基于InSAR的指数和对数函数地震后阶段垂直变形模型

IF 2.8 4区地球科学 Q2 GEOCHEMISTRY & GEOPHYSICS

Geodesy and Geodynamics Pub Date : 2023-07-01 DOI:10.1016/j.geog.2023.01.003

Irma Yusiyanti , Tattyana Wening Kalbuadi Prajardi , Yofita Indah Saputri , Cecep Pratama

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引用次数: 0

摘要

2018年9月28日，帕卢发生MW7.4级地震，震中为119.86°，0.72°。强烈的震动给苏拉威西中部造成了严重的破坏，特别是在帕卢。我们进行了震后变形研究，以确定变形模式并减少未来地震的影响。利用LiCSBAS对干涉合成孔径雷达(InSAR)数据进行处理，得到时间序列。将时间序列数据拟合成指数函数和对数函数，以确定地震后变形的机理。指数模型识别粘弹性机制的影响，对数模型识别后滑机制。帕卢地震拟合对数函数和指数函数，但对数函数比指数函数更重要。震后变形以后滑机制为主，粘弹性机制作用较小。

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Vertical deformation model on postseismic phase using exponential and logarithmic function based on InSAR

The Palu M_W7.4 earthquake occurred on September 28, 2018, with the epicenter at 119.86°, 0.72°. The severe shaking caused severe damage in Central Sulawesi, especially in Palu. We conducted a postseismic deformation study to determine the deformation pattern and reduce future earthquakes' impact. Interferometric Synthetic Aperture Radar (InSAR) data were processed using LiCSBAS to get the time series. The time series data were fitted to exponential and logarithmic functions to determine the mechanism of postseismic deformation. The exponential model identified the influence of the viscoelastic mechanism, and the logarithm identified the afterslip mechanism. The Palu earthquake was fitted to logarithmic and exponential, but the logarithmic was more significant than an exponential function. Afterslip mechanism predominates, and viscoelastic mechanisms play a minor role in this postseismic deformation.

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来源期刊

Geodesy and Geodynamics GEOCHEMISTRY & GEOPHYSICS-

CiteScore

4.40

自引率

4.20%

发文量

566

审稿时长

69 days

期刊介绍： Geodesy and Geodynamics launched in October, 2010, and is a bimonthly publication. It is sponsored jointly by Institute of Seismology, China Earthquake Administration, Science Press, and another six agencies. It is an international journal with a Chinese heart. Geodesy and Geodynamics is committed to the publication of quality scientific papers in English in the fields of geodesy and geodynamics from authors around the world. Its aim is to promote a combination between Geodesy and Geodynamics, deepen the application of Geodesy in the field of Geoscience and quicken worldwide fellows'' understanding on scientific research activity in China. It mainly publishes newest research achievements in the field of Geodesy, Geodynamics, Science of Disaster and so on. Aims and Scope: new theories and methods of geodesy; new results of monitoring and studying crustal movement and deformation by using geodetic theories and methods; new ways and achievements in earthquake-prediction investigation by using geodetic theories and methods; new results of crustal movement and deformation studies by using other geologic, hydrological, and geophysical theories and methods; new results of satellite gravity measurements; new development and results of space-to-ground observation technology.