M3.9 earthquake 23 km SW of Düzce, Turkey

Magnitude

3.9 (mb, body-wave), minor

Magnitude from

USGS National Earthquake Information Center

Local time

Tue, Aug 24, 1999, 12:44 AM GMT+3

UTC

1999-08-23 21:44:27 UTC

Depth

10.0 km (6.2 mi), shallow

Epicenter

40.675° N, 30.991° E

Region

Turkey

Tsunami flag

No

Status

Reviewed by a seismologist

Depth from

OPERATOR_ASSIGNED

• Düzce, TurkeyPopulation 194,097. Forecast23 kmSW
• Bursa, TurkeyPopulation 3,101,833. Forecast172 kmENE

After

1. 4.29 km WSW of Sapanca, TurkeyTue, Aug 24, 9:58 PM GMT+3 · 9901 days ago · 10 km deep · 70 km away
2. 4.80 km ENE of Köseköy, TurkeyThu, Aug 26, 8:49 PM GMT+3 · 9899 days ago · 10 km deep · 83 km away
3. 3.57 km NW of ?zmit, TurkeySat, Aug 28, 11:27 AM GMT+3 · 9898 days ago · 10 km deep · 96 km away
4. 4.212 km S of Düzce, TurkeySun, Aug 29, 1:15 PM GMT+3 · 9896 days ago · 10 km deep · 16 km away
5. 5.22 km NNE of Kar??yaka, TurkeyTue, Aug 31, 11:10 AM GMT+3 · 9895 days ago · 10 km deep · 88 km away
6. 4.51 km NNE of Kar??yaka, TurkeyTue, Aug 31, 11:33 AM GMT+3 · 9895 days ago · 10 km deep · 88 km away
7. 3.45 km W of Hendek, TurkeyThu, Sep 2, 2:18 PM GMT+3 · 9892 days ago · 10 km deep · 30 km away
8. 4.08 km S of Karapürçek, TurkeyThu, Sep 2, 5:25 PM GMT+3 · 9892 days ago · 10 km deep · 41 km away
9. 4.02 km E of Köseköy, TurkeySat, Sep 4, 1:30 PM GMT+3 · 9890 days ago · 17 km deep · 81 km away
10. 3.95 km N of Karapürçek, TurkeySun, Sep 5, 10:52 PM GMT+3 · 9889 days ago · 8 km deep · 38 km away
11. 4.015 km SSE of Bahçecik, TurkeyMon, Sep 6, 9:33 AM GMT+3 · 9889 days ago · 10 km deep · 86 km away
12. 3.918 km SSW of Düzce, TurkeyMon, Sep 6, 9:59 AM GMT+3 · 9889 days ago · 10 km deep · 10 km away
13. 2.79 km SE of Adapazar?, TurkeyMon, Sep 6, 10:15 AM GMT+3 · 9889 days ago · 12 km deep · 42 km away
14. 3.825 km SE of Hendek, TurkeyMon, Sep 6, 12:59 PM GMT+3 · 9889 days ago · 10 km deep · 7 km away
15. 3.27 km SW of Düzce, TurkeyMon, Sep 6, 2:50 PM GMT+3 · 9888 days ago · 14 km deep · 16 km away
16. 3.216 km SW of Düzce, TurkeyMon, Sep 6, 2:51 PM GMT+3 · 9888 days ago · 10 km deep · 8 km away
17. 3.019 km ESE of Hendek, TurkeyWed, Sep 8, 1:14 PM GMT+3 · 9886 days ago · 5 km deep · 8 km away
18. 3.523 km SW of Düzce, TurkeyWed, Sep 8, 4:10 PM GMT+3 · 9886 days ago · 8 km deep · 1 km away
19. 3.15 km E of Köseköy, TurkeyThu, Sep 9, 8:41 AM GMT+3 · 9886 days ago · 10 km deep · 78 km away
20. 3.22 km WNW of Hendek, TurkeyThu, Sep 9, 3:56 PM GMT+3 · 9885 days ago · 5 km deep · 27 km away
21. 3.88 km SSE of Geyve, TurkeyThu, Sep 9, 11:21 PM GMT+3 · 9885 days ago · 10 km deep · 62 km away
22. 2.81 km N of Yuvac?k, TurkeyFri, Sep 10, 8:50 AM GMT+3 · 9885 days ago · 13 km deep · 87 km away
23. 5.94 km SE of Köseköy, TurkeyMon, Sep 13, 2:55 PM GMT+3 · 9881 days ago · 13 km deep · 80 km away
24. 2.78 km WNW of Sapanca, TurkeyMon, Sep 13, 4:10 PM GMT+3 · 9881 days ago · 9 km deep · 69 km away
25. 2.96 km SSE of Sapanca, TurkeyWed, Sep 15, 12:02 PM GMT+3 · 9880 days ago · 7 km deep · 60 km away
26. 3.213 km ESE of Akyaz?, TurkeyWed, Sep 15, 12:33 PM GMT+3 · 9880 days ago · 10 km deep · 18 km away
27. 2.81 km N of Yuvac?k, TurkeyThu, Sep 16, 8:50 AM GMT+3 · 9879 days ago · 13 km deep · 87 km away
28. 2.50 km S of ?zmit, TurkeyThu, Sep 16, 4:10 PM GMT+3 · 9878 days ago · 14 km deep · 90 km away
29. 3.54 km SE of Pamukova, TurkeyThu, Sep 16, 8:58 PM GMT+3 · 9878 days ago · 7 km deep · 69 km away
30. 2.89 km N of Akyaz?, TurkeyFri, Sep 17, 3:47 PM GMT+3 · 9877 days ago · 5 km deep · 32 km away
31. 4.39 km WNW of Sapanca, TurkeyFri, Sep 17, 10:50 PM GMT+3 · 9877 days ago · 10 km deep · 71 km away
32. 2.98 km W of Adapazar?, TurkeySat, Sep 18, 8:52 PM GMT+3 · 9876 days ago · 13 km deep · 59 km away
33. 2.81 km NW of ?zmit, TurkeySun, Sep 19, 1:13 AM GMT+3 · 9876 days ago · 9 km deep · 91 km away
34. 2.82 km N of Yuvac?k, TurkeySun, Sep 19, 4:13 AM GMT+3 · 9876 days ago · 6 km deep · 87 km away
35. 3.02 km SSE of Köseköy, TurkeySun, Sep 19, 6:42 PM GMT+3 · 9875 days ago · 17 km deep · 82 km away
36. 2.810 km W of Sö?ütlü, TurkeySun, Sep 19, 8:59 PM GMT+3 · 9875 days ago · 13 km deep · 59 km away
37. 4.31 km WSW of Karapürçek, TurkeySun, Sep 19, 11:26 PM GMT+3 · 9875 days ago · 10 km deep · 39 km away
38. 3.23 km WNW of Karapürçek, TurkeySun, Sep 19, 11:30 PM GMT+3 · 9875 days ago · 4 km deep · 41 km away
39. 3.44 km NW of Karapürçek, TurkeyMon, Sep 20, 3:07 AM GMT+3 · 9875 days ago · 5 km deep · 41 km away
40. 3.31 km S of Derince, TurkeyThu, Sep 23, 9:24 AM GMT+3 · 9872 days ago · 8 km deep · 100 km away
41. 3.89 km WNW of Adapazar?, TurkeyFri, Sep 24, 4:44 PM GMT+3 · 9870 days ago · 10 km deep · 60 km away
42. 3.21 km SSE of Karapürçek, TurkeySat, Sep 25, 10:04 AM GMT+3 · 9870 days ago · 5 km deep · 38 km away
43. 2.93 km WNW of Köseköy, TurkeyMon, Sep 27, 7:41 AM GMT+3 · 9868 days ago · 5 km deep · 86 km away
44. 2.85 km WNW of Akyaz?, TurkeySun, Oct 3, 1:14 AM GMT+3 · 9862 days ago · 13 km deep · 36 km away
45. 2.86 km WSW of Hendek, TurkeySun, Oct 3, 2:02 AM GMT+3 · 9862 days ago · 9 km deep · 28 km away
46. 2.712 km SW of Düzce, TurkeySun, Oct 3, 3:46 AM GMT+3 · 9862 days ago · 6 km deep · 12 km away
47. 2.85 km WNW of Düzce, TurkeySun, Oct 3, 7:16 AM GMT+3 · 9862 days ago · 8 km deep · 23 km away
48. 2.71 km N of Kullar, TurkeySun, Oct 3, 6:58 PM GMT+3 · 9861 days ago · 15 km deep · 85 km away
49. 3.12 km WNW of ?zmit, TurkeySun, Oct 3, 7:19 PM GMT+3 · 9861 days ago · 13 km deep · 93 km away
50. 3.11 km E of Yuvac?k, TurkeySun, Oct 3, 9:17 PM GMT+3 · 9861 days ago · 10 km deep · 85 km away
51. 3.117 km WSW of Düzce, TurkeyTue, Oct 5, 8:25 PM GMT+3 · 9859 days ago · 9 km deep · 11 km away
52. 3.19 km SW of Düzce, TurkeyMon, Oct 11, 7:59 AM GMT+3 · 9854 days ago · 2 km deep · 14 km away
53. 3.65 km S of Adapazar?, TurkeyThu, Oct 14, 5:20 PM GMT+3 · 9850 days ago · 0 km deep · 50 km away
54. 3.314 km NNW of Sapanca, TurkeySun, Oct 17, 1:39 PM GMT+3 · 9847 days ago · 10 km deep · 69 km away
55. 2.86 km NE of Akyaz?, TurkeyTue, Oct 19, 5:19 PM GMT+3 · 9845 days ago · 5 km deep · 27 km away
56. 3.017 km ESE of Hendek, TurkeyTue, Oct 19, 11:33 PM GMT+3 · 9845 days ago · 13 km deep · 8 km away
57. 3.25 km W of Düzce, TurkeyFri, Oct 22, 1:07 AM GMT+3 · 9843 days ago · 12 km deep · 20 km away

Before

1. 3.8Western TurkeyMon, Aug 23, 11:35 PM GMT+3 · 9902 days ago · 10 km deep · 15 km away
2. 4.513 km ESE of Akyaz?, TurkeySun, Aug 22, 5:30 PM GMT+3 · 9903 days ago · 10 km deep · 19 km away
3. 4.27 km SE of Hendek, TurkeyFri, Aug 20, 6:59 PM GMT+3 · 9905 days ago · 10 km deep · 17 km away
4. 4.313 km SSE of Akyaz?, TurkeyFri, Aug 20, 1:00 PM GMT+3 · 9906 days ago · 10 km deep · 29 km away
5. 4.10 km SE of Kullar, TurkeyFri, Aug 20, 3:03 AM GMT+3 · 9906 days ago · 10 km deep · 84 km away
6. 4.015 km N of Nall?han, TurkeyThu, Aug 19, 9:34 PM GMT+3 · 9906 days ago · 10 km deep · 48 km away
7. 4.714 km ESE of Akyaz?, TurkeyThu, Aug 19, 4:04 PM GMT+3 · 9906 days ago · 10 km deep · 20 km away
8. 4.123 km NW of Mudurnu, TurkeyThu, Aug 19, 12:15 AM GMT+3 · 9907 days ago · 10 km deep · 5 km away
9. 4.09 km NW of Hendek, TurkeyWed, Aug 18, 6:34 PM GMT+3 · 9907 days ago · 10 km deep · 34 km away
10. 3.97 km E of Akyaz?, TurkeyWed, Aug 18, 2:30 PM GMT+3 · 9907 days ago · 10 km deep · 24 km away
11. 3.813 km ESE of Akyaz?, TurkeyWed, Aug 18, 8:59 AM GMT+3 · 9908 days ago · 10 km deep · 20 km away
12. 4.121 km SE of Hendek, TurkeyWed, Aug 18, 4:04 AM GMT+3 · 9908 days ago · 10 km deep · 7 km away
13. 4.28 km NNW of Akyaz?, TurkeyWed, Aug 18, 1:12 AM GMT+3 · 9908 days ago · 6 km deep · 35 km away
14. 4.16 km ENE of Köseköy, TurkeyWed, Aug 18, 12:47 AM GMT+3 · 9908 days ago · 10 km deep · 77 km away
15. 3.92 km ESE of Akyaz?, TurkeyWed, Aug 18, 12:14 AM GMT+3 · 9908 days ago · 10 km deep · 29 km away
16. 3.810 km S of Adapazar?, TurkeyTue, Aug 17, 8:09 PM GMT+3 · 9908 days ago · 10 km deep · 48 km away
17. 3.76 km SSE of Kaynarca, TurkeyTue, Aug 17, 5:35 PM GMT+3 · 9908 days ago · 10 km deep · 64 km away
18. 3.95 km S of Yuvac?k, TurkeyTue, Aug 17, 4:10 PM GMT+3 · 9908 days ago · 10 km deep · 87 km away
19. 4.47 km SSE of Akyaz?, TurkeyTue, Aug 17, 2:58 PM GMT+3 · 9908 days ago · 10 km deep · 28 km away
20. 4.07 km NNE of Pamukova, TurkeyTue, Aug 17, 2:36 PM GMT+3 · 9908 days ago · 10 km deep · 68 km away

From the USGS Earthquake Hazards Program and its partner networks, event usp0009dhz. Read Fri, Oct 2, 2026, 9:43 PM UTC.