希腊俯冲带的强震和海啸潜力

IF 2.1 3区 地球科学 Q2 GEOCHEMISTRY & GEOPHYSICS
Ioanna Triantafyllou , Apostolos Agalos , Achilleas G. Samaras , Theophanis V. Karambas , Gerassimos A. Papadopoulos
{"title":"希腊俯冲带的强震和海啸潜力","authors":"Ioanna Triantafyllou ,&nbsp;Apostolos Agalos ,&nbsp;Achilleas G. Samaras ,&nbsp;Theophanis V. Karambas ,&nbsp;Gerassimos A. Papadopoulos","doi":"10.1016/j.jog.2024.102021","DOIUrl":null,"url":null,"abstract":"<div><p>The tsunamigenic potential of an earthquake depends on its size, source depth and focal mechanism. The Hellenic Subduction Zone (HSZ) has been selected in the paper to study this important issue. The HSZ was ruptured by 11 strong (M<sub>w</sub>6.0) earthquakes in the time period 2009–2023. One earthquake ruptured onshore but only three out of ten offshore earthquakes produced tsunamis: 1 July 2009 (M<sub>w</sub>6.4), 25 October 2018 (M<sub>w</sub>6.8), 5 May 2020 (M<sub>w</sub>6.6). For each one of the two more recent earthquakes of 5 May 2020 (tsunamigenic, thrust faulting) and 12 October 2021 (non-tsunamigenic, strike-slip faulting) we developed heterogeneous fault models from the inversion of teleseismic P-waveforms, and homogeneous fault models from published moment-tensor solutions. For each fault model tsunami generation and propagation was numerically simulated based on an advanced phase-resolving wave model with the use of higher-order Boussinesq-type equations. The modelled tsunami mareograms are consistent with tide records of the small tsunami (height ∼30 cm) produced by the 2020 earthquake. For the 2021 earthquake the modelled mareograms showed tsunami-like disturbance with amplitude not exceeding the noise level. The tsunamigenic earthquakes of 2009, 2018 and 2020 shared magnitude M<sub>w</sub>≥ 6.4, shallow depth (h&lt;20 km), moderate-to-high dip-angle and thrust faulting or oblique slip with significant thrust component. In the remaining seven non-tsunamigenic earthquakes, including the 2021 one, at least one of these features is missing. The results obtained help to better understand the seismic mechanisms of tsunami generation in the HSZ. Further investigation is needed for the central HSZ segment to the south of Crete Island, which historically has not been ruptured by large (M<sub>w</sub>&gt;7.0) tsunamigenic earthquakes. In contrast, the western and eastern HSZ segments ruptured by the large 365 AD and 1303 AD tsunamigenic earthquakes.</p></div>","PeriodicalId":54823,"journal":{"name":"Journal of Geodynamics","volume":null,"pages":null},"PeriodicalIF":2.1000,"publicationDate":"2024-02-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Strong earthquakes and tsunami potential in the Hellenic Subduction Zone\",\"authors\":\"Ioanna Triantafyllou ,&nbsp;Apostolos Agalos ,&nbsp;Achilleas G. Samaras ,&nbsp;Theophanis V. Karambas ,&nbsp;Gerassimos A. Papadopoulos\",\"doi\":\"10.1016/j.jog.2024.102021\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><p>The tsunamigenic potential of an earthquake depends on its size, source depth and focal mechanism. The Hellenic Subduction Zone (HSZ) has been selected in the paper to study this important issue. The HSZ was ruptured by 11 strong (M<sub>w</sub>6.0) earthquakes in the time period 2009–2023. One earthquake ruptured onshore but only three out of ten offshore earthquakes produced tsunamis: 1 July 2009 (M<sub>w</sub>6.4), 25 October 2018 (M<sub>w</sub>6.8), 5 May 2020 (M<sub>w</sub>6.6). For each one of the two more recent earthquakes of 5 May 2020 (tsunamigenic, thrust faulting) and 12 October 2021 (non-tsunamigenic, strike-slip faulting) we developed heterogeneous fault models from the inversion of teleseismic P-waveforms, and homogeneous fault models from published moment-tensor solutions. For each fault model tsunami generation and propagation was numerically simulated based on an advanced phase-resolving wave model with the use of higher-order Boussinesq-type equations. The modelled tsunami mareograms are consistent with tide records of the small tsunami (height ∼30 cm) produced by the 2020 earthquake. For the 2021 earthquake the modelled mareograms showed tsunami-like disturbance with amplitude not exceeding the noise level. The tsunamigenic earthquakes of 2009, 2018 and 2020 shared magnitude M<sub>w</sub>≥ 6.4, shallow depth (h&lt;20 km), moderate-to-high dip-angle and thrust faulting or oblique slip with significant thrust component. In the remaining seven non-tsunamigenic earthquakes, including the 2021 one, at least one of these features is missing. The results obtained help to better understand the seismic mechanisms of tsunami generation in the HSZ. Further investigation is needed for the central HSZ segment to the south of Crete Island, which historically has not been ruptured by large (M<sub>w</sub>&gt;7.0) tsunamigenic earthquakes. In contrast, the western and eastern HSZ segments ruptured by the large 365 AD and 1303 AD tsunamigenic earthquakes.</p></div>\",\"PeriodicalId\":54823,\"journal\":{\"name\":\"Journal of Geodynamics\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":2.1000,\"publicationDate\":\"2024-02-20\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Journal of Geodynamics\",\"FirstCategoryId\":\"89\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S0264370724000048\",\"RegionNum\":3,\"RegionCategory\":\"地球科学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q2\",\"JCRName\":\"GEOCHEMISTRY & GEOPHYSICS\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Geodynamics","FirstCategoryId":"89","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0264370724000048","RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"GEOCHEMISTRY & GEOPHYSICS","Score":null,"Total":0}
引用次数: 0

摘要

地震引发海啸的可能性取决于其规模、震源深度和聚焦机制。本文选择希腊俯冲带(HSZ)来研究这一重要问题。在 2009-2023 年期间,希腊潜没带发生了 11 次强震(Mw6.0)。一次地震发生在陆上,但十次离岸地震中只有三次产生了海啸:2009 年 7 月 1 日(Mw6.4)、2018 年 10 月 25 日(Mw6.8)和 2020 年 5 月 5 日(Mw6.6)。对于 2020 年 5 月 5 日(海啸成因、推力断层)和 2021 年 10 月 12 日(非海啸成因、走向滑动断层)这两次较近期的地震,我们分别根据远震 P 波反演建立了异质断层模型,并根据已公布的力矩张量解建立了同质断层模型。对于每种断层模型,海啸的产生和传播都是根据先进的相位解析波模型进行数值模拟的,并使用了高阶布森斯克方程。模拟的海啸马雷图与 2020 年地震产生的小海啸(高度∼30 厘米)的潮汐记录一致。2021 年地震的海啸模拟图显示了类似海啸的扰动,振幅不超过噪声水平。2009 年、2018 年和 2020 年的海啸源地震都具有震级 Mw≥ 6.4、震源深度较浅(20 千米)、倾角中等至偏大、推力断层或具有明显推力成分的斜滑等特征。包括 2021 年地震在内的其余 7 个非日震源地震至少缺少上述特征之一。所获得的结果有助于更好地理解 HSZ 海啸产生的地震机制。克里特岛以南的 HSZ 中部地段还需要进一步研究,因为该地段在历史上没有发生过大型(Mw>7.0)海啸源地震。相比之下,公元 365 年和公元 1303 年的海啸大地震造成 HSZ 西部和东部断裂。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Strong earthquakes and tsunami potential in the Hellenic Subduction Zone

The tsunamigenic potential of an earthquake depends on its size, source depth and focal mechanism. The Hellenic Subduction Zone (HSZ) has been selected in the paper to study this important issue. The HSZ was ruptured by 11 strong (Mw6.0) earthquakes in the time period 2009–2023. One earthquake ruptured onshore but only three out of ten offshore earthquakes produced tsunamis: 1 July 2009 (Mw6.4), 25 October 2018 (Mw6.8), 5 May 2020 (Mw6.6). For each one of the two more recent earthquakes of 5 May 2020 (tsunamigenic, thrust faulting) and 12 October 2021 (non-tsunamigenic, strike-slip faulting) we developed heterogeneous fault models from the inversion of teleseismic P-waveforms, and homogeneous fault models from published moment-tensor solutions. For each fault model tsunami generation and propagation was numerically simulated based on an advanced phase-resolving wave model with the use of higher-order Boussinesq-type equations. The modelled tsunami mareograms are consistent with tide records of the small tsunami (height ∼30 cm) produced by the 2020 earthquake. For the 2021 earthquake the modelled mareograms showed tsunami-like disturbance with amplitude not exceeding the noise level. The tsunamigenic earthquakes of 2009, 2018 and 2020 shared magnitude Mw≥ 6.4, shallow depth (h<20 km), moderate-to-high dip-angle and thrust faulting or oblique slip with significant thrust component. In the remaining seven non-tsunamigenic earthquakes, including the 2021 one, at least one of these features is missing. The results obtained help to better understand the seismic mechanisms of tsunami generation in the HSZ. Further investigation is needed for the central HSZ segment to the south of Crete Island, which historically has not been ruptured by large (Mw>7.0) tsunamigenic earthquakes. In contrast, the western and eastern HSZ segments ruptured by the large 365 AD and 1303 AD tsunamigenic earthquakes.

求助全文
通过发布文献求助,成功后即可免费获取论文全文。 去求助
来源期刊
Journal of Geodynamics
Journal of Geodynamics 地学-地球化学与地球物理
CiteScore
4.60
自引率
0.00%
发文量
21
审稿时长
6-12 weeks
期刊介绍: The Journal of Geodynamics is an international and interdisciplinary forum for the publication of results and discussions of solid earth research in geodetic, geophysical, geological and geochemical geodynamics, with special emphasis on the large scale processes involved.
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
提示
您的信息不完整,为了账户安全,请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
确定
请完成安全验证×
copy
已复制链接
快去分享给好友吧!
我知道了
右上角分享
点击右上角分享
0
联系我们:info@booksci.cn Book学术提供免费学术资源搜索服务,方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。 Copyright © 2023 布克学术 All rights reserved.
京ICP备2023020795号-1
ghs 京公网安备 11010802042870号
Book学术文献互助
Book学术文献互助群
群 号:481959085
Book学术官方微信