California earthquakes

M3.7 earthquake 10 km SSE of Walker, California

A magnitude 3.7 earthquake struck 10 km SSE of Walker, California on Fri, Mar 20, 1987, 7:45 AM PST (15:45 UTC), 3 km (2 mi) below the surface.

A larger quake followed: M4.2 3 km S of Mammoth Lakes, California. This one was a foreshock.

Walker forecastMore in California

Map

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

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The earthquake

Magnitude
3.7 (ml), minor
Local time
UTC
1987-03-20 15:45:10 UTC
Depth
2.8 km (1.7 mi), shallow
Epicenter
38.431° N, 119.432° 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 0.2 km horizontally, 0.9 km in depth
Depth from
From location
Station coverage gap
90°
Stations used
52

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 54 in the 60 days after this one and 16 in the 30 days before it.

After

  1. 2.411 km WNW of Bridgeport, California · 14428 days ago · 5 km deep · 18 km away
  2. 1.69 km WNW of Topaz Lake, Nevada · 14424 days ago · 0 km deep · 38 km away
  3. 1.53 km ESE of Mammoth Lakes, California · 14423 days ago · 4 km deep · 98 km away
  4. 1.820 km ENE of Mono City, California · 14423 days ago · 6 km deep · 56 km away
  5. 1.731 km NW of Benton, California · 14422 days ago · 1 km deep · 76 km away
  6. 2.015 km SE of Yosemite Valley, California · 14422 days ago · 3 km deep · 86 km away
  7. 1.97 km ESE of Mono City, California · 14421 days ago · 10 km deep · 56 km away
  8. 1.831 km ENE of Lee Vining, California · 14420 days ago · 2 km deep · 72 km away
  9. 2.031 km ENE of Lee Vining, California · 14420 days ago · 2 km deep · 71 km away
  10. 2.130 km ENE of Lee Vining, California · 14420 days ago · 1 km deep · 71 km away
  11. 2.430 km ENE of Lee Vining, California · 14418 days ago · 1 km deep · 71 km away
  12. 2.019 km NW of Benton, California · 14418 days ago · 3 km deep · 89 km away
  13. 1.633 km ENE of Lee Vining, California · 14417 days ago · 0 km deep · 73 km away
  14. 2.310 km E of Markleeville, California · 14415 days ago · -1 km deep · 35 km away
  15. 2.511 km NNW of Bridgeport, California · 14414 days ago · 6 km deep · 15 km away
  16. 1.626 km ENE of Lee Vining, California · 14413 days ago · 9 km deep · 67 km away
  17. 2.032 km E of Mono City, California · 14411 days ago · 4 km deep · 69 km away
  18. 2.29 km SSE of Walker, California · 14411 days ago · 1 km deep · 1 km away
  19. 2.512 km WNW of Bridgeport, California · 14411 days ago · 7 km deep · 14 km away
  20. 1.830 km E of Lee Vining, California · 14410 days ago · 5 km deep · 76 km away
  21. 2.49 km E of Markleeville, California · 14409 days ago · 2 km deep · 35 km away
  22. 2.410 km SSE of Walker, California · 14406 days ago · 3 km deep · 1 km away
  23. 1.711 km ENE of Mammoth Lakes, California · 14404 days ago · 3 km deep · 98 km away
  24. 1.611 km ENE of Mammoth Lakes, California · 14404 days ago · 3 km deep · 98 km away
  25. 1.7Central California · 14403 days ago · 5 km deep · 98 km away
  26. 3.10 km NW of Mesa Vista, California · 14402 days ago · -1 km deep · 53 km away
  27. 2.12 km SW of Walker, California · 14400 days ago · 5 km deep · 10 km away
  28. 2.67 km SSW of Markleeville, California · 14399 days ago · -1 km deep · 39 km away
  29. 1.87 km SSW of Markleeville, California · 14399 days ago · 4 km deep · 39 km away
  30. 1.65 km S of Markleeville, California · 14399 days ago · 1 km deep · 38 km away
  31. 1.64 km W of Mammoth Lakes, California · 14397 days ago · 1 km deep · 95 km away
  32. 1.916 km E of Mono City, California · 14394 days ago · 9 km deep · 59 km away
  33. 2.911 km E of Kirkwood, California · 14393 days ago · -2 km deep · 53 km away
  34. 1.812 km E of Kirkwood, California · 14393 days ago · 1 km deep · 54 km away
  35. 1.93 km E of Mammoth Lakes, California · 14389 days ago · 2 km deep · 97 km away
  36. 1.510 km E of Mammoth Lakes, California · 14385 days ago · 3 km deep · 100 km away
  37. 2.23 km ESE of Mammoth Lakes, California · 14385 days ago · 6 km deep · 98 km away
  38. 2.416 km E of Mono City, California · 14385 days ago · 9 km deep · 59 km away
  39. 4.23 km S of Mammoth Lakes, California · 14384 days ago · 5 km deep · 99 km away
  40. 1.63 km S of Mammoth Lakes, California · 14384 days ago · 5 km deep · 99 km away
  41. 1.6California-Nevada border region · 14383 days ago · 3 km deep · 55 km away
  42. 1.84 km E of Mammoth Lakes, California · 14382 days ago · -1 km deep · 99 km away
  43. 2.12 km SW of Mammoth Lakes, California · 14382 days ago · 5 km deep · 96 km away
  44. 1.510 km SE of Walker, California · 14381 days ago · 5 km deep · 4 km away
  45. 3.425 km S of Hawthorne, Nevada · 14377 days ago · 6 km deep · 68 km away
  46. 1.819 km SE of Yosemite Valley, California · 14375 days ago · 10 km deep · 89 km away
  47. 2.123 km ESE of Yosemite Valley, California · 14374 days ago · 11 km deep · 89 km away
  48. 1.731 km ENE of Lee Vining, California · 14374 days ago · 6 km deep · 71 km away
  49. 2.46 km WSW of Mammoth Lakes, California · 14373 days ago · 4 km deep · 96 km away
  50. 1.825 km ESE of Yosemite Valley, California · 14373 days ago · 15 km deep · 88 km away
  51. 1.723 km ESE of Yosemite Valley, California · 14373 days ago · 14 km deep · 89 km away
  52. 1.525 km ESE of Yosemite Valley, California · 14373 days ago · 6 km deep · 89 km away
  53. 2.023 km ESE of Yosemite Valley, California · 14373 days ago · 13 km deep · 89 km away
  54. 1.619 km SE of Yosemite Valley, California · 14373 days ago · 15 km deep · 90 km away

Before

  1. 1.919 km ENE of Mono City, California · 14432 days ago · 7 km deep · 56 km away
  2. 1.84 km E of Mammoth Lakes, California · 14432 days ago · 7 km deep · 98 km away
  3. 1.713 km NNW of Benton, California · 14434 days ago · 5 km deep · 96 km away
  4. 2.018 km ESE of Walker, California · 14434 days ago · 0 km deep · 11 km away
  5. 1.812 km ESE of Kirkwood, California · 14436 days ago · -1 km deep · 51 km away
  6. 1.720 km ENE of Mono City, California · 14437 days ago · 4 km deep · 55 km away
  7. 2.315 km ESE of Yosemite Valley, California · 14438 days ago · 27 km deep · 82 km away
  8. 2.023 km ESE of Yosemite Valley, California · 14438 days ago · 21 km deep · 88 km away
  9. 1.817 km SE of Yosemite Valley, California · 14444 days ago · -2 km deep · 88 km away
  10. 1.820 km SE of Yosemite Valley, California · 14448 days ago · 4 km deep · 89 km away
  11. 2.033 km ENE of Lee Vining, California · 14449 days ago · 9 km deep · 73 km away
  12. 1.736 km E of Mono City, California · 14450 days ago · 1 km deep · 72 km away
  13. 2.35 km SSE of Markleeville, California · 14455 days ago · 5 km deep · 37 km away
  14. 2.97 km S of Bridgeport, California · 14456 days ago · 7 km deep · 32 km away
  15. 1.830 km NW of Benton, California · 14459 days ago · 7 km deep · 77 km away
  16. 2.25 km SSW of Markleeville, California · 14461 days ago · -2 km deep · 40 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc97146 (also filed as usp00033fw). Read Tue, Sep 22, 2026, 7:50 PM UTC.