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Seismic susceptibility map for Cascais County (Portugal): a simple approach

机译：卡斯卡伊斯县（葡萄牙）的地震敏感性图：一种简单的方法

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摘要

Cascais County, located in the central part of the Portuguese mainland, is a very attractive place due to its interesting and recognized natural and cultural heritage. Leisure and cultural activities attract many people every day, which leads us to the importance of safeguarding from possible risks. Taking into account the historical seismicity, in particular the damage caused by the 1755 earthquake and tsunami in Cascais, it becomes clear that the seismic risk is relevant in Cascais County. In this paper, we present a methodology to obtain a seismic susceptibility map based on a soil characterization study using the refraction microtremor technique and ambient vibration measures (H/V Nakamura technique). This kind of map gives a detailed picture of the zones that can suffer larger seismic ground motion that can be easily consulted and understood by technicians, making it a suitable work tool. Considering the extent and geological diversity of the area, we selected some representative sites to perform the experiments, taking into consideration the different surface geological formations, paying particular attention to situations with the greatest potential risk.
机译：卡斯卡伊斯县（Cascais County）位于葡萄牙大陆的中部，由于其有趣且公认的自然和文化遗产，非常吸引人。休闲和文化活动每天吸引着许多人，这使我们意识到了防范潜在风险的重要性。考虑到历史地震性，特别是卡斯卡伊斯1755年地震和海啸造成的破坏，显然卡斯卡伊斯县的地震风险是相关的。在本文中，我们提出了一种方法，该方法基于土壤的表征研究，使用折射微震技术和环境振动措施（H / V Nakamura技术）来获得地震敏感性图。此类地图会详细显示可能遭受较大地震地面运动的区域，技术人员可以轻松查看和了解，从而使其成为合适的作业工具。考虑到该地区的范围和地质多样性，我们选择了一些代表性地点进行实验，同时考虑了不同的地表地质构造，并特别注意了潜在风险最大的情况。

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