M1.9 earthquake 13km W of Carlsbad, CA

Magnitude

1.9 (ML, local (Richter)), micro

Magnitude from

Southern California Seismic Network

Local time

Wed, Aug 4, 2021, 4:19 AM PDT

UTC

2021-08-04 11:19:21 UTC

Depth

12.5 km (7.8 mi), shallow

Epicenter

33.138° N, 117.490° W

Region

California

Tsunami flag

No

Status

Reviewed by a seismologist

Location uncertainty

About 0.5 km horizontally, 0.9 km in depth

Magnitude uncertainty

±0.16

Depth from

From location

Station coverage gap

198°, poorly surrounded by stations

Stations used

47

• Oceanside, CaliforniaPopulation 175,691. Forecast12 kmWSW
• San Diego, CaliforniaPopulation 1,404,452. Forecast56 kmNNW

After

1. 1.52km WSW of Costa Mesa, CAWed, Aug 4, 6:18 AM PDT · 1887 days ago · 10 km deep · 71 km away
2. 3.12km NW of Hemet, CAWed, Aug 4, 11:51 PM PDT · 1886 days ago · 17 km deep · 83 km away · felt by 573
3. 1.710km S of Idyllwild, CAFri, Aug 6, 2:38 PM PDT · 1884 days ago · 18 km deep · 93 km away
4. 2.26km SE of Valle Vista, CAFri, Aug 6, 9:22 PM PDT · 1884 days ago · 16 km deep · 88 km away · felt by 6
5. 1.76km S of Calimesa, CASat, Aug 7, 1:49 PM PDT · 1883 days ago · 4 km deep · 98 km away
6. 1.68km ESE of Valle Vista, CAFri, Aug 13, 4:24 AM PDT · 1878 days ago · 17 km deep · 89 km away
7. 1.510km S of Idyllwild, CASat, Aug 21, 1:22 PM PDT · 1869 days ago · 15 km deep · 92 km away
8. 1.916km NNE of Avalon, CASun, Aug 22, 12:44 PM PDT · 1868 days ago · 17 km deep · 80 km away
9. 1.94km NE of Temecula, CASun, Aug 22, 9:39 PM PDT · 1868 days ago · 9 km deep · 55 km away
10. 1.69km SE of Julian, CAMon, Aug 23, 2:03 PM PDT · 1867 days ago · 13 km deep · 91 km away
11. 1.710km NE of Aguanga, CAMon, Aug 23, 3:56 PM PDT · 1867 days ago · 4 km deep · 77 km away
12. 2.139km WSW of Encinitas, CASat, Aug 28, 7:21 AM PDT · 1863 days ago · 15 km deep · 28 km away
13. 1.83km SSE of Garden Grove, CASat, Aug 28, 1:30 PM PDT · 1862 days ago · 15 km deep · 81 km away
14. 1.614km WNW of Anza, CASat, Aug 28, 5:55 PM PDT · 1862 days ago · 5 km deep · 81 km away
15. 1.67km S of Idyllwild, CASat, Aug 28, 8:46 PM PDT · 1862 days ago · 14 km deep · 93 km away
16. 1.914km WNW of Anza, CAMon, Aug 30, 5:23 PM PDT · 1860 days ago · 5 km deep · 81 km away
17. 1.730km SW of Dana Point, CAFri, Sep 3, 6:52 PM PDT · 1856 days ago · 14 km deep · 48 km away
18. 1.64km WNW of Idyllwild, CAFri, Sep 3, 8:10 PM PDT · 1856 days ago · 13 km deep · 96 km away · felt by 1
19. 1.914km WNW of Anza, CAFri, Sep 3, 10:24 PM PDT · 1856 days ago · 5 km deep · 80 km away · felt by 2
20. 1.814km WNW of Anza, CAFri, Sep 3, 10:39 PM PDT · 1856 days ago · 5 km deep · 80 km away
21. 2.030km SW of Dana Point, CASat, Sep 4, 6:09 AM PDT · 1856 days ago · 13 km deep · 48 km away · felt by 2
22. 2.715km SE of Anza, CAMon, Sep 6, 6:14 AM PDT · 1854 days ago · 12 km deep · 93 km away
23. 2.72km WNW of Lake Henshaw, CATue, Sep 7, 2:41 AM PDT · 1853 days ago · 6 km deep · 67 km away · felt by 7
24. 1.814km WNW of Anza, CATue, Sep 7, 6:43 AM PDT · 1853 days ago · 6 km deep · 80 km away
25. 2.410km SSW of Idyllwild, CATue, Sep 7, 2:09 PM PDT · 1852 days ago · 15 km deep · 89 km away
26. 1.618km NNE of Pine Valley, CAThu, Sep 9, 3:24 PM PDT · 1850 days ago · 5 km deep · 99 km away
27. 1.85km NE of Wildomar, CATue, Sep 14, 3:40 AM PDT · 1846 days ago · 15 km deep · 60 km away · felt by 4
28. 1.629km WSW of Camp Pendleton South, CAWed, Sep 15, 11:10 AM PDT · 1844 days ago · 11 km deep · 16 km away
29. 1.610km NW of Idyllwild, CAWed, Sep 15, 1:17 PM PDT · 1844 days ago · 12 km deep · 100 km away
30. 2.35km NE of Wildomar, CAFri, Sep 17, 1:09 PM PDT · 1842 days ago · 14 km deep · 60 km away · felt by 7
31. 2.45km SE of Valle Vista, CATue, Sep 21, 10:06 AM PDT · 1838 days ago · 17 km deep · 88 km away · felt by 10
32. 3.410km NNW of Anza, CATue, Sep 21, 3:41 PM PDT · 1838 days ago · 13 km deep · 91 km away · felt by 296
33. 1.610km NNW of Anza, CATue, Sep 21, 3:42 PM PDT · 1838 days ago · 14 km deep · 92 km away
34. 1.610km S of Idyllwild, CATue, Sep 21, 3:42 PM PDT · 1838 days ago · 13 km deep · 92 km away
35. 1.610km S of Idyllwild, CATue, Sep 21, 3:43 PM PDT · 1838 days ago · 14 km deep · 92 km away
36. 1.510km NNW of Anza, CATue, Sep 21, 3:43 PM PDT · 1838 days ago · 14 km deep · 93 km away
37. 2.19km NNW of Anza, CATue, Sep 21, 3:48 PM PDT · 1838 days ago · 13 km deep · 91 km away · felt by 2
38. 1.610km NNW of Anza, CATue, Sep 21, 3:54 PM PDT · 1838 days ago · 13 km deep · 91 km away
39. 3.310km NNW of Anza, CATue, Sep 21, 3:57 PM PDT · 1838 days ago · 13 km deep · 91 km away · felt by 143
40. 1.910km NNW of Anza, CATue, Sep 21, 3:59 PM PDT · 1838 days ago · 13 km deep · 91 km away
41. 2.310km NNW of Anza, CATue, Sep 21, 4:00 PM PDT · 1838 days ago · 13 km deep · 91 km away
42. 1.510km NNW of Anza, CATue, Sep 21, 4:01 PM PDT · 1838 days ago · 14 km deep · 92 km away
43. 1.810km NNW of Anza, CATue, Sep 21, 4:13 PM PDT · 1838 days ago · 13 km deep · 91 km away
44. 1.710km NNW of Anza, CATue, Sep 21, 4:21 PM PDT · 1838 days ago · 13 km deep · 92 km away · felt by 1
45. 1.89km NNW of Anza, CATue, Sep 21, 11:59 PM PDT · 1838 days ago · 13 km deep · 92 km away
46. 1.511km NW of Julian, CAWed, Sep 22, 2:54 PM PDT · 1837 days ago · 18 km deep · 74 km away
47. 1.97km ESE of San Pedro, CAFri, Sep 24, 2:57 PM PDT · 1835 days ago · 9 km deep · 93 km away
48. 1.99km NNW of Anza, CASun, Sep 26, 4:42 AM PDT · 1834 days ago · 13 km deep · 91 km away
49. 2.06km SW of Banning, CASun, Sep 26, 9:31 AM PDT · 1833 days ago · 7 km deep · 99 km away
50. 2.19km SSW of Idyllwild, CAMon, Sep 27, 8:59 AM PDT · 1832 days ago · 14 km deep · 90 km away
51. 1.88km ENE of Moreno Valley, CASat, Oct 2, 3:22 PM PDT · 1827 days ago · 13 km deep · 97 km away
52. 1.83km ESE of Julian, CASun, Oct 3, 4:09 AM PDT · 1827 days ago · 14 km deep · 86 km away

Before

1. 1.84km N of Pine Valley, CASun, Aug 1, 6:46 AM PDT · 1890 days ago · 13 km deep · 95 km away
2. 2.06km S of Redlands, CASat, Jul 31, 2:31 PM PDT · 1890 days ago · 14 km deep · 100 km away
3. 2.743km WSW of Encinitas, CAThu, Jul 29, 8:29 PM PDT · 1892 days ago · 14 km deep · 32 km away · felt by 5
4. 1.86km ESE of Palomar Observatory, CAWed, Jul 28, 2:05 AM PDT · 1894 days ago · 9 km deep · 67 km away
5. 2.10km W of Brea, CAWed, Jul 28, 12:53 AM PDT · 1894 days ago · 8 km deep · 95 km away · felt by 4
6. 1.714km SW of Coronado, CATue, Jul 27, 11:16 AM PDT · 1894 days ago · 18 km deep · 63 km away
7. 1.69km S of Idyllwild, CAMon, Jul 26, 4:24 AM PDT · 1896 days ago · 12 km deep · 91 km away
8. 1.510km SSW of Idyllwild, CAMon, Jul 26, 4:24 AM PDT · 1896 days ago · 13 km deep · 89 km away
9. 2.012km ESE of Anza, CASat, Jul 24, 11:44 PM PDT · 1897 days ago · 14 km deep · 97 km away
10. 1.92km NW of Lake Henshaw, CASat, Jul 24, 3:09 PM PDT · 1897 days ago · 7 km deep · 67 km away
11. 1.622km SSW of Seal Beach, CAFri, Jul 23, 2:43 AM PDT · 1899 days ago · 13 km deep · 78 km away
12. 1.95km SW of Idyllwild, CAThu, Jul 22, 3:19 PM PDT · 1899 days ago · 17 km deep · 93 km away
13. 2.54km SE of Ontario, CAThu, Jul 22, 1:14 PM PDT · 1899 days ago · 16 km deep · 99 km away · felt by 6
14. 1.910km SW of Idyllwild, CAThu, Jul 22, 12:03 PM PDT · 1899 days ago · 17 km deep · 88 km away
15. 1.76km NW of Corona, CAThu, Jul 22, 11:26 AM PDT · 1899 days ago · 7 km deep · 87 km away
16. 1.75km ENE of Villa Park, CAMon, Jul 19, 8:03 PM PDT · 1902 days ago · 8 km deep · 82 km away
17. 1.811km NNE of Trabuco Canyon, CASun, Jul 18, 9:58 AM PDT · 1903 days ago · 8 km deep · 68 km away
18. 1.78km E of Yorba Linda, CASat, Jul 17, 1:34 PM PDT · 1904 days ago · 6 km deep · 86 km away
19. 1.617km ESE of Julian, CAFri, Jul 16, 1:41 AM PDT · 1906 days ago · 9 km deep · 100 km away
20. 1.66km WSW of Aguanga, CAThu, Jul 15, 8:20 PM PDT · 1906 days ago · 9 km deep · 61 km away

From the USGS Earthquake Hazards Program and its partner networks, event ci39763463. Read Sun, Oct 4, 2026, 3:07 AM UTC.