M2.1 earthquake 4km NNE of Simi Valley, CA

Magnitude

2.1 (mc), micro

Local time

Sat, Sep 19, 1981, 10:45 PM PDT

UTC

1981-09-20 05:45:30 UTC

Depth

20.0 km (12.5 mi), shallow

Epicenter

34.305° N, 118.724° 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

50°

Stations used

22

• Simi Valley, CaliforniaPopulation 126,788. Forecast7 kmNE
• Los Angeles, CaliforniaPopulation 3,820,914. Forecast52 kmWNW

After

1. 1.732km NNW of Santa Barbara Is., CASun, Sep 20, 4:32 AM PDT · 16440 days ago · 6 km deep · 74 km away
2. 1.623km N of Santa Barbara Is., CASun, Sep 20, 9:49 PM PDT · 16439 days ago · 6 km deep · 75 km away
3. 2.44km NNE of Simi Valley, CASun, Sep 20, 10:27 PM PDT · 16439 days ago · 21 km deep · 1 km away
4. 2.816km NNE of Santa Barbara Is., CAMon, Sep 21, 3:08 AM PDT · 16439 days ago · 13 km deep · 82 km away
5. 2.021km NNE of Santa Barbara Is., CAMon, Sep 21, 3:38 PM PDT · 16439 days ago · 9 km deep · 77 km away
6. 2.124km N of Santa Barbara Is., CAMon, Sep 21, 5:11 PM PDT · 16439 days ago · 10 km deep · 76 km away
7. 1.517km N of Santa Barbara Is., CATue, Sep 22, 10:52 AM PDT · 16438 days ago · 18 km deep · 82 km away
8. 1.94km SSW of Valencia, CAWed, Sep 23, 4:41 AM PDT · 16437 days ago · 14 km deep · 18 km away
9. 2.118km N of Santa Barbara Is., CAWed, Sep 23, 6:52 AM PDT · 16437 days ago · 6 km deep · 80 km away
10. 2.121km N of Santa Barbara Is., CAWed, Sep 23, 12:11 PM PDT · 16437 days ago · 17 km deep · 79 km away
11. 2.320km NNE of Santa Barbara Is., CAWed, Sep 23, 12:54 PM PDT · 16437 days ago · 9 km deep · 78 km away
12. 1.94km SE of Malibu, CAWed, Sep 23, 7:36 PM PDT · 16436 days ago · 13 km deep · 37 km away
13. 1.54km SW of Valencia, CAWed, Sep 23, 11:05 PM PDT · 16436 days ago · 17 km deep · 18 km away
14. 1.71km WSW of Silver Lake, CAThu, Sep 24, 12:11 PM PDT · 16436 days ago · 6 km deep · 48 km away
15. 1.721km N of Santa Barbara Is., CAThu, Sep 24, 10:45 PM PDT · 16435 days ago · 6 km deep · 78 km away
16. 1.512km WSW of Malibu, CAFri, Sep 25, 9:54 AM PDT · 16435 days ago · 13 km deep · 43 km away
17. 1.810km W of Malibu, CAFri, Sep 25, 10:00 AM PDT · 16435 days ago · 13 km deep · 38 km away
18. 1.510km WNW of Rancho Palos Verdes, CAFri, Sep 25, 3:03 PM PDT · 16435 days ago · 6 km deep · 64 km away
19. 2.54km SSW of Valencia, CAFri, Sep 25, 5:18 PM PDT · 16435 days ago · 10 km deep · 18 km away
20. 1.722km N of Santa Barbara Is., CAFri, Sep 25, 10:58 PM PDT · 16434 days ago · 6 km deep · 76 km away
21. 2.224km NNE of Santa Barbara Is., CAFri, Sep 25, 11:58 PM PDT · 16434 days ago · 0 km deep · 74 km away
22. 2.225km NNE of Santa Barbara Is., CASat, Sep 26, 12:50 AM PDT · 16434 days ago · 7 km deep · 73 km away
23. 1.722km N of Santa Barbara Is., CASat, Sep 26, 9:53 AM PDT · 16434 days ago · 6 km deep · 76 km away
24. 1.523km NW of Grapevine, CASat, Sep 26, 7:33 PM PDT · 16433 days ago · 12 km deep · 93 km away
25. 2.321km NNW of Santa Barbara Is., CASun, Sep 27, 1:19 AM PDT · 16433 days ago · 9 km deep · 83 km away
26. 2.622km NNW of Santa Barbara Is., CASun, Sep 27, 7:33 AM PDT · 16433 days ago · 6 km deep · 84 km away
27. 2.112km W of El Segundo, CASun, Sep 27, 1:59 PM PDT · 16433 days ago · 3 km deep · 48 km away
28. 2.237km NNW of Santa Barbara Is., CAMon, Sep 28, 2:46 AM PDT · 16432 days ago · 6 km deep · 75 km away
29. 2.319km NNE of Santa Barbara Is., CATue, Sep 29, 11:12 AM PDT · 16431 days ago · 10 km deep · 79 km away
30. 2.221km NNE of Santa Barbara Is., CATue, Sep 29, 2:33 PM PDT · 16431 days ago · 6 km deep · 76 km away
31. 1.637km NNW of Santa Barbara Is., CATue, Sep 29, 5:24 PM PDT · 16431 days ago · 6 km deep · 73 km away
32. 2.124km N of Santa Barbara Is., CATue, Sep 29, 6:37 PM PDT · 16430 days ago · 6 km deep · 76 km away
33. 2.218km SSW of Santa Cruz Is. (E end), CAWed, Sep 30, 1:13 PM PDT · 16430 days ago · 10 km deep · 95 km away
34. 1.54km SSW of Valencia, CAWed, Sep 30, 7:06 PM PDT · 16429 days ago · 16 km deep · 18 km away
35. 2.224km N of Santa Barbara Is., CAThu, Oct 1, 2:25 AM PDT · 16429 days ago · 6 km deep · 76 km away
36. 2.12km WNW of Hawaiian Gardens, CAThu, Oct 1, 6:51 PM PDT · 16428 days ago · 12 km deep · 78 km away
37. 1.719km N of Santa Barbara Is., CAFri, Oct 2, 1:13 AM PDT · 16428 days ago · 6 km deep · 79 km away
38. 2.016km NNE of Santa Barbara Is., CAFri, Oct 2, 2:13 PM PDT · 16428 days ago · 6 km deep · 81 km away
39. 1.94km N of Gardena, CASat, Oct 3, 12:22 AM PDT · 16427 days ago · 3 km deep · 57 km away
40. 1.83km ENE of Inglewood, CASat, Oct 3, 12:23 AM PDT · 16427 days ago · 0 km deep · 53 km away
41. 1.84km E of Inglewood, CASat, Oct 3, 12:23 AM PDT · 16427 days ago · 13 km deep · 55 km away
42. 1.83km ESE of Inglewood, CASat, Oct 3, 12:26 AM PDT · 16427 days ago · 13 km deep · 55 km away
43. 1.71km SSW of Inglewood, CASat, Oct 3, 12:31 AM PDT · 16427 days ago · 14 km deep · 52 km away
44. 1.821km N of Santa Barbara Is., CASat, Oct 3, 8:00 AM PDT · 16427 days ago · 6 km deep · 78 km away
45. 1.831km NNW of Santa Barbara Is., CASat, Oct 3, 10:59 AM PDT · 16427 days ago · 6 km deep · 74 km away
46. 1.923km N of Santa Barbara Is., CASat, Oct 3, 2:15 PM PDT · 16427 days ago · 2 km deep · 75 km away
47. 1.515km ESE of Arvin, CASun, Oct 4, 3:54 AM PDT · 16426 days ago · 6 km deep · 97 km away
48. 1.719km NNE of Santa Barbara Is., CASun, Oct 4, 7:09 PM PDT · 16425 days ago · 8 km deep · 79 km away
49. 2.637km SE of Santa Cruz Is. (E end), CAMon, Oct 5, 1:31 PM PDT · 16425 days ago · 6 km deep · 75 km away
50. 1.521km SSE of Carpinteria, CAMon, Oct 5, 4:44 PM PDT · 16425 days ago · 12 km deep · 67 km away
51. 2.520km NNE of Santa Barbara Is., CAMon, Oct 5, 5:31 PM PDT · 16425 days ago · 6 km deep · 78 km away
52. 1.910km SSE of Malibu Beach, CAMon, Oct 5, 9:52 PM PDT · 16424 days ago · 12 km deep · 40 km away
53. 1.619km NNE of Santa Barbara Is., CATue, Oct 6, 12:06 AM PDT · 16424 days ago · 6 km deep · 79 km away
54. 1.619km N of Santa Barbara Is., CATue, Oct 6, 2:14 AM PDT · 16424 days ago · 6 km deep · 80 km away
55. 2.121km N of Santa Barbara Is., CATue, Oct 6, 4:02 AM PDT · 16424 days ago · 6 km deep · 77 km away
56. 2.114km WSW of Rancho Palos Verdes, CATue, Oct 6, 1:33 PM PDT · 16424 days ago · 15 km deep · 69 km away
57. 1.715km WSW of Rancho Palos Verdes, CATue, Oct 6, 1:36 PM PDT · 16424 days ago · 6 km deep · 69 km away
58. 1.615km WSW of Rancho Palos Verdes, CATue, Oct 6, 1:38 PM PDT · 16424 days ago · 5 km deep · 69 km away
59. 1.838km NNW of Santa Barbara Is., CAWed, Oct 7, 2:41 AM PDT · 16423 days ago · 6 km deep · 75 km away
60. 2.018km S of Santa Barbara, CAWed, Oct 7, 3:17 AM PDT · 16423 days ago · 1 km deep · 90 km away

The first 60 of 185.

Before

1. 1.721km N of Santa Barbara Is., CASat, Sep 19, 10:14 PM PDT · 16440 days ago · 8 km deep · 77 km away
2. 1.710km NE of Santa Barbara Is., CASat, Sep 19, 6:43 AM PDT · 16441 days ago · 6 km deep · 88 km away
3. 2.310km NE of Santa Barbara Is., CASat, Sep 19, 5:15 AM PDT · 16441 days ago · 6 km deep · 88 km away
4. 2.222km N of Santa Barbara Is., CASat, Sep 19, 1:59 AM PDT · 16441 days ago · 6 km deep · 77 km away
5. 1.926km NNW of Santa Barbara Is., CAFri, Sep 18, 9:34 AM PDT · 16442 days ago · 5 km deep · 77 km away
6. 2.222km NNW of Santa Barbara Is., CAFri, Sep 18, 4:05 AM PDT · 16442 days ago · 18 km deep · 81 km away
7. 1.626km N of Santa Barbara Is., CAThu, Sep 17, 6:53 PM PDT · 16442 days ago · 6 km deep · 76 km away
8. 2.020km N of Santa Barbara Is., CAThu, Sep 17, 2:05 PM PDT · 16443 days ago · 4 km deep · 79 km away
9. 1.510km ENE of Pine Mountain Club, CAWed, Sep 16, 10:58 PM PDT · 16443 days ago · 7 km deep · 72 km away
10. 1.722km NW of Grapevine, CAWed, Sep 16, 7:01 PM PDT · 16443 days ago · 0 km deep · 91 km away
11. 2.124km N of Santa Barbara Is., CAWed, Sep 16, 3:45 PM PDT · 16444 days ago · 6 km deep · 74 km away
12. 2.623km N of Santa Barbara Is., CATue, Sep 15, 11:29 PM PDT · 16444 days ago · 11 km deep · 77 km away
13. 2.02km NNE of Simi Valley, CATue, Sep 15, 10:49 PM PDT · 16444 days ago · 24 km deep · 2 km away
14. 2.85km NE of Simi Valley, CATue, Sep 15, 9:37 PM PDT · 16444 days ago · 17 km deep · 2 km away
15. 1.511km SE of Tehachapi, CATue, Sep 15, 6:51 PM PDT · 16444 days ago · 5 km deep · 90 km away
16. 3.416km NE of Santa Barbara Is., CATue, Sep 15, 6:19 PM PDT · 16444 days ago · 10 km deep · 84 km away
17. 3.016km NE of Santa Barbara Is., CATue, Sep 15, 6:16 PM PDT · 16444 days ago · 10 km deep · 83 km away
18. 1.526km N of Santa Barbara Is., CATue, Sep 15, 3:21 PM PDT · 16445 days ago · 8 km deep · 75 km away
19. 2.721km N of Santa Barbara Is., CATue, Sep 15, 1:37 PM PDT · 16445 days ago · 6 km deep · 77 km away
20. 2.917km NNE of Santa Barbara Is., CATue, Sep 15, 12:56 PM PDT · 16445 days ago · 6 km deep · 80 km away

From the USGS Earthquake Hazards Program and its partner networks, event ci523213. Read Thu, Sep 24, 2026, 12:34 PM UTC.