M1.8 earthquake 20km ESE of Anza, CA

Magnitude

1.8 (mc), micro

Local time

Thu, Mar 23, 1978, 3:30 PM PST

UTC

1978-03-23 23:30:42 UTC

Depth

13.2 km (8.2 mi), shallow

Epicenter

33.484° N, 116.473° W

Region

California

Tsunami flag

No

Status

Reviewed by a seismologist

Location uncertainty

About 0.5 km horizontally, 0.7 km in depth

Depth from

From location

Station coverage gap

76°

Stations used

13

• Anza, CaliforniaPopulation 3,014. Forecast20 kmESE
• La Quinta, CaliforniaPopulation 40,476. Forecast25 kmSW
• Temecula, CaliforniaPopulation 110,003. Forecast63 kmE
• San Diego, CaliforniaPopulation 1,404,452. Forecast107 kmNE

After

1. 1.62km SSE of Loma Linda, CASun, Apr 16, 12:46 AM PST · 17692 days ago · 7 km deep · 94 km away
2. 1.710km SE of Anza, CASun, Apr 16, 12:47 AM PST · 17692 days ago · 10 km deep · 12 km away
3. 1.522km WSW of Westmorland, CASun, Apr 16, 8:52 AM PST · 17691 days ago · 10 km deep · 84 km away
4. 2.28km E of North Shore, CASun, Apr 16, 1:54 PM PST · 17691 days ago · 5 km deep · 58 km away
5. 2.58km E of North Shore, CASun, Apr 16, 1:55 PM PST · 17691 days ago · 4 km deep · 58 km away
6. 2.68km E of North Shore, CASun, Apr 16, 2:03 PM PST · 17691 days ago · 9 km deep · 58 km away
7. 1.88km E of North Shore, CASun, Apr 16, 4:38 PM PST · 17691 days ago · 6 km deep · 58 km away
8. 1.79km WNW of Twentynine Palms, CASun, Apr 16, 6:34 PM PST · 17691 days ago · 9 km deep · 83 km away
9. 1.79km E of North Shore, CASun, Apr 16, 9:49 PM PST · 17691 days ago · 9 km deep · 59 km away
10. 2.510km SW of Morongo Valley, CASun, Apr 16, 11:36 PM PST · 17691 days ago · 9 km deep · 59 km away
11. 1.914km ESE of Anza, CAMon, Apr 17, 5:32 AM PST · 17690 days ago · 13 km deep · 7 km away
12. 1.715km ESE of Anza, CAMon, Apr 17, 5:33 AM PST · 17690 days ago · 14 km deep · 5 km away
13. 1.77km SW of Big Bear Lake, CAMon, Apr 17, 12:31 PM PST · 17690 days ago · 12 km deep · 91 km away
14. 1.76km NNW of Big Bear Lake, CAMon, Apr 17, 3:34 PM PST · 17690 days ago · 2 km deep · 99 km away
15. 2.78km E of North Shore, CAMon, Apr 17, 8:21 PM PST · 17690 days ago · 9 km deep · 58 km away
16. 2.58km E of North Shore, CAMon, Apr 17, 8:36 PM PST · 17690 days ago · 11 km deep · 58 km away
17. 1.713km E of Desert Hot Springs, CATue, Apr 18, 2:00 AM PST · 17689 days ago · 6 km deep · 53 km away
18. 1.914km E of Desert Hot Springs, CATue, Apr 18, 9:19 AM PST · 17689 days ago · 4 km deep · 54 km away
19. 1.613km E of Desert Hot Springs, CATue, Apr 18, 10:15 AM PST · 17689 days ago · 5 km deep · 53 km away
20. 2.211km N of Banning, CATue, Apr 18, 1:36 PM PST · 17689 days ago · 20 km deep · 71 km away
21. 1.727km SSW of Ocotillo Wells, CATue, Apr 18, 11:53 PM PST · 17689 days ago · 7 km deep · 65 km away
22. 2.018km ESE of Anza, CAWed, Apr 19, 2:25 AM PST · 17688 days ago · 12 km deep · 2 km away
23. 1.87km WSW of Anza, CAWed, Apr 19, 4:51 AM PST · 17688 days ago · 6 km deep · 26 km away
24. 1.95km SW of Morongo Valley, CAWed, Apr 19, 5:36 AM PST · 17688 days ago · 11 km deep · 61 km away
25. 1.612km N of Cabazon, CAWed, Apr 19, 7:01 AM PST · 17688 days ago · 20 km deep · 66 km away
26. 2.39km NE of Cabazon, CAWed, Apr 19, 11:55 AM PST · 17688 days ago · 13 km deep · 58 km away
27. 1.821km ESE of Anza, CAWed, Apr 19, 5:01 PM PST · 17688 days ago · 13 km deep · 1 km away
28. 2.114km NE of Thermal, CAWed, Apr 19, 11:36 PM PST · 17688 days ago · 6 km deep · 49 km away
29. 1.810km W of Niland, CAThu, Apr 20, 4:52 AM PST · 17687 days ago · 4 km deep · 83 km away
30. 1.73km N of Palomar Observatory, CAThu, Apr 20, 5:37 AM PST · 17687 days ago · 10 km deep · 38 km away
31. 2.510km NNE of Ocotillo Wells, CAFri, Apr 21, 12:18 AM PST · 17687 days ago · 13 km deep · 46 km away
32. 2.014km NE of Thermal, CAFri, Apr 21, 12:47 AM PST · 17687 days ago · 5 km deep · 49 km away
33. 2.216km NE of Thousand Palms, CAFri, Apr 21, 2:53 PM PST · 17686 days ago · 6 km deep · 53 km away
34. 1.910km W of Niland, CAFri, Apr 21, 11:46 PM PST · 17686 days ago · 3 km deep · 83 km away
35. 1.610km ENE of Thousand Palms, CASat, Apr 22, 1:02 PM PST · 17685 days ago · 3 km deep · 45 km away
36. 1.823km N of Yucca Valley, CASat, Apr 22, 9:21 PM PST · 17685 days ago · 5 km deep · 93 km away
37. 2.49km NE of Cabazon, CASat, Apr 22, 10:44 PM PST · 17685 days ago · 18 km deep · 60 km away
38. 1.96km NW of Cabazon, CASun, Apr 23, 1:18 AM PST · 17685 days ago · 12 km deep · 62 km away
39. 1.56km NE of Westmorland, CASun, Apr 23, 9:04 AM PST · 17684 days ago · 11 km deep · 94 km away
40. 1.821km ENE of Coachella, CASun, Apr 23, 12:42 PM PST · 17684 days ago · 6 km deep · 56 km away
41. 2.037km NW of Desert Center, CAMon, Apr 24, 1:35 AM PST · 17683 days ago · 1 km deep · 88 km away
42. 1.97km E of Westmorland, CAMon, Apr 24, 4:05 AM PST · 17683 days ago · 9 km deep · 99 km away
43. 1.89km ENE of Aguanga, CAMon, Apr 24, 6:24 AM PST · 17683 days ago · 9 km deep · 28 km away
44. 2.04km NNW of Beaumont, CAMon, Apr 24, 6:31 AM PST · 17683 days ago · 17 km deep · 72 km away
45. 2.023km SW of Ocotillo Wells, CAMon, Apr 24, 1:25 PM PST · 17683 days ago · 6 km deep · 55 km away
46. 1.55km WNW of Brawley, CAMon, Apr 24, 2:49 PM PST · 17683 days ago · 7 km deep · 100 km away
47. 2.25km WNW of Brawley, CAMon, Apr 24, 8:58 PM PST · 17683 days ago · 10 km deep · 99 km away
48. 1.95km SE of Westmorland, CAMon, Apr 24, 9:13 PM PST · 17683 days ago · 10 km deep · 98 km away
49. 1.53km SE of Westmorland, CATue, Apr 25, 2:59 AM PST · 17682 days ago · 10 km deep · 97 km away
50. 1.75km SE of Westmorland, CATue, Apr 25, 10:44 AM PST · 17682 days ago · 10 km deep · 98 km away
51. 3.37km NNE of Beaumont, CATue, Apr 25, 2:06 PM PST · 17682 days ago · 20 km deep · 70 km away
52. 1.75km WNW of Brawley, CATue, Apr 25, 10:25 PM PST · 17682 days ago · 10 km deep · 99 km away
53. 1.712km NNW of Borrego Springs, CAWed, Apr 26, 12:00 AM PST · 17682 days ago · 12 km deep · 15 km away
54. 1.74km SE of Westmorland, CAWed, Apr 26, 12:17 AM PST · 17682 days ago · 10 km deep · 97 km away
55. 2.19km WSW of Anza, CAWed, Apr 26, 6:40 AM PST · 17681 days ago · 6 km deep · 26 km away
56. 2.35km SE of Westmorland, CAThu, Apr 27, 12:28 AM PST · 17681 days ago · 10 km deep · 98 km away
57. 1.67km WNW of Desert Hot Springs, CAThu, Apr 27, 2:30 AM PST · 17680 days ago · 8 km deep · 55 km away
58. 1.53km ENE of Calimesa, CAThu, Apr 27, 3:22 AM PST · 17680 days ago · 20 km deep · 77 km away
59. 1.65km SE of Westmorland, CAThu, Apr 27, 4:40 AM PST · 17680 days ago · 9 km deep · 98 km away
60. 1.78km N of Valle Vista, CAThu, Apr 27, 5:01 AM PST · 17680 days ago · 11 km deep · 53 km away

The first 60 of 177.

From the USGS Earthquake Hazards Program and its partner networks, event ci3338308. Read Tue, Sep 22, 2026, 8:51 PM UTC.