California earthquakes

M1.6 earthquake 11km WSW of Anza, CA

A magnitude 1.6 earthquake struck 11km WSW of Anza, CA on Thu, Jul 9, 1981, 3:02 AM PDT (10:02 UTC), 3 km (2 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 (mh), micro
Local time
UTC
1981-07-09 10:02:57 UTC
Depth
2.9 km (1.8 mi), shallow
Epicenter
33.506° N, 116.772° 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, 0.5 km in depth
Depth from
From location
Station coverage gap
79°
Stations used
18

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 189 in the 30 days before it.

After

  1. 1.95km SW of Salton City, CA · 16519 days ago · 2 km deep · 77 km away
  2. 1.823km ESE of Anza, CA · 16519 days ago · 8 km deep · 30 km away
  3. 1.518km N of Borrego Springs, CA · 16519 days ago · 12 km deep · 37 km away
  4. 3.04km WNW of Lake Henshaw, CA · 16518 days ago · 8 km deep · 28 km away
  5. 1.634km NNE of North Shore, CA · 16518 days ago · 3 km deep · 98 km away
  6. 1.719km SSW of Ocotillo Wells, CA · 16518 days ago · 2 km deep · 77 km away
  7. 2.66km SSW of Salton City, CA · 16518 days ago · 5 km deep · 79 km away
  8. 2.46km SSW of Salton City, CA · 16518 days ago · 3 km deep · 78 km away
  9. 1.95km SSW of Salton City, CA · 16518 days ago · 3 km deep · 79 km away
  10. 1.66km SSW of Salton City, CA · 16517 days ago · 3 km deep · 80 km away
  11. 1.522km NNW of Yucca Valley, CA · 16517 days ago · 2 km deep · 92 km away
  12. 1.76km SSW of Salton City, CA · 16517 days ago · 4 km deep · 79 km away
  13. 1.66km SSW of Salton City, CA · 16517 days ago · 4 km deep · 79 km away
  14. 1.54km S of Salton City, CA · 16517 days ago · 6 km deep · 80 km away
  15. 1.69km SW of Corona, CA · 16517 days ago · 7 km deep · 88 km away
  16. 2.08km E of Borrego Springs, CA · 16516 days ago · 12 km deep · 54 km away
  17. 1.934km NNE of North Shore, CA · 16515 days ago · 3 km deep · 98 km away
  18. 1.66km WSW of Salton City, CA · 16515 days ago · 2 km deep · 75 km away
  19. 2.46km WSW of Salton City, CA · 16515 days ago · 4 km deep · 75 km away
  20. 1.58km W of Salton City, CA · 16515 days ago · 4 km deep · 72 km away
  21. 1.77km WSW of Salton City, CA · 16515 days ago · 2 km deep · 74 km away
  22. 1.86km WSW of Salton City, CA · 16515 days ago · 2 km deep · 75 km away
  23. 1.57km N of Ocotillo Wells, CA · 16515 days ago · 8 km deep · 67 km away
  24. 1.624km ESE of Anza, CA · 16514 days ago · 11 km deep · 31 km away
  25. 1.52km NW of Cabazon, CA · 16514 days ago · 16 km deep · 47 km away
  26. 1.734km NNE of North Shore, CA · 16513 days ago · 6 km deep · 97 km away
  27. 1.534km NNE of North Shore, CA · 16513 days ago · 3 km deep · 98 km away
  28. 1.912km ENE of Thermal, CA · 16511 days ago · 4 km deep · 72 km away
  29. 1.58km NE of Borrego Springs, CA · 16510 days ago · 3 km deep · 48 km away
  30. 1.59km SSW of Corona, CA · 16510 days ago · 3 km deep · 85 km away
  31. 1.57km SW of Salton City, CA · 16510 days ago · 3 km deep · 77 km away
  32. 3.11km SW of Anza, CA · 16510 days ago · 7 km deep · 10 km away
  33. 1.69km NE of Aguanga, CA · 16509 days ago · 3 km deep · 2 km away
  34. 2.012km ENE of Coachella, CA · 16509 days ago · 3 km deep · 70 km away
  35. 1.56km SSW of Salton City, CA · 16509 days ago · 4 km deep · 80 km away
  36. 2.811km ENE of Coachella, CA · 16509 days ago · 2 km deep · 70 km away
  37. 1.511km NNW of Borrego Springs, CA · 16508 days ago · 3 km deep · 38 km away
  38. 1.72km ESE of Loma Linda, CA · 16508 days ago · 16 km deep · 74 km away
  39. 2.46km S of Salton City, CA · 16507 days ago · 6 km deep · 80 km away
  40. 1.631km SE of Twentynine Palms, CA · 16507 days ago · 4 km deep · 96 km away
  41. 1.511km NE of Aguanga, CA · 16506 days ago · 3 km deep · 1 km away
  42. 1.710km ENE of Borrego Springs, CA · 16506 days ago · 9 km deep · 51 km away
  43. 2.218km ESE of Julian, CA · 16506 days ago · 7 km deep · 61 km away
  44. 2.010km NE of Aguanga, CA · 16505 days ago · 4 km deep · 1 km away
  45. 1.511km NW of Julian, CA · 16505 days ago · 17 km deep · 40 km away
  46. 1.76km S of Salton City, CA · 16505 days ago · 5 km deep · 81 km away
  47. 1.511km NE of Aguanga, CA · 16505 days ago · 2 km deep · 1 km away
  48. 1.58km ENE of Indio, CA · 16504 days ago · 4 km deep · 64 km away
  49. 1.86km WSW of Salton City, CA · 16504 days ago · 2 km deep · 75 km away
  50. 2.410km NE of Aguanga, CA · 16504 days ago · 0 km deep · 2 km away
  51. 1.610km NE of Aguanga, CA · 16504 days ago · 1 km deep · 1 km away
  52. 1.710km NNE of Borrego Springs, CA · 16503 days ago · 12 km deep · 43 km away
  53. 2.68km ENE of Aguanga, CA · 16503 days ago · 4 km deep · 4 km away
  54. 2.07km NE of Aguanga, CA · 16503 days ago · 0 km deep · 5 km away
  55. 1.65km NE of Anza, CA · 16502 days ago · 13 km deep · 16 km away
  56. 1.65km NE of Anza, CA · 16502 days ago · 13 km deep · 16 km away
  57. 2.012km SSW of Idyllwild, CA · 16501 days ago · 12 km deep · 15 km away
  58. 1.67km SSW of Salton City, CA · 16501 days ago · 3 km deep · 78 km away
  59. 1.618km N of Borrego Springs, CA · 16500 days ago · 11 km deep · 37 km away
  60. 2.811km SW of Morongo Valley, CA · 16500 days ago · 14 km deep · 53 km away

The first 60 of 187.

Before

  1. 1.517km SW of Ocotillo Wells, CA · 16519 days ago · 6 km deep · 69 km away
  2. 1.617km SW of Ocotillo Wells, CA · 16519 days ago · 5 km deep · 69 km away
  3. 1.66km S of Salton City, CA · 16519 days ago · 5 km deep · 81 km away
  4. 1.89km NE of Aguanga, CA · 16520 days ago · 4 km deep · 2 km away
  5. 1.69km NNE of Ocotillo Wells, CA · 16520 days ago · 2 km deep · 71 km away
  6. 1.76km SSW of Salton City, CA · 16520 days ago · 4 km deep · 79 km away
  7. 2.06km NW of Fontana, CA · 16520 days ago · 14 km deep · 97 km away
  8. 1.56km SSW of Salton City, CA · 16520 days ago · 4 km deep · 79 km away
  9. 2.111km NE of Aguanga, CA · 16520 days ago · 4 km deep · 0 km away
  10. 1.815km ESE of Anza, CA · 16520 days ago · 13 km deep · 23 km away
  11. 2.721km NE of Pine Valley, CA · 16521 days ago · 15 km deep · 73 km away
  12. 1.911km NW of Ocotillo Wells, CA · 16521 days ago · 7 km deep · 61 km away
  13. 1.75km SSW of Salton City, CA · 16522 days ago · 5 km deep · 79 km away
  14. 1.75km SSW of Salton City, CA · 16522 days ago · 3 km deep · 78 km away
  15. 1.57km S of Salton City, CA · 16522 days ago · 4 km deep · 81 km away
  16. 2.010km ENE of Aguanga, CA · 16522 days ago · 4 km deep · 2 km away
  17. 1.96km N of Big Bear City, CA · 16523 days ago · 4 km deep · 90 km away
  18. 1.711km WSW of Anza, CA · 16523 days ago · 4 km deep · 1 km away
  19. 2.15km N of Big Bear City, CA · 16523 days ago · 4 km deep · 89 km away
  20. 1.68km NE of Borrego Springs, CA · 16523 days ago · 13 km deep · 47 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event ci519065. Read Wed, Sep 30, 2026, 1:43 AM UTC.