Southeast and Central Sulawesi are the areas characterized by high tectonic activity due to the presence of the active Matano fault. The seismicity along this fault is high. However, the initial hypocenter often deviates from the fault’s trend line, thus causing the need for earthquake relocation with an improved local structure description. The double difference method stands out as a precise technique for hypocenter relocation, utilizing the data on relative travel time between hypocenter pairs. After relocation, the selected hypocenter facilitates the derivation of a focal mechanism, crucial in determining fault types. In this research, we relocated the hypocenters of 485 events of January 2009 to December 2016, ranging in magnitude from M2 to M6.1, 427 of which showed a pattern close to the general trend of major and minor faults. Seismic offsets along the Matano fault are predominantly oriented in the southeast or northwest direction. Moreover, most of the earthquake activity recorded at a depth of 10 km before relocation is no longer visible. Based on the statistics, the time residuals from –2.5 to +2.5 ms resulting from the relocation procedure are better close to 0 than those of –4.5 to +4.5 ms for the events before relocation. The focal mechanism solutions of 16 events of final relocation are dominated by strike-slip faulting. The Matano fault is predominantly sinistral-type. The seismicity along this fault zone results from an activity of this fault, which is the main source of earthquakes, and from its interaction with the neighboring Palu-Koro and Sorong faults.

M. F. I. Massinai

O. S. Bamba

A. Ical

S. Aswad

M. A. Massinai

. Sulastri

Geodynamics & Tectonophysics

The purpose of the journal is facilitating awareness of the international scientific community of new data on geodynamics of continental lithosphere in a wide range of geolchronological data, as well as tectonophysics as an integral part of geodynamics, in which physico-mathematical and structural-geological concepts are applied to deal with topical problems of the evolution of structures and processes taking place simultaneously in the lithosphere.    Complex geological and geophysical studies of the Earth tectonosphere have been significantly enhanced in the current decade across the world. As a result, a large number of publications are developed based on thorough analyses of paleo- and modern geodynamic processes with reference to results of properly substantiated physical experiments, field data and tectonophysical calculations. Comprehensive research of that type, followed by consolidation and generalization of research results and conclusions, conforms to the start-of-the-art of the Earth’s sciences.

The journal "Geodynamics and Tectonophysics" aims to enhance the awareness of the international scientific community regarding new data on the geodynamics of the continental lithosphere across a wide range of geological chronological data, as well as tectonophysics as an integral part of geodynamics. In this field, physico-mathematical and structural-geological concepts are applied to address the evolving structures and processes occurring simultaneously within the lithosphere. In recent years, complex geological and geophysical studies of the Earth's tectonosphere have significantly increased worldwide, resulting in a substantial number of publications based on thorough analyses of paleo- and modern geodynamic processes, referencing well-substantiated physical experiments, field data, and tectonophysical calculations. Such comprehensive research, followed by the consolidation and generalization of research results and conclusions, aligns with the cutting-edge of Earth sciences.

《Geodynamics and Tectonophysics》期刊旨在提高国际科学界对大陆岩石圈地球动力学新数据的认识，涵盖广泛的地质年代数据，以及作为地球动力学重要组成部分的构造物理学。在这一领域中，应用物理数学和结构地质学概念来解决岩石圈内同时发生的结构和过程演变的相关问题。近年来，全球范围内对地球构造圈的复杂地质和地球物理研究显著增强，导致大量基于对古今地球动力学过程的深入分析的出版物相继问世，这些分析参考了经过充分论证的物理实验、现场数据和构造物理计算。此类综合研究，随后对研究结果和结论进行整合和概括，符合现代地球科学的前沿。

INTERPRETING FAULT DYNAMICS IN TERMS OF HYPOCENTER RELOCATION AND FAULT CHARACTERIZATION

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Journal Info

Category	Quartile
GEOCHEMISTRY & GEOPHYSICS	4