Turkey earthquakes

M4.0 earthquake 2 km E of Köseköy, Turkey

A magnitude 4.0 earthquake struck 2 km E of Köseköy, Turkey on Sat, Sep 4, 1999, 1:30 PM GMT+3 (10:30 UTC), 17 km (11 mi) below the surface.

A larger quake followed: M5.9 4 km SE of Köseköy, Turkey. This one was a foreshock.

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Map

Where this earthquake was located, with the others nearby. Select one for its page.

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The earthquake

Magnitude
4.0 (mb, body-wave), light
Magnitude from
USGS National Earthquake Information Center
Local time
UTC
1999-09-04 10:30:46 UTC
Depth
17.3 km (10.7 mi), shallow
Epicenter
40.741° N, 30.032° E
Region
Turkey
Tsunami flag
No
Status
Reviewed by a seismologist

What happened

The USGS’s account of the effects of this earthquake.

Felt at Istanbul and Kocaeli.

From the USGS event page for usp0009e0f. U.S. Geological Survey text and figures are in the public domain.

Did you feel it?

No one has reported feeling this quake to the USGS.

Nearest places

Distance and direction from each place to the epicenter, with its forecast.

Nearby

Within 100 km, magnitude 1.5 and up: 89 in the 60 days after this one and 93 in the 30 days before it.

After

  1. 3.95 km N of Karapürçek, Turkey · 9889 days ago · 8 km deep · 44 km away
  2. 4.015 km SSE of Bahçecik, Turkey · 9889 days ago · 10 km deep · 22 km away
  3. 3.12 km N of Körfez, Turkey · 9889 days ago · 10 km deep · 22 km away
  4. 3.918 km SSW of Düzce, Turkey · 9889 days ago · 10 km deep · 91 km away
  5. 2.79 km SE of Adapazar?, Turkey · 9889 days ago · 12 km deep · 39 km away
  6. 2.94 km N of Ula?l?, Turkey · 9889 days ago · 10 km deep · 28 km away
  7. 3.825 km SE of Hendek, Turkey · 9889 days ago · 10 km deep · 78 km away
  8. 3.27 km SW of Düzce, Turkey · 9889 days ago · 14 km deep · 90 km away
  9. 3.216 km SW of Düzce, Turkey · 9889 days ago · 10 km deep · 83 km away
  10. 3.019 km ESE of Hendek, Turkey · 9887 days ago · 5 km deep · 78 km away
  11. 3.523 km SW of Düzce, Turkey · 9887 days ago · 8 km deep · 80 km away
  12. 5.07 km NNW of Koruköy, Turkey · 9886 days ago · 13 km deep · 75 km away
  13. 3.15 km E of Köseköy, Turkey · 9886 days ago · 10 km deep · 4 km away
  14. 3.22 km WNW of Hendek, Turkey · 9886 days ago · 5 km deep · 58 km away
  15. 3.88 km SSE of Geyve, Turkey · 9885 days ago · 10 km deep · 42 km away
  16. 2.81 km N of Yuvac?k, Turkey · 9885 days ago · 13 km deep · 7 km away
  17. 2.68 km NNE of Koruköy, Turkey · 9882 days ago · 6 km deep · 71 km away
  18. 5.94 km SE of Köseköy, Turkey · 9882 days ago · 13 km deep · 4 km away
  19. 2.78 km WNW of Sapanca, Turkey · 9882 days ago · 9 km deep · 12 km away
  20. 2.72 km SSW of Ç?narc?k, Turkey · 9881 days ago · 6 km deep · 79 km away
  21. 3.04 km NNE of Kocadere, Turkey · 9881 days ago · 13 km deep · 83 km away
  22. 2.96 km SSE of Sapanca, Turkey · 9880 days ago · 7 km deep · 25 km away
  23. 3.213 km ESE of Akyaz?, Turkey · 9880 days ago · 10 km deep · 64 km away
  24. 2.81 km N of Yuvac?k, Turkey · 9879 days ago · 13 km deep · 7 km away
  25. 2.50 km S of ?zmit, Turkey · 9879 days ago · 14 km deep · 9 km away
  26. 3.54 km SE of Pamukova, Turkey · 9879 days ago · 7 km deep · 32 km away
  27. 2.89 km N of Akyaz?, Turkey · 9878 days ago · 5 km deep · 50 km away
  28. 4.39 km WNW of Sapanca, Turkey · 9877 days ago · 10 km deep · 11 km away
  29. 4.55 km SSE of Yalova, Turkey · 9877 days ago · 10 km deep · 64 km away
  30. 2.72 km SSE of Ç?narc?k, Turkey · 9877 days ago · 6 km deep · 77 km away
  31. 2.98 km W of Adapazar?, Turkey · 9877 days ago · 13 km deep · 23 km away
  32. 2.62 km NE of Ç?narc?k, Turkey · 9876 days ago · 12 km deep · 76 km away
  33. 2.93 km SSE of Kocadere, Turkey · 9876 days ago · 22 km deep · 84 km away
  34. 2.81 km NW of ?zmit, Turkey · 9876 days ago · 9 km deep · 11 km away
  35. 2.82 km N of Yuvac?k, Turkey · 9876 days ago · 6 km deep · 7 km away
  36. 2.72 km SSW of Ç?narc?k, Turkey · 9876 days ago · 8 km deep · 79 km away
  37. 3.02 km SSE of Köseköy, Turkey · 9876 days ago · 17 km deep · 2 km away
  38. 2.711 km SSE of Adalar, Turkey · 9876 days ago · 21 km deep · 70 km away
  39. 2.810 km W of Sö?ütlü, Turkey · 9876 days ago · 13 km deep · 32 km away
  40. 3.13 km NNE of Koruköy, Turkey · 9876 days ago · 3 km deep · 73 km away
  41. 4.31 km WSW of Karapürçek, Turkey · 9875 days ago · 10 km deep · 43 km away
  42. 3.23 km WNW of Karapürçek, Turkey · 9875 days ago · 4 km deep · 41 km away
  43. 3.44 km NW of Karapürçek, Turkey · 9875 days ago · 5 km deep · 40 km away
  44. 2.71 km WSW of Ç?narc?k, Turkey · 9875 days ago · 6 km deep · 79 km away
  45. 3.31 km S of Derince, Turkey · 9872 days ago · 8 km deep · 19 km away
  46. 2.63 km NE of Körfez, Turkey · 9872 days ago · 13 km deep · 20 km away
  47. 3.89 km WNW of Adapazar?, Turkey · 9871 days ago · 10 km deep · 23 km away
  48. 3.411 km SSE of Adalar, Turkey · 9870 days ago · 9 km deep · 71 km away
  49. 3.21 km SSE of Karapürçek, Turkey · 9870 days ago · 5 km deep · 46 km away
  50. 3.98 km SSE of Küplü, Turkey · 9869 days ago · 10 km deep · 79 km away
  51. 2.72 km WSW of Umurbey, Turkey · 9869 days ago · 10 km deep · 83 km away
  52. 3.34 km NNW of Hal?dere, Turkey · 9868 days ago · 6 km deep · 25 km away
  53. 2.93 km WNW of Köseköy, Turkey · 9868 days ago · 5 km deep · 5 km away
  54. 5.28 km NNW of Ta?köprü, Turkey · 9866 days ago · 10 km deep · 58 km away
  55. 2.85 km WNW of Akyaz?, Turkey · 9862 days ago · 13 km deep · 45 km away
  56. 2.86 km WSW of Hendek, Turkey · 9862 days ago · 9 km deep · 55 km away
  57. 2.72 km NE of Körfez, Turkey · 9862 days ago · 6 km deep · 20 km away
  58. 2.712 km SW of Düzce, Turkey · 9862 days ago · 6 km deep · 85 km away
  59. 2.85 km WNW of Düzce, Turkey · 9862 days ago · 8 km deep · 91 km away
  60. 2.71 km N of Kullar, Turkey · 9862 days ago · 15 km deep · 4 km away

The first 60 of 89.

Before

  1. 4.08 km S of Karapürçek, Turkey · 9893 days ago · 10 km deep · 47 km away
  2. 3.45 km W of Hendek, Turkey · 9893 days ago · 10 km deep · 56 km away
  3. 3.97 km SW of Kad?köy, Turkey · 9894 days ago · 10 km deep · 76 km away
  4. 4.29 km NNE of Küçükkumla, Turkey · 9894 days ago · 10 km deep · 79 km away
  5. 3.07 km N of Çiftlikköy, Turkey · 9895 days ago · 5 km deep · 59 km away
  6. 4.51 km NNE of Kar??yaka, Turkey · 9895 days ago · 10 km deep · 8 km away
  7. 5.22 km NNE of Kar??yaka, Turkey · 9895 days ago · 10 km deep · 8 km away
  8. 3.510 km N of Yalova, Turkey · 9896 days ago · 9 km deep · 65 km away
  9. 3.07 km NNE of Küçükkumla, Turkey · 9896 days ago · 1 km deep · 78 km away
  10. 3.21 km SW of Ç?narc?k, Turkey · 9896 days ago · 8 km deep · 78 km away
  11. 4.212 km S of Düzce, Turkey · 9897 days ago · 10 km deep · 96 km away
  12. 3.57 km NW of ?zmit, Turkey · 9898 days ago · 10 km deep · 16 km away
  13. 4.80 km ENE of Köseköy, Turkey · 9900 days ago · 10 km deep · 1 km away
  14. 4.29 km WSW of Sapanca, Turkey · 9901 days ago · 10 km deep · 14 km away
  15. 4.14 km S of Koruköy, Turkey · 9902 days ago · 10 km deep · 75 km away
  16. 3.923 km SW of Düzce, Turkey · 9902 days ago · 10 km deep · 81 km away
  17. 3.8Western Turkey · 9902 days ago · 10 km deep · 67 km away
  18. 4.513 km ESE of Akyaz?, Turkey · 9904 days ago · 10 km deep · 64 km away
  19. 3.97 km SSW of Kad?köy, Turkey · 9904 days ago · 10 km deep · 75 km away
  20. 3.81 km ENE of Yalova, Turkey · 9905 days ago · 10 km deep · 63 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event usp0009e0f. Read Sat, Oct 3, 2026, 5:58 AM UTC.