M1.7 earthquake 11km SE of Anza, CA

Magnitude

1.7 (Mc), micro

Magnitude from

Southern California Seismic Network

Local time

Sat, Oct 21, 1978, 6:46 AM PDT

UTC

1978-10-21 13:46:16 UTC

Depth

14.6 km (9.1 mi), shallow

Epicenter

33.480° N, 116.597° W

Region

California

Tsunami flag

No

Status

Reviewed by a seismologist

Location uncertainty

About 0.6 km horizontally, 0.9 km in depth

Depth from

From location

Station coverage gap

58°

Stations used

23

• Anza, CaliforniaPopulation 3,014. Forecast11 kmSE
• La Quinta, CaliforniaPopulation 40,476. Forecast33 kmSW
• Temecula, CaliforniaPopulation 110,003. Forecast51 kmE
• San Diego, CaliforniaPopulation 1,404,452. Forecast100 kmNNE

After

1. 1.722km ENE of Pine Valley, CASat, Oct 21, 4:39 PM PDT · 17513 days ago · 6 km deep · 66 km away
2. 1.714km NW of Twentynine Palms, CASat, Oct 21, 8:26 PM PDT · 17513 days ago · 10 km deep · 91 km away
3. 1.826km WNW of Desert Center, CASun, Oct 22, 1:59 AM PDT · 17512 days ago · 5 km deep · 92 km away
4. 2.525km NNW of Joshua Tree, CASun, Oct 22, 8:27 AM PDT · 17512 days ago · 5 km deep · 97 km away
5. 1.914km NW of Ocotillo, CASun, Oct 22, 1:59 PM PDT · 17512 days ago · 7 km deep · 86 km away
6. 1.713km ENE of Borrego Springs, CASun, Oct 22, 5:47 PM PDT · 17512 days ago · 7 km deep · 37 km away
7. 1.623km ENE of Coachella, CASun, Oct 22, 8:01 PM PDT · 17512 days ago · 6 km deep · 68 km away
8. 1.527km WNW of Desert Center, CASun, Oct 22, 9:23 PM PDT · 17512 days ago · 6 km deep · 91 km away
9. 1.722km NE of Thermal, CAMon, Oct 23, 12:57 AM PDT · 17511 days ago · 4 km deep · 67 km away
10. 1.522km NE of Thermal, CAMon, Oct 23, 1:00 AM PDT · 17511 days ago · 4 km deep · 68 km away
11. 1.621km NE of Thermal, CAMon, Oct 23, 1:02 AM PDT · 17511 days ago · 6 km deep · 67 km away
12. 1.621km ENE of Coachella, CAMon, Oct 23, 1:02 AM PDT · 17511 days ago · 2 km deep · 66 km away
13. 1.921km NE of Thermal, CAMon, Oct 23, 1:03 AM PDT · 17511 days ago · 3 km deep · 66 km away
14. 1.99km NNE of Indio, CAMon, Oct 23, 1:56 AM PDT · 17511 days ago · 5 km deep · 52 km away
15. 1.817km ESE of Anza, CAMon, Oct 23, 6:04 AM PDT · 17511 days ago · 16 km deep · 8 km away
16. 2.33km WNW of Cabazon, CAMon, Oct 23, 6:47 AM PDT · 17511 days ago · 7 km deep · 54 km away
17. 1.54km NNE of Running Springs, CAMon, Oct 23, 12:47 PM PDT · 17511 days ago · 5 km deep · 96 km away
18. 1.86km NNE of Yucca Valley, CAMon, Oct 23, 7:34 PM PDT · 17511 days ago · 4 km deep · 78 km away
19. 1.78km WSW of Niland, CAMon, Oct 23, 11:59 PM PDT · 17510 days ago · 5 km deep · 98 km away
20. 2.010km SW of Idyllwild, CATue, Oct 24, 1:15 AM PDT · 17510 days ago · 17 km deep · 29 km away
21. 1.926km ENE of Pine Valley, CATue, Oct 24, 1:55 AM PDT · 17510 days ago · 10 km deep · 74 km away
22. 1.728km WNW of Desert Center, CATue, Oct 24, 12:56 PM PDT · 17510 days ago · 6 km deep · 90 km away
23. 2.027km WNW of Desert Center, CATue, Oct 24, 12:56 PM PDT · 17510 days ago · 1 km deep · 91 km away
24. 1.612km ENE of Borrego Springs, CATue, Oct 24, 3:53 PM PDT · 17510 days ago · 5 km deep · 38 km away
25. 1.813km S of Twentynine Palms, CATue, Oct 24, 7:15 PM PDT · 17510 days ago · 2 km deep · 78 km away
26. 1.518km N of Borrego Springs, CAWed, Oct 25, 2:00 AM PDT · 17509 days ago · 13 km deep · 20 km away
27. 3.014km NW of Twentynine Palms, CAWed, Oct 25, 5:38 AM PDT · 17509 days ago · 10 km deep · 92 km away
28. 1.515km ENE of Borrego Springs, CAWed, Oct 25, 10:08 AM PDT · 17509 days ago · 3 km deep · 40 km away
29. 1.63km NNE of Running Springs, CAWed, Oct 25, 7:06 PM PDT · 17509 days ago · 7 km deep · 95 km away
30. 1.84km NE of Running Springs, CAWed, Oct 25, 7:44 PM PDT · 17509 days ago · 2 km deep · 94 km away
31. 2.413km SE of Anza, CAThu, Oct 26, 3:14 AM PDT · 17508 days ago · 11 km deep · 2 km away
32. 2.54km ENE of Running Springs, CAThu, Oct 26, 3:15 AM PDT · 17508 days ago · 2 km deep · 94 km away
33. 2.14km ENE of Running Springs, CAThu, Oct 26, 3:17 AM PDT · 17508 days ago · 2 km deep · 93 km away
34. 2.311km WSW of Anza, CAThu, Oct 26, 5:52 AM PDT · 17508 days ago · 5 km deep · 18 km away
35. 2.79km NE of Running Springs, CAThu, Oct 26, 7:46 AM PDT · 17508 days ago · 6 km deep · 97 km away
36. 1.615km NW of Twentynine Palms, CAThu, Oct 26, 9:09 AM PDT · 17508 days ago · 12 km deep · 92 km away
37. 2.69km NE of Running Springs, CAThu, Oct 26, 10:43 AM PDT · 17508 days ago · 6 km deep · 97 km away
38. 1.68km NNE of Big Bear City, CAFri, Oct 27, 9:26 PM PDT · 17507 days ago · 11 km deep · 96 km away
39. 1.57km WNW of Twentynine Palms, CASat, Oct 28, 2:46 AM PDT · 17506 days ago · 8 km deep · 86 km away
40. 2.218km ESE of Anza, CASat, Oct 28, 12:15 PM PDT · 17506 days ago · 9 km deep · 11 km away
41. 1.723km ENE of Coachella, CASat, Oct 28, 3:05 PM PDT · 17506 days ago · 3 km deep · 68 km away
42. 1.73km E of Borrego Springs, CASat, Oct 28, 3:31 PM PDT · 17506 days ago · 13 km deep · 34 km away
43. 1.927km WNW of Desert Center, CASat, Oct 28, 7:08 PM PDT · 17506 days ago · 6 km deep · 91 km away
44. 1.614km S of Anza, CASat, Oct 28, 8:15 PM PDT · 17506 days ago · 14 km deep · 11 km away
45. 1.98km W of Big Bear Lake, CASat, Oct 28, 10:23 PM PDT · 17506 days ago · 10 km deep · 92 km away
46. 1.614km NW of Twentynine Palms, CASun, Oct 29, 6:04 AM PST · 17505 days ago · 10 km deep · 91 km away
47. 2.04km ENE of Ocotillo Wells, CASun, Oct 29, 6:53 AM PST · 17505 days ago · 12 km deep · 59 km away
48. 1.97km SSE of Idyllwild, CASun, Oct 29, 11:54 AM PST · 17505 days ago · 17 km deep · 24 km away
49. 1.910km WNW of Westmorland, CASun, Oct 29, 9:20 PM PST · 17505 days ago · 10 km deep · 93 km away
50. 2.510km NE of Ocotillo Wells, CASun, Oct 29, 9:29 PM PST · 17505 days ago · 10 km deep · 57 km away
51. 2.310km SSW of Idyllwild, CAMon, Oct 30, 1:12 AM PST · 17504 days ago · 14 km deep · 25 km away
52. 2.42km NW of Loma Linda, CAMon, Oct 30, 3:21 AM PST · 17504 days ago · 17 km deep · 90 km away
53. 2.04km SW of Big Bear Lake, CAMon, Oct 30, 11:05 AM PST · 17504 days ago · 6 km deep · 89 km away
54. 1.812km NNE of Borrego Springs, CAMon, Oct 30, 3:02 PM PST · 17504 days ago · 9 km deep · 29 km away
55. 1.94km SW of Big Bear Lake, CAMon, Oct 30, 4:06 PM PST · 17504 days ago · 8 km deep · 89 km away
56. 1.820km ESE of Anza, CAMon, Oct 30, 5:00 PM PST · 17504 days ago · 9 km deep · 13 km away
57. 1.67km SSE of Idyllwild, CAMon, Oct 30, 6:35 PM PST · 17504 days ago · 17 km deep · 24 km away
58. 2.07km NNE of Yucca Valley, CATue, Oct 31, 4:14 AM PST · 17503 days ago · 4 km deep · 79 km away
59. 1.615km N of Borrego Springs, CATue, Oct 31, 11:39 AM PST · 17503 days ago · 10 km deep · 21 km away
60. 2.211km ESE of Julian, CATue, Oct 31, 1:57 PM PST · 17503 days ago · 15 km deep · 51 km away

The first 60 of 172.

Before

1. 1.81km ESE of Loma Linda, CASat, Oct 21, 1:15 AM PDT · 17513 days ago · 6 km deep · 88 km away
2. 2.127km WNW of Desert Center, CAFri, Oct 20, 8:26 AM PDT · 17514 days ago · 3 km deep · 91 km away
3. 1.527km WNW of Desert Center, CAFri, Oct 20, 8:26 AM PDT · 17514 days ago · 6 km deep · 91 km away
4. 1.514km NW of Twentynine Palms, CAFri, Oct 20, 1:47 AM PDT · 17514 days ago · 10 km deep · 91 km away
5. 3.214km NW of Twentynine Palms, CAFri, Oct 20, 1:38 AM PDT · 17514 days ago · 7 km deep · 91 km away
6. 2.714km NW of Twentynine Palms, CAFri, Oct 20, 1:37 AM PDT · 17514 days ago · 8 km deep · 92 km away
7. 1.614km NW of Twentynine Palms, CAFri, Oct 20, 1:35 AM PDT · 17514 days ago · 11 km deep · 90 km away
8. 1.622km SW of Westmorland, CAThu, Oct 19, 4:39 AM PDT · 17515 days ago · 8 km deep · 98 km away
9. 1.810km SE of Anza, CAWed, Oct 18, 10:05 PM PDT · 17516 days ago · 6 km deep · 1 km away
10. 1.512km NE of Coachella, CAWed, Oct 18, 11:23 AM PDT · 17516 days ago · 6 km deep · 57 km away
11. 1.823km NE of Pine Valley, CAWed, Oct 18, 11:13 AM PDT · 17516 days ago · 6 km deep · 65 km away
12. 1.615km SE of Anza, CAWed, Oct 18, 8:44 AM PDT · 17516 days ago · 11 km deep · 4 km away
13. 1.814km NNW of Bombay Beach, CAWed, Oct 18, 5:52 AM PDT · 17516 days ago · 6 km deep · 75 km away
14. 1.76km SW of Salton City, CATue, Oct 17, 5:50 PM PDT · 17517 days ago · 6 km deep · 61 km away
15. 1.710km WNW of Garnet, CATue, Oct 17, 4:25 PM PDT · 17517 days ago · 17 km deep · 52 km away
16. 1.97km SE of Valle Vista, CATue, Oct 17, 7:29 AM PDT · 17517 days ago · 15 km deep · 34 km away
17. 1.811km SW of Morongo Valley, CATue, Oct 17, 6:28 AM PDT · 17517 days ago · 16 km deep · 57 km away
18. 2.21km ESE of Loma Linda, CATue, Oct 17, 3:33 AM PDT · 17517 days ago · 17 km deep · 87 km away
19. 1.910km SW of Idyllwild, CAMon, Oct 16, 10:39 PM PDT · 17518 days ago · 15 km deep · 30 km away
20. 2.527km E of Pine Valley, CAMon, Oct 16, 6:04 PM PDT · 17518 days ago · 15 km deep · 76 km away

From the USGS Earthquake Hazards Program and its partner networks, event ci3343097. Read Fri, Oct 2, 2026, 6:08 PM UTC.