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首页> 外文期刊>Bollettino di Geofisica Teorica ed Applicata >The Pollino 2011-2012 seismic swarm (southern Italy): first results of the M-L=3.6 aftershock recorded by co-located electromagnetic and seismic stations
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The Pollino 2011-2012 seismic swarm (southern Italy): first results of the M-L=3.6 aftershock recorded by co-located electromagnetic and seismic stations

机译：Pollino 2011-2012年地震群（意大利南部）：位于同一地点的电磁和地震台站记录的M-L = 3.6余震的初步结果

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摘要

In the framework of S3 project "Short term earthquake forecasting" supported by Department of Civil Protection (DPC) and National Institute of Geophysics and Volcanology (INGV), a magnetotelluric (MT) station was installed in the Pollino area (southern Italy) during September 2012 by the Institute of Methodologies for Environmental Analysis (IMAA-CNR, Italy) in order to investigate possible correlation between electromagnetic signals and seismicity. For the last two years Pollino area has been characterized by swarm-type seismicity, culminating with the earthquake occurred on October 25, 2012 of magnitude M-W=5.0. After the mainshock, the INGV installed a seismic station close to the MT station. In this paper, we focus the analysis on the largest event (M-L=3.6) recorded during the co-located electromagnetic and seismic experiment. We applied time-frequency misfit criteria based on the continuous Morlet wavelet transform to compare the electric and seismic homologous components: this analysis confirms an overall good waveform similarity between the signals, but also some interesting differences in amplitude for frequencies above 1 Hz in correspondence of the arrival of particular seismic phases that need further investigations.
机译：在由民防部（DPC）和国家地球物理与火山学研究所（INGV）支持的S3项目“短期地震预报”的框架内，9月期间在意大利南部的波利诺地区安装了一个大地电磁（MT）站环境研究方法研究所（IMAA-CNR，意大利）于2012年进行了研究，目的是研究电磁信号与地震活动性之间的可能关系。在最近两年中，波利诺地区一直以群体型地震活动为特征，并以2012年10月25日发生的M-W = 5.0级地震为高潮。地震发生后，INGV在MT站附近安装了一个地震台。在本文中，我们将分析重点放在在同一地点进行的电磁和地震实验中记录的最大事件（M-L = 3.6）。我们应用基于连续Morlet小波变换的时频失配准则来比较电分量和地震同源分量：此分析确认了信号之间总体上的波形相似性，但是对于高于1 Hz的频率，振幅的一些有趣差异也与之相对应。特定地震阶段的到来需要进一步调查。

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