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首页> 外文期刊>Pure and Applied Geophysics >Mapping the Palaeo-Piniada Valley, Central Greece, Based on Systematic Microtremor Analyses
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Mapping the Palaeo-Piniada Valley, Central Greece, Based on Systematic Microtremor Analyses

机译：根据系统的微调分析，绘制希腊中部古希腊山谷

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Abstract The application of seismic noise-based techniques has become particularly popular in the last decades, as they are not invasive and do not require large teams or expensive equipments. The Horizontal to Vertical Spectral Ratio (HVSR) is commonly used not only in seismic microzoning studies as far as from noise recording constraining the fundamental resonant frequency, but it is also possible to infer the depth of the bedrock knowing the average shear wave velocity of the overlying sedimentary cover, or viceversa (i.e. resonance equation). For the purposes of the present research, more than 300 single-station noise measurements were carried out across the Piniada Valley (Central Greece), along and between several transects planned roughly perpendicular to the mean valley trend. To understand the palaeogeographic and tectonic evolution of this area, we needed an estimation of the geometry at depth of the bedrock underlying the fluvial deposits of the present-day Pinios River. As a result, for each measured site, we calculated the depth of the bedrock and, afterwards, such values were opportunely interpolated for obtaining a 3D model of the palaeo-Piniada Valley documenting for the first time the recent (Late Quaternary) inversion of the topographic gradient.
机译：摘要在过去的几十年中，基于地震噪声技术的应用变得特别受欢迎，因为它们没有侵入性，不需要大型团队或昂贵的设备。水平至垂直光谱比（HVSR）通常不仅用于地震微微突出研究，而不是从噪声记录限制基本谐振频率，但也可以推断基岩的深度，了解平均剪切波速度覆盖沉积覆盖物，或伏维尔斯（即谐振方程）。出于本研究的目的，在小亚达谷（中央希腊）中，沿着大约垂直于平均谷趋势的几个横断面进行了300多个单站噪声测量。要了解这一领域的古地理和构造演进，我们需要估计天在本DAITIO河的河流沉积物的基岩深度的几何形状。结果，对于每个测量的场所，我们计算了基岩的深度，然后，这种价值是机会插值，以便在最近（晚季）反转的第一次（晚季）反转中获得帕拉诺-Piniada谷文档的3D模型。地形渐变。

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