Study on earthquake ground motion and geological structure in focal area of the 1999 Kocaeli earthquake.

在1999年科贾埃利地震和杜兹切地震期间，土耳其西北部的许多城市遭受严重破坏。虽然在该地区获得了几个强烈的地面运动记录，但在严重受损地区没有足够的记录来了解损坏的原因。此外，地下结构的数据，是非常重要的地面运动特性的评估没有很好地定义在重damage area.In这项研究中，我们进行了单点测量和阵列测量的微动在阿达帕扎里和Duzce地区估计的网站放大系数。首先，我们估计地下结构，从阵列和单点测量的微动数据。我们还对阿达帕扎里的小地震进行了地震观测。在阿达帕扎里的模型进行了检查，在旅行时间分析的初始P波和S波使用地震数据从小事件。然后，我们讨论了由估计模型计算的地震动放大特性。

Heavy damage was experienced in many cities in the north-western part of Turkey during the Kocaeli earthquake and the Duzce earthquake in 1999. Although several strong ground motion records were obtained in the area, there are not enough records in the heavy damage area to understand causes of the damage. Furthermore, subsurface structural data that are very important in assessment of ground motion characteristics are not well defined in the heavy damage area.In this study, we conducted single-point measurements and array measurements of microtremors in Adapazari and Duzce areas for estimation of site amplification factors. First, we estimated subsurface structure using microtremor data from the array and single-point measurements. We also conducted earthquake observation for small earthquakes in Adapazari. The models in Adapazari were examined in travel time analysis of initial P- and S-waves using earthquake data from small events. Then, we discussed ground motion amplification characteristics calculated from the estimated models.