Re-Evaluation of the Earthquake Catalog for Spain Using the EMS-98 Scale for the Period 1900–1962

IF 1.9 4区 地球科学 Q2 GEOCHEMISTRY & GEOPHYSICS pure and applied geophysics Pub Date : 2024-05-27 DOI:10.1007/s00024-024-03461-9
J. Fernández-Fraile, Maurizio Mattesini, E. Buforn
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Abstract

This study uses a systematic methodology for the re-evaluation and analysis of earthquakes in the first half of the 20th century in Spain, a period with very inhomogeneous information sources. To the best of our knowledge, these earthquakes have never been previously re-evaluated using as many information sources as the collected in this paper. The methodology used in this paper has been tested in SE Spain for further application in the rest of the Iberian Peninsula. We have collected and thoroughly revised all the seismic information and data sources available, ranging from specific reports, macroseismic questionnaires, and seismograms to newspapers and pictures. In addition, for a set of 16 earthquakes between 1900 and 1962 in the selected area, we provide EMS-98 intensities and macroseismic epicenters, except for one that is instrumental. Among the 16 earthquakes, it has only been possible to provide a depth value for eight of them. The seismic intensities have been evaluated using the intensity scale EMS-98, and the epicenters have been located with both instrumental methods (Hypocenter location) and macroseismic methods (such as Bakun, Boxer 4.0 and MEEP 2.0). Our results show that, Imax (maximum seismic intensity) values from the IGN catalogue are larger in more than the half of the revised earthquakes by between a half degree to two-and-a-half degrees, and only for Lorquí earthquake on April 25th, 1912, the Imax was smaller by half a degree. Most of the epicenters were also updated with changes between 1 and 41 km. Focal depths are less than 10 km, but this parameter has large uncertainties. The result of this study is a homogeneous seismic catalog (re-evaluated epicenters and Imax) for the period 1900–1962 that can be compared with periods prior to the 20th century.

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使用 EMS-98 等级重新评估 1900-1962 年西班牙地震目录
本研究采用系统的方法对 20 世纪上半叶西班牙的地震进行重新评估和分析,这一时期的信息来源非常不均匀。据我们所知,以前从未使用像本文收集的这么多信息源对这些地震进行过重新评估。本文中使用的方法已在西班牙东南部进行了测试,以便进一步应用于伊比利亚半岛的其他地区。我们收集并彻底修订了所有可用的地震信息和数据源,从具体报告、宏观地震问卷、地震图到报纸和图片。此外,对于 1900 年至 1962 年在选定地区发生的 16 次地震,我们提供了 EMS-98 地震烈度和宏观地震震中,只有一次地震除外。在这 16 次地震中,我们只能提供其中 8 次地震的深度值。地震烈度采用 EMS-98 烈度表进行评估,震中定位采用仪器法(下心定位)和宏观地震法(如 Bakun、Boxer 4.0 和 MEEP 2.0)。我们的结果表明,IGN 目录中的 Imax(最大地震烈度)值在半数以上的修订地震中都要大半度到两度半,只有 1912 年 4 月 25 日的 Lorquí 地震的 Imax 值要小半度。大多数震中也得到了更新,变化幅度在 1 至 41 千米之间。震源深度小于 10 千米,但这一参数具有很大的不确定性。这项研究的成果是 1900-1962 年期间的同质地震目录(重新评估的震中和 Imax),可与 20 世纪之前的地震目录进行比较。
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来源期刊
pure and applied geophysics
pure and applied geophysics 地学-地球化学与地球物理
CiteScore
4.20
自引率
5.00%
发文量
240
审稿时长
9.8 months
期刊介绍: pure and applied geophysics (pageoph), a continuation of the journal "Geofisica pura e applicata", publishes original scientific contributions in the fields of solid Earth, atmospheric and oceanic sciences. Regular and special issues feature thought-provoking reports on active areas of current research and state-of-the-art surveys. Long running journal, founded in 1939 as Geofisica pura e applicata Publishes peer-reviewed original scientific contributions and state-of-the-art surveys in solid earth and atmospheric sciences Features thought-provoking reports on active areas of current research and is a major source for publications on tsunami research Coverage extends to research topics in oceanic sciences See Instructions for Authors on the right hand side.
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