California earthquakes

M1.6 earthquake 11km WSW of Anza, CA

A magnitude 1.6 earthquake struck 11km WSW of Anza, CA on Mon, Apr 20, 1981, 8:25 AM PST (16:25 UTC), 3 km (2 mi) below the surface.

A larger quake followed: M3.6 3km WNW of Lakeland Village, CA. This one was a foreshock.

Anza 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
1.6 (Mh), micro
Magnitude from
Southern California Seismic Network
Local time
UTC
1981-04-20 16:25:43 UTC
Depth
3.0 km (1.8 mi), shallow
Epicenter
33.507° N, 116.774° 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 0.4 km horizontally, 0.9 km in depth
Depth from
From location
Station coverage gap
108°
Stations used
17

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 174 in the 60 days after this one and 97 in the 30 days before it.

After

  1. 1.53km NNW of Loma Linda, CA · 16601 days ago · 16 km deep · 78 km away
  2. 1.58km NE of Aguanga, CA · 16600 days ago · 4 km deep · 3 km away
  3. 1.59km ENE of Aguanga, CA · 16600 days ago · 4 km deep · 3 km away
  4. 1.523km N of Borrego Springs, CA · 16599 days ago · 15 km deep · 35 km away
  5. 1.78km WNW of Twentynine Palms, CA · 16599 days ago · 10 km deep · 94 km away
  6. 1.69km ENE of Aguanga, CA · 16598 days ago · 3 km deep · 3 km away
  7. 1.819km E of Pine Valley, CA · 16598 days ago · 5 km deep · 87 km away
  8. 1.87km S of Idyllwild, CA · 16597 days ago · 14 km deep · 20 km away
  9. 2.111km SW of Morongo Valley, CA · 16597 days ago · 12 km deep · 54 km away
  10. 1.87km S of Idyllwild, CA · 16597 days ago · 14 km deep · 20 km away
  11. 2.37km NNE of Running Springs, CA · 16596 days ago · 4 km deep · 90 km away
  12. 1.511km NW of Warner Springs, CA · 16596 days ago · 9 km deep · 17 km away
  13. 2.821km NNW of Borrego Springs, CA · 16596 days ago · 12 km deep · 32 km away
  14. 1.610km NE of Aguanga, CA · 16595 days ago · 3 km deep · 1 km away
  15. 1.523km SSW of La Quinta, CA · 16595 days ago · 10 km deep · 32 km away
  16. 2.623km SSW of La Quinta, CA · 16595 days ago · 5 km deep · 32 km away
  17. 2.312km SE of Salton City, CA · 16595 days ago · 5 km deep · 90 km away
  18. 2.513km ENE of Indio, CA · 16595 days ago · 5 km deep · 70 km away
  19. 1.66km ESE of Valle Vista, CA · 16594 days ago · 13 km deep · 25 km away
  20. 2.15km SE of Valle Vista, CA · 16594 days ago · 13 km deep · 25 km away
  21. 1.75km ENE of Cabazon, CA · 16594 days ago · 13 km deep · 48 km away
  22. 1.724km N of Yucca Valley, CA · 16594 days ago · 1 km deep · 96 km away
  23. 1.620km NE of Pine Valley, CA · 16594 days ago · 5 km deep · 70 km away
  24. 1.54km WSW of Idyllwild, CA · 16593 days ago · 15 km deep · 23 km away
  25. 2.41km NNE of Loma Linda, CA · 16592 days ago · 11 km deep · 76 km away
  26. 2.128km SSW of Ocotillo Wells, CA · 16592 days ago · 12 km deep · 83 km away
  27. 1.710km WSW of Anza, CA · 16592 days ago · 3 km deep · 1 km away
  28. 1.510km WSW of Anza, CA · 16592 days ago · 4 km deep · 1 km away
  29. 1.512km SE of Anza, CA · 16592 days ago · 8 km deep · 18 km away
  30. 1.528km N of Yucca Valley, CA · 16592 days ago · 2 km deep · 100 km away
  31. 2.228km N of Yucca Valley, CA · 16592 days ago · 1 km deep · 100 km away
  32. 2.015km N of Indio, CA · 16591 days ago · 5 km deep · 65 km away
  33. 1.514km N of Borrego Springs, CA · 16591 days ago · 4 km deep · 38 km away
  34. 1.510km SSE of Cabazon, CA · 16591 days ago · 15 km deep · 36 km away
  35. 1.811km WSW of Anza, CA · 16591 days ago · 2 km deep · 1 km away
  36. 3.418km ESE of Anza, CA · 16591 days ago · 14 km deep · 26 km away
  37. 1.926km SSW of Ocotillo Wells, CA · 16590 days ago · 6 km deep · 83 km away
  38. 1.76km E of Running Springs, CA · 16590 days ago · 0 km deep · 83 km away
  39. 1.79km ENE of Aguanga, CA · 16590 days ago · 3 km deep · 3 km away
  40. 2.011km NE of Aguanga, CA · 16589 days ago · 2 km deep · 1 km away
  41. 1.512km SE of Anza, CA · 16589 days ago · 8 km deep · 17 km away
  42. 3.326km ENE of Pine Valley, CA · 16589 days ago · 12 km deep · 79 km away
  43. 2.46km WNW of Desert Hot Springs, CA · 16588 days ago · 10 km deep · 56 km away
  44. 2.225km ENE of Pine Valley, CA · 16588 days ago · 10 km deep · 79 km away
  45. 1.59km SSW of Morongo Valley, CA · 16587 days ago · 11 km deep · 54 km away
  46. 1.621km ESE of Anza, CA · 16587 days ago · 9 km deep · 29 km away
  47. 1.625km ENE of Pine Valley, CA · 16587 days ago · 6 km deep · 78 km away
  48. 2.822km ESE of Anza, CA · 16587 days ago · 14 km deep · 29 km away
  49. 3.023km ESE of Anza, CA · 16587 days ago · 14 km deep · 30 km away
  50. 1.921km ESE of Anza, CA · 16587 days ago · 12 km deep · 29 km away
  51. 2.422km ESE of Anza, CA · 16587 days ago · 12 km deep · 30 km away
  52. 1.821km ESE of Anza, CA · 16587 days ago · 13 km deep · 29 km away
  53. 2.28km S of Calimesa, CA · 16586 days ago · 12 km deep · 53 km away
  54. 1.58km NE of Borrego Springs, CA · 16586 days ago · 10 km deep · 47 km away
  55. 1.610km NE of Aguanga, CA · 16585 days ago · 3 km deep · 1 km away
  56. 1.511km WSW of Anza, CA · 16585 days ago · 3 km deep · 1 km away
  57. 1.910km ENE of Aguanga, CA · 16584 days ago · 2 km deep · 2 km away
  58. 1.610km WSW of Garnet, CA · 16584 days ago · 14 km deep · 43 km away
  59. 2.53km NE of Colton, CA · 16584 days ago · 7 km deep · 81 km away
  60. 2.83km NE of Colton, CA · 16584 days ago · 3 km deep · 80 km away

The first 60 of 174.

Before

  1. 1.57km S of Salton City, CA · 16601 days ago · 4 km deep · 81 km away
  2. 1.811km NW of Warner Springs, CA · 16601 days ago · 11 km deep · 17 km away
  3. 1.69km ESE of Ocotillo Wells, CA · 16601 days ago · 5 km deep · 81 km away
  4. 3.510km NW of Warner Springs, CA · 16601 days ago · 12 km deep · 19 km away
  5. 1.919km SSE of Joshua Tree, CA · 16601 days ago · -1 km deep · 72 km away
  6. 1.66km NE of North Shore, CA · 16602 days ago · 9 km deep · 82 km away
  7. 2.313km NE of Coachella, CA · 16602 days ago · 1 km deep · 71 km away
  8. 2.610km S of Idyllwild, CA · 16603 days ago · 12 km deep · 17 km away
  9. 1.610km ENE of Aguanga, CA · 16603 days ago · 6 km deep · 2 km away
  10. 2.514km NE of Coachella, CA · 16604 days ago · -1 km deep · 71 km away
  11. 2.414km NE of Coachella, CA · 16604 days ago · -1 km deep · 71 km away
  12. 2.015km SE of Ocotillo Wells, CA · 16604 days ago · 4 km deep · 87 km away
  13. 2.510km S of Cabazon, CA · 16605 days ago · 14 km deep · 36 km away
  14. 1.618km N of Borrego Springs, CA · 16605 days ago · 8 km deep · 36 km away
  15. 2.52km NNW of Colton, CA · 16605 days ago · 16 km deep · 82 km away
  16. 1.99km NNW of Anza, CA · 16606 days ago · 9 km deep · 15 km away
  17. 1.610km NE of Aguanga, CA · 16606 days ago · 4 km deep · 1 km away
  18. 2.310km NE of Ocotillo Wells, CA · 16606 days ago · 12 km deep · 76 km away
  19. 2.016km E of Big Bear City, CA · 16606 days ago · 5 km deep · 82 km away
  20. 1.68km NNE of Banning, CA · 16607 days ago · 17 km deep · 55 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event ci514654. Read Fri, Oct 2, 2026, 9:29 AM UTC.