M1.9 earthquake 1 km WNW of Concord, California

Magnitude

1.9 (md), micro

Local time

Fri, Jul 23, 1982, 1:58 AM PDT

UTC

1982-07-23 08:58:15 UTC

Depth

13.9 km (8.6 mi), shallow

Epicenter

37.982° N, 122.046° W

Region

California

Tsunami flag

No

Status

Reviewed by a seismologist

Location uncertainty

About 0.3 km horizontally, 0.4 km in depth

Magnitude uncertainty

±0.19

Depth from

From location

Station coverage gap

73°

Stations used

35

• Concord, CaliforniaPopulation 128,667. Forecast1 kmWNW
• Los Angeles, CaliforniaPopulation 3,820,914. Forecast555 kmNW

After

1. 2.011 km SW of Brentwood, CaliforniaFri, Jul 23, 4:38 AM PDT · 16140 days ago · 16 km deep · 27 km away
2. 1.614 km ENE of East Foothills, CaliforniaSun, Jul 25, 2:07 AM PDT · 16138 days ago · 5 km deep · 71 km away
3. 1.77 km ESE of Clayton, CaliforniaSun, Jul 25, 5:08 AM PDT · 16138 days ago · 14 km deep · 18 km away
4. 1.89 km N of Rio Vista, CaliforniaSun, Jul 25, 3:45 PM PDT · 16137 days ago · 15 km deep · 42 km away
5. 2.21 km ENE of San Ramon, CaliforniaSat, Jul 31, 12:42 AM PDT · 16132 days ago · 9 km deep · 23 km away
6. 2.29 km ESE of East Foothills, CaliforniaSun, Aug 1, 11:07 PM PDT · 16130 days ago · 8 km deep · 76 km away
7. 1.73 km SW of Rutherford, CaliforniaMon, Aug 2, 2:11 PM PDT · 16129 days ago · 4 km deep · 62 km away
8. 1.515 km SE of Livermore, CaliforniaTue, Aug 3, 2:29 PM PDT · 16128 days ago · 2 km deep · 57 km away
9. 1.92 km SE of Pacifica, CaliforniaTue, Aug 3, 2:34 PM PDT · 16128 days ago · 10 km deep · 57 km away
10. 1.9Northern CaliforniaSat, Aug 7, 4:07 AM PDT · 16125 days ago · 3 km deep · 73 km away
11. 2.71 km NW of Rollingwood, CaliforniaSat, Aug 7, 9:37 AM PDT · 16125 days ago · 7 km deep · 26 km away
12. 1.83 km WNW of Daly City, CaliforniaSun, Aug 8, 11:07 AM PDT · 16124 days ago · 5 km deep · 49 km away
13. 2.02 km NW of Glen Ellen, CaliforniaMon, Aug 9, 5:54 AM PDT · 16123 days ago · 8 km deep · 62 km away
14. 1.82 km NNW of Glen Ellen, CaliforniaMon, Aug 9, 5:59 AM PDT · 16123 days ago · 10 km deep · 62 km away
15. 1.92 km NW of Glen Ellen, CaliforniaMon, Aug 9, 6:22 AM PDT · 16123 days ago · 9 km deep · 62 km away
16. 1.55 km ESE of East Foothills, CaliforniaMon, Aug 9, 11:40 AM PDT · 16123 days ago · 2 km deep · 73 km away
17. 2.812 km WSW of Byron, CaliforniaTue, Aug 10, 10:03 PM PDT · 16121 days ago · 16 km deep · 30 km away
18. 2.44 km SW of Green Valley, CaliforniaFri, Aug 13, 12:43 PM PDT · 16118 days ago · 12 km deep · 30 km away
19. 1.54 km NNE of Vine Hill, CaliforniaFri, Aug 13, 5:38 PM PDT · 16118 days ago · 16 km deep · 7 km away
20. 1.68 km N of Day Valley, CaliforniaSat, Aug 14, 12:19 PM PDT · 16117 days ago · 12 km deep · 98 km away
21. 2.70 km SE of Concord, CaliforniaTue, Aug 17, 11:34 AM PDT · 16115 days ago · 14 km deep · 2 km away
22. 1.72 km SW of Dublin, CaliforniaWed, Aug 18, 4:59 PM PDT · 16113 days ago · 9 km deep · 34 km away
23. 1.71 km S of Concord, CaliforniaWed, Aug 18, 5:11 PM PDT · 16113 days ago · 11 km deep · 3 km away
24. 1.912 km WSW of Byron, CaliforniaWed, Aug 18, 7:50 PM PDT · 16113 days ago · 15 km deep · 31 km away
25. 1.60 km SSE of Concord, CaliforniaWed, Aug 18, 9:01 PM PDT · 16113 days ago · 11 km deep · 2 km away
26. 3.31 km SW of Dublin, CaliforniaThu, Aug 19, 4:04 AM PDT · 16113 days ago · 10 km deep · 33 km away
27. 1.80 km SSE of Concord, CaliforniaThu, Aug 19, 9:22 AM PDT · 16113 days ago · 13 km deep · 2 km away
28. 3.32 km SSW of Dublin, CaliforniaSat, Aug 21, 7:31 AM PDT · 16111 days ago · 10 km deep · 35 km away
29. 1.813 km SE of Livermore, CaliforniaSun, Aug 22, 1:55 AM PDT · 16110 days ago · 6 km deep · 55 km away
30. 1.714 km NNE of Morgan Hill, CaliforniaMon, Aug 23, 8:37 AM PDT · 16109 days ago · 7 km deep · 90 km away
31. 1.92 km NNW of Kensington, CaliforniaMon, Aug 23, 9:41 AM PDT · 16109 days ago · 9 km deep · 22 km away
32. 1.87 km E of East Foothills, CaliforniaMon, Aug 23, 5:21 PM PDT · 16108 days ago · 9 km deep · 71 km away
33. 3.98 km N of East Foothills, CaliforniaTue, Aug 24, 3:33 PM PDT · 16107 days ago · 6 km deep · 62 km away
34. 1.91 km N of Orinda, CaliforniaWed, Aug 25, 9:41 PM PDT · 16106 days ago · 6 km deep · 15 km away
35. 1.814 km E of East Foothills, CaliforniaFri, Aug 27, 10:48 AM PDT · 16105 days ago · 5 km deep · 73 km away
36. 1.710 km E of Blackhawk, CaliforniaFri, Aug 27, 5:56 PM PDT · 16104 days ago · 10 km deep · 28 km away
37. 3.812 km E of Blackhawk, CaliforniaFri, Aug 27, 6:03 PM PDT · 16104 days ago · 15 km deep · 29 km away
38. 2.311 km E of Blackhawk, CaliforniaFri, Aug 27, 7:11 PM PDT · 16104 days ago · 11 km deep · 29 km away
39. 2.611 km E of Blackhawk, CaliforniaFri, Aug 27, 9:52 PM PDT · 16104 days ago · 14 km deep · 29 km away
40. 1.610 km E of Blackhawk, CaliforniaSat, Aug 28, 5:12 AM PDT · 16104 days ago · 10 km deep · 28 km away
41. 1.810 km E of Blackhawk, CaliforniaSat, Aug 28, 5:50 AM PDT · 16104 days ago · 10 km deep · 28 km away
42. 1.55 km NNE of Kenwood, CaliforniaSat, Aug 28, 10:39 PM PDT · 16103 days ago · 5 km deep · 67 km away
43. 2.03 km NE of Fremont, CaliforniaMon, Aug 30, 12:21 AM PDT · 16102 days ago · 9 km deep · 46 km away
44. 1.65 km WSW of Green Valley, CaliforniaMon, Aug 30, 9:02 AM PDT · 16102 days ago · 5 km deep · 33 km away
45. 2.31 km SSE of Concord, CaliforniaTue, Aug 31, 11:40 AM PDT · 16101 days ago · 12 km deep · 3 km away
46. 1.70 km N of Pittsburg, CaliforniaWed, Sep 1, 2:04 AM PDT · 16100 days ago · 16 km deep · 15 km away
47. 1.72 km E of East Foothills, CaliforniaSun, Sep 5, 3:22 AM PDT · 16096 days ago · 4 km deep · 70 km away
48. 1.98 km ENE of Milpitas, CaliforniaSun, Sep 5, 7:55 PM PDT · 16095 days ago · 2 km deep · 61 km away
49. 2.30 km SE of Concord, CaliforniaMon, Sep 6, 4:15 AM PDT · 16095 days ago · 7 km deep · 2 km away
50. 1.710 km ENE of Blackhawk, CaliforniaMon, Sep 6, 9:45 AM PDT · 16095 days ago · 12 km deep · 27 km away
51. 1.64 km SW of Saint Helena, CaliforniaTue, Sep 7, 4:54 PM PDT · 16093 days ago · 5 km deep · 68 km away
52. 1.811 km NW of Moskowite Corner, CaliforniaWed, Sep 8, 12:48 AM PDT · 16093 days ago · -1 km deep · 63 km away
53. 1.515 km N of Morgan Hill, CaliforniaFri, Sep 10, 3:14 AM PDT · 16091 days ago · 6 km deep · 87 km away
54. 3.16 km ENE of East Foothills, CaliforniaSat, Sep 11, 4:59 AM PDT · 16090 days ago · 8 km deep · 69 km away
55. 1.86 km ENE of East Foothills, CaliforniaSat, Sep 11, 5:01 AM PDT · 16090 days ago · 7 km deep · 69 km away
56. 2.23 km WSW of Clayton, CaliforniaSat, Sep 11, 9:44 PM PDT · 16089 days ago · 13 km deep · 9 km away
57. 2.07 km NNE of East Foothills, CaliforniaWed, Sep 15, 9:11 AM PDT · 16086 days ago · 7 km deep · 63 km away
58. 2.411 km ESE of East Foothills, CaliforniaThu, Sep 16, 9:02 PM PDT · 16084 days ago · 8 km deep · 77 km away
59. 1.82 km SE of Larkfield-Wikiup, CaliforniaFri, Sep 17, 2:16 AM PDT · 16084 days ago · 5 km deep · 83 km away
60. 1.82 km ENE of Inverness, CaliforniaSat, Sep 18, 3:38 PM PDT · 16082 days ago · 2 km deep · 70 km away

The first 60 of 64.

Before

1. 1.715 km NNE of Morgan Hill, CaliforniaThu, Jul 22, 12:25 AM PDT · 16141 days ago · 6 km deep · 89 km away
2. 1.513 km NNW of Moskowite Corner, CaliforniaWed, Jul 21, 1:43 AM PDT · 16142 days ago · 3 km deep · 66 km away
3. 1.6Northern CaliforniaTue, Jul 20, 9:38 PM PDT · 16142 days ago · 2 km deep · 48 km away
4. 1.96 km S of Monument Hills, CaliforniaTue, Jul 20, 3:28 PM PDT · 16142 days ago · 6 km deep · 71 km away
5. 1.63 km ESE of Union City, CaliforniaTue, Jul 20, 8:00 AM PDT · 16143 days ago · 5 km deep · 44 km away
6. 1.64 km SW of Courtland, CaliforniaMon, Jul 19, 11:29 PM PDT · 16143 days ago · 1 km deep · 53 km away
7. 1.75 km NE of East Foothills, CaliforniaMon, Jul 19, 10:20 PM PDT · 16143 days ago · 6 km deep · 67 km away
8. 2.47 km SW of Brentwood, CaliforniaFri, Jul 16, 10:47 PM PDT · 16146 days ago · 7 km deep · 28 km away
9. 1.82 km SW of American Canyon, CaliforniaFri, Jul 16, 12:49 AM PDT · 16147 days ago · 9 km deep · 28 km away
10. 1.79 km ESE of East Foothills, CaliforniaMon, Jul 12, 7:57 PM PDT · 16150 days ago · 8 km deep · 75 km away
11. 1.65 km S of Port Costa, CaliforniaMon, Jul 12, 1:57 PM PDT · 16150 days ago · 10 km deep · 13 km away
12. 2.02 km ESE of Deer Park, CaliforniaMon, Jul 12, 9:19 AM PDT · 16151 days ago · 11 km deep · 69 km away
13. 1.612 km ENE of Angwin, CaliforniaMon, Jul 12, 3:29 AM PDT · 16151 days ago · -1 km deep · 73 km away
14. 2.85 km WSW of Moskowite Corner, CaliforniaSun, Jul 11, 4:19 PM PDT · 16151 days ago · 10 km deep · 53 km away
15. 1.6Northern CaliforniaSun, Jul 11, 3:09 PM PDT · 16151 days ago · 11 km deep · 37 km away
16. 2.43 km WSW of Moskowite Corner, CaliforniaSat, Jul 10, 11:38 PM PDT · 16152 days ago · 9 km deep · 52 km away
17. 1.68 km SSW of Livermore, CaliforniaFri, Jul 9, 10:29 PM PDT · 16153 days ago · 5 km deep · 48 km away
18. 1.710 km S of Muir Beach, CaliforniaThu, Jul 8, 4:11 PM PDT · 16154 days ago · 11 km deep · 51 km away
19. 1.73 km WSW of Oakville, CaliforniaWed, Jul 7, 5:18 PM PDT · 16155 days ago · 7 km deep · 60 km away
20. 1.71 km ENE of Pacheco, CaliforniaWed, Jul 7, 5:37 AM PDT · 16156 days ago · 13 km deep · 2 km away

From the USGS Earthquake Hazards Program and its partner networks, event nc1076517. Read Wed, Sep 30, 2026, 6:28 AM UTC.