This paper reports the results of a case study of the application of the microtremor exploration method in western Turkey. We have conducted microtremor surveys at strong motion stations in Aydin and Denizli provinces to derive shallow S-wave velocity profiles. Array records of vertical microtremor motion were acquired at 12 and 15 stations in Aydin and Denizli provinces, respectively. A spatial autocorrelation analysis was applied to the records to estimate Rayleigh wave phase velocities in the frequency range of 3–30 Hz. Then, the phase velocity dispersion at each station was inverted to a one-dimensional S-wave profile down to a maximum depth of about 50 m. The soil models at 5 and 11 stations in Aydin and Denizli provinces, respectively, have a bedrock with an S-wave velocity of 400–600 m/s at depths less than 10 m. The spatial distribution of average S-wave velocities in the top 30 m of the revealed profiles shows low values in the Büyük Menderes Graben and the Denizli Basin, and high values in the surrounding hill or mountain areas. We compared our S-wave profiles with those from previous surface-wave studies. S-wave velocities in shallow parts to a depth of 5–10 m are similar in the two studies. However, S-wave velocities in deep parts are different at some of the stations.

本文报告了在土耳其西部应用微震勘探方法的案例研究结果。我们在艾丁省和代尼兹利省的强震站进行了微震调查，以获得浅层 S 波速度剖面。分别在艾丁省和代尼兹利省的 12 和 15 个站获得了垂直微震运动的阵列记录。对记录应用空间自相关分析以估计 3-30 Hz 频率范围内的瑞利波相速度。然后，每个站的相速度色散被反转为一维 S 波剖面，最大深度约为 50 m。Aydin 和 Denizli 省的 5 个和 11 个站点的土壤模型分别在小于 10 m 的深度具有 S 波速度为 400-600 m/s 的基岩。所揭示剖面顶部 30 m 的平均 S 波速度空间分布显示，Büyük Menderes Graben 和 Denizli 盆地的值较低，而周围丘陵或山区的值较高。我们将我们的 S 波剖面与之前的表面波研究中的剖面进行了比较。在这两项研究中，浅层至 5-10 m 深度的 S 波速度相似。然而，在某些台站深部的 S 波速度是不同的。