M2.6 earthquake 8km NNW of Foothill Ranch, CA

Magnitude

2.6 (ml), micro

Local time

Sun, Oct 16, 1977, 10:02 AM PDT

UTC

1977-10-16 17:02:35 UTC

Depth

6.5 km (4.1 mi), shallow

Epicenter

33.750° N, 117.705° W

Region

California

Tsunami flag

No

Status

Reviewed by a seismologist

Location uncertainty

About 0.7 km horizontally, 1.8 km in depth

Magnitude uncertainty

±0.20

Depth from

From location

Station coverage gap

68°

Stations used

39

• Stonegate, CaliforniaPopulation 18,938. Forecast6 kmNNE
• Irvine, CaliforniaPopulation 256,927. Forecast14 kmNE
• Los Angeles, CaliforniaPopulation 3,820,914. Forecast60 kmSE

After

1. 2.22km NNW of Fontana, CASun, Oct 16, 6:30 PM PDT · 17873 days ago · 3 km deep · 46 km away
2. 1.52km NNW of Fontana, CASun, Oct 16, 10:25 PM PDT · 17873 days ago · 5 km deep · 46 km away
3. 1.75km ENE of Cabazon, CAMon, Oct 17, 9:40 AM PDT · 17872 days ago · 14 km deep · 91 km away
4. 1.524km S of Malibu Beach, CAMon, Oct 17, 10:34 AM PDT · 17872 days ago · 10 km deep · 89 km away
5. 1.82km SW of Running Springs, CATue, Oct 18, 5:00 AM PDT · 17871 days ago · 5 km deep · 72 km away
6. 1.59km NE of Running Springs, CATue, Oct 18, 11:19 AM PDT · 17871 days ago · 3 km deep · 84 km away
7. 2.20km SE of Fountain Valley, CAWed, Oct 19, 2:01 AM PDT · 17871 days ago · 6 km deep · 23 km away
8. 1.54km WSW of Redlands, CAThu, Oct 20, 3:04 AM PDT · 17869 days ago · 15 km deep · 55 km away
9. 1.84km NW of Cabazon, CAThu, Oct 20, 10:16 AM PDT · 17869 days ago · 7 km deep · 84 km away
10. 2.53km S of Westminster, CAThu, Oct 20, 1:14 PM PDT · 17869 days ago · 2 km deep · 28 km away
11. 1.98km NNE of Running Springs, CAFri, Oct 21, 2:23 AM PDT · 17869 days ago · 4 km deep · 83 km away
12. 1.84km W of Yucaipa, CAFri, Oct 21, 4:42 AM PDT · 17868 days ago · 17 km deep · 65 km away
13. 3.710km SW of Lucerne Valley, CAFri, Oct 21, 9:59 PM PDT · 17868 days ago · 3 km deep · 92 km away
14. 1.510km SW of Lucerne Valley, CASat, Oct 22, 1:46 AM PDT · 17868 days ago · 4 km deep · 93 km away
15. 1.59km SW of Lucerne Valley, CASat, Oct 22, 11:58 AM PDT · 17867 days ago · 5 km deep · 93 km away
16. 1.810km SW of Lucerne Valley, CASun, Oct 23, 3:44 AM PDT · 17866 days ago · 5 km deep · 93 km away
17. 1.810km SW of Idyllwild, CASun, Oct 23, 2:10 PM PDT · 17866 days ago · 9 km deep · 86 km away
18. 1.78km N of Cabazon, CAMon, Oct 24, 7:58 AM PDT · 17865 days ago · 18 km deep · 88 km away
19. 2.622km SSE of San Pedro, CAMon, Oct 24, 12:36 PM PDT · 17865 days ago · 0 km deep · 54 km away
20. 1.57km WSW of Big Bear Lake, CATue, Oct 25, 6:16 AM PDT · 17864 days ago · 10 km deep · 84 km away
21. 1.58km WSW of Big Bear Lake, CATue, Oct 25, 6:27 AM PDT · 17864 days ago · 10 km deep · 84 km away
22. 1.64km SW of Pearblossum, CATue, Oct 25, 6:48 AM PDT · 17864 days ago · 5 km deep · 84 km away
23. 2.28km WSW of Big Bear Lake, CATue, Oct 25, 7:52 AM PDT · 17864 days ago · 8 km deep · 84 km away
24. 1.67km WSW of Big Bear Lake, CATue, Oct 25, 8:03 AM PDT · 17864 days ago · 9 km deep · 85 km away
25. 2.08km WSW of Big Bear Lake, CATue, Oct 25, 10:12 AM PDT · 17864 days ago · 8 km deep · 84 km away
26. 1.77km WSW of Big Bear Lake, CATue, Oct 25, 10:59 AM PDT · 17864 days ago · 8 km deep · 84 km away
27. 1.84km S of Idyllwild, CAWed, Oct 26, 12:52 AM PDT · 17864 days ago · 17 km deep · 91 km away
28. 1.512km WSW of Morongo Valley, CAWed, Oct 26, 12:41 PM PDT · 17863 days ago · 16 km deep · 97 km away
29. 1.511km NNE of Cabazon, CAWed, Oct 26, 8:24 PM PDT · 17863 days ago · 13 km deep · 95 km away
30. 1.62km SE of Granada Hills, CAThu, Oct 27, 3:49 AM PDT · 17862 days ago · 6 km deep · 92 km away
31. 1.88km NE of Cabazon, CAThu, Oct 27, 6:39 PM PDT · 17862 days ago · 15 km deep · 94 km away
32. 1.510km SW of Agua Dulce, CAFri, Oct 28, 5:19 PM PDT · 17861 days ago · 10 km deep · 98 km away
33. 1.510km NNE of Cabazon, CASat, Oct 29, 8:41 PM PDT · 17860 days ago · 16 km deep · 94 km away
34. 1.610km NNE of Yucaipa, CASun, Oct 30, 1:43 AM PDT · 17860 days ago · 4 km deep · 77 km away
35. 1.82km S of Westminster, CASun, Oct 30, 12:12 PM PST · 17859 days ago · 10 km deep · 28 km away
36. 2.18km E of Santa Clarita, CASun, Oct 30, 1:45 PM PST · 17859 days ago · 10 km deep · 98 km away
37. 1.710km NNE of Running Springs, CASun, Oct 30, 4:44 PM PST · 17859 days ago · 10 km deep · 84 km away
38. 1.512km NNE of Cabazon, CAWed, Nov 2, 5:38 AM PST · 17856 days ago · 11 km deep · 94 km away
39. 2.01km N of Huntington Beach, CAWed, Nov 2, 3:16 PM PST · 17856 days ago · 1 km deep · 28 km away
40. 1.67km SE of Santa Clarita, CAThu, Nov 3, 2:07 PM PST · 17855 days ago · 6 km deep · 98 km away
41. 2.311km WNW of Big Bear Lake, CAThu, Nov 3, 7:27 PM PST · 17855 days ago · 7 km deep · 88 km away
42. 1.811km NW of Big Bear Lake, CAThu, Nov 3, 8:17 PM PST · 17855 days ago · 8 km deep · 89 km away
43. 2.110km SSW of Idyllwild, CAFri, Nov 4, 3:18 PM PST · 17854 days ago · 13 km deep · 88 km away
44. 2.21km SW of Huntington Beach, CASat, Nov 5, 12:10 AM PST · 17854 days ago · 2 km deep · 29 km away
45. 1.54km NW of Calimesa, CASat, Nov 5, 7:45 AM PST · 17853 days ago · 16 km deep · 65 km away
46. 1.51km N of La Crescenta-Montrose, CASun, Nov 6, 12:02 AM PST · 17853 days ago · 3 km deep · 73 km away
47. 1.61km SW of Yorba Linda, CASun, Nov 6, 3:31 PM PST · 17852 days ago · 11 km deep · 18 km away
48. 1.59km SSW of Agua Dulce, CAMon, Nov 7, 4:50 PM PST · 17851 days ago · 7 km deep · 97 km away
49. 3.31km ESE of Fullerton, CATue, Nov 8, 2:52 AM PST · 17850 days ago · 8 km deep · 24 km away
50. 1.92km SSE of Brea, CATue, Nov 8, 3:33 AM PST · 17850 days ago · 12 km deep · 24 km away
51. 1.56km N of Beaumont, CATue, Nov 8, 4:33 AM PST · 17850 days ago · 15 km deep · 71 km away
52. 2.09km N of Big Bear Lake, CAWed, Nov 9, 11:57 AM PST · 17849 days ago · 2 km deep · 96 km away
53. 1.811km NNE of Cabazon, CAThu, Nov 10, 3:02 AM PST · 17848 days ago · 11 km deep · 92 km away
54. 1.72km WNW of Fontana, CAThu, Nov 10, 11:31 AM PST · 17848 days ago · 7 km deep · 45 km away
55. 1.70km NNW of Granada Hills, CAFri, Nov 11, 7:09 AM PST · 17847 days ago · 2 km deep · 94 km away
56. 1.88km WSW of Aguanga, CAFri, Nov 11, 5:29 PM PST · 17847 days ago · 5 km deep · 80 km away
57. 2.46km NE of Lake Arrowhead, CASat, Nov 12, 2:37 AM PST · 17846 days ago · 4 km deep · 79 km away
58. 1.96km NE of Lake Arrowhead, CASat, Nov 12, 2:39 AM PST · 17846 days ago · 5 km deep · 79 km away
59. 2.120km SSW of Rancho Palos Verdes, CASat, Nov 12, 3:02 AM PST · 17846 days ago · 6 km deep · 76 km away
60. 2.16km SW of Idyllwild, CASun, Nov 13, 12:18 PM PST · 17845 days ago · 16 km deep · 87 km away

The first 60 of 120.

Before

1. 1.69km NNW of Foothill Ranch, CASun, Oct 16, 9:54 AM PDT · 17873 days ago · 5 km deep · 2 km away
2. 1.74km SE of Loma Linda, CASun, Oct 16, 8:51 AM PDT · 17873 days ago · 18 km deep · 53 km away
3. 1.511km N of Running Springs, CASat, Oct 15, 9:01 PM PDT · 17874 days ago · 8 km deep · 84 km away
4. 1.76km NNE of Fontana, CASat, Oct 15, 7:36 PM PDT · 17874 days ago · 4 km deep · 51 km away
5. 1.57km NNE of Banning, CAThu, Oct 13, 5:36 AM PDT · 17876 days ago · 17 km deep · 82 km away
6. 2.02km SW of Redondo Beach, CAWed, Oct 12, 5:00 PM PDT · 17877 days ago · 10 km deep · 65 km away
7. 1.924km WSW of Carlsbad, CAWed, Oct 12, 2:51 AM PDT · 17877 days ago · 6 km deep · 79 km away
8. 1.52km NNE of Loma Linda, CAMon, Oct 10, 3:13 PM PDT · 17879 days ago · 16 km deep · 54 km away
9. 3.012km WSW of Newport Beach, CAMon, Oct 10, 5:38 AM PDT · 17879 days ago · 2 km deep · 37 km away
10. 1.612km NNE of Cabazon, CASun, Oct 9, 3:53 PM PDT · 17880 days ago · 11 km deep · 93 km away
11. 1.514km SSW of Wrightwood, CASun, Oct 9, 3:06 PM PDT · 17880 days ago · 6 km deep · 55 km away
12. 2.210km SW of Anza, CASun, Oct 9, 9:17 AM PDT · 17880 days ago · 6 km deep · 93 km away
13. 2.41km SE of Loma Linda, CASun, Oct 9, 7:52 AM PDT · 17880 days ago · 15 km deep · 53 km away
14. 3.39km E of Santa Clarita, CASat, Oct 8, 8:26 PM PDT · 17881 days ago · 9 km deep · 99 km away
15. 1.84km WSW of Devore, CASat, Oct 8, 12:05 PM PDT · 17881 days ago · 9 km deep · 56 km away
16. 1.92km SSE of Rossmoor, CAFri, Oct 7, 11:50 PM PDT · 17882 days ago · 6 km deep · 34 km away
17. 2.13km S of Torrance, CAFri, Oct 7, 2:39 PM PDT · 17882 days ago · 10 km deep · 59 km away
18. 1.68km N of Cabazon, CAFri, Oct 7, 4:56 AM PDT · 17882 days ago · 9 km deep · 88 km away
19. 2.011km NNE of Cabazon, CAFri, Oct 7, 3:55 AM PDT · 17882 days ago · 16 km deep · 92 km away
20. 1.56km WSW of Idyllwild, CAThu, Oct 6, 8:38 PM PDT · 17883 days ago · 16 km deep · 86 km away

From the USGS Earthquake Hazards Program and its partner networks, event ci3335247. Read Tue, Sep 22, 2026, 9:19 PM UTC.