California earthquakes

M1.7 earthquake 21km SW of Westmorland, CA

A magnitude 1.7 earthquake struck 21km SW of Westmorland, CA on Wed, Oct 21, 1981, 2:53 PM PDT (21:53 UTC), 9 km (5 mi) below the surface.

A larger quake followed: M2.4 18km N of Ocotillo, 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
1.7 (mh), micro
Local time
UTC
1981-10-21 21:53:03 UTC
Depth
8.6 km (5.4 mi), shallow
Epicenter
32.926° N, 115.807° 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 0.6 km horizontally, 0.7 km in depth
Depth from
From location
Station coverage gap
92°
Stations used
11

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 94 in the 60 days after this one and 81 in the 30 days before it.

After

  1. 2.418km N of Ocotillo, CA · 16406 days ago · 12 km deep · 14 km away
  2. 1.58km SW of Holtville, CA · 16406 days ago · 6 km deep · 40 km away
  3. 2.08km ESE of Puebla, B.C., MX · 16404 days ago · 6 km deep · 66 km away
  4. 2.314km SSW of Borrego Springs, CA · 16404 days ago · 8 km deep · 64 km away
  5. 2.122km ESE of Anza, CA · 16404 days ago · 6 km deep · 85 km away
  6. 1.710km SE of Ocotillo, CA · 16403 days ago · 4 km deep · 29 km away
  7. 1.524km WSW of Westmorland, CA · 16403 days ago · 7 km deep · 6 km away
  8. 1.712km SSW of Puebla, B.C., MX · 16402 days ago · 6 km deep · 62 km away
  9. 1.514km WNW of Calipatria, CA · 16401 days ago · 5 km deep · 31 km away
  10. 2.916km NNE of Borrego Springs, CA · 16401 days ago · 14 km deep · 68 km away
  11. 1.523km ESE of Anza, CA · 16400 days ago · 10 km deep · 85 km away
  12. 1.89km SW of Holtville, CA · 16400 days ago · 20 km deep · 40 km away
  13. 1.912km SE of Anza, CA · 16399 days ago · 4 km deep · 95 km away
  14. 1.96km W of Westmorland, CA · 16398 days ago · 5 km deep · 16 km away
  15. 2.111km SW of Salton City, CA · 16397 days ago · 6 km deep · 41 km away
  16. 1.74km SW of Brawley, CA · 16397 days ago · 13 km deep · 23 km away
  17. 1.513km SSW of Borrego Springs, CA · 16397 days ago · 6 km deep · 65 km away
  18. 1.57km S of Brawley, CA · 16396 days ago · 14 km deep · 26 km away
  19. 1.812km SSE of Bombay Beach, CA · 16395 days ago · 5 km deep · 38 km away
  20. 1.523km SSW of Ocotillo Wells, CA · 16394 days ago · 5 km deep · 41 km away
  21. 1.511km NNE of Borrego Springs, CA · 16394 days ago · 11 km deep · 68 km away
  22. 1.56km NNW of Ocotillo Wells, CA · 16391 days ago · 8 km deep · 44 km away
  23. 2.112km SE of Bombay Beach, CA · 16391 days ago · 4 km deep · 40 km away
  24. 1.528km ENE of Pine Valley, CA · 16390 days ago · 5 km deep · 42 km away
  25. 1.70km W of Julian, CA · 16388 days ago · 15 km deep · 76 km away
  26. 2.76km WSW of Imperial, CA · 16388 days ago · 6 km deep · 20 km away
  27. 1.615km N of Borrego Springs, CA · 16387 days ago · 2 km deep · 73 km away
  28. 1.813km NNW of Delta, B.C., MX · 16386 days ago · 6 km deep · 74 km away
  29. 1.526km WNW of Desert Center, CA · 16386 days ago · 5 km deep · 95 km away
  30. 2.310km NE of Julian, CA · 16385 days ago · 10 km deep · 71 km away
  31. 1.54km NW of Delta, B.C., MX · 16384 days ago · 6 km deep · 82 km away
  32. 1.724km NNW of Borrego Springs, CA · 16384 days ago · 9 km deep · 84 km away
  33. 1.822km SW of Ocotillo Wells, CA · 16384 days ago · 5 km deep · 44 km away
  34. 2.014km SE of Anza, CA · 16383 days ago · 10 km deep · 93 km away
  35. 1.714km NW of Delta, B.C., MX · 16382 days ago · 6 km deep · 72 km away
  36. 1.85km S of Brawley, CA · 16382 days ago · 10 km deep · 26 km away
  37. 2.115km SSE of Anza, CA · 16381 days ago · 12 km deep · 93 km away
  38. 2.354km SSW of Progreso, B.C., MX · 16380 days ago · 6 km deep · 87 km away
  39. 2.029km SSW of Progreso, B.C., MX · 16379 days ago · 6 km deep · 64 km away
  40. 1.512km SE of Puebla, B.C., MX · 16379 days ago · 6 km deep · 70 km away
  41. 1.58km E of Borrego Springs, CA · 16378 days ago · 5 km deep · 59 km away
  42. 1.518km ESE of Anza, CA · 16378 days ago · 9 km deep · 89 km away
  43. 1.98km SW of Holtville, CA · 16377 days ago · 18 km deep · 39 km away
  44. 2.354km SSW of Progreso, B.C., MX · 16377 days ago · 6 km deep · 88 km away
  45. 1.78km ENE of Puebla, B.C., MX · 16377 days ago · 11 km deep · 63 km away
  46. 2.96km SSW of Salton City, CA · 16374 days ago · 5 km deep · 39 km away
  47. 1.610km WSW of Tecate, B.C., MX · 16372 days ago · 4 km deep · 96 km away
  48. 3.458km ENE of Ensenada, B.C., MX · 16372 days ago · 6 km deep · 96 km away
  49. 1.512km WSW of Salton City, CA · 16371 days ago · 7 km deep · 43 km away
  50. 1.85km SSW of Salton City, CA · 16371 days ago · 3 km deep · 40 km away
  51. 1.79km SW of Salton City, CA · 16371 days ago · 2 km deep · 42 km away
  52. 1.55km NNW of Brawley, CA · 16371 days ago · 10 km deep · 26 km away
  53. 1.61km WSW of El Centro, CA · 16370 days ago · 16 km deep · 27 km away
  54. 1.914km E of Borrego Springs, CA · 16370 days ago · 9 km deep · 54 km away
  55. 1.618km ESE of Anza, CA · 16370 days ago · 9 km deep · 89 km away
  56. 1.516km NNW of Borrego Springs, CA · 16369 days ago · 11 km deep · 77 km away
  57. 2.012km NNE of Pine Valley, CA · 16369 days ago · 8 km deep · 62 km away
  58. 1.75km WSW of Imperial, CA · 16369 days ago · 12 km deep · 20 km away
  59. 1.712km SSE of Puebla, B.C., MX · 16369 days ago · 6 km deep · 69 km away
  60. 2.98km SSW of Salton City, CA · 16368 days ago · 10 km deep · 37 km away

The first 60 of 94.

Before

  1. 1.66km S of Brawley, CA · 16407 days ago · 12 km deep · 26 km away
  2. 1.817km SSW of Ocotillo, CA · 16407 days ago · 7 km deep · 44 km away
  3. 2.08km NW of Ocotillo, CA · 16408 days ago · 9 km deep · 29 km away
  4. 2.221km ESE of Anza, CA · 16408 days ago · 11 km deep · 87 km away
  5. 3.021km ESE of Anza, CA · 16408 days ago · 9 km deep · 89 km away
  6. 1.625km ENE of Pine Valley, CA · 16409 days ago · 6 km deep · 46 km away
  7. 2.013km SE of Anza, CA · 16409 days ago · 7 km deep · 94 km away
  8. 1.94km SW of Guadalupe Victoria, B.C., MX · 16409 days ago · 6 km deep · 97 km away
  9. 2.112km NE of Ocotillo Wells, CA · 16410 days ago · 7 km deep · 41 km away
  10. 2.112km NE of Ocotillo Wells, CA · 16411 days ago · 4 km deep · 41 km away
  11. 1.612km SW of Salton City, CA · 16411 days ago · 6 km deep · 41 km away
  12. 1.811km SW of Salton City, CA · 16411 days ago · 5 km deep · 41 km away
  13. 1.712km NE of Ocotillo Wells, CA · 16411 days ago · 5 km deep · 41 km away
  14. 3.112km NNE of Ocotillo Wells, CA · 16411 days ago · 5 km deep · 42 km away
  15. 2.212km NE of Ocotillo Wells, CA · 16411 days ago · 6 km deep · 41 km away
  16. 2.011km NNE of Ocotillo Wells, CA · 16411 days ago · 5 km deep · 42 km away
  17. 2.112km NE of Ocotillo Wells, CA · 16411 days ago · 5 km deep · 39 km away
  18. 1.712km NNE of Ocotillo Wells, CA · 16411 days ago · 3 km deep · 42 km away
  19. 3.712km SW of Salton City, CA · 16411 days ago · 15 km deep · 41 km away
  20. 2.012km SW of Salton City, CA · 16411 days ago · 5 km deep · 41 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event ci525919. Read Tue, Sep 22, 2026, 10:00 AM UTC.