Scholarlink

<p>Ground Motion Models (GMMs) are empirically-calibrated equations relating ground motion intensity measures to earthquake magnitude, source-to-site distance, geological local site conditions, and possibly other covariates. GMMs are employed for applications such as probabilistic seismic hazard analysis and post-event rapid shaking estimation. Since early 2014, the densely populated Campi Flegrei caldera in Southern Italy has experienced increasing seismicity, concomitant to the volcanic unrest and ground uplift, with over ten thousand recorded events, with duration magnitude larger than − 1.1. In the period between March 2022 and May 2024, seismic activity has intensified, including approximately seventy events with duration magnitudes between 2.5 and 4.4, most of them widely felt, in some cases causing non-negligible seismic structural actions close to the source, and ultimately sparking large public concern. In this study, we calibrated site-specific GMMs for peak ground acceleration, peak ground velocity, and 5% damped spectral pseudo-acceleration for 18 vibration periods <InlineEquation ID="IEq1"> <EquationSource Format="TEX">\(\:T\)</EquationSource> </InlineEquation> ranging from <InlineEquation ID="IEq2"> <EquationSource Format="TEX">\(\:0.02\:s\)</EquationSource> </InlineEquation> to <InlineEquation ID="IEq3"> <EquationSource Format="TEX">\(\:5\:s\)</EquationSource> </InlineEquation>. The dataset includes recordings from the events with duration magnitude greater than or equal to 2.5 over the period 03/22 − 05/24 recorded by more than 50 accelerometric and velocimetric seismic stations at epicentral distances <InlineEquation ID="IEq4"> <EquationSource Format="TEX">\(\:{R}_{epi\:}&lt;40\:km\)</EquationSource> </InlineEquation>. Moment magnitude, which is the scale used in the GMMs, was derived for the events from their displacement Fourier amplitude spectrum. The GMMs show larger spectral amplitudes at short periods(<InlineEquation ID="IEq5"> <EquationSource Format="TEX">\(\:T&lt;0.4\:s\)</EquationSource> </InlineEquation>), and faster attenuation with distance (<InlineEquation ID="IEq6"> <EquationSource Format="TEX">\(\:{R}_{epi}\ge\:5km)\)</EquationSource> </InlineEquation> as compared to some existing ground motion models for Italy.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Ground motion models for Campi Flegrei (Italy)

  • 期刊论文

  • 出版模式：

    开放获取

  • 发表日期：

    2025年11月19日

查看全文
  • Antonio Scala,
  • Claudio Strumia,
  • Pasquale Cito,
  • Francesco Scotto di Uccio,
  • Gaetano Festa,
  • Iunio Iervolino,
  • Aldo Zollo,
  • Antonella Bobbio,
  • Vincenzo Convertito,
  • Luca Elia,
  • Antonio Emolo,
  • Antonio Giovanni Iaccarino

摘要

Ground Motion Models (GMMs) are empirically-calibrated equations relating ground motion intensity measures to earthquake magnitude, source-to-site distance, geological local site conditions, and possibly other covariates. GMMs are employed for applications such as probabilistic seismic hazard analysis and post-event rapid shaking estimation. Since early 2014, the densely populated Campi Flegrei caldera in Southern Italy has experienced increasing seismicity, concomitant to the volcanic unrest and ground uplift, with over ten thousand recorded events, with duration magnitude larger than − 1.1. In the period between March 2022 and May 2024, seismic activity has intensified, including approximately seventy events with duration magnitudes between 2.5 and 4.4, most of them widely felt, in some cases causing non-negligible seismic structural actions close to the source, and ultimately sparking large public concern. In this study, we calibrated site-specific GMMs for peak ground acceleration, peak ground velocity, and 5% damped spectral pseudo-acceleration for 18 vibration periods \(\:T\) ranging from \(\:0.02\:s\) to \(\:5\:s\) . The dataset includes recordings from the events with duration magnitude greater than or equal to 2.5 over the period 03/22 − 05/24 recorded by more than 50 accelerometric and velocimetric seismic stations at epicentral distances \(\:{R}_{epi\:}<40\:km\) . Moment magnitude, which is the scale used in the GMMs, was derived for the events from their displacement Fourier amplitude spectrum. The GMMs show larger spectral amplitudes at short periods( \(\:T<0.4\:s\) ), and faster attenuation with distance ( \(\:{R}_{epi}\ge\:5km)\) as compared to some existing ground motion models for Italy.