Özet:

In this study, using natural noise data of a 1 week length that is constantly recorded by the local stages of earthquake, the first results of the Rayleigh surface wave group speeds of different depths were obtained. For this purpose, 20 stations data were analyzed and group wave dispersion curves were calculated in different periods for 12 stations pairs. The group wave speeds of the BYR-KSK station pair in the north, which is built on andezite units, were observed at 0.5 km/s (T=0.6 s) in areas near the surface and at 0.8 km/s (T>1.5 s) in depths. The KSK-MVS station in the south of the Gulf is for thick depths (the increase in speeds according to this path has been detected after the period value of T1.2 s (0.7 km/s). Similar analyses were repeated for several station pairs located in the east and south of the Gulf, and the group speeds were found to be lower in the south, compared to the north of the Gulf. The profound change of speeds is also maped for different periods.

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