• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Pure and Applied Geophysics >Updating the probabilistic seismic hazard values of northern Algeria with the 21 May 2003 M 6.8 Algiers earthquake included
【24h】

Updating the probabilistic seismic hazard values of northern Algeria with the 21 May 2003 M 6.8 Algiers earthquake included

机译：用2003年5月21日的阿尔及尔6.8级地震更新了阿尔及利亚北部的概率地震危险性值

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

The occurrence of the Algiers earthquake (M 6.8) of May 21, 2003, has motivated the necessity to reassess the probabilistic seismic hazard of northern Algeria. The fact that this destructive earthquake took place in an area where there was no evidence of previous significant earthquakes, neither instrumental nor historical, strongly encourages us to review the seismic hazard map of this region. Recently, the probabilistic seismic hazard of northern Algeria was computed using the spatially smoothed seismicity methodology. The catalog used in the previous computation was updated for this review, and not only includes information until June 2003, but also considers a recent re-evaluation of several historical earthquakes. In this paper, the same methodology and seismicity models are utilized in an effort to compare this methodology against an improved and updated seismic catalog. The largest mean peak ground acceleration (PGA) values are obtained in northernmost Algeria, specifically in the central area of the Tell Atlas. These values are of the order of 0.48 g for a return period of 475 years. In the City of Algiers, the capital of Algeria, and approximately 50 km from the reported epicenter of this latest destructive earthquake, a new mean PGA value of 0.23 g is obtained for the same return period. This value is 0.07 g greater than that obtained in the previous computation. In general, we receive greater seismic hazard results in the surrounding area of Algiers, especially to the southwest. The main reason is not this recent earthquake by itself, but the significant increase in the m(max) magnitude in the seismic source where the city and the epicenter are included.
机译：2003年5月21日发生的阿尔及尔地震（M 6.8）促使重新评估北部阿尔及利亚的概率地震危险的必要性。这次破坏性地震发生在没有证据表明以前发生过重大地震的地区，无论是仪器地震还是历史地震，这一事实强烈鼓励我们回顾该地区的地震灾害图。最近，使用空间平滑地震学方法计算了阿尔及利亚北部的概率地震灾害。之前的计算中使用的目录已为此审核更新，不仅包括直到2003年6月的信息，而且还考虑了最近对几场历史地震的重新评估。在本文中，使用了相同的方法学和地震活动性模型，试图将这种方法学与经过改进和更新的地震目录进行比较。最大的平均地面加速度（PGA）值是在阿尔及利亚最北端，特别是在Tell Atlas的中部地区获得的。这些值在475年的回收期内约为0.48 g。在阿尔及利亚首都阿尔及尔市，距据报道的这次最新破坏性地震震中约50公里，在相同的返回期内，新的平均PGA值为0.23 g。该值比先前计算中获得的值大0.07 g。一般而言，我们在阿尔及尔周边地区，尤其是西南部，收到的地震危险性结果更大。主要原因不是这次地震本身，而是包括城市和震中在内的地震震源的m（max）值显着增加。

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