A saga of the 1896 South Iceland earthquake sequence: magnitudes, macroseismic effects and damage
A saga of the 1896 South Iceland earthquake sequence: magnitudes, macroseismic effects and damage
复制标题
1896 年冰岛南部地震序列的传奇：震级、宏观地震影响和损害
DOI：
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发表时间：
2014
影响因子：
4.6
通讯作者：
R. Rupakhety
中科院分区：
文献类型：
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作者：
R. Sigbjörnsson;R. Rupakhety
本文介绍了 Ambraseys 教授利用位于俄罗斯和意大利的原始地震仪器记录的原始远震数据对 1896 年冰岛南部地震序列中主要事件震级进行量化的工作。这包括他的原始工作表示例，显示表面波震级重新评估以及冰岛参数地震目录的初始部分。简要描述了地震序列的宏观地震效应。地震对受影响最严重地区的建筑物造成的损害被量化为倒塌农舍的比例。量化损害的空间分布与该序列地震的估计震中具有良好的对应性。描述了地震序列的宏观地震影响，并与 2000 年 6 月和 2008 年 5 月冰岛南部地震的宏观地震影响进行了比较。有人认为，Ambraseys 教授完全基于远震测量获得的序列最大事件的震级估计可能比其他基于受损区域范围的估计更准确。这一论点得到了基于 2000 年 6 月地震的有感面积、受损面积和震矩估计与 1896 年主震记录影响之间比较的讨论的支持。这里提出的观察和讨论强调了安布拉西斯教授在历史地震研究中的重要性。
This paper describes Professor Ambraseys’s work on the quantification of magnitudes of the main events in the 1896 South Iceland earthquake sequence, using original teleseismic data recorded by primitive seismological instruments located in Russia and Italy. This includes an example of his original worksheets showing surface-wave magnitude re-appraisal along with the initial part of the parametric earthquake catalogue of Iceland. A brief description of the macroseismic effects of the earthquake sequence is presented. Earthquake damage to buildings in the most affected area is quantified as fractions of collapsed farmhouses. Spatial distribution of the quantified damage shows good correspondence to the estimated epicentres of the earthquakes of the sequence. The macroseismic effects of the earthquake sequence are described and compared to those of the South Iceland earthquakes in June 2000 and May 2008. It is argued that the magnitude estimate of the largest event of the sequence as obtained by Professor Ambraseys, based entirely on teleseismic measurements, is likely to be more accurate than other estimates based on the extent of the damaged area. This argument is supported by a discussion based on a comparison between the felt area, damaged area, and seismic moment estimates of the June 2000 earthquakes with the documented effects of the 1896 main shock. The observations and discussions presented here highlight the importance of Professor Ambraseys in the study of historic earthquakes.