California earthquakes

M1.8 earthquake 4km SW of Redlands, CA

A magnitude 1.8 earthquake struck 4km SW of Redlands, CA on Sun, Apr 2, 1978, 9:35 AM PST (17:35 UTC), 15 km (9 mi) below the surface.

A larger quake followed: M1.9 14km E of Desert Hot Springs, CA. This one was a foreshock.

Redlands forecastMore in California

Map

Where this earthquake was located, with the others nearby. Select one for its page.

Open the live map with earthquakes

The earthquake

Magnitude
1.8 (mc), micro
Local time
UTC
1978-04-02 17:35:18 UTC
Depth
14.6 km (9.1 mi), shallow
Epicenter
34.029° N, 117.206° 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, 1.1 km in depth
Depth from
From location
Station coverage gap
77°
Stations used
15

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 161 in the 60 days after this one and 0 in the 30 days before it.

After

  1. 1.76km NNW of Big Bear Lake, CA · 17690 days ago · 2 km deep · 39 km away
  2. 1.713km E of Desert Hot Springs, CA · 17690 days ago · 6 km deep · 78 km away
  3. 1.914km E of Desert Hot Springs, CA · 17689 days ago · 4 km deep · 79 km away
  4. 1.613km E of Desert Hot Springs, CA · 17689 days ago · 5 km deep · 78 km away
  5. 2.211km N of Banning, CA · 17689 days ago · 20 km deep · 30 km away
  6. 3.02km E of Corona, CA · 17689 days ago · 4 km deep · 36 km away
  7. 2.018km ESE of Anza, CA · 17689 days ago · 12 km deep · 89 km away
  8. 1.87km WSW of Anza, CA · 17688 days ago · 6 km deep · 70 km away
  9. 1.95km SW of Morongo Valley, CA · 17688 days ago · 11 km deep · 54 km away
  10. 1.612km N of Cabazon, CA · 17688 days ago · 20 km deep · 40 km away
  11. 2.014km S of Newport Beach, CA · 17688 days ago · 6 km deep · 90 km away
  12. 2.39km NE of Cabazon, CA · 17688 days ago · 13 km deep · 46 km away
  13. 1.821km ESE of Anza, CA · 17688 days ago · 13 km deep · 92 km away
  14. 1.73km N of Palomar Observatory, CA · 17687 days ago · 10 km deep · 78 km away
  15. 1.711km N of Victorville, CA · 17687 days ago · 1 km deep · 67 km away
  16. 2.216km NE of Thousand Palms, CA · 17686 days ago · 6 km deep · 87 km away
  17. 1.610km ENE of Thousand Palms, CA · 17685 days ago · 3 km deep · 85 km away
  18. 1.823km N of Yucca Valley, CA · 17685 days ago · 5 km deep · 78 km away
  19. 2.49km NE of Cabazon, CA · 17685 days ago · 18 km deep · 45 km away
  20. 1.96km NW of Cabazon, CA · 17685 days ago · 12 km deep · 36 km away
  21. 1.89km ENE of Aguanga, CA · 17683 days ago · 9 km deep · 72 km away
  22. 2.04km NNW of Beaumont, CA · 17683 days ago · 17 km deep · 21 km away
  23. 2.00km SSW of Baldwin Park, CA · 17683 days ago · 14 km deep · 70 km away
  24. 3.37km NNE of Beaumont, CA · 17682 days ago · 20 km deep · 26 km away
  25. 2.08km N of Fontana, CA · 17682 days ago · 9 km deep · 29 km away
  26. 2.19km WSW of Anza, CA · 17681 days ago · 6 km deep · 71 km away
  27. 2.711km N of La Verne, CA · 17681 days ago · 10 km deep · 55 km away
  28. 1.55km NE of Running Springs, CA · 17681 days ago · 4 km deep · 27 km away
  29. 1.84km NNE of Running Springs, CA · 17681 days ago · 3 km deep · 26 km away
  30. 1.67km WNW of Desert Hot Springs, CA · 17681 days ago · 8 km deep · 58 km away
  31. 2.33km NNE of Running Springs, CA · 17681 days ago · 4 km deep · 25 km away
  32. 1.53km ENE of Calimesa, CA · 17680 days ago · 20 km deep · 18 km away
  33. 1.78km N of Valle Vista, CA · 17680 days ago · 11 km deep · 38 km away
  34. 1.84km NNE of Running Springs, CA · 17680 days ago · 3 km deep · 26 km away
  35. 1.74km NNE of Running Springs, CA · 17679 days ago · 3 km deep · 26 km away
  36. 3.38km ENE of Villa Park, CA · 17679 days ago · 9 km deep · 53 km away
  37. 3.717km NW of Yucca Valley, CA · 17679 days ago · 9 km deep · 63 km away
  38. 1.618km NW of Yucca Valley, CA · 17679 days ago · 9 km deep · 64 km away
  39. 2.018km NW of Yucca Valley, CA · 17679 days ago · 7 km deep · 63 km away
  40. 2.218km NW of Yucca Valley, CA · 17679 days ago · 8 km deep · 64 km away
  41. 2.118km NW of Yucca Valley, CA · 17679 days ago · 8 km deep · 64 km away
  42. 1.72km N of Fontana, CA · 17679 days ago · 5 km deep · 26 km away
  43. 1.68km WSW of Anza, CA · 17679 days ago · 9 km deep · 70 km away
  44. 1.618km NW of Yucca Valley, CA · 17679 days ago · 8 km deep · 63 km away
  45. 1.87km NW of Morongo Valley, CA · 17679 days ago · 9 km deep · 53 km away
  46. 1.718km NW of Yucca Valley, CA · 17679 days ago · 7 km deep · 63 km away
  47. 1.620km E of Anza, CA · 17679 days ago · 9 km deep · 88 km away
  48. 1.717km NW of Yucca Valley, CA · 17678 days ago · 8 km deep · 63 km away
  49. 2.117km NW of Yucca Valley, CA · 17678 days ago · 7 km deep · 63 km away
  50. 1.718km NW of Yucca Valley, CA · 17678 days ago · 8 km deep · 63 km away
  51. 1.818km NW of Yucca Valley, CA · 17678 days ago · 8 km deep · 63 km away
  52. 1.85km SSE of Morongo Valley, CA · 17678 days ago · 8 km deep · 59 km away
  53. 1.612km N of Cabazon, CA · 17678 days ago · 15 km deep · 39 km away
  54. 1.68km WSW of Anza, CA · 17677 days ago · 6 km deep · 70 km away
  55. 1.517km NW of Yucca Valley, CA · 17677 days ago · 8 km deep · 63 km away
  56. 1.918km SSE of Joshua Tree, CA · 17677 days ago · 0 km deep · 89 km away
  57. 1.818km SSE of Joshua Tree, CA · 17677 days ago · 0 km deep · 89 km away
  58. 1.921km ESE of Anza, CA · 17677 days ago · 13 km deep · 92 km away
  59. 1.68km SE of Running Springs, CA · 17676 days ago · 11 km deep · 20 km away
  60. 1.518km ESE of Anza, CA · 17676 days ago · 18 km deep · 87 km away

The first 60 of 161.

Earthquakes todayCalifornia earthquakesLive radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event ci3338536. Read Tue, Sep 22, 2026, 10:31 PM UTC.