M1.9 earthquake 27km WNW of Ludlow, CA

Magnitude

1.9 (Mc), micro

Magnitude from

Southern California Seismic Network

Local time

Mon, May 4, 1981, 4:43 PM PDT

UTC

1981-05-04 23:43:24 UTC

Depth

4.8 km (3.0 mi), shallow

Epicenter

34.831° N, 116.426° W

Region

California

Tsunami flag

No

Status

Reviewed by a seismologist

Location uncertainty

About 1.4 km horizontally, 20.3 km in depth

Depth from

From location

Station coverage gap

200°, poorly surrounded by stations

Stations used

8

• Yermo, CaliforniaPopulation 623. Forecast37 kmESE
• Barstow, CaliforniaPopulation 23,692. Forecast55 kmE
• Victorville, CaliforniaPopulation 122,225. Forecast86 kmENE
• Los Angeles, CaliforniaPopulation 3,820,914. Forecast188 kmENE

After

1. 1.620km NE of Thousand Palms, CAThu, May 7, 1:17 PM PDT · 16584 days ago · 10 km deep · 98 km away
2. 1.529km WNW of Ludlow, CAThu, May 7, 6:10 PM PDT · 16584 days ago · 3 km deep · 7 km away
3. 2.06km ENE of Joshua Tree, CASat, May 9, 12:25 PM PDT · 16582 days ago · 0 km deep · 76 km away
4. 1.716km S of Amboy, CASat, May 9, 1:05 PM PDT · 16582 days ago · 1 km deep · 77 km away
5. 1.929km SSE of Ludlow, CASat, May 9, 4:09 PM PDT · 16582 days ago · 1 km deep · 52 km away
6. 1.97km ESE of Ludlow, CASun, May 10, 6:43 AM PDT · 16581 days ago · -1 km deep · 34 km away
7. 1.82km SSE of Yucca Valley, CASun, May 10, 7:18 AM PDT · 16581 days ago · 6 km deep · 81 km away
8. 2.422km ENE of Barstow, CASun, May 10, 11:30 AM PDT · 16581 days ago · 0 km deep · 38 km away
9. 1.927km NW of Fort Irwin, CASun, May 10, 9:26 PM PDT · 16580 days ago · 2 km deep · 79 km away
10. 2.06km W of Big Bear Lake, CAMon, May 11, 4:09 PM PDT · 16580 days ago · 5 km deep · 83 km away
11. 1.611km SW of Morongo Valley, CASun, May 17, 2:40 PM PDT · 16574 days ago · 15 km deep · 97 km away
12. 1.710km NNE of Running Springs, CAMon, May 18, 7:57 PM PDT · 16572 days ago · 8 km deep · 84 km away
13. 1.620km SSE of Joshua Tree, CAFri, May 22, 5:52 AM PDT · 16569 days ago · 5 km deep · 98 km away
14. 2.16km W of Big Bear Lake, CAMon, May 25, 3:36 PM PDT · 16566 days ago · 5 km deep · 83 km away
15. 2.39km ENE of Barstow, CATue, May 26, 4:41 AM PDT · 16565 days ago · 5 km deep · 48 km away
16. 2.023km N of Yucca Valley, CATue, May 26, 4:46 AM PDT · 16565 days ago · 5 km deep · 57 km away
17. 1.617km N of Yucca Valley, CAWed, May 27, 3:39 PM PDT · 16564 days ago · -1 km deep · 62 km away
18. 2.014km S of Amboy, CASat, May 30, 10:36 AM PDT · 16561 days ago · 2 km deep · 75 km away
19. 1.54km ESE of Running Springs, CASun, May 31, 12:35 PM PDT · 16560 days ago · 3 km deep · 92 km away
20. 2.140km WSW of Tecopa, CASun, May 31, 4:27 PM PDT · 16560 days ago · 5 km deep · 98 km away
21. 1.611km SW of Morongo Valley, CAMon, Jun 1, 11:34 PM PDT · 16558 days ago · 16 km deep · 98 km away
22. 1.612km WSW of Morongo Valley, CATue, Jun 2, 12:13 PM PDT · 16558 days ago · 16 km deep · 96 km away
23. 1.514km SSW of Amboy, CAThu, Jun 4, 1:48 PM PDT · 16556 days ago · 5 km deep · 73 km away
24. 1.814km S of Amboy, CAFri, Jun 5, 11:30 AM PDT · 16555 days ago · 1 km deep · 76 km away
25. 1.522km NNW of Yucca Valley, CAThu, Jun 11, 1:42 PM PDT · 16549 days ago · 1 km deep · 58 km away
26. 1.65km NNW of Running Springs, CASat, Jun 13, 10:49 PM PDT · 16546 days ago · 2 km deep · 91 km away
27. 2.17km ESE of Running Springs, CASun, Jun 14, 5:15 PM PDT · 16546 days ago · 6 km deep · 91 km away
28. 1.59km NE of Cabazon, CASun, Jun 14, 6:21 PM PDT · 16546 days ago · 12 km deep · 99 km away
29. 1.612km NE of Cabazon, CAMon, Jun 15, 11:53 AM PDT · 16545 days ago · 14 km deep · 97 km away
30. 2.235km NE of Big Bear City, CAMon, Jun 15, 1:19 PM PDT · 16545 days ago · 2 km deep · 45 km away
31. 1.76km SSW of Morongo Valley, CATue, Jun 23, 4:31 AM PDT · 16537 days ago · 15 km deep · 94 km away
32. 1.516km SSE of Barstow, CATue, Jun 23, 6:46 PM PDT · 16537 days ago · 8 km deep · 50 km away
33. 1.65km S of Morongo Valley, CAThu, Jun 25, 11:46 PM PDT · 16534 days ago · 6 km deep · 94 km away
34. 1.637km ENE of Lucerne Valley, CAFri, Jun 26, 6:46 PM PDT · 16534 days ago · 5 km deep · 30 km away
35. 1.818km ENE of Lucerne Valley, CASun, Jun 28, 9:25 PM PDT · 16531 days ago · -2 km deep · 48 km away
36. 1.610km N of Cabazon, CAWed, Jul 1, 5:52 AM PDT · 16529 days ago · 16 km deep · 97 km away
37. 1.818km S of Amboy, CAThu, Jul 2, 9:39 AM PDT · 16528 days ago · 5 km deep · 78 km away
38. 2.318km S of Joshua Tree, CAFri, Jul 3, 3:08 PM PDT · 16527 days ago · 0 km deep · 96 km away

Before

1. 1.59km SSW of Morongo Valley, CASun, May 3, 5:40 PM PDT · 16588 days ago · 11 km deep · 97 km away
2. 2.46km WNW of Desert Hot Springs, CASun, May 3, 9:15 AM PDT · 16588 days ago · 10 km deep · 96 km away
3. 1.76km E of Running Springs, CAFri, May 1, 5:20 AM PDT · 16590 days ago · 0 km deep · 88 km away
4. 1.737km N of Yucca Valley, CAThu, Apr 30, 5:45 AM PDT · 16591 days ago · 0 km deep · 43 km away
5. 1.520km SW of Amboy, CAThu, Apr 30, 5:25 AM PDT · 16591 days ago · 10 km deep · 64 km away
6. 1.923km NNW of Barstow, CAWed, Apr 29, 8:54 PM PDT · 16591 days ago · 3 km deep · 71 km away
7. 1.722km NNW of Barstow, CAWed, Apr 29, 8:05 PM PDT · 16591 days ago · 3 km deep · 70 km away
8. 1.723km NNW of Barstow, CAWed, Apr 29, 7:09 PM PDT · 16591 days ago · 3 km deep · 71 km away
9. 1.916km NE of Barstow, CAWed, Apr 29, 3:01 PM PDT · 16592 days ago · -1 km deep · 48 km away
10. 2.228km N of Yucca Valley, CAWed, Apr 29, 7:37 AM PDT · 16592 days ago · 1 km deep · 52 km away
11. 1.528km N of Yucca Valley, CAWed, Apr 29, 3:55 AM PDT · 16592 days ago · 2 km deep · 52 km away
12. 1.724km N of Yucca Valley, CAMon, Apr 27, 11:39 AM PDT · 16594 days ago · 1 km deep · 56 km away
13. 2.37km NNE of Running Springs, CAFri, Apr 24, 3:54 PM PST · 16597 days ago · 4 km deep · 87 km away
14. 2.111km SW of Morongo Valley, CAFri, Apr 24, 10:57 AM PST · 16597 days ago · 12 km deep · 97 km away
15. 1.810km E of Barstow, CAThu, Apr 23, 5:12 PM PST · 16598 days ago · 4 km deep · 45 km away
16. 1.522km ENE of Barstow, CAThu, Apr 23, 3:23 PM PST · 16598 days ago · 5 km deep · 35 km away
17. 1.78km WNW of Twentynine Palms, CAWed, Apr 22, 8:01 AM PST · 16599 days ago · 10 km deep · 77 km away
18. 1.511km E of Barstow, CAWed, Apr 22, 4:28 AM PST · 16599 days ago · 4 km deep · 45 km away
19. 1.611km E of Barstow, CATue, Apr 21, 1:35 PM PST · 16600 days ago · 3 km deep · 45 km away
20. 1.919km SSE of Joshua Tree, CASun, Apr 19, 3:10 PM PST · 16602 days ago · -1 km deep · 97 km away

From the USGS Earthquake Hazards Program and its partner networks, event ci515438. Read Fri, Oct 2, 2026, 1:37 PM UTC.