California earthquakes

M1.6 earthquake 11km WSW of Anza, CA

A magnitude 1.6 earthquake struck 11km WSW of Anza, CA on Sun, Aug 16, 1981, 3:59 AM PDT (10:59 UTC), 7 km (4 mi) below the surface.

A larger quake followed: M4.0 8km NE of Julian, 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 (mc), micro
Local time
UTC
1981-08-16 10:59:37 UTC
Depth
6.6 km (4.1 mi), shallow
Epicenter
33.510° N, 116.775° 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 0.5 km horizontally, 1.4 km in depth
Depth from
From location
Station coverage gap
82°
Stations used
29

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 187 in the 60 days after this one and 91 in the 30 days before it.

After

  1. 2.94km SE of Highland, CA · 16481 days ago · 4 km deep · 76 km away
  2. 1.53km ESE of Highland, CA · 16481 days ago · 4 km deep · 77 km away
  3. 1.812km SSE of Anza, CA · 16481 days ago · 9 km deep · 17 km away
  4. 1.84km S of Lake Henshaw, CA · 16481 days ago · 17 km deep · 34 km away
  5. 2.59km S of La Quinta, CA · 16480 days ago · 3 km deep · 43 km away
  6. 1.84km SSE of Yucca Valley, CA · 16480 days ago · 7 km deep · 72 km away
  7. 1.515km N of Borrego Springs, CA · 16480 days ago · 3 km deep · 40 km away
  8. 1.715km N of Borrego Springs, CA · 16480 days ago · 3 km deep · 39 km away
  9. 2.110km NE of Cabazon, CA · 16480 days ago · 12 km deep · 52 km away
  10. 1.514km N of Borrego Springs, CA · 16479 days ago · 14 km deep · 38 km away
  11. 2.74km S of Yucca Valley, CA · 16479 days ago · 2 km deep · 71 km away
  12. 2.94km S of Yucca Valley, CA · 16479 days ago · 2 km deep · 71 km away
  13. 2.514km N of Borrego Springs, CA · 16479 days ago · 12 km deep · 39 km away
  14. 1.94km SSE of Yucca Valley, CA · 16479 days ago · 7 km deep · 72 km away
  15. 2.82km SE of Murrieta, CA · 16478 days ago · 5 km deep · 40 km away
  16. 2.410km ENE of Aguanga, CA · 16478 days ago · 4 km deep · 2 km away
  17. 2.54km SE of Highland, CA · 16478 days ago · 7 km deep · 76 km away
  18. 2.14km ESE of Highland, CA · 16478 days ago · 6 km deep · 76 km away
  19. 1.66km WSW of Beaumont, CA · 16477 days ago · 11 km deep · 50 km away
  20. 1.523km ESE of Ocotillo Wells, CA · 16477 days ago · 4 km deep · 96 km away
  21. 2.010km WSW of Anza, CA · 16477 days ago · 3 km deep · 1 km away
  22. 1.813km NE of Thousand Palms, CA · 16477 days ago · 7 km deep · 63 km away
  23. 1.810km N of Cabazon, CA · 16476 days ago · 15 km deep · 55 km away
  24. 1.54km ENE of Ocotillo Wells, CA · 16476 days ago · 11 km deep · 74 km away
  25. 1.511km SW of Anza, CA · 16475 days ago · 3 km deep · 1 km away
  26. 1.96km SSW of Salton City, CA · 16475 days ago · 3 km deep · 80 km away
  27. 1.834km NNE of North Shore, CA · 16475 days ago · 3 km deep · 98 km away
  28. 1.56km SSW of Salton City, CA · 16475 days ago · 1 km deep · 78 km away
  29. 2.110km NNE of Borrego Springs, CA · 16475 days ago · 13 km deep · 45 km away
  30. 2.46km SSW of Salton City, CA · 16475 days ago · 3 km deep · 80 km away
  31. 2.04km SSW of Salton City, CA · 16475 days ago · 5 km deep · 79 km away
  32. 1.76km SSW of Salton City, CA · 16474 days ago · 1 km deep · 79 km away
  33. 1.611km WSW of Anza, CA · 16474 days ago · 4 km deep · 0 km away
  34. 1.66km SSW of Salton City, CA · 16474 days ago · 1 km deep · 79 km away
  35. 2.02km ESE of Loma Linda, CA · 16474 days ago · 9 km deep · 73 km away
  36. 1.834km NNE of North Shore, CA · 16473 days ago · 5 km deep · 98 km away
  37. 1.54km SSE of San Juan Capistrano, CA · 16473 days ago · 12 km deep · 81 km away
  38. 1.76km S of Idyllwild, CA · 16472 days ago · 14 km deep · 21 km away
  39. 1.613km ESE of North Shore, CA · 16472 days ago · 8 km deep · 90 km away
  40. 1.76km SW of Salton City, CA · 16472 days ago · 4 km deep · 78 km away
  41. 2.07km SSW of Salton City, CA · 16472 days ago · 3 km deep · 80 km away
  42. 1.65km SSE of Murrieta, CA · 16472 days ago · 4 km deep · 39 km away
  43. 2.76km SSW of Salton City, CA · 16472 days ago · 3 km deep · 80 km away
  44. 1.66km S of Salton City, CA · 16471 days ago · 3 km deep · 81 km away
  45. 1.533km NNE of North Shore, CA · 16471 days ago · 4 km deep · 97 km away
  46. 1.534km NNE of North Shore, CA · 16471 days ago · 5 km deep · 97 km away
  47. 1.82km NE of Ocotillo Wells, CA · 16471 days ago · 9 km deep · 73 km away
  48. 1.734km NNE of North Shore, CA · 16471 days ago · 2 km deep · 98 km away
  49. 1.78km SSW of Salton City, CA · 16470 days ago · 3 km deep · 81 km away
  50. 2.01km SE of Murrieta, CA · 16470 days ago · 11 km deep · 40 km away
  51. 1.612km NE of Thousand Palms, CA · 16470 days ago · 5 km deep · 61 km away
  52. 1.68km ENE of Aguanga, CA · 16470 days ago · 5 km deep · 4 km away
  53. 2.27km SSW of Salton City, CA · 16470 days ago · 3 km deep · 80 km away
  54. 2.26km SSW of Salton City, CA · 16470 days ago · 4 km deep · 80 km away
  55. 2.57km SSW of Salton City, CA · 16470 days ago · 3 km deep · 80 km away
  56. 2.47km S of Salton City, CA · 16470 days ago · 3 km deep · 81 km away
  57. 1.76km SSW of Salton City, CA · 16470 days ago · 3 km deep · 80 km away
  58. 1.510km NE of Aguanga, CA · 16469 days ago · 3 km deep · 2 km away
  59. 2.519km N of Yucca Valley, CA · 16469 days ago · -1 km deep · 91 km away
  60. 2.06km NNE of Cabazon, CA · 16469 days ago · 6 km deep · 50 km away

The first 60 of 187.

Before

  1. 2.34km ESE of Highland, CA · 16481 days ago · 7 km deep · 77 km away
  2. 2.04km ESE of Highland, CA · 16481 days ago · 6 km deep · 76 km away
  3. 1.53km ESE of Highland, CA · 16482 days ago · 8 km deep · 78 km away
  4. 1.73km ESE of Highland, CA · 16482 days ago · 4 km deep · 78 km away
  5. 1.84km ESE of Highland, CA · 16482 days ago · 7 km deep · 77 km away
  6. 2.44km SE of Highland, CA · 16482 days ago · 8 km deep · 76 km away
  7. 1.715km N of Borrego Springs, CA · 16482 days ago · 3 km deep · 39 km away
  8. 1.64km ESE of Highland, CA · 16482 days ago · 7 km deep · 77 km away
  9. 2.014km N of Borrego Springs, CA · 16482 days ago · 3 km deep · 39 km away
  10. 1.73km ESE of Highland, CA · 16482 days ago · 6 km deep · 77 km away
  11. 2.410km NE of Aguanga, CA · 16482 days ago · 4 km deep · 2 km away
  12. 1.815km S of Salton City, CA · 16482 days ago · 12 km deep · 87 km away
  13. 1.735km NNE of North Shore, CA · 16482 days ago · 3 km deep · 98 km away
  14. 1.921km ESE of Anza, CA · 16482 days ago · 4 km deep · 29 km away
  15. 1.54km SSW of Salton City, CA · 16482 days ago · 5 km deep · 80 km away
  16. 1.80km NW of Beaumont, CA · 16482 days ago · 14 km deep · 51 km away
  17. 2.47km NNW of Anza, CA · 16483 days ago · 14 km deep · 14 km away
  18. 1.68km NE of Aguanga, CA · 16483 days ago · 4 km deep · 3 km away
  19. 1.825km NNW of Yucca Valley, CA · 16483 days ago · 4 km deep · 92 km away
  20. 1.75km S of Idyllwild, CA · 16483 days ago · 13 km deep · 21 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event ci521298. Read Wed, Sep 30, 2026, 7:39 PM UTC.