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首页> 外文期刊>Journal of Earthquake Engineering >Database for Earthquake Strong Motion Studies in Italy
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Database for Earthquake Strong Motion Studies in Italy

机译:意大利地震强震研究数据库

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摘要

We describe an Italian database of strong ground motion recordings and databanks delineating conditions at the instrument sites and characteristics of the seismic sources. The strong motion database consists of 247 corrected recordings from 89 earthquakes and 101 recording stations. Uncorrected recordings were drawn from public web sites and processed on a record-by-record basis using a procedure utilized in the Next-Generation Attenuation (NGA) project to remove instrument resonances, minimize noise effects through low- and high-pass filtering, and baseline correction. The number of available uncorrected recordings was reduced by 52% (mostly because of s-triggers) to arrive at the 247 recordings in the database. The site databank includes for every recording site the surface geology, a measurement or estimate of average shear wave velocity in the upper 30 m (V_(s30)), and information on instrument housing. Of the 89 sites, 39 have on-sile velocity measurements (17 of which were performed as part of this study using SASW techniques). For remaining sites, we estimate V_(s30) based on measurements on similar geologic conditions where available. Where no local velocity measurements are available, correlations with surface geology are used. Source parameters are drawn from databanks maintained (and recently updated) by Istituto Nazionale di Geofisica e Vulcanologia and include hypocenter location and magnitude for small events (M < ~5.5) and finite source parameters for larger events.
机译:我们描述了一个意大利的强地面运动记录数据库和数据库,描述了仪器现场的状况和地震震源的特征。强运动数据库包含来自89个地震的101个记录站的247个校正记录。未经校正的录音是从公共网站上提取的,并使用下一代衰减(NGA)项目中使用的程序逐条记录地进行处理,以消除乐器共振,通过低通和高通滤波将噪声影响最小化,以及基线校正。可用的未校正记录的数量减少了52%(主要是由于s触发器),以达到数据库中的247条记录。站点数据库包括每个记录站点的表面地质情况,上部30 m(V_(s30))中的平均剪切波速度的测量值或估计值以及仪器外壳的信息。在这89个站点中,有39个进行了船上速度测量(作为本研究的一部分,使用SASW技术进行了其中的17个测量)。对于其余站点,我们根据在可用的相似地质条件下的测量值来估算V_(s30)。如果没有局部速度测量可用,则使用与地表地质的相关性。震源参数取自地理信息安全研究所维护(最新更新)的数据库,其中包括小震源(M <〜5.5)的震中位置和震级,大震源的震源参数有限。

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