M3.9 earthquake 4 km NNE of Kocadere, Turkey

Magnitude

3.9 (Md, duration), minor

Magnitude from

USGS National Earthquake Information Center

Local time

Mon, Oct 11, 1999, 5:47 AM GMT+3

UTC

1999-10-11 02:47:47 UTC

Depth

0.1 km (0.1 mi), shallow

Epicenter

40.667° N, 29.048° E

Region

Turkey

Tsunami flag

No

Status

Reviewed by a seismologist

• Yalova, TurkeyPopulation 71,289. Forecast19 kmW
• Maltepe, TurkeyPopulation 427,040. Forecast31 kmSSW
• Istanbul, TurkeyPopulation 15,701,602. Forecast39 kmSSE

After

1. 3.314 km NNW of Sapanca, TurkeySun, Oct 17, 1:39 PM GMT+3 · 9848 days ago · 10 km deep · 98 km away
2. 2.95 km NNE of Koruköy, TurkeyTue, Oct 19, 10:27 PM GMT+3 · 9846 days ago · 9 km deep · 11 km away
3. 4.611 km SSW of Adalar, TurkeyThu, Oct 21, 2:08 AM GMT+3 · 9845 days ago · 10 km deep · 12 km away
4. 2.52 km NE of Umurbey, TurkeySat, Oct 23, 1:02 AM GMT+3 · 9843 days ago · 18 km deep · 30 km away
5. 2.91 km WSW of Ç?narc?k, TurkeySat, Oct 23, 5:04 AM GMT+3 · 9842 days ago · 17 km deep · 6 km away
6. 3.16 km NNE of Koruköy, TurkeySat, Oct 23, 5:49 AM GMT+3 · 9842 days ago · 7 km deep · 14 km away
7. 2.710 km N of Balç?k, TurkeySun, Oct 24, 6:00 PM GMT+3 · 9841 days ago · 17 km deep · 47 km away
8. 3.07 km NW of Orhangazi, TurkeyWed, Oct 27, 8:32 AM GMT+3 · 9838 days ago · 6 km deep · 22 km away
9. 2.91 km E of Orhangazi, TurkeyFri, Oct 29, 1:03 PM GMT+3 · 9836 days ago · 15 km deep · 31 km away
10. 3.04 km NNW of Yenice, TurkeyFri, Oct 29, 4:31 PM GMT+3 · 9836 days ago · 8 km deep · 68 km away
11. 2.72 km WSW of Ç?narc?k, TurkeySun, Oct 31, 6:11 AM GMT+2 · 9834 days ago · 19 km deep · 5 km away
12. 2.75 km NW of Orhangazi, TurkeyMon, Nov 1, 12:14 AM GMT+2 · 9834 days ago · 11 km deep · 24 km away
13. 2.77 km W of Küçükkumla, TurkeyFri, Nov 5, 9:55 AM GMT+2 · 9829 days ago · 8 km deep · 21 km away
14. 3.26 km NNW of Koruköy, TurkeyFri, Nov 5, 10:35 AM GMT+2 · 9829 days ago · 8 km deep · 8 km away
15. 3.86 km NNW of Sapanca, TurkeySun, Nov 7, 1:15 PM GMT+2 · 9827 days ago · 10 km deep · 100 km away
16. 2.61 km ESE of Ç?narc?k, TurkeyFri, Nov 12, 10:26 AM GMT+2 · 9822 days ago · 22 km deep · 9 km away
17. 2.914 km SSE of Beylikdüzü, TurkeyFri, Nov 12, 11:15 AM GMT+2 · 9822 days ago · 5 km deep · 37 km away
18. 3.36 km N of Koruköy, TurkeySat, Nov 13, 5:16 PM GMT+2 · 9821 days ago · 6 km deep · 10 km away
19. 3.32 km SSE of Koruköy, TurkeySat, Nov 13, 11:33 PM GMT+2 · 9821 days ago · 5 km deep · 11 km away
20. 3.25 km ESE of Mudanya, TurkeySat, Nov 13, 11:52 PM GMT+2 · 9821 days ago · 10 km deep · 35 km away
21. 2.72 km ENE of Koruköy, TurkeySun, Nov 14, 5:24 AM GMT+2 · 9820 days ago · 3 km deep · 11 km away
22. 3.43 km SE of Koruköy, TurkeySun, Nov 14, 7:17 AM GMT+2 · 9820 days ago · 17 km deep · 12 km away
23. 2.82 km E of Koruköy, TurkeySun, Nov 14, 7:43 AM GMT+2 · 9820 days ago · 3 km deep · 12 km away

Before

1. 2.52 km WSW of Ç?narc?k, TurkeySun, Oct 10, 8:36 PM GMT+3 · 9855 days ago · 6 km deep · 5 km away
2. 2.78 km SW of Kocadere, TurkeySun, Oct 10, 5:46 PM GMT+3 · 9855 days ago · 5 km deep · 12 km away
3. 2.75 km NNE of Kocadere, TurkeySun, Oct 10, 2:00 PM GMT+3 · 9855 days ago · 6 km deep · 2 km away
4. 2.92 km SSE of Kocadere, TurkeySun, Oct 3, 10:24 PM GMT+3 · 9862 days ago · 9 km deep · 6 km away
5. 3.11 km E of Yuvac?k, TurkeySun, Oct 3, 9:17 PM GMT+3 · 9862 days ago · 10 km deep · 79 km away
6. 3.12 km WNW of ?zmit, TurkeySun, Oct 3, 7:19 PM GMT+3 · 9862 days ago · 13 km deep · 73 km away
7. 2.71 km N of Kullar, TurkeySun, Oct 3, 6:58 PM GMT+3 · 9862 days ago · 15 km deep · 80 km away
8. 2.72 km NE of Körfez, TurkeySun, Oct 3, 3:35 AM GMT+3 · 9862 days ago · 6 km deep · 65 km away
9. 5.28 km NNW of Ta?köprü, TurkeyWed, Sep 29, 3:13 AM GMT+3 · 9866 days ago · 10 km deep · 26 km away
10. 2.93 km WNW of Köseköy, TurkeyMon, Sep 27, 7:41 AM GMT+3 · 9868 days ago · 5 km deep · 78 km away
11. 3.34 km NNW of Hal?dere, TurkeyMon, Sep 27, 2:44 AM GMT+3 · 9868 days ago · 6 km deep · 58 km away
12. 2.72 km WSW of Umurbey, TurkeySun, Sep 26, 5:03 PM GMT+3 · 9869 days ago · 10 km deep · 31 km away
13. 3.411 km SSE of Adalar, TurkeyFri, Sep 24, 11:10 PM GMT+3 · 9871 days ago · 9 km deep · 17 km away
14. 2.63 km NE of Körfez, TurkeyThu, Sep 23, 10:19 AM GMT+3 · 9872 days ago · 13 km deep · 65 km away
15. 3.31 km S of Derince, TurkeyThu, Sep 23, 9:24 AM GMT+3 · 9872 days ago · 8 km deep · 65 km away
16. 2.71 km WSW of Ç?narc?k, TurkeyMon, Sep 20, 3:16 AM GMT+3 · 9875 days ago · 6 km deep · 6 km away
17. 3.13 km NNE of Koruköy, TurkeySun, Sep 19, 9:19 PM GMT+3 · 9876 days ago · 3 km deep · 11 km away
18. 2.711 km SSE of Adalar, TurkeySun, Sep 19, 7:31 PM GMT+3 · 9876 days ago · 21 km deep · 18 km away
19. 3.02 km SSE of Köseköy, TurkeySun, Sep 19, 6:42 PM GMT+3 · 9876 days ago · 17 km deep · 82 km away
20. 2.72 km SSW of Ç?narc?k, TurkeySun, Sep 19, 5:26 AM GMT+3 · 9876 days ago · 8 km deep · 7 km away

From the USGS Earthquake Hazards Program and its partner networks, event usp0009fpt. Read Sat, Oct 3, 2026, 10:52 AM UTC.