California earthquakes

M4.4 earthquake 37km NW of Ludlow, CA

A magnitude 4.4 earthquake struck 37km NW of Ludlow, CA on Mon, Apr 21, 1947, 11:15 AM GMT-8 (19:15 UTC), 6 km (4 mi) below the surface.

A larger quake followed: M4.7 22km NNW of Twentynine Palms, CA. This one was a foreshock.

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Map

Where this earthquake was located, with the others nearby. Select one for its page.

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The earthquake

Magnitude
4.4 (ml), light
Local time
UTC
1947-04-21 19:15:29 UTC
Depth
6.0 km (3.7 mi), shallow
Epicenter
34.930° N, 116.478° W
Tsunami flag
No
Status
Reviewed by a seismologist

Did you feel it?

No one has reported feeling this quake to the USGS.

How well it is located

Reviewed by a seismologist.

Location uncertainty
About 1.9 km horizontally, 31.6 km in depth
Magnitude uncertainty
±0.11
Depth from
Operator assigned
Station coverage gap
236°, poorly surrounded by stations
Stations used
7

Nearest places

Distance and direction from each place to the epicenter, with its forecast.

Nearby

Within 100 km, magnitude 1.5 and up: 82 in the 60 days after this one and 108 in the 30 days before it.

After

  1. 3.637km NW of Ludlow, CA · 29009 days ago · 6 km deep · 1 km away
  2. 3.539km NW of Ludlow, CA · 29009 days ago · 6 km deep · 3 km away
  3. 3.234km NW of Ludlow, CA · 29009 days ago · 6 km deep · 3 km away
  4. 2.735km SSE of Fort Irwin, CA · 29009 days ago · 6 km deep · 8 km away
  5. 3.123km WNW of Ludlow, CA · 29009 days ago · 6 km deep · 16 km away
  6. 3.024km WNW of Ludlow, CA · 29009 days ago · 6 km deep · 15 km away
  7. 2.735km SSE of Fort Irwin, CA · 29009 days ago · 6 km deep · 8 km away
  8. 2.735km SSE of Fort Irwin, CA · 29008 days ago · 6 km deep · 8 km away
  9. 2.735km SSE of Fort Irwin, CA · 29008 days ago · 6 km deep · 8 km away
  10. 2.734km NW of Ludlow, CA · 29008 days ago · 6 km deep · 4 km away
  11. 2.831km WNW of Ludlow, CA · 29008 days ago · 6 km deep · 8 km away
  12. 2.736km NW of Ludlow, CA · 29008 days ago · 6 km deep · 1 km away
  13. 2.631km WNW of Ludlow, CA · 29008 days ago · 6 km deep · 9 km away
  14. 3.222km WNW of Ludlow, CA · 29008 days ago · 6 km deep · 18 km away
  15. 2.841km W of Ludlow, CA · 29007 days ago · 6 km deep · 26 km away
  16. 3.140km ESE of Barstow, CA · 29007 days ago · 6 km deep · 26 km away
  17. 2.632km WNW of Ludlow, CA · 29007 days ago · 6 km deep · 14 km away
  18. 3.238km NW of Ludlow, CA · 29006 days ago · 6 km deep · 6 km away
  19. 2.739km SSE of Fort Irwin, CA · 29006 days ago · 6 km deep · 3 km away
  20. 2.640km WNW of Ludlow, CA · 29005 days ago · 6 km deep · 7 km away
  21. 2.724km SSE of Fort Irwin, CA · 29005 days ago · 6 km deep · 19 km away
  22. 2.434km WNW of Ludlow, CA · 29004 days ago · 6 km deep · 8 km away
  23. 3.137km NW of Ludlow, CA · 29004 days ago · 6 km deep · 10 km away
  24. 3.731km S of Fort Irwin, CA · 29003 days ago · 6 km deep · 18 km away
  25. 2.527km W of Ludlow, CA · 29003 days ago · 6 km deep · 27 km away
  26. 2.737km SSE of Fort Irwin, CA · 29003 days ago · 6 km deep · 11 km away
  27. 2.939km WNW of Ludlow, CA · 29002 days ago · 6 km deep · 5 km away
  28. 2.736km WNW of Ludlow, CA · 29002 days ago · 6 km deep · 8 km away
  29. 2.836km NW of Ludlow, CA · 29001 days ago · 6 km deep · 1 km away
  30. 2.828km WNW of Ludlow, CA · 29000 days ago · 6 km deep · 13 km away
  31. 2.541km WNW of Ludlow, CA · 28998 days ago · 6 km deep · 10 km away
  32. 2.334km WNW of Ludlow, CA · 28998 days ago · 6 km deep · 6 km away
  33. 3.833km WNW of Ludlow, CA · 28997 days ago · 6 km deep · 12 km away
  34. 2.628km WNW of Ludlow, CA · 28997 days ago · 6 km deep · 12 km away
  35. 3.117km NNE of Joshua Tree, CA · 28995 days ago · 6 km deep · 74 km away
  36. 2.936km E of Barstow, CA · 28994 days ago · 6 km deep · 14 km away
  37. 2.824km WNW of Ludlow, CA · 28994 days ago · 6 km deep · 14 km away
  38. 2.936km NW of Ludlow, CA · 28994 days ago · 6 km deep · 2 km away
  39. 3.234km WNW of Ludlow, CA · 28994 days ago · 6 km deep · 6 km away
  40. 2.829km WNW of Ludlow, CA · 28994 days ago · 6 km deep · 9 km away
  41. 2.820km NW of Ludlow, CA · 28993 days ago · 6 km deep · 17 km away
  42. 2.934km NW of Ludlow, CA · 28992 days ago · 6 km deep · 3 km away
  43. 2.930km WNW of Ludlow, CA · 28991 days ago · 6 km deep · 9 km away
  44. 2.935km NW of Ludlow, CA · 28990 days ago · 6 km deep · 3 km away
  45. 4.722km NNW of Twentynine Palms, CA · 28990 days ago · 6 km deep · 74 km away
  46. 3.126km E of Barstow, CA · 28990 days ago · 6 km deep · 25 km away
  47. 2.825km ENE of Barstow, CA · 28990 days ago · 6 km deep · 25 km away
  48. 2.829km NW of Ludlow, CA · 28990 days ago · 6 km deep · 9 km away
  49. 2.838km WNW of Ludlow, CA · 28989 days ago · 6 km deep · 6 km away
  50. 2.934km E of Barstow, CA · 28989 days ago · 6 km deep · 16 km away
  51. 2.824km NW of Ludlow, CA · 28989 days ago · 6 km deep · 13 km away
  52. 2.933km WNW of Ludlow, CA · 28987 days ago · 6 km deep · 8 km away
  53. 2.631km ESE of Barstow, CA · 28986 days ago · 6 km deep · 22 km away
  54. 2.834km SSE of Fort Irwin, CA · 28985 days ago · 6 km deep · 8 km away
  55. 2.940km WNW of Ludlow, CA · 28982 days ago · 6 km deep · 8 km away
  56. 2.89km WNW of Ludlow, CA · 28982 days ago · 6 km deep · 28 km away
  57. 2.834km WNW of Ludlow, CA · 28982 days ago · 6 km deep · 9 km away
  58. 2.239km W of Ludlow, CA · 28982 days ago · 6 km deep · 27 km away
  59. 3.837km SSE of Fort Irwin, CA · 28979 days ago · 6 km deep · 6 km away
  60. 2.334km SSE of Fort Irwin, CA · 28979 days ago · 6 km deep · 11 km away

The first 60 of 82.

Before

  1. 3.532km WNW of Ludlow, CA · 29010 days ago · 6 km deep · 8 km away
  2. 2.734km NW of Ludlow, CA · 29010 days ago · 6 km deep · 9 km away
  3. 2.735km NW of Ludlow, CA · 29010 days ago · 6 km deep · 4 km away
  4. 2.635km SSE of Fort Irwin, CA · 29010 days ago · 6 km deep · 8 km away
  5. 3.232km E of Barstow, CA · 29010 days ago · 6 km deep · 18 km away
  6. 2.936km SE of Fort Irwin, CA · 29012 days ago · 6 km deep · 10 km away
  7. 2.839km NW of Ludlow, CA · 29012 days ago · 6 km deep · 3 km away
  8. 3.738km NW of Ludlow, CA · 29012 days ago · 6 km deep · 2 km away
  9. 4.536km SSE of Fort Irwin, CA · 29012 days ago · 6 km deep · 8 km away
  10. 2.535km SSE of Fort Irwin, CA · 29013 days ago · 6 km deep · 8 km away
  11. 3.037km WNW of Ludlow, CA · 29013 days ago · 6 km deep · 12 km away
  12. 2.732km WNW of Ludlow, CA · 29013 days ago · 6 km deep · 13 km away
  13. 2.640km SSE of Fort Irwin, CA · 29013 days ago · 6 km deep · 7 km away
  14. 2.634km SSE of Fort Irwin, CA · 29013 days ago · 6 km deep · 7 km away
  15. 2.734km SSE of Fort Irwin, CA · 29014 days ago · 6 km deep · 8 km away
  16. 3.236km NW of Ludlow, CA · 29014 days ago · 6 km deep · 1 km away
  17. 2.334km WNW of Ludlow, CA · 29015 days ago · 6 km deep · 5 km away
  18. 2.438km SSE of Fort Irwin, CA · 29015 days ago · 6 km deep · 11 km away
  19. 2.837km SSE of Fort Irwin, CA · 29015 days ago · 6 km deep · 7 km away
  20. 2.734km E of Barstow, CA · 29016 days ago · 6 km deep · 17 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event ci3358421. Read Tue, Sep 22, 2026, 10:23 PM UTC.