The Urban Seismic Observatory of Catania (Italy): A Real-Time Seismic Monitoring at Urban Scale
The Urban Seismic Observatory of Catania (Italy): A Real-Time Seismic Monitoring at Urban Scale
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DOI：
10.3390/rs14112583
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发表时间：
2022-06-01
期刊：
影响因子：
5
通讯作者：
Torrisi, Orazio
中科院分区：
文献类型：
--
作者：
Patane, Domenico;Tusa, Giuseppina;Torrisi, Orazio
我们描述了意大利第一个密集的实时城市地震加速度计网络，名为OSU-CT，位于卡塔尼亚的历史中心。这座城市位于整个意大利领土上最危险，脆弱和地震暴露的地区。OSU-CT是在EWAS“文化遗产早期预警系统”项目内规划和实施的，旨在快速评估地震造成的损害和测试现场地震早期预警系统。OSU-CT主要基于低成本仪器，通过使用尖端技术和具有出色分辨率和低噪声的数字MEMS（微机电系统）三轴加速度计来实现。40个预定车站中的20个已经在重要的历史性公共建筑的一楼设立。为了评估地震预警（EEW）现场系统的性能，我们还安装了宽带速度计（ETL 3D/5S）在三个大厦选择作为测试场地，这将是仪器化的结构健康监测（SHM）。除了对开发的仪器进行多项实验室和现场验证测试外，OSU-CT的有效运行测试是2021年12月23日在卡塔尼亚西南以西16公里处发生的M-w 4. 3地震。峰值地面加速度（4.956加仑至39.360加仑）记录的网络允许获得第一个城市地震图，并确定可靠的地面运动分布在历史中心的城市，有用的历史建筑物的脆弱性研究。
We describe the first dense real-time urban seismic-accelerometric network in Italy, named OSU-CT, located in the historic center of Catania. The city lies in the region with the greatest danger, vulnerability, and earthquake exposure in the entire Italian territory. OSU-CT was planned and realized within the project called EWAS "an Early WArning System for cultural heritage", aimed at the rapid assessment of earthquake-induced damage and the testing of an on-site earthquake early warning system. OSU-CT is mainly based on low-cost instrumentation realized ad hoc by using cutting-edge technologies and digital MEMS (micro-electro-mechanical systems) triaxial accelerometers with excellent resolution and low noise. Twenty of the forty scheduled stations have already been set up on the ground floor of significant historic public buildings. In order to assess the performance of an earthquake early warning (EEW) on-site system, we also installed wide-band velocimeters (ETL3D/5s) in three edifices chosen as test sites, which will be instrumented for a structural health monitoring (SHM). In addition to several laboratory and field validation tests on the developed instruments, an effective operational test of OSU-CT was the M-w 4.3 earthquake occurring on 23 December 2021, 16 km west, south-west of Catania. Peak ground accelerations (4.956 gal to 39.360 gal) recorded by the network allowed obtaining a first urban shakemap and determining a reliable distribution of ground motion in the historical center of the city, useful for the vulnerability studies of the historical edifices.