M2.1 earthquake 4km WNW of Willowbrook, CA

Magnitude

2.1 (Mc), micro

Magnitude from

Southern California Seismic Network

Local time

Wed, Mar 9, 1983, 11:21 PM PST

UTC

1983-03-10 07:21:40 UTC

Depth

12.7 km (7.9 mi), shallow

Epicenter

33.934° N, 118.293° W

Region

California

Tsunami flag

No

Status

Reviewed by a seismologist

Location uncertainty

About 0.6 km horizontally, 1.4 km in depth

Depth from

From location

Station coverage gap

104°

Stations used

13

• Westmont, CaliforniaPopulation 31,853. Forecast1 kmSE
• Inglewood, CaliforniaPopulation 111,666. Forecast6 kmESE
• Los Angeles, CaliforniaPopulation 3,820,914. Forecast14 kmSSW

After

1. 1.924km NNE of Santa Barbara Is., CAThu, Mar 10, 7:38 AM PST · 15915 days ago · 1 km deep · 70 km away
2. 1.517km S of Camarillo, CAWed, Mar 16, 7:41 AM PST · 15909 days ago · 9 km deep · 67 km away
3. 2.63km N of Corona, CAWed, Mar 16, 9:47 AM PST · 15909 days ago · 7 km deep · 67 km away
4. 2.45km S of Castaic, CAWed, Mar 16, 7:27 PM PST · 15908 days ago · 3 km deep · 65 km away
5. 2.05km N of Fontana, CAThu, Mar 17, 9:08 AM PST · 15908 days ago · 5 km deep · 80 km away
6. 2.211km WSW of Santa Barbara Is., CAThu, Mar 17, 1:18 PM PST · 15908 days ago · 10 km deep · 99 km away
7. 2.37km SSW of Littlerock, CAThu, Mar 17, 11:48 PM PST · 15907 days ago · 7 km deep · 64 km away
8. 1.711km N of Castaic, CASat, Mar 19, 5:39 PM PST · 15906 days ago · 5 km deep · 78 km away
9. 2.08km WSW of Oak Hills, CASun, Mar 20, 8:16 AM PST · 15905 days ago · 8 km deep · 90 km away
10. 2.14km NE of La Verne, CASun, Mar 20, 10:24 AM PST · 15905 days ago · 4 km deep · 55 km away
11. 2.56km S of Lytle Creek, CAMon, Mar 21, 7:46 AM PST · 15904 days ago · 11 km deep · 79 km away
12. 2.24km NNE of Fontana, CATue, Mar 22, 5:07 AM PST · 15903 days ago · 7 km deep · 81 km away
13. 2.33km SW of Valencia, CAWed, Mar 23, 4:02 PM PST · 15902 days ago · 1 km deep · 63 km away
14. 2.04km SE of Devore, CAWed, Mar 23, 7:11 PM PST · 15902 days ago · 9 km deep · 89 km away
15. 2.67km SSW of Littlerock, CAWed, Mar 23, 10:12 PM PST · 15901 days ago · 7 km deep · 65 km away
16. 2.50km NW of Silver Lake, CAThu, Mar 24, 9:22 AM PST · 15901 days ago · 9 km deep · 18 km away
17. 2.74km SSE of Malibu Beach, CAThu, Mar 24, 11:19 AM PST · 15901 days ago · 10 km deep · 36 km away
18. 2.53km SSW of South Whittier, CAFri, Mar 25, 6:22 AM PST · 15900 days ago · 13 km deep · 22 km away
19. 2.11km E of Loma Linda, CAFri, Mar 25, 10:13 AM PST · 15900 days ago · 14 km deep · 97 km away
20. 2.78km NE of Phelan, CASat, Mar 26, 8:19 AM PST · 15899 days ago · 4 km deep · 94 km away
21. 2.22km NNE of Loma Linda, CASun, Mar 27, 6:32 AM PST · 15898 days ago · 11 km deep · 97 km away
22. 2.12km WNW of Lennox, CASun, Mar 27, 9:43 AM PST · 15898 days ago · 10 km deep · 8 km away
23. 1.711km WSW of Manhattan Beach, CAMon, Mar 28, 5:43 PM PST · 15897 days ago · 10 km deep · 23 km away
24. 3.17km SSW of Devore, CATue, Mar 29, 6:27 AM PST · 15896 days ago · 6 km deep · 83 km away
25. 1.92km ENE of Malibu, CATue, Mar 29, 9:59 AM PST · 15896 days ago · 12 km deep · 46 km away
26. 2.46km SSW of Devore, CATue, Mar 29, 4:30 PM PST · 15896 days ago · 5 km deep · 84 km away
27. 1.77km SSW of Devore, CATue, Mar 29, 9:46 PM PST · 15895 days ago · 7 km deep · 84 km away
28. 1.72km SE of View Park-Windsor Hills, CATue, Mar 29, 10:05 PM PST · 15895 days ago · 5 km deep · 6 km away
29. 2.32km N of Loma Linda, CATue, Mar 29, 10:32 PM PST · 15895 days ago · 11 km deep · 97 km away
30. 1.610km ENE of Villa Park, CATue, Mar 29, 11:34 PM PST · 15895 days ago · 5 km deep · 55 km away
31. 2.628km NE of Santa Barbara Is., CAWed, Mar 30, 12:04 AM PST · 15895 days ago · 6 km deep · 60 km away
32. 2.625km WSW of Rancho Palos Verdes, CAWed, Mar 30, 12:04 AM PST · 15895 days ago · 0 km deep · 44 km away
33. 2.76km SE of Seal Beach, CAWed, Mar 30, 10:45 PM PST · 15894 days ago · 5 km deep · 33 km away
34. 2.07km WNW of Lytle Creek, CAThu, Mar 31, 8:08 AM PST · 15894 days ago · 6 km deep · 78 km away
35. 2.04km NNE of Muscoy, CAFri, Apr 1, 5:52 PM PST · 15893 days ago · 7 km deep · 94 km away
36. 1.52km E of Santa Clarita, CAFri, Apr 1, 6:28 PM PST · 15893 days ago · 8 km deep · 56 km away
37. 2.219km S of Malibu Beach, CASun, Apr 3, 8:21 AM PST · 15891 days ago · 3 km deep · 36 km away
38. 1.82km ESE of Santa Clarita, CASun, Apr 3, 11:50 PM PST · 15890 days ago · 10 km deep · 56 km away
39. 2.010km W of Lytle Creek, CAMon, Apr 4, 5:57 AM PST · 15890 days ago · 5 km deep · 72 km away
40. 1.85km WSW of Valencia, CAMon, Apr 4, 10:20 PM PST · 15889 days ago · 10 km deep · 63 km away
41. 1.65km SW of Valencia, CAMon, Apr 4, 10:53 PM PST · 15889 days ago · 12 km deep · 62 km away
42. 2.44km SW of Valencia, CAMon, Apr 4, 11:55 PM PST · 15889 days ago · 8 km deep · 62 km away
43. 1.75km SW of Valencia, CATue, Apr 5, 1:19 AM PST · 15889 days ago · 11 km deep · 62 km away
44. 2.04km NNE of Fontana, CAWed, Apr 6, 10:13 PM PST · 15887 days ago · 5 km deep · 81 km away
45. 1.56km NE of Rancho Cucamonga, CAFri, Apr 8, 1:26 PM PST · 15886 days ago · 5 km deep · 75 km away
46. 1.87km W of Malibu, CASat, Apr 9, 5:46 AM PST · 15885 days ago · 13 km deep · 55 km away
47. 2.09km W of Malibu, CASat, Apr 9, 5:46 AM PST · 15885 days ago · 9 km deep · 57 km away
48. 2.75km N of Fontana, CASat, Apr 9, 8:43 AM PST · 15885 days ago · 3 km deep · 80 km away
49. 2.25km N of Fontana, CASat, Apr 9, 9:01 AM PST · 15885 days ago · 4 km deep · 80 km away
50. 2.35km NNW of Fontana, CASat, Apr 9, 12:14 PM PST · 15885 days ago · 5 km deep · 79 km away
51. 3.34km W of El Segundo, CASun, Apr 10, 9:19 AM PST · 15884 days ago · 8 km deep · 15 km away
52. 1.75km SW of Valencia, CAThu, Apr 14, 4:45 AM PST · 15880 days ago · 11 km deep · 63 km away
53. 1.92km NNW of South El Monte, CAThu, Apr 14, 6:03 AM PST · 15880 days ago · 11 km deep · 26 km away
54. 2.120km S of Rancho Palos Verdes, CAThu, Apr 14, 10:37 AM PST · 15880 days ago · 19 km deep · 42 km away
55. 2.35km N of Fontana, CAThu, Apr 14, 11:13 AM PST · 15880 days ago · 5 km deep · 80 km away
56. 1.76km E of Las Flores, CAThu, Apr 14, 11:51 AM PST · 15880 days ago · 13 km deep · 27 km away
57. 1.53km WNW of Seal Beach, CAThu, Apr 14, 5:20 PM PST · 15880 days ago · -1 km deep · 25 km away
58. 1.80km NNE of Muscoy, CAFri, Apr 15, 11:47 AM PST · 15879 days ago · 8 km deep · 91 km away
59. 2.32km NNE of La Mirada, CAFri, Apr 15, 1:25 PM PST · 15879 days ago · 6 km deep · 27 km away
60. 2.58km NW of Granada Hills, CASat, Apr 16, 3:53 AM PST · 15878 days ago · 2 km deep · 50 km away

The first 60 of 88.

Before

1. 1.510km S of Lake Hughes, CAWed, Mar 9, 7:48 PM PST · 15915 days ago · 5 km deep · 74 km away
2. 1.73km E of Colton, CAWed, Mar 9, 6:20 PM PST · 15916 days ago · 15 km deep · 95 km away
3. 1.83km NNE of Fontana, CAWed, Mar 9, 8:32 AM PST · 15916 days ago · 8 km deep · 80 km away
4. 1.93km SW of Valencia, CAMon, Mar 7, 3:43 PM PST · 15918 days ago · 5 km deep · 63 km away
5. 2.219km SW of Rancho Palos Verdes, CASun, Mar 6, 2:45 PM PST · 15919 days ago · 11 km deep · 41 km away
6. 2.58km NW of Malibu, CASun, Mar 6, 2:32 AM PST · 15919 days ago · 12 km deep · 54 km away
7. 1.99km NW of Malibu, CASat, Mar 5, 3:17 PM PST · 15920 days ago · 11 km deep · 56 km away
8. 2.12km NNW of Huntington Beach, CASat, Mar 5, 9:43 AM PST · 15920 days ago · 5 km deep · 37 km away
9. 1.74km N of Fontana, CASat, Mar 5, 7:56 AM PST · 15920 days ago · 7 km deep · 80 km away
10. 3.72km NW of Willowbrook, CATue, Mar 1, 12:18 PM PST · 15924 days ago · 5 km deep · 2 km away
11. 2.62km E of Inglewood, CAMon, Feb 28, 11:09 PM PST · 15924 days ago · 5 km deep · 4 km away
12. 2.611km ENE of Santa Barbara Is., CAMon, Feb 28, 7:35 PM PST · 15924 days ago · 8 km deep · 77 km away
13. 2.44km NW of Willowbrook, CAMon, Feb 28, 10:11 AM PST · 15925 days ago · 2 km deep · 1 km away
14. 2.15km SE of Loma Linda, CASun, Feb 27, 3:17 AM PST · 15926 days ago · 16 km deep · 99 km away
15. 1.55km W of Devore, CASat, Feb 26, 6:27 AM PST · 15927 days ago · 10 km deep · 83 km away
16. 1.911km NW of Malibu, CAThu, Feb 24, 4:26 AM PST · 15929 days ago · 13 km deep · 58 km away
17. 3.08km NW of Malibu, CAThu, Feb 24, 4:14 AM PST · 15929 days ago · 14 km deep · 55 km away
18. 1.521km N of Santa Barbara Is., CAWed, Feb 23, 12:52 PM PST · 15930 days ago · 6 km deep · 74 km away
19. 2.217km WSW of El Segundo, CAWed, Feb 23, 5:40 AM PST · 15930 days ago · 12 km deep · 28 km away
20. 1.86km W of Ventura, CATue, Feb 22, 12:07 AM PST · 15931 days ago · 19 km deep · 100 km away

From the USGS Earthquake Hazards Program and its partner networks, event ci1102766. Read Mon, Oct 5, 2026, 2:44 PM UTC.