• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Pure and Applied Geophysics >VS Profiles from Noise Cross Correlation at Local and Small Scale
【24h】

VS Profiles from Noise Cross Correlation at Local and Small Scale

机译：局部和小范围噪声互相关的VS轮廓

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Ambient noise measurements have been performed at local and small scales in the Neapolitan and surrounding areas (Campania, southern Italy) by employing two broad-band Kinemetrics Q330 stations, equipped with Episensor ES-T three component accelerometers. In both experiments frequency time analysis (FTAN method) has been performed on the vertical and radial components of noise cross correlations to retrieve the Rayleigh wave dispersion (Green's function). At local scale, over an interstation distance of about 26 km, the group velocity dispersion values have been compared with those obtained from FTAN analysis on recordings of two earthquakes with similar path. At small scale, measurements have been carried out over an interstation distance of about 440 m in the public gardens of Scampia, the northernmost quarter of Naples. The Rayleigh wave group velocity dispersion data obtained from noise cross correlation, have been combined with those from active seismic experiment along the same alignment, but shorter (120 m offset). The non linear inversion of such a dispersion curve has allowed the definition of V_S models to depths of 100 m, in agreement with nearby stratigraphy. Moreover, a good agreement has resulted for the resonance frequency among the H/V ratio, the ellipticity of the fundamental mode computed for the chosen VS model, and the average two-dimensional (2D) spectral amplification computed along a cross section representative of the Scampia quarter.
机译：通过使用两个配备了Episensor ES-T三分量加速度计的宽带Kinemetrics Q330站，在那不勒斯及周边地区（意大利南部坎帕尼亚）进行了局部和小规模的环境噪声测量。在两个实验中，都对噪声互相关的垂直和径向分量执行了频率时间分析（FTAN方法），以获取瑞利波频散（格林函数）。在局部范围内，在大约26 km的站间距离上，已将群速度散布值与通过FTAN分析获得的相似路径两次地震记录的值进行了比较。在那不勒斯最北端的Scampia的公共花园中，已经进行了约440 m的站间距离的小规模测量。通过噪声互相关获得的瑞利波群速度色散数据已与来自主动地震实验的数据沿相同的方向进行了组合，但更短（偏移为120 m）。这种色散曲线的非线性反演使V_S模型的定义可以达到100 m的深度，与附近的地层一致。此外，在H / V比，为所选VS模型计算的基本模式的椭圆率，以及沿代表该截面的横截面计算的平均二维（2D）光谱放大率之间的共振频率方面，已经取得了很好的一致性。 Scampia季度。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号