Aug 19, 1:44 PM PDT · 18303 days ago · 3 km deep · 78 km away
18. 3.214km SW of Lucerne Valley, CAThu, Aug 19, 1:44 PM PDT · 18303 days ago · 3 km deep · 77 km away
19. 2.413km SW of Lucerne Valley, CAThu, Aug 19, 2:24 PM PDT · 18303 days ago · 3 km deep · 76 km away
20. 2.214km SW of Lucerne Valley, CAThu, Aug 19, 6:13 PM PDT · 18303 days ago · 5 km deep · 77 km away
21. 2.315km NE of Lake Arrowhead, CAFri, Aug 20, 9:20 AM PDT · 18302 days ago · 2 km deep · 78 km away
22. 2.313km SW of Lucerne Valley, CASat, Aug 21, 12:02 AM PDT · 18302 days ago · 6 km deep · 76 km away
23. 2.614km SW of Lucerne Valley, CASat, Aug 21, 12:03 AM PDT · 18302 days ago · 2 km deep · 77 km away
24. 2.521km ENE of Barstow, CAWed, Aug 25, 3:51 AM PDT · 18297 days ago · 6 km deep · 26 km away
25. 2.339km NNW of Fort Irwin, CAWed, Aug 25, 3:36 PM PDT · 18297 days ago · 6 km deep · 82 km away
26. 2.212km ENE of Barstow, CAFri, Aug 27, 3:55 AM PDT · 18295 days ago · 3 km deep · 32 km away
27. 2.026km ENE of Big Bear City, CAFri, Aug 27, 10:25 PM PDT · 18295 days ago · 1 km deep · 62 km away
28. 2.119km SSW of Amboy, CASat, Aug 28, 11:55 AM PDT · 18294 days ago · 4 km deep · 85 km away
29. 2.00km NW of Lake Arrowhead, CASun, Aug 29, 4:55 AM PDT · 18293 days ago · 4 km deep · 93 km away
30. 2.224km ENE of Big Bear City, CAMon, Aug 30, 11:16 AM PDT · 18292 days ago · 1 km deep · 60 km away
31. 2.025km ENE of Big Bear City, CAMon, Aug 30, 11:27 AM PDT · 18292 days ago · 0 km deep · 60 km away
32. 2.225km ENE of Big Bear City, CAMon, Aug 30, 11:39 AM PDT · 18292 days ago · 1 km deep · 60 km away
33. 2.325km ENE of Big Bear City, CAWed, Sep 1, 2:20 AM PDT · 18290 days ago · 1 km deep · 60 km away
34. 2.021km ENE of Barstow, CAThu, Sep 2, 10:50 PM PDT · 18289 days ago · 6 km deep · 25 km away
35. 2.18km N of Running Springs, CAFri, Sep 3, 5:38 AM PDT · 18288 days ago · 11 km deep · 85 km away
36. 2.419km NW of Yucca Valley, CAFri, Sep 3, 3:38 PM PDT · 18288 days ago · 5 km deep · 74 km away
37. 2.319km NW of Yucca Valley, CAFri, Sep 3, 7:42 PM PDT · 18288 days ago · 3 km deep · 74 km away
38. 2.119km NW of Yucca Valley, CAFri, Sep 3, 7:52 PM PDT · 18288 days ago · 0 km deep · 73 km away
39. 1.919km NW of Yucca Valley, CAFri, Sep 3, 9:22 PM PDT · 18288 days ago · 3 km deep · 74 km away
40. 2.118km NW of Yucca Valley, CASat, Sep 4, 2:45 AM PDT · 18287 days ago · 3 km deep · 74 km away
41. 1.731km E of Barstow, CASun, Sep 5, 12:29 PM PDT · 18286 days ago · 6 km deep · 13 km away
42. 3.018km N of Joshua Tree, CAMon, Sep 6, 11:54 AM PDT · 18285 days ago · 9 km deep · 70 km away
43. 1.920km N of Joshua Tree, CATue, Sep 7, 3:16 AM PDT · 18284 days ago · 6 km deep · 68 km away
44. 2.34km SSE of Yucca Valley, CAMon, Sep 13, 1:21 AM PDT · 18279 days ago · 11 km deep · 91 km away
45. 2.816km SW of Ludlow, CAThu, Sep 16, 8:15 AM PDT · 18275 days ago · 3 km deep · 37 km away
46. 2.12km ENE of Barstow, CAFri, Sep 17, 8:21 PM PDT · 18274 days ago · 0 km deep · 41 km away
47. 2.721km ENE of Barstow, CASun, Sep 19, 9:55 PM PDT · 18272 days ago · 3 km deep · 25 km away
48. 1.89km NE of Lake Arrowhead, CATue, Sep 21, 5:44 PM PDT · 18270 days ago · 10 km deep · 84 km away
49. 2.116km NW of Yucca Valley, CAMon, Sep 27, 1:50 AM PDT · 18264 days ago · 6 km deep · 76 km away
50. 2.210km ENE of Barstow, CATue, Sep 28, 12:26 AM PDT · 18264 days ago · 2 km deep · 34 km away
51. 1.740km W of Fort Irwin, CAWed, Sep 29, 2:39 AM PDT · 18262 days ago · 5 km deep · 66 km away

Before

1. 1.614km SE of Big Bear City, CASun, Aug 1, 8:55 AM PDT · 18321 days ago · 10 km deep · 84 km away
2. 1.710km SSW of Lucerne Valley, CAWed, Jul 28, 9:55 AM PDT · 18325 days ago · 6 km deep · 73 km away
3. 2.611km NNW of Barstow, CASat, Jul 24, 8:44 AM PDT · 18329 days ago · 4 km deep · 47 km away
4. 2.27km W of Big Bear Lake, CAFri, Jul 23, 10:04 PM PDT · 18330 days ago · 4 km deep · 82 km away
5. 1.720km NW of Yucca Valley, CAFri, Jul 23, 3:03 PM PDT · 18330 days ago · 13 km deep · 75 km away
6. 1.98km WSW of Morongo Valley, CAThu, Jul 22, 9:10 AM PDT · 18331 days ago · 12 km deep · 99 km away
7. 1.911km WNW of Morongo Valley, CATue, Jul 20, 8:45 PM PDT · 18333 days ago · 12 km deep · 93 km away
8. 2.111km W of Lucerne Valley, CAMon, Jul 19, 10:17 PM PDT · 18334 days ago · 0 km deep · 71 km away
9. 2.07km SW of Lucerne Valley, CAMon, Jul 19, 8:05 PM PDT · 18334 days ago · 2 km deep · 70 km away
10. 2.511km WNW of Morongo Valley, CAMon, Jul 19, 2:52 AM PDT · 18334 days ago · 1 km deep · 93 km away
11. 1.81km NNE of Morongo Valley, CAWed, Jul 14, 2:28 AM PDT · 18339 days ago · 10 km deep · 93 km away
12. 2.421km NNW of Barstow, CASat, Jul 3, 11:06 PM PDT · 18350 days ago · 2 km deep · 55 km away
13. 2.114km W of Morongo Valley, CASat, Jul 3, 10:42 AM PDT · 18350 days ago · 13 km deep · 97 km away
14. 1.88km S of Yucca Valley, CASat, Jul 3, 10:40 AM PDT · 18350 days ago · 6 km deep · 96 km away

From the USGS Earthquake Hazards Program and its partner networks, event ci153821 (also filed as usp0000hp9). Read Tue, Sep 29, 2026, 8:01 PM UTC.