基于印度尼西亚区域网络的苏拉威西岛帕卢-科罗和马塔诺断层轻中度地震的新力矩张量目录:断层分析与洞察

IF 2.4 3区 地球科学 Q2 GEOCHEMISTRY & GEOPHYSICS
Dian Kusumawati , David P. Sahara , Nanang T. Puspito , Mudrik R. Daryono , Andri D. Nugraha , Muhamad Sadly , Bambang S. Prayitno , Daryono Daryono , Nova Heryandoko , Supriyanto Rohadi
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引用次数: 0

摘要

从 2009 年开始,作为气象、气候和地球物理局(BMKG)台站部署的一部分,苏拉威西地区的区域地震网络得到了实质性的改善,这使得我们能够通过力矩张量反演,确定 2009 年至 2018 年期间帕卢-科罗(Palu-Koro)和马塔诺(Matano)断层沿线发生的 140 次浅层(5-60 千米)轻度至中度地震(3.8 ≤ Mw ≤ 6.1)的地震机制。在本研究获得的 140 个解决方案中,有十(10)个在国际地震中心公报中找到,并被用作验证。最佳解的双偶机制(方差缩小≥0.4,条件数≤7.5)被进一步用于分析帕卢-科罗和马塔诺地段。我们观察到,帕卢-科罗断层的东加拉(Donggala)段显示出不同的地震机制类型。而其后的两个地段,即帕卢和萨鲁基地段,则以斜向走向滑动为主,并伴有正向和逆向机制。马塔诺断层的特点是走向滑动机制,也有正向机制。正向机制描述了马塔诺地段的拉分系统,表现为马塔诺湖。这项工作的成果增进了我们对区域构造的了解。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

A new moment tensor catalogue of light to moderate earthquakes in Palu-Koro and Matano faults, Sulawesi, based on the regional network in Indonesia: Fault analysis and insight

A new moment tensor catalogue of light to moderate earthquakes in Palu-Koro and Matano faults, Sulawesi, based on the regional network in Indonesia: Fault analysis and insight

Starting from 2009, substantial improvements in the regional seismic network operating in Sulawesi, as part of the Meteorological, Climatological, and Geophysical Agency (BMKG) station deployment, allowed us to determine earthquake mechanism for 140 shallow (5–60 km) light to moderate size (3.8 ≤ Mw ≤ 6.1) earthquakes between 2009 and 2018 along the Palu-Koro and Matano faults, through moment tensor inversion. Ten (10) out of the 140 solutions obtained in this study were found in the International Seismological Centre Bulletin and used as validation. The double-couple mechanism of the best solutions (variance reduction ≥0.4 and condition number ≤ 7.5) is further used to analyze the Palu-Koro and Matano segments. We observed that the Donggala segment of the Palu-Koro fault shows variable earthquake mechanism types. Whereas the two subsequent segments, the Palu and Saluki segments, show predominate oblique strike-slip with normal and reverse mechanisms. The Matano fault is characterized by strike-slip mechanisms, with normal mechanisms also observed. The normal mechanisms depict the pull-apart system in the Matano segment, manifested as Matano Lake. The results of this work improve our understanding of regional tectonics.

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来源期刊
Physics of the Earth and Planetary Interiors
Physics of the Earth and Planetary Interiors 地学天文-地球化学与地球物理
CiteScore
5.00
自引率
4.30%
发文量
78
审稿时长
18.5 weeks
期刊介绍: Launched in 1968 to fill the need for an international journal in the field of planetary physics, geodesy and geophysics, Physics of the Earth and Planetary Interiors has now grown to become important reading matter for all geophysicists. It is the only journal to be entirely devoted to the physical and chemical processes of planetary interiors. Original research papers, review articles, short communications and book reviews are all published on a regular basis; and from time to time special issues of the journal are devoted to the publication of the proceedings of symposia and congresses which the editors feel will be of particular interest to the reader.
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