M2.3 earthquake 4km N of Foothill Ranch, CA

Magnitude

2.3 (mh), micro

Local time

Tue, May 22, 1973, 5:13 AM PDT

UTC

1973-05-22 12:13:06 UTC

Depth

6.0 km (3.7 mi), shallow

Epicenter

33.722° N, 117.665° W

Region

California

Tsunami flag

No

Status

Reviewed by a seismologist

Location uncertainty

About 2.5 km horizontally, 31.6 km in depth

Magnitude uncertainty

±0.20

Depth from

Operator assigned

Station coverage gap

177°

Stations used

6

• Foothill Ranch, CaliforniaPopulation 11,698. Forecast4 kmN
• Irvine, CaliforniaPopulation 256,927. Forecast16 kmENE
• Los Angeles, CaliforniaPopulation 3,820,914. Forecast65 kmSE

After

1. 1.77km NE of North Tustin, CATue, May 22, 5:24 AM PDT · 19485 days ago · 3 km deep · 11 km away
2. 1.78km NNE of Lake View Terrace, CATue, May 22, 6:11 AM PDT · 19485 days ago · 6 km deep · 92 km away
3. 2.32km N of Lake View Terrace, CATue, May 22, 7:41 PM PDT · 19485 days ago · 5 km deep · 90 km away
4. 2.11km WNW of Lake Arrowhead, CAWed, May 23, 12:47 AM PDT · 19485 days ago · 6 km deep · 73 km away
5. 1.711km N of Lake View Terrace, CAWed, May 23, 2:30 AM PDT · 19485 days ago · 8 km deep · 98 km away
6. 2.77km S of Idyllwild, CAWed, May 23, 10:20 AM PDT · 19484 days ago · 5 km deep · 87 km away
7. 1.78km N of Sunland, CAThu, May 24, 2:22 AM PDT · 19484 days ago · 8 km deep · 90 km away
8. 2.21km SE of Los Angeles, CAThu, May 24, 2:59 AM PDT · 19484 days ago · 0 km deep · 64 km away
9. 2.412km SSW of Agua Dulce, CAFri, May 25, 11:07 AM PDT · 19482 days ago · 6 km deep · 98 km away
10. 2.89km SW of Idyllwild, CAFri, May 25, 1:09 PM PDT · 19482 days ago · 6 km deep · 80 km away
11. 2.410km NE of Aguanga, CAFri, May 25, 2:21 PM PDT · 19482 days ago · 6 km deep · 86 km away
12. 1.74km SE of Ontario, CAFri, May 25, 3:56 PM PDT · 19482 days ago · 7 km deep · 35 km away
13. 1.77km N of Lake View Terrace, CAWed, May 30, 10:53 AM PDT · 19477 days ago · 2 km deep · 94 km away
14. 2.22km SSW of Fontana, CAWed, May 30, 12:53 PM PDT · 19477 days ago · 10 km deep · 44 km away
15. 2.510km NW of Big Bear Lake, CAWed, May 30, 7:17 PM PDT · 19477 days ago · 6 km deep · 91 km away
16. 1.72km W of Willowbrook, CAFri, Jun 1, 11:48 PM PDT · 19475 days ago · 10 km deep · 60 km away
17. 1.710km SW of Mead Valley, CASat, Jun 2, 10:07 AM PDT · 19474 days ago · 6 km deep · 27 km away
18. 1.79km N of Lake View Terrace, CASun, Jun 3, 10:06 AM PDT · 19473 days ago · 5 km deep · 96 km away
19. 1.711km ESE of Santa Clarita, CATue, Jun 5, 4:55 AM PDT · 19471 days ago · 12 km deep · 100 km away
20. 1.72km NE of Costa Mesa, CATue, Jun 5, 9:19 PM PDT · 19471 days ago · 9 km deep · 22 km away
21. 2.26km WSW of Devore, CATue, Jun 5, 9:31 PM PDT · 19471 days ago · 2 km deep · 57 km away
22. 1.78km NNE of Pacoima, CAWed, Jun 6, 6:18 PM PDT · 19470 days ago · 4 km deep · 97 km away
23. 1.72km NNW of Villa Park, CAThu, Jun 7, 12:23 AM PDT · 19470 days ago · 7 km deep · 19 km away
24. 2.17km SW of Santa Monica, CAThu, Jun 7, 1:48 AM PDT · 19470 days ago · 6 km deep · 87 km away
25. 2.22km NNE of El Segundo, CAThu, Jun 7, 3:38 AM PDT · 19469 days ago · 6 km deep · 73 km away
26. 1.77km NNW of Lake View Terrace, CAThu, Jun 7, 6:22 AM PDT · 19469 days ago · 2 km deep · 95 km away
27. 2.25km E of Villa Park, CAThu, Jun 7, 4:04 PM PDT · 19469 days ago · 6 km deep · 13 km away
28. 1.710km N of Lake View Terrace, CAThu, Jun 7, 10:58 PM PDT · 19469 days ago · 5 km deep · 97 km away
29. 1.710km NNE of Pacoima, CASat, Jun 9, 12:20 AM PDT · 19468 days ago · 8 km deep · 99 km away
30. 1.74km NW of Huntington Park, CASat, Jun 9, 4:26 AM PDT · 19467 days ago · 6 km deep · 63 km away
31. 2.64km W of Calimesa, CASat, Jun 9, 5:10 AM PDT · 19467 days ago · 5 km deep · 60 km away
32. 1.71km SSE of Los Alamitos, CAThu, Jun 14, 8:46 PM PDT · 19462 days ago · 5 km deep · 38 km away
33. 1.77km NNE of Lake View Terrace, CAThu, Jun 14, 9:40 PM PDT · 19462 days ago · 5 km deep · 91 km away
34. 2.56km WNW of Mira Loma, CAFri, Jun 15, 12:42 PM PDT · 19461 days ago · 3 km deep · 33 km away
35. 1.711km N of Lake View Terrace, CAFri, Jun 15, 10:35 PM PDT · 19461 days ago · 8 km deep · 97 km away
36. 1.76km NE of Pacoima, CASat, Jun 16, 4:33 AM PDT · 19460 days ago · 1 km deep · 96 km away
37. 1.711km N of Lake View Terrace, CASat, Jun 16, 4:33 AM PDT · 19460 days ago · 9 km deep · 96 km away
38. 1.79km N of Lake View Terrace, CASat, Jun 16, 4:45 AM PDT · 19460 days ago · 4 km deep · 95 km away
39. 1.78km N of Lake View Terrace, CASat, Jun 16, 4:47 AM PDT · 19460 days ago · 3 km deep · 95 km away
40. 3.834km W of La Jolla, CATue, Jun 19, 3:26 AM PDT · 19458 days ago · 6 km deep · 96 km away
41. 3.032km W of La Jolla, CATue, Jun 19, 3:50 AM PDT · 19457 days ago · 6 km deep · 95 km away
42. 1.710km NNE of Pacoima, CAWed, Jun 20, 1:51 PM PDT · 19456 days ago · 8 km deep · 99 km away
43. 1.75km NNW of Pacoima, CAFri, Jun 22, 3:09 PM PDT · 19454 days ago · 3 km deep · 99 km away
44. 1.79km NNE of Pacoima, CAFri, Jun 22, 10:45 PM PDT · 19454 days ago · 5 km deep · 98 km away
45. 1.710km N of Lake View Terrace, CASat, Jun 23, 11:36 AM PDT · 19453 days ago · 8 km deep · 97 km away
46. 3.18km SSW of Cabazon, CAMon, Jun 25, 5:39 AM PDT · 19451 days ago · 19 km deep · 78 km away
47. 1.72km ENE of Lake View Terrace, CAMon, Jun 25, 7:46 PM PDT · 19451 days ago · 5 km deep · 88 km away
48. 1.710km N of Lake View Terrace, CATue, Jun 26, 2:49 AM PDT · 19451 days ago · 5 km deep · 95 km away
49. 2.810km NNE of Cabazon, CATue, Jun 26, 4:37 PM PDT · 19450 days ago · 6 km deep · 90 km away
50. 1.71km E of Encino, CAWed, Jun 27, 2:19 PM PDT · 19449 days ago · 5 km deep · 90 km away
51. 1.76km NNE of Lake Arrowhead, CAWed, Jun 27, 6:56 PM PDT · 19449 days ago · 2 km deep · 79 km away
52. 1.73km S of Irvine, CAThu, Jun 28, 9:14 PM PDT · 19448 days ago · 5 km deep · 15 km away
53. 1.74km SSE of Chino Hills, CASat, Jun 30, 4:49 AM PDT · 19446 days ago · 9 km deep · 27 km away
54. 2.818km N of Cabazon, CASat, Jun 30, 5:32 PM PDT · 19446 days ago · 9 km deep · 90 km away
55. 2.80km E of Lakewood, CASun, Jul 1, 2:44 PM PDT · 19445 days ago · 10 km deep · 45 km away
56. 3.03km ESE of Hollywood, CAMon, Jul 2, 8:48 AM PDT · 19444 days ago · 3 km deep · 71 km away
57. 1.71km S of Hollywood, CAMon, Jul 2, 9:04 AM PDT · 19444 days ago · 7 km deep · 73 km away
58. 1.82km NNW of MacArthur Park, CAMon, Jul 2, 7:29 PM PDT · 19444 days ago · 6 km deep · 69 km away
59. 2.32km SE of Hollywood, CAMon, Jul 2, 7:32 PM PDT · 19444 days ago · 0 km deep · 72 km away
60. 1.72km SW of Chino Hills, CAMon, Jul 2, 7:53 PM PDT · 19444 days ago · 9 km deep · 30 km away

The first 60 of 88.

Before

1. 2.010km NE of Aguanga, CATue, May 22, 2:22 AM PDT · 19486 days ago · 6 km deep · 86 km away
2. 1.74km NNE of Lake View Terrace, CAMon, May 21, 4:41 PM PDT · 19486 days ago · 7 km deep · 90 km away
3. 1.79km N of Lake View Terrace, CASun, May 20, 1:46 PM PDT · 19487 days ago · 6 km deep · 95 km away
4. 1.72km WSW of Lennox, CASun, May 20, 11:08 AM PDT · 19487 days ago · 5 km deep · 69 km away
5. 2.45km E of Cabazon, CASun, May 20, 10:50 AM PDT · 19487 days ago · 6 km deep · 89 km away
6. 1.710km N of Pacoima, CASun, May 20, 6:43 AM PDT · 19487 days ago · 8 km deep · 100 km away
7. 1.79km N of Lake View Terrace, CASun, May 20, 6:39 AM PDT · 19487 days ago · 5 km deep · 96 km away
8. 2.57km N of Anza, CAFri, May 18, 5:24 PM PDT · 19489 days ago · 16 km deep · 94 km away
9. 3.26km W of Calimesa, CAThu, May 17, 11:35 PM PDT · 19490 days ago · 10 km deep · 58 km away
10. 1.76km SSE of Loma Linda, CAThu, May 17, 11:35 PM PDT · 19490 days ago · 6 km deep · 51 km away
11. 1.710km N of Lake View Terrace, CAMon, May 14, 10:38 PM PDT · 19493 days ago · 5 km deep · 95 km away
12. 2.24km SSW of Idyllwild, CAMon, May 14, 9:56 PM PDT · 19493 days ago · 6 km deep · 86 km away
13. 2.32km S of Los Angeles, CAMon, May 14, 7:21 PM PDT · 19493 days ago · 0 km deep · 64 km away
14. 1.71km N of La Crescenta-Montrose, CAMon, May 14, 2:59 AM PDT · 19494 days ago · 7 km deep · 78 km away
15. 1.98km NW of Rancho Cucamonga, CASat, May 12, 7:29 PM PDT · 19495 days ago · 0 km deep · 50 km away
16. 2.55km WSW of Florence-Graham, CASat, May 12, 6:52 PM PDT · 19495 days ago · 7 km deep · 64 km away
17. 1.710km NNE of Pacoima, CASat, May 12, 6:22 PM PDT · 19495 days ago · 7 km deep · 98 km away
18. 1.713km SSE of Malibu Beach, CASat, May 12, 5:54 AM PDT · 19495 days ago · 5 km deep · 94 km away
19. 2.619km NNW of Avalon, CAFri, May 11, 7:01 AM PDT · 19496 days ago · 6 km deep · 70 km away
20. 2.37km SSW of Santa Monica, CAThu, May 10, 7:35 PM PDT · 19497 days ago · 6 km deep · 85 km away

From the USGS Earthquake Hazards Program and its partner networks, event ci3319982. Read Sat, Sep 26, 2026, 10:05 PM UTC.