M2.1 earthquake 2km NW of Orange, CA

Magnitude

2.1 (Mc), micro

Magnitude from

Southern California Seismic Network

Local time

Sun, Dec 18, 1983, 5:11 AM PST

UTC

1983-12-18 13:11:36 UTC

Depth

4.9 km (3.1 mi), shallow

Epicenter

33.820° N, 117.850° W

Region

California

Tsunami flag

No

Status

Reviewed by a seismologist

Location uncertainty

About 0.8 km horizontally, 3.9 km in depth

Depth from

From location

Station coverage gap

116°

Stations used

17

• Villa Park, CaliforniaPopulation 5,964. Forecast3 kmW
• Orange, CaliforniaPopulation 140,992. Forecast4 kmN
• Los Angeles, CaliforniaPopulation 3,820,914. Forecast45 kmSE

After

1. 1.711km NNE of Lake Arrowhead, CASun, Dec 18, 7:28 AM PST · 15630 days ago · 6 km deep · 88 km away
2. 2.47km SW of Big Bear Lake, CASun, Dec 18, 9:48 AM PST · 15629 days ago · 4 km deep · 92 km away
3. 2.58km W of Big Bear Lake, CASun, Dec 18, 7:07 PM PST · 15629 days ago · 4 km deep · 91 km away
4. 2.43km SE of Anaheim, CAMon, Dec 19, 7:18 AM PST · 15629 days ago · 8 km deep · 2 km away
5. 2.25km WNW of Wrightwood, CAMon, Dec 19, 9:06 AM PST · 15629 days ago · 5 km deep · 64 km away
6. 1.51km ESE of San Marino, CAMon, Dec 19, 8:28 PM PST · 15628 days ago · 5 km deep · 40 km away
7. 1.87km NNE of Aguanga, CATue, Dec 20, 1:30 AM PST · 15628 days ago · 11 km deep · 99 km away
8. 2.12km N of Corona, CATue, Dec 20, 2:10 AM PST · 15628 days ago · 8 km deep · 27 km away
9. 2.42km N of Corona, CATue, Dec 20, 2:11 AM PST · 15628 days ago · 5 km deep · 27 km away
10. 1.53km ENE of Montebello, CAWed, Dec 21, 4:00 AM PST · 15627 days ago · 4 km deep · 31 km away
11. 1.84km NE of Banning, CAWed, Dec 21, 11:20 AM PST · 15626 days ago · 9 km deep · 94 km away
12. 1.62km NNE of Fontana, CAWed, Dec 21, 2:55 PM PST · 15626 days ago · 6 km deep · 49 km away
13. 2.526km SSE of Malibu, CAWed, Dec 21, 10:35 PM PST · 15626 days ago · 5 km deep · 78 km away
14. 2.32km SSW of San Dimas, CAWed, Dec 21, 11:56 PM PST · 15626 days ago · 12 km deep · 30 km away
15. 2.45km SE of Loma Linda, CAThu, Dec 22, 5:53 PM PST · 15625 days ago · 11 km deep · 62 km away
16. 1.87km WSW of Idyllwild, CAThu, Dec 22, 10:10 PM PST · 15625 days ago · 16 km deep · 99 km away
17. 1.61km SE of Phelan, CAThu, Dec 22, 11:42 PM PST · 15625 days ago · 6 km deep · 72 km away
18. 1.88km S of Lytle Creek, CAFri, Dec 23, 9:51 AM PST · 15624 days ago · 5 km deep · 51 km away
19. 1.816km SW of Wrightwood, CAFri, Dec 23, 2:12 PM PST · 15624 days ago · 5 km deep · 48 km away
20. 1.79km NNE of Nuevo, CAFri, Dec 23, 5:03 PM PST · 15624 days ago · 12 km deep · 69 km away
21. 1.82km SSE of Loma Linda, CASat, Dec 24, 5:57 AM PST · 15624 days ago · 5 km deep · 60 km away
22. 1.610km NW of Big Bear Lake, CASun, Dec 25, 4:52 AM PST · 15623 days ago · 6 km deep · 96 km away
23. 2.310km W of Corona, CASun, Dec 25, 9:39 AM PST · 15623 days ago · 5 km deep · 17 km away
24. 1.77km ESE of Running Springs, CASun, Dec 25, 3:35 PM PST · 15622 days ago · 10 km deep · 85 km away
25. 2.645km NE of San Clemente Is. (SE tip), CASun, Dec 25, 4:27 PM PST · 15622 days ago · 6 km deep · 86 km away
26. 1.60km SSE of Inglewood, CASun, Dec 25, 6:53 PM PST · 15622 days ago · 5 km deep · 48 km away
27. 1.82km E of Banning, CASun, Dec 25, 8:05 PM PST · 15622 days ago · 14 km deep · 92 km away
28. 2.77km SW of Lucerne Valley, CASun, Dec 25, 9:49 PM PST · 15622 days ago · -1 km deep · 99 km away
29. 2.844km NE of San Clemente Is. (SE tip), CASun, Dec 25, 11:29 PM PST · 15622 days ago · 6 km deep · 87 km away
30. 2.93km WSW of Rancho Cucamonga, CAMon, Dec 26, 7:46 AM PST · 15622 days ago · 6 km deep · 40 km away
31. 2.40km ENE of Loma Linda, CATue, Dec 27, 1:09 PM PST · 15620 days ago · 16 km deep · 60 km away
32. 2.02km NW of Muscoy, CAWed, Dec 28, 2:37 AM PST · 15620 days ago · 8 km deep · 60 km away
33. 2.08km S of San Clemente, CAWed, Dec 28, 2:37 PM PST · 15619 days ago · 5 km deep · 56 km away
34. 1.711km WSW of Lucerne Valley, CAThu, Dec 29, 9:11 AM PST · 15619 days ago · 1 km deep · 96 km away
35. 3.62km NNW of Muscoy, CAThu, Dec 29, 11:46 AM PST · 15618 days ago · 7 km deep · 60 km away
36. 2.92km NW of Muscoy, CAThu, Dec 29, 11:49 AM PST · 15618 days ago · 5 km deep · 60 km away
37. 2.92km N of Muscoy, CAThu, Dec 29, 11:50 AM PST · 15618 days ago · 7 km deep · 61 km away
38. 2.12km NW of Muscoy, CAThu, Dec 29, 12:18 PM PST · 15618 days ago · 5 km deep · 60 km away
39. 1.61km NW of Muscoy, CAThu, Dec 29, 12:31 PM PST · 15618 days ago · 3 km deep · 60 km away
40. 2.32km N of Muscoy, CAThu, Dec 29, 12:38 PM PST · 15618 days ago · 7 km deep · 61 km away
41. 1.81km NW of Muscoy, CAThu, Dec 29, 3:53 PM PST · 15618 days ago · 2 km deep · 60 km away
42. 2.22km NW of Muscoy, CAThu, Dec 29, 4:47 PM PST · 15618 days ago · 7 km deep · 59 km away
43. 2.92km NNW of Muscoy, CAThu, Dec 29, 5:51 PM PST · 15618 days ago · 4 km deep · 60 km away
44. 1.73km NW of Muscoy, CAThu, Dec 29, 7:55 PM PST · 15618 days ago · 6 km deep · 59 km away
45. 1.73km NW of Muscoy, CAThu, Dec 29, 8:17 PM PST · 15618 days ago · 7 km deep · 59 km away
46. 1.61km NNW of Muscoy, CAFri, Dec 30, 2:02 AM PST · 15618 days ago · 2 km deep · 60 km away
47. 1.82km NNE of Lakewood, CAFri, Dec 30, 5:04 AM PST · 15618 days ago · 5 km deep · 26 km away
48. 1.91km ENE of Loma Linda, CASat, Dec 31, 4:25 PM PST · 15616 days ago · 13 km deep · 61 km away
49. 1.91km SW of Colton, CASat, Dec 31, 8:44 PM PST · 15616 days ago · 16 km deep · 56 km away
50. 2.410km S of San Clemente, CASat, Dec 31, 10:59 PM PST · 15616 days ago · 6 km deep · 57 km away
51. 1.68km WSW of Lytle Creek, CASun, Jan 1, 8:54 AM PST · 15616 days ago · 7 km deep · 52 km away
52. 2.12km SW of Colton, CASun, Jan 1, 11:39 AM PST · 15615 days ago · 18 km deep · 55 km away
53. 1.67km WSW of Lytle Creek, CASun, Jan 1, 3:04 PM PST · 15615 days ago · 7 km deep · 52 km away
54. 1.95km WSW of Lytle Creek, CASun, Jan 1, 3:04 PM PST · 15615 days ago · 8 km deep · 54 km away
55. 1.63km NNE of Fontana, CASun, Jan 1, 11:52 PM PST · 15615 days ago · 5 km deep · 50 km away
56. 1.96km WSW of Lytle Creek, CAMon, Jan 2, 7:45 AM PST · 15615 days ago · 6 km deep · 53 km away
57. 2.04km SSE of Chino Hills, CATue, Jan 3, 7:39 PM PST · 15613 days ago · 11 km deep · 19 km away
58. 2.18km WSW of Calimesa, CAThu, Jan 5, 10:04 AM PST · 15611 days ago · 16 km deep · 68 km away
59. 2.16km NNW of Mira Loma, CAThu, Jan 5, 11:55 AM PST · 15611 days ago · 11 km deep · 37 km away
60. 1.93km NNW of San Jacinto, CAThu, Jan 5, 11:59 AM PST · 15611 days ago · 12 km deep · 82 km away

The first 60 of 162.

Before

1. 1.83km SSE of Anaheim, CASun, Dec 18, 4:13 AM PST · 15630 days ago · 9 km deep · 3 km away
2. 1.82km SE of Anaheim, CASun, Dec 18, 4:10 AM PST · 15630 days ago · 9 km deep · 2 km away
3. 2.18km NW of Crestline, CAFri, Dec 16, 2:05 PM PST · 15631 days ago · 1 km deep · 69 km away
4. 2.02km NW of Loma Linda, CAFri, Dec 16, 1:40 PM PST · 15631 days ago · 15 km deep · 59 km away
5. 2.17km NW of Crestline, CAFri, Dec 16, 12:55 PM PST · 15631 days ago · 1 km deep · 69 km away
6. 2.23km ENE of Montebello, CAWed, Dec 14, 5:04 PM PST · 15633 days ago · 4 km deep · 30 km away
7. 1.70km NE of Wildomar, CASun, Dec 11, 11:59 PM PST · 15636 days ago · 5 km deep · 58 km away
8. 2.79km SW of Beaumont, CASun, Dec 11, 11:37 PM PST · 15636 days ago · 14 km deep · 75 km away
9. 1.513km E of Yucaipa, CASun, Dec 11, 8:45 AM PST · 15637 days ago · 22 km deep · 90 km away
10. 1.64km S of Loma Linda, CASun, Dec 11, 3:37 AM PST · 15637 days ago · 7 km deep · 59 km away
11. 1.717km S of Malibu Beach, CASat, Dec 10, 8:07 AM PST · 15638 days ago · 5 km deep · 78 km away
12. 1.77km ENE of San Jacinto, CAFri, Dec 9, 10:47 PM PST · 15638 days ago · 12 km deep · 89 km away
13. 1.98km S of Redlands, CAFri, Dec 9, 6:22 AM PST · 15639 days ago · 16 km deep · 64 km away
14. 2.42km SE of Yorba Linda, CAWed, Dec 7, 4:42 AM PST · 15641 days ago · 6 km deep · 8 km away
15. 1.75km S of Cabazon, CATue, Dec 6, 8:45 PM PST · 15641 days ago · 16 km deep · 97 km away
16. 2.112km WNW of Lakeland Village, CATue, Dec 6, 12:12 PM PST · 15641 days ago · 7 km deep · 39 km away
17. 1.69km NE of Moreno Valley, CATue, Dec 6, 5:31 AM PST · 15642 days ago · 13 km deep · 66 km away
18. 1.88km SW of Idyllwild, CASun, Dec 4, 9:47 PM PST · 15643 days ago · 17 km deep · 100 km away
19. 1.930km ESE of Avalon, CAFri, Dec 2, 6:09 PM PST · 15645 days ago · 6 km deep · 62 km away
20. 1.86km SSE of Loma Linda, CAThu, Dec 1, 9:20 PM PST · 15646 days ago · 17 km deep · 60 km away

From the USGS Earthquake Hazards Program and its partner networks, event ci25015. Read Sat, Oct 3, 2026, 5:17 AM UTC.