M1.7 earthquake 9km WSW of Anza, CA

Magnitude

1.7 (Mc), micro

Magnitude from

Southern California Seismic Network

Local time

Mon, Jul 17, 1978, 8:13 AM PDT

UTC

1978-07-17 15:13:07 UTC

Depth

5.7 km (3.5 mi), shallow

Epicenter

33.518° N, 116.755° W

Region

California

Tsunami flag

No

Status

Reviewed by a seismologist

Location uncertainty

About 0.4 km horizontally, 16.2 km in depth

Depth from

From location

Station coverage gap

93°

Stations used

17

• Anza, CaliforniaPopulation 3,014. Forecast9 kmWSW
• Valle Vista, CaliforniaPopulation 14,578. Forecast29 kmSSE
• Temecula, CaliforniaPopulation 110,003. Forecast37 kmE
• San Diego, CaliforniaPopulation 1,404,452. Forecast97 kmNNE

After

1. 1.926km ENE of Pine Valley, CAMon, Jul 17, 2:33 PM PDT · 17609 days ago · 6 km deep · 83 km away
2. 2.52km NNW of San Jacinto, CAMon, Jul 17, 7:29 PM PDT · 17609 days ago · 12 km deep · 37 km away
3. 1.79km ENE of Desert Hot Springs, CATue, Jul 18, 5:55 AM PDT · 17608 days ago · 10 km deep · 62 km away
4. 1.511km SE of Anza, CATue, Jul 18, 8:43 AM PDT · 17608 days ago · 8 km deep · 16 km away
5. 1.910km NE of Big Bear City, CATue, Jul 18, 6:02 PM PDT · 17608 days ago · 13 km deep · 90 km away
6. 1.512km NE of Borrego Springs, CAWed, Jul 19, 1:20 AM PDT · 17608 days ago · 10 km deep · 47 km away
7. 1.610km S of Idyllwild, CAThu, Jul 20, 9:33 AM PDT · 17606 days ago · 16 km deep · 15 km away
8. 2.58km N of Cabazon, CAFri, Jul 21, 4:40 AM PDT · 17606 days ago · 9 km deep · 52 km away
9. 1.59km SSW of Idyllwild, CAFri, Jul 21, 7:37 PM PDT · 17605 days ago · 19 km deep · 17 km away
10. 1.72km S of Loma Linda, CAFri, Jul 21, 8:56 PM PDT · 17605 days ago · 17 km deep · 74 km away
11. 1.630km W of Desert Center, CASat, Jul 22, 4:01 AM PDT · 17605 days ago · 9 km deep · 100 km away
12. 1.52km NW of Borrego Springs, CASat, Jul 22, 6:41 AM PDT · 17604 days ago · 5 km deep · 43 km away
13. 1.721km ESE of Anza, CASat, Jul 22, 12:18 PM PDT · 17604 days ago · 14 km deep · 27 km away
14. 2.517km NW of Yucca Valley, CASat, Jul 22, 2:14 PM PDT · 17604 days ago · 7 km deep · 80 km away
15. 1.717km E of Julian, CASat, Jul 22, 9:00 PM PDT · 17604 days ago · 15 km deep · 59 km away
16. 2.311km SSE of Lucerne Valley, CASat, Jul 22, 9:55 PM PDT · 17604 days ago · 5 km deep · 94 km away
17. 2.024km W of Westmorland, CASun, Jul 23, 3:07 AM PDT · 17604 days ago · 3 km deep · 96 km away
18. 1.66km S of Redlands, CASun, Jul 23, 9:50 AM PDT · 17603 days ago · 15 km deep · 67 km away
19. 1.78km SSE of Big Bear Lake, CAMon, Jul 24, 12:45 AM PDT · 17603 days ago · 12 km deep · 74 km away
20. 1.514km S of Anza, CAMon, Jul 24, 11:33 AM PDT · 17602 days ago · 14 km deep · 11 km away
21. 2.08km ENE of Villa Park, CAMon, Jul 24, 11:50 PM PDT · 17602 days ago · 7 km deep · 97 km away
22. 1.511km SSE of Lucerne Valley, CATue, Jul 25, 6:20 AM PDT · 17601 days ago · 8 km deep · 94 km away
23. 1.822km ESE of Anza, CATue, Jul 25, 10:41 AM PDT · 17601 days ago · 15 km deep · 28 km away
24. 3.611km SSE of Lucerne Valley, CATue, Jul 25, 5:38 PM PDT · 17601 days ago · 9 km deep · 95 km away
25. 1.611km SSE of Lucerne Valley, CATue, Jul 25, 5:45 PM PDT · 17601 days ago · 7 km deep · 95 km away
26. 2.311km SSE of Lucerne Valley, CATue, Jul 25, 5:51 PM PDT · 17601 days ago · 5 km deep · 95 km away
27. 1.811km SSE of Lucerne Valley, CATue, Jul 25, 5:54 PM PDT · 17601 days ago · 8 km deep · 94 km away
28. 2.112km SSE of Lucerne Valley, CATue, Jul 25, 6:29 PM PDT · 17601 days ago · 5 km deep · 94 km away
29. 1.621km ESE of Anza, CAWed, Jul 26, 4:01 AM PDT · 17601 days ago · 13 km deep · 27 km away
30. 1.510km SSE of Lucerne Valley, CAWed, Jul 26, 5:53 AM PDT · 17600 days ago · 5 km deep · 95 km away
31. 1.911km SSE of Lucerne Valley, CAWed, Jul 26, 8:24 AM PDT · 17600 days ago · 6 km deep · 94 km away
32. 1.59km ENE of Big Bear City, CAWed, Jul 26, 1:06 PM PDT · 17600 days ago · 11 km deep · 87 km away
33. 2.78km N of Borrego Springs, CAWed, Jul 26, 2:32 PM PDT · 17600 days ago · 14 km deep · 42 km away
34. 2.74km N of Glen Avon, CAWed, Jul 26, 3:44 PM PDT · 17600 days ago · 11 km deep · 90 km away
35. 2.110km SSW of Morongo Valley, CAWed, Jul 26, 4:50 PM PDT · 17600 days ago · 17 km deep · 51 km away
36. 2.05km SSE of Banning, CAWed, Jul 26, 9:09 PM PDT · 17600 days ago · 15 km deep · 42 km away
37. 1.58km NNE of Banning, CAWed, Jul 26, 11:24 PM PDT · 17600 days ago · 10 km deep · 53 km away
38. 2.38km SSW of Salton City, CAThu, Jul 27, 3:26 PM PDT · 17599 days ago · 8 km deep · 78 km away
39. 2.58km SSW of Salton City, CAThu, Jul 27, 3:26 PM PDT · 17599 days ago · 8 km deep · 78 km away
40. 1.88km SSW of Salton City, CAThu, Jul 27, 3:33 PM PDT · 17599 days ago · 6 km deep · 79 km away
41. 1.86km NW of Julian, CAThu, Jul 27, 9:36 PM PDT · 17599 days ago · 8 km deep · 46 km away
42. 1.714km S of Anza, CAFri, Jul 28, 1:06 PM PDT · 17598 days ago · 13 km deep · 11 km away
43. 1.58km WSW of Anza, CAFri, Jul 28, 10:32 PM PDT · 17598 days ago · 8 km deep · 1 km away
44. 1.514km S of Anza, CASat, Jul 29, 2:31 AM PDT · 17598 days ago · 15 km deep · 11 km away
45. 2.32km WNW of Borrego Springs, CASat, Jul 29, 11:18 AM PDT · 17597 days ago · 5 km deep · 43 km away
46. 1.62km NW of Borrego Springs, CASat, Jul 29, 5:08 PM PDT · 17597 days ago · 5 km deep · 43 km away
47. 1.511km N of Julian, CASat, Jul 29, 7:27 PM PDT · 17597 days ago · 14 km deep · 40 km away
48. 1.611km SSE of Lucerne Valley, CASun, Jul 30, 3:59 AM PDT · 17597 days ago · 6 km deep · 94 km away
49. 2.76km SSW of Idyllwild, CASun, Jul 30, 6:39 AM PDT · 17596 days ago · 17 km deep · 20 km away
50. 1.64km SSW of Idyllwild, CASun, Jul 30, 7:05 AM PDT · 17596 days ago · 18 km deep · 21 km away
51. 1.65km SSW of Idyllwild, CASun, Jul 30, 7:14 AM PDT · 17596 days ago · 19 km deep · 21 km away
52. 1.94km SSW of Idyllwild, CASun, Jul 30, 7:42 AM PDT · 17596 days ago · 17 km deep · 21 km away
53. 1.814km NE of Borrego Springs, CASun, Jul 30, 7:49 AM PDT · 17596 days ago · 11 km deep · 47 km away
54. 1.64km SW of Big Bear Lake, CASun, Jul 30, 8:41 AM PDT · 17596 days ago · 8 km deep · 79 km away
55. 1.611km SSE of Anza, CASun, Jul 30, 6:08 PM PDT · 17596 days ago · 6 km deep · 14 km away
56. 1.513km ESE of Anza, CASun, Jul 30, 10:57 PM PDT · 17596 days ago · 14 km deep · 20 km away
57. 2.09km ENE of Villa Park, CASun, Jul 30, 11:02 PM PDT · 17596 days ago · 5 km deep · 96 km away
58. 1.76km NNW of Ocotillo Wells, CAMon, Jul 31, 4:05 AM PDT · 17596 days ago · 6 km deep · 67 km away
59. 2.23km WSW of Yucaipa, CAMon, Jul 31, 1:37 PM PDT · 17595 days ago · 12 km deep · 63 km away
60. 1.55km SSE of Big Bear City, CAWed, Aug 2, 12:42 AM PDT · 17594 days ago · 10 km deep · 78 km away

The first 60 of 155.

Before

1. 1.612km ENE of Cabazon, CAMon, Jul 17, 1:10 AM PDT · 17610 days ago · 13 km deep · 50 km away
2. 1.912km NNE of Trabuco Canyon, CASun, Jul 16, 3:24 PM PDT · 17610 days ago · 4 km deep · 76 km away
3. 1.71km N of Cabazon, CASun, Jul 16, 10:30 AM PDT · 17610 days ago · 10 km deep · 46 km away
4. 1.52km ESE of Loma Linda, CASun, Jul 16, 9:15 AM PDT · 17610 days ago · 15 km deep · 73 km away
5. 1.79km WSW of Anza, CASun, Jul 16, 12:55 AM PDT · 17611 days ago · 5 km deep · 0 km away
6. 2.015km S of Anza, CASat, Jul 15, 5:02 PM PDT · 17611 days ago · 13 km deep · 12 km away
7. 1.615km SE of Anza, CASat, Jul 15, 4:00 AM PDT · 17612 days ago · 6 km deep · 20 km away
8. 1.65km SSW of Idyllwild, CAThu, Jul 13, 10:24 PM PDT · 17613 days ago · 18 km deep · 20 km away
9. 1.617km N of Joshua Tree, CAThu, Jul 13, 4:58 PM PDT · 17613 days ago · 10 km deep · 93 km away
10. 1.811km SE of Anza, CAThu, Jul 13, 8:03 AM PDT · 17613 days ago · 8 km deep · 15 km away
11. 1.84km SSW of Devore, CAWed, Jul 12, 8:15 PM PDT · 17614 days ago · 9 km deep · 97 km away
12. 2.715km E of Aguanga, CAWed, Jul 12, 7:10 AM PDT · 17614 days ago · 12 km deep · 12 km away
13. 1.57km N of Big Bear City, CAWed, Jul 12, 5:48 AM PDT · 17614 days ago · 10 km deep · 90 km away
14. 1.711km SSE of Lucerne Valley, CATue, Jul 11, 9:29 PM PDT · 17615 days ago · 8 km deep · 94 km away
15. 1.911km ESE of Anza, CATue, Jul 11, 11:02 AM PDT · 17615 days ago · 13 km deep · 16 km away
16. 1.86km N of Big Bear City, CAMon, Jul 10, 9:47 PM PDT · 17616 days ago · 7 km deep · 89 km away
17. 2.98km ENE of Big Bear City, CAMon, Jul 10, 5:22 PM PDT · 17616 days ago · 9 km deep · 86 km away
18. 2.816km NNE of Borrego Springs, CAMon, Jul 10, 2:02 AM PDT · 17617 days ago · 14 km deep · 45 km away
19. 1.74km WNW of Calimesa, CASun, Jul 9, 4:08 PM PDT · 17617 days ago · 12 km deep · 62 km away
20. 1.613km SE of Anza, CASun, Jul 9, 10:57 AM PDT · 17617 days ago · 8 km deep · 17 km away

From the USGS Earthquake Hazards Program and its partner networks, event ci3340765. Read Fri, Oct 2, 2026, 11:32 PM UTC.