California earthquakes

M1.8 earthquake 12km W of Anza, CA

A magnitude 1.8 earthquake struck 12km W of Anza, CA on Fri, Nov 20, 1987, 4:44 AM PST (12:44 UTC), 3 km (2 mi) below the surface.

A larger quake followed: M4.3 20km SSE of Salton City, 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
1.8 (Mc), micro
Magnitude from
Southern California Seismic Network
Local time
UTC
1987-11-20 12:44:27 UTC
Depth
3.0 km (1.9 mi), shallow
Epicenter
33.554° N, 116.805° 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.

Depth from
From location
Station coverage gap
87°
Stations used
0

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 194 in the 60 days after this one and 184 in the 30 days before it.

After

  1. 1.812km WSW of Morongo Valley, CA · 14199 days ago · 9 km deep · 52 km away
  2. 2.213km SE of Anza, CA · 14199 days ago · 12 km deep · 23 km away
  3. 2.116km NNW of Borrego Springs, CA · 14199 days ago · 10 km deep · 40 km away
  4. 2.122km SSW of La Quinta, CA · 14198 days ago · 6 km deep · 36 km away
  5. 1.54km SSE of Running Springs, CA · 14198 days ago · 3 km deep · 74 km away
  6. 2.08km WSW of Morongo Valley, CA · 14198 days ago · 10 km deep · 54 km away
  7. 2.114km N of Borrego Springs, CA · 14198 days ago · 4 km deep · 46 km away
  8. 2.221km N of Joshua Tree, CA · 14198 days ago · 5 km deep · 96 km away
  9. 1.714km SE of Anza, CA · 14197 days ago · 12 km deep · 24 km away
  10. 2.11km WNW of Loma Linda, CA · 14197 days ago · 16 km deep · 70 km away
  11. 2.010km SSE of Idyllwild, CA · 14197 days ago · 15 km deep · 15 km away
  12. 1.96km S of Redlands, CA · 14197 days ago · 14 km deep · 61 km away
  13. 1.77km SSW of Idyllwild, CA · 14197 days ago · 15 km deep · 15 km away
  14. 1.73km N of Colton, CA · 14197 days ago · 17 km deep · 77 km away
  15. 1.67km NE of Moreno Valley, CA · 14197 days ago · 18 km deep · 57 km away
  16. 1.913km SE of Anza, CA · 14197 days ago · 13 km deep · 23 km away
  17. 1.89km N of Yucca Valley, CA · 14197 days ago · 5 km deep · 80 km away
  18. 1.910km WSW of Morongo Valley, CA · 14196 days ago · 10 km deep · 53 km away
  19. 1.811km SSE of Corona, CA · 14196 days ago · 5 km deep · 72 km away
  20. 1.94km WNW of Borrego Springs, CA · 14196 days ago · 3 km deep · 48 km away
  21. 1.824km NNW of Borrego Springs, CA · 14196 days ago · 11 km deep · 35 km away
  22. 1.77km E of Julian, CA · 14196 days ago · 13 km deep · 60 km away
  23. 1.819km SSE of Joshua Tree, CA · 14196 days ago · 7 km deep · 69 km away
  24. 2.123km ESE of Anza, CA · 14196 days ago · 14 km deep · 34 km away
  25. 1.66km NW of Mira Loma, CA · 14196 days ago · 4 km deep · 87 km away
  26. 1.714km SE of Salton City, CA · 14195 days ago · 6 km deep · 97 km away
  27. 2.213km S of Salton City, CA · 14195 days ago · 5 km deep · 88 km away
  28. 2.06km NW of San Jacinto, CA · 14195 days ago · 14 km deep · 35 km away
  29. 4.320km SSE of Salton City, CA · 14195 days ago · 1 km deep · 98 km away
  30. 2.522km ESE of Ocotillo Wells, CA · 14195 days ago · 1 km deep · 100 km away
  31. 2.722km ESE of Ocotillo Wells, CA · 14195 days ago · 1 km deep · 99 km away
  32. 2.921km ESE of Ocotillo Wells, CA · 14195 days ago · 3 km deep · 98 km away
  33. 3.721km ESE of Ocotillo Wells, CA · 14195 days ago · 3 km deep · 98 km away
  34. 3.422km ESE of Ocotillo Wells, CA · 14195 days ago · 0 km deep · 99 km away
  35. 3.121km ESE of Ocotillo Wells, CA · 14195 days ago · 3 km deep · 98 km away
  36. 2.622km ESE of Ocotillo Wells, CA · 14195 days ago · 6 km deep · 99 km away
  37. 2.722km ESE of Ocotillo Wells, CA · 14195 days ago · 3 km deep · 99 km away
  38. 2.417km E of Ocotillo Wells, CA · 14195 days ago · 5 km deep · 93 km away
  39. 2.219km N of Joshua Tree, CA · 14195 days ago · 0 km deep · 94 km away
  40. 2.722km ESE of Ocotillo Wells, CA · 14195 days ago · 3 km deep · 99 km away
  41. 3.37km SE of Valle Vista, CA · 14194 days ago · 15 km deep · 18 km away
  42. 3.09km ENE of Anza, CA · 14194 days ago · 6 km deep · 21 km away
  43. 2.47km SE of Valle Vista, CA · 14194 days ago · 16 km deep · 18 km away
  44. 2.37km SE of Valle Vista, CA · 14194 days ago · 15 km deep · 18 km away
  45. 2.921km ESE of Ocotillo Wells, CA · 14194 days ago · 1 km deep · 98 km away
  46. 2.822km ESE of Ocotillo Wells, CA · 14194 days ago · 2 km deep · 100 km away
  47. 2.29km SSW of Borrego Springs, CA · 14194 days ago · 9 km deep · 56 km away
  48. 2.523km ESE of Ocotillo Wells, CA · 14194 days ago · 3 km deep · 100 km away
  49. 2.522km ESE of Ocotillo Wells, CA · 14194 days ago · 3 km deep · 99 km away
  50. 2.17km SE of Valle Vista, CA · 14194 days ago · 17 km deep · 18 km away
  51. 2.821km ESE of Ocotillo Wells, CA · 14194 days ago · 3 km deep · 99 km away
  52. 2.422km ESE of Ocotillo Wells, CA · 14194 days ago · 2 km deep · 99 km away
  53. 3.321km ESE of Ocotillo Wells, CA · 14194 days ago · 2 km deep · 98 km away
  54. 3.320km ESE of Ocotillo Wells, CA · 14194 days ago · 3 km deep · 97 km away
  55. 2.320km ESE of Ocotillo Wells, CA · 14194 days ago · 2 km deep · 97 km away
  56. 3.220km ESE of Ocotillo Wells, CA · 14194 days ago · 2 km deep · 97 km away
  57. 3.521km ESE of Ocotillo Wells, CA · 14194 days ago · 2 km deep · 98 km away
  58. 2.121km ESE of Ocotillo Wells, CA · 14194 days ago · 2 km deep · 99 km away
  59. 1.98km SE of Borrego Springs, CA · 14194 days ago · 12 km deep · 60 km away
  60. 2.06km S of Idyllwild, CA · 14194 days ago · 17 km deep · 17 km away

The first 60 of 194.

Before

  1. 1.74km SSE of Running Springs, CA · 14199 days ago · -1 km deep · 73 km away
  2. 1.75km SE of Running Springs, CA · 14199 days ago · 7 km deep · 74 km away
  3. 2.04km SE of Lake Arrowhead, CA · 14199 days ago · 8 km deep · 81 km away
  4. 1.54km SSE of Running Springs, CA · 14200 days ago · 3 km deep · 74 km away
  5. 1.96km S of Calimesa, CA · 14200 days ago · 7 km deep · 49 km away
  6. 2.54km SE of Running Springs, CA · 14200 days ago · 4 km deep · 74 km away
  7. 1.65km SE of Running Springs, CA · 14200 days ago · 2 km deep · 73 km away
  8. 2.619km N of Joshua Tree, CA · 14200 days ago · -1 km deep · 94 km away
  9. 1.85km E of Valle Vista, CA · 14201 days ago · 16 km deep · 21 km away
  10. 2.19km NNE of Borrego Springs, CA · 14201 days ago · 10 km deep · 50 km away
  11. 2.69km SSE of Lucerne Valley, CA · 14201 days ago · 10 km deep · 91 km away
  12. 2.24km SE of Running Springs, CA · 14201 days ago · 4 km deep · 74 km away
  13. 1.85km SSE of Running Springs, CA · 14201 days ago · 1 km deep · 73 km away
  14. 1.66km SE of Running Springs, CA · 14201 days ago · 0 km deep · 73 km away
  15. 1.916km NNW of Aguanga, CA · 14201 days ago · 11 km deep · 12 km away
  16. 1.74km SSE of Running Springs, CA · 14201 days ago · 0 km deep · 74 km away
  17. 2.123km SSW of La Quinta, CA · 14201 days ago · 15 km deep · 36 km away
  18. 2.34km SE of Running Springs, CA · 14201 days ago · 1 km deep · 74 km away
  19. 2.28km E of Borrego Springs, CA · 14202 days ago · 10 km deep · 58 km away
  20. 2.18km E of Borrego Springs, CA · 14202 days ago · 12 km deep · 58 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event ci735441. Read Mon, Oct 5, 2026, 7:35 AM UTC.