...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Natural hazards and earth system sciences >When probabilistic seismic hazard climbs volcanoes: the Mt. Etna case, Italy - Part 2: Computational implementation and first results
【24h】

When probabilistic seismic hazard climbs volcanoes: the Mt. Etna case, Italy - Part 2: Computational implementation and first results

机译：当概率地震危险攀爬火山时：MT.Etna案例，意大利 - 第2部分：计算实施和第一次结果

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

This paper describes the model implementation and presents results of a probabilistic seismic hazard assessment (PSHA) for the Mt. Etna volcanic region in Sicily, Italy, considering local volcano-tectonic earthquakes. Working in a volcanic region presents new challenges not typically faced in standard PSHA, which are broadly due to the nature of the local volcano-tectonic earthquakes, the cone shape of the volcano and the attenuation properties of seismic waves in the volcanic region. These have been accounted for through the development of a seismic source model that integrates data from different disciplines (historical and instrumental earthquake datasets, tectonic data, etc.; presented in Part 1, by Azzaro et al., 2017) and through the development and software implementation of original tools for the computation, such as a new ground-motion prediction equation and magnitude-scaling relationship specifically derived for this volcanic area, and the capability to account for the surficial topography in the hazard calculation, which influences source-to-site distances. Hazard calculations have been carried out after updating the most recent releases of two widely used PSHA software packages (CRISIS, as in Ordaz et al., 2013; the OpenQuake engine, as in Pagani et al., 2014). Results are computed for short-to mid-term exposure times (10% probability of exceedance in 5 and 30 years, Poisson and time dependent) and spectral amplitudes of engineering interest. A preliminary exploration of the impact of sitespecific response is also presented for the densely inhabited Etna's eastern flank, and the change in expected ground motion is finally commented on. These results do not account for M > 6 regional seismogenic sources which control the hazard at long return periods. However, by focusing on the impact of M < 6 local volcano-tectonic earthquakes, which dominate the hazard at the short-to mid-term exposure times considered in this study, we present a different viewpoint t
机译：本文介绍了意大利西西里岛的MT.Etna火山区概率的模型实施和提出了概率地震危害评估（PSHA）的结果，考虑到局部火山构造地震。在火山地区工作呈现出通常面临的标准PSHA的新挑战，这主要是由于局部火山构造地震的性质，火山的锥形和火山地震波的衰减特性。这些已经通过开发地震源模型来占据了不同学科的地震源模型（历史和乐器地震数据集，构造数据等;在第1部分，由Azzaro等，2017年）和通过开发和发展软件实现用于计算的原始工具，例如用于该火山区域的新的地面运动预测等式和专门导出的幅度缩放关系，以及对危险计算中的表格地形进行处理的能力，影响源至 - 网站距离。在更新两种广泛使用的PSHA软件包（危机的最新版本之后，已经进行了危险计算（如Ordaz等，2013; OpenQuake引擎，如Pagani等，2014年）。结果用于短至中期暴露时间（5％和30年，泊松和时间依赖的10％的概率）以及工程兴趣的光谱幅度。初步探索临床响应的影响，也为密集居住的埃特纳的东部侧翼介绍，最终评论了预期地面运动的变化。这些结果不考虑M> 6区域发生源，以控制长期返回期的危害。然而，通过专注于M <6局部火山构造地震的影响，这在本研究中考虑的短期暴露时间占据了危险，我们呈现了不同的观点

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号