M1.7 earthquake 9km NE of Foothill Ranch, CA

Magnitude

1.7 (mh), micro

Local time

Mon, Mar 2, 1981, 12:55 AM PST

UTC

1981-03-02 08:55:32 UTC

Depth

5.5 km (3.4 mi), shallow

Epicenter

33.746° N, 117.592° W

Region

California

Tsunami flag

No

Status

Reviewed by a seismologist

Location uncertainty

About 1.8 km horizontally, 26.1 km in depth

Magnitude uncertainty

±0.37

Depth from

From location

Station coverage gap

98°

Stations used

5

• Portola Hills, CaliforniaPopulation 9,083. Forecast8 kmNNE
• Foothill Ranch, CaliforniaPopulation 11,698. Forecast9 kmNE
• Corona, CaliforniaPopulation 164,226. Forecast15 kmS
• Los Angeles, CaliforniaPopulation 3,820,914. Forecast69 kmESE

After

1. 1.812km NNE of Trabuco Canyon, CAMon, Mar 2, 1:06 AM PST · 16642 days ago · 0 km deep · 7 km away
2. 2.411km NNE of Trabuco Canyon, CAMon, Mar 2, 1:26 AM PST · 16642 days ago · 3 km deep · 6 km away
3. 1.68km SW of Beaumont, CAMon, Mar 2, 3:07 PM PST · 16642 days ago · 15 km deep · 53 km away
4. 1.77km SSE of Big Bear Lake, CAMon, Mar 2, 9:50 PM PST · 16641 days ago · 10 km deep · 80 km away
5. 1.69km NE of Aguanga, CATue, Mar 3, 1:23 AM PST · 16641 days ago · 4 km deep · 80 km away
6. 1.98km NE of Aguanga, CATue, Mar 3, 3:23 AM PST · 16641 days ago · 4 km deep · 80 km away
7. 1.67km NE of Aguanga, CATue, Mar 3, 2:39 PM PST · 16641 days ago · 10 km deep · 78 km away
8. 1.912km WSW of Morongo Valley, CATue, Mar 3, 8:17 PM PST · 16641 days ago · 15 km deep · 87 km away
9. 1.612km WSW of Morongo Valley, CATue, Mar 3, 9:51 PM PST · 16640 days ago · 15 km deep · 87 km away
10. 1.86km NNE of Beaumont, CAWed, Mar 4, 3:14 PM PST · 16640 days ago · 18 km deep · 64 km away
11. 1.64km W of Redlands, CAWed, Mar 4, 9:10 PM PST · 16639 days ago · 5 km deep · 49 km away
12. 1.99km SSW of Idyllwild, CAThu, Mar 5, 5:06 AM PST · 16639 days ago · 12 km deep · 78 km away
13. 1.69km SW of Beaumont, CAThu, Mar 5, 12:59 PM PST · 16639 days ago · 15 km deep · 52 km away
14. 1.53km NNW of Colton, CAThu, Mar 5, 3:55 PM PST · 16639 days ago · 8 km deep · 46 km away
15. 1.612km SSE of Rancho Palos Verdes, CAFri, Mar 6, 6:33 AM PST · 16638 days ago · 5 km deep · 72 km away
16. 1.52km ENE of Banning, CAFri, Mar 6, 8:03 PM PST · 16638 days ago · 3 km deep · 71 km away
17. 1.82km NE of Banning, CAFri, Mar 6, 9:47 PM PST · 16637 days ago · 3 km deep · 71 km away
18. 2.010km NE of Aguanga, CAFri, Mar 6, 10:07 PM PST · 16637 days ago · 4 km deep · 80 km away
19. 2.02km SE of Garnet, CASat, Mar 7, 9:18 AM PST · 16637 days ago · 11 km deep · 100 km away
20. 1.63km W of Inglewood, CASat, Mar 7, 1:51 PM PST · 16637 days ago · 3 km deep · 77 km away
21. 2.511km NE of Aguanga, CASun, Mar 8, 3:17 AM PST · 16636 days ago · 5 km deep · 80 km away
22. 1.74km WNW of San Clemente, CASun, Mar 8, 4:00 PM PST · 16636 days ago · 6 km deep · 35 km away
23. 1.610km WSW of Anza, CASun, Mar 8, 5:57 PM PST · 16636 days ago · -1 km deep · 80 km away
24. 2.410km NE of Aguanga, CASun, Mar 8, 7:37 PM PST · 16636 days ago · 5 km deep · 80 km away
25. 1.61km ESE of Garnet, CAMon, Mar 9, 3:44 AM PST · 16635 days ago · 13 km deep · 99 km away
26. 1.710km NE of Aguanga, CAMon, Mar 9, 7:11 AM PST · 16635 days ago · 4 km deep · 80 km away
27. 2.02km WNW of Compton, CAMon, Mar 9, 7:24 PM PST · 16635 days ago · 14 km deep · 62 km away
28. 1.64km SSW of Culver City, CATue, Mar 10, 12:20 AM PST · 16634 days ago · 5 km deep · 81 km away
29. 1.84km NNE of Cabazon, CATue, Mar 10, 2:47 AM PST · 16634 days ago · 14 km deep · 79 km away
30. 1.64km E of San Jacinto, CATue, Mar 10, 5:01 PM PST · 16634 days ago · 10 km deep · 63 km away
31. 1.83km WSW of Pomona, CATue, Mar 10, 6:16 PM PST · 16634 days ago · 10 km deep · 39 km away
32. 2.09km NE of Aguanga, CATue, Mar 10, 11:46 PM PST · 16633 days ago · 5 km deep · 80 km away
33. 1.69km NE of Aguanga, CAWed, Mar 11, 8:19 PM PST · 16633 days ago · 4 km deep · 79 km away
34. 2.68km NE of Aguanga, CAThu, Mar 12, 7:01 AM PST · 16632 days ago · 4 km deep · 79 km away
35. 1.62km W of Lake Henshaw, CAThu, Mar 12, 8:55 AM PST · 16632 days ago · 5 km deep · 94 km away
36. 1.815km SSE of Avalon, CAThu, Mar 12, 10:59 PM PST · 16631 days ago · 6 km deep · 88 km away
37. 2.04km SE of Wrightwood, CAFri, Mar 13, 2:34 AM PST · 16631 days ago · 4 km deep · 66 km away
38. 2.211km NE of Aguanga, CAFri, Mar 13, 4:40 AM PST · 16631 days ago · 5 km deep · 80 km away
39. 1.79km ESE of Anza, CAFri, Mar 13, 10:01 AM PST · 16631 days ago · 11 km deep · 96 km away
40. 1.810km NE of Aguanga, CAFri, Mar 13, 1:18 PM PST · 16631 days ago · 4 km deep · 80 km away
41. 1.613km SE of Anza, CASat, Mar 14, 10:03 AM PST · 16630 days ago · 9 km deep · 99 km away
42. 1.74km E of Vincent, CASat, Mar 14, 10:29 PM PST · 16629 days ago · 5 km deep · 95 km away
43. 1.910km SW of Anza, CAMon, Mar 16, 6:04 AM PST · 16628 days ago · 3 km deep · 81 km away
44. 1.66km NNE of Cabazon, CAMon, Mar 16, 11:26 AM PST · 16628 days ago · 13 km deep · 80 km away
45. 2.011km ENE of Cabazon, CAMon, Mar 16, 10:41 PM PST · 16627 days ago · 15 km deep · 87 km away
46. 1.822km SSW of Rancho Palos Verdes, CAMon, Mar 16, 11:15 PM PST · 16627 days ago · 5 km deep · 86 km away
47. 1.69km SW of Beaumont, CATue, Mar 17, 10:35 AM PST · 16627 days ago · 8 km deep · 53 km away
48. 1.98km WSW of Lake Henshaw, CATue, Mar 17, 1:16 PM PST · 16627 days ago · 11 km deep · 92 km away
49. 3.76km NNE of Yucaipa, CATue, Mar 17, 10:07 PM PST · 16626 days ago · 10 km deep · 65 km away
50. 2.02km NE of Loma Linda, CAWed, Mar 18, 10:50 AM PST · 16626 days ago · 15 km deep · 47 km away
51. 1.64km NNE of San Bernardino, CAWed, Mar 18, 4:09 PM PST · 16626 days ago · 3 km deep · 54 km away
52. 2.57km SE of Valle Vista, CAThu, Mar 19, 11:49 AM PST · 16625 days ago · 15 km deep · 70 km away
53. 1.99km NE of Aguanga, CAFri, Mar 20, 11:13 AM PST · 16624 days ago · 8 km deep · 80 km away
54. 1.75km SSW of Idyllwild, CASat, Mar 21, 5:12 AM PST · 16623 days ago · 16 km deep · 79 km away
55. 1.810km NE of Aguanga, CASat, Mar 21, 10:20 PM PST · 16622 days ago · 3 km deep · 80 km away
56. 1.82km ESE of Loma Linda, CASun, Mar 22, 10:45 AM PST · 16622 days ago · 13 km deep · 46 km away
57. 2.42km ESE of Loma Linda, CASun, Mar 22, 8:54 PM PST · 16621 days ago · 14 km deep · 47 km away
58. 1.92km W of Lake Henshaw, CAMon, Mar 23, 2:49 PM PST · 16621 days ago · 4 km deep · 93 km away
59. 1.714km SE of Anza, CAMon, Mar 23, 10:15 PM PST · 16620 days ago · 11 km deep · 99 km away
60. 1.59km WSW of Garnet, CATue, Mar 24, 12:00 PM PST · 16620 days ago · 14 km deep · 90 km away

The first 60 of 145.

Before

1. 2.13km ESE of Rowland Heights, CASat, Feb 28, 1:58 PM PST · 16644 days ago · 8 km deep · 36 km away
2. 2.010km NE of Aguanga, CASat, Feb 28, 12:19 PM PST · 16644 days ago · 3 km deep · 81 km away
3. 1.69km NE of Aguanga, CASat, Feb 28, 8:22 AM PST · 16644 days ago · 3 km deep · 80 km away
4. 1.99km NE of Aguanga, CAFri, Feb 27, 11:18 AM PST · 16645 days ago · 6 km deep · 80 km away
5. 1.910km NE of Aguanga, CAFri, Feb 27, 4:47 AM PST · 16645 days ago · 5 km deep · 80 km away
6. 1.72km SSE of Loma Linda, CAThu, Feb 26, 9:42 PM PST · 16645 days ago · 15 km deep · 45 km away
7. 1.911km NE of Trabuco Canyon, CAThu, Feb 26, 6:53 PM PST · 16646 days ago · 7 km deep · 8 km away
8. 2.18km NE of Aguanga, CAThu, Feb 26, 4:25 PM PST · 16646 days ago · 3 km deep · 80 km away
9. 1.510km NE of Aguanga, CAWed, Feb 25, 3:37 AM PST · 16647 days ago · 4 km deep · 80 km away
10. 2.52km ESE of Loma Linda, CAMon, Feb 23, 2:49 AM PST · 16649 days ago · 15 km deep · 46 km away
11. 1.76km SE of Loma Linda, CAMon, Feb 23, 1:46 AM PST · 16649 days ago · 15 km deep · 44 km away
12. 1.93km E of Colton, CASun, Feb 22, 4:10 PM PST · 16650 days ago · 16 km deep · 47 km away
13. 2.18km SSW of Idyllwild, CASat, Feb 21, 2:58 PM PST · 16651 days ago · 14 km deep · 78 km away
14. 2.58km SSW of Idyllwild, CASat, Feb 21, 2:56 PM PST · 16651 days ago · 10 km deep · 79 km away
15. 3.410km SSW of Idyllwild, CASat, Feb 21, 2:56 PM PST · 16651 days ago · 11 km deep · 77 km away
16. 1.98km NE of Aguanga, CAThu, Feb 19, 1:07 PM PST · 16653 days ago · 4 km deep · 78 km away
17. 1.810km S of Idyllwild, CAThu, Feb 19, 12:50 PM PST · 16653 days ago · 15 km deep · 81 km away
18. 1.87km SSE of Redlands, CAThu, Feb 19, 9:08 AM PST · 16653 days ago · 13 km deep · 48 km away
19. 1.78km NE of Aguanga, CAThu, Feb 19, 6:24 AM PST · 16653 days ago · 7 km deep · 77 km away
20. 1.64km SE of Lytle Creek, CAWed, Feb 18, 11:50 PM PST · 16653 days ago · 5 km deep · 56 km away

From the USGS Earthquake Hazards Program and its partner networks, event ci3276428. Read Thu, Sep 24, 2026, 4:19 PM UTC.