M1.9 earthquake 20km SSE of Fort Irwin, CA

Magnitude

1.9 (Mh), micro

Magnitude from

Southern California Seismic Network

Local time

Sun, Apr 5, 1981, 10:52 PM PST

UTC

1981-04-06 06:52:34 UTC

Depth

4.9 km (3.1 mi), shallow

Epicenter

35.088° N, 116.642° W

Region

California

Tsunami flag

No

Status

Reviewed by a seismologist

Location uncertainty

About 1.2 km horizontally, 31.6 km in depth

Depth from

Operator assigned

Station coverage gap

168°

Stations used

9

• Fort Irwin, CaliforniaPopulation 8,845. Forecast20 kmSSE
• Barstow, CaliforniaPopulation 23,692. Forecast41 kmENE
• Victorville, CaliforniaPopulation 122,225. Forecast85 kmNE
• Los Angeles, CaliforniaPopulation 3,820,914. Forecast187 kmNE

After

1. 1.724km N of Yucca Valley, CATue, Apr 7, 5:50 AM PST · 16616 days ago · 0 km deep · 87 km away
2. 1.624km NNW of Yucca Valley, CATue, Apr 7, 5:38 PM PST · 16616 days ago · 0 km deep · 87 km away
3. 1.927km WSW of Amboy, CAFri, Apr 10, 7:50 AM PST · 16613 days ago · 4 km deep · 88 km away
4. 1.528km WSW of Amboy, CAFri, Apr 10, 10:25 AM PST · 16613 days ago · 4 km deep · 88 km away
5. 1.739km SSE of Fort Irwin, CASun, Apr 12, 12:31 PM PST · 16611 days ago · 5 km deep · 20 km away
6. 2.016km E of Big Bear City, CATue, Apr 14, 2:04 PM PST · 16609 days ago · 5 km deep · 94 km away
7. 1.510km ENE of Barstow, CAFri, Apr 17, 2:12 AM PST · 16606 days ago · 4 km deep · 31 km away
8. 1.611km E of Barstow, CATue, Apr 21, 1:35 PM PST · 16602 days ago · 3 km deep · 31 km away
9. 1.511km E of Barstow, CAWed, Apr 22, 4:28 AM PST · 16601 days ago · 4 km deep · 31 km away
10. 1.522km ENE of Barstow, CAThu, Apr 23, 3:23 PM PST · 16600 days ago · 5 km deep · 21 km away
11. 1.810km E of Barstow, CAThu, Apr 23, 5:12 PM PST · 16600 days ago · 4 km deep · 31 km away
12. 2.37km NNE of Running Springs, CAFri, Apr 24, 3:54 PM PST · 16599 days ago · 4 km deep · 100 km away
13. 1.724km N of Yucca Valley, CAMon, Apr 27, 11:39 AM PDT · 16596 days ago · 1 km deep · 86 km away
14. 1.528km N of Yucca Valley, CAWed, Apr 29, 3:55 AM PDT · 16594 days ago · 2 km deep · 83 km away
15. 2.228km N of Yucca Valley, CAWed, Apr 29, 7:37 AM PDT · 16594 days ago · 1 km deep · 83 km away
16. 1.916km NE of Barstow, CAWed, Apr 29, 3:01 PM PDT · 16594 days ago · -1 km deep · 26 km away
17. 1.723km NNW of Barstow, CAWed, Apr 29, 7:09 PM PDT · 16594 days ago · 3 km deep · 46 km away
18. 1.722km NNW of Barstow, CAWed, Apr 29, 8:05 PM PDT · 16594 days ago · 3 km deep · 45 km away
19. 1.923km NNW of Barstow, CAWed, Apr 29, 8:54 PM PDT · 16594 days ago · 3 km deep · 46 km away
20. 1.520km SW of Amboy, CAThu, Apr 30, 5:25 AM PDT · 16593 days ago · 10 km deep · 98 km away
21. 1.737km N of Yucca Valley, CAThu, Apr 30, 5:45 AM PDT · 16593 days ago · 0 km deep · 73 km away
22. 1.927km WNW of Ludlow, CAMon, May 4, 4:43 PM PDT · 16589 days ago · 5 km deep · 35 km away
23. 1.529km WNW of Ludlow, CAThu, May 7, 6:10 PM PDT · 16586 days ago · 3 km deep · 38 km away
24. 2.012km ESE of Johannesburg, CAFri, May 8, 2:40 AM PDT · 16585 days ago · 4 km deep · 83 km away
25. 1.929km SSE of Ludlow, CASat, May 9, 4:09 PM PDT · 16584 days ago · 1 km deep · 86 km away
26. 1.97km ESE of Ludlow, CASun, May 10, 6:43 AM PDT · 16583 days ago · -1 km deep · 67 km away
27. 2.422km ENE of Barstow, CASun, May 10, 11:30 AM PDT · 16583 days ago · 0 km deep · 19 km away
28. 1.927km NW of Fort Irwin, CASun, May 10, 9:26 PM PDT · 16583 days ago · 2 km deep · 44 km away
29. 2.06km W of Big Bear Lake, CAMon, May 11, 4:09 PM PDT · 16582 days ago · 5 km deep · 100 km away
30. 1.710km NNE of Running Springs, CAMon, May 18, 7:57 PM PDT · 16575 days ago · 8 km deep · 97 km away
31. 2.16km W of Big Bear Lake, CAMon, May 25, 3:36 PM PDT · 16568 days ago · 5 km deep · 99 km away
32. 2.39km ENE of Barstow, CATue, May 26, 4:41 AM PDT · 16567 days ago · 5 km deep · 32 km away
33. 2.023km N of Yucca Valley, CATue, May 26, 4:46 AM PDT · 16567 days ago · 5 km deep · 88 km away
34. 1.617km N of Yucca Valley, CAWed, May 27, 3:39 PM PDT · 16566 days ago · -1 km deep · 93 km away
35. 1.824km SSE of Trona, CAFri, May 29, 7:03 AM PDT · 16564 days ago · 5 km deep · 80 km away
36. 2.140km WSW of Tecopa, CASun, May 31, 4:27 PM PDT · 16562 days ago · 5 km deep · 68 km away

Before

1. 2.134km N of Yucca Valley, CAFri, Apr 3, 9:18 AM PST · 16620 days ago · -1 km deep · 77 km away
2. 1.633km S of Fort Irwin, CASun, Mar 22, 4:13 PM PST · 16632 days ago · 5 km deep · 14 km away
3. 1.89km ENE of Lucerne Valley, CASun, Mar 22, 8:49 AM PST · 16632 days ago · 3 km deep · 71 km away
4. 1.822km SW of Ludlow, CAFri, Mar 20, 12:38 PM PST · 16634 days ago · 5 km deep · 60 km away
5. 1.628km N of Twentynine Palms, CAThu, Mar 19, 3:50 AM PST · 16635 days ago · 5 km deep · 94 km away
6. 1.618km ENE of Lucerne Valley, CAWed, Mar 18, 5:23 PM PST · 16636 days ago · 4 km deep · 63 km away
7. 2.022km N of Yucca Valley, CASat, Mar 14, 1:52 PM PST · 16640 days ago · -1 km deep · 88 km away
8. 1.624km NNW of Yucca Valley, CAMon, Mar 9, 5:49 PM PST · 16645 days ago · 2 km deep · 87 km away
9. 2.09km SSW of Tecopa, CASat, Mar 7, 2:53 PM PST · 16647 days ago · 5 km deep · 84 km away

From the USGS Earthquake Hazards Program and its partner networks, event ci515862. Read Sun, Oct 4, 2026, 7:48 PM UTC.