Evaluation of recent tectonic movement in northeast Japan by using long-term GNSS and tide gauge measurements

IF 2.6 2区地球科学 Q2 GEOSCIENCES, MULTIDISCIPLINARY

Journal of Structural Geology Pub Date : 2024-09-10 DOI:10.1016/j.jsg.2024.105258

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Abstract

The study investigates tectonic movements in northeast Japan by using long-term (2000–2022) global navigation satellite system (GNSS) and tide gauge measurements. The effect of the 2011 Tohoku-Oki earthquake including the other eight seismic events that occurred within this period is also discussed using GNSS time-series. The result showed the break in GNSS-time series because of occurred earthquakes and pointed out tectonic movements significantly. The GNSS sites located in the central and southern parts of northeast Japan showed that the velocity vectors have strong internal variation and suggest the existence source of alternative deformation because of geological terranes within the region. A least square approach was used, and the trend of sea-level measurements was fitted with the straight line. The obtained results from tide gauge measurements showed a rising trend at almost every site and indicated lithospheric uprising movement because of tectonic activities. This is possible because of the ongoing subduction of the Pacific and Philippine Sea plates beneath the Eurasian and North American plates.

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利用全球导航卫星系统和验潮仪的长期测量评估日本东北部近期的构造运动

该研究利用全球导航卫星系统（GNSS）和验潮仪的长期（2000-2022 年）测量数据，对日本东北部的构造运动进行了研究。研究还利用全球导航卫星系统时间序列讨论了 2011 年东北-冲地震（包括在此期间发生的其他八次地震事件）的影响。结果表明，由于地震的发生，GNSS 时间序列出现了断裂，并指出了明显的构造运动。位于日本东北部中部和南部的全球导航卫星系统站点显示，速度矢量具有很强的内部变化，表明由于该区域内的地质地形而存在替代变形源。采用最小二乘法，用直线拟合了海平面测量的趋势。验潮仪测量的结果显示，几乎每个地点的海平面都呈上升趋势，这表明岩石圈因构造活动而发生了上升运动。这可能是由于太平洋板块和菲律宾海板块正在欧亚板块和北美板块之下俯冲。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Journal of Structural Geology 地学-地球科学综合

CiteScore

6.00

自引率

19.40%

发文量

192

审稿时长

15.7 weeks

期刊介绍： The Journal of Structural Geology publishes process-oriented investigations about structural geology using appropriate combinations of analog and digital field data, seismic reflection data, satellite-derived data, geometric analysis, kinematic analysis, laboratory experiments, computer visualizations, and analogue or numerical modelling on all scales. Contributions are encouraged to draw perspectives from rheology, rock mechanics, geophysics,metamorphism, sedimentology, petroleum geology, economic geology, geodynamics, planetary geology, tectonics and neotectonics to provide a more powerful understanding of deformation processes and systems. Given the visual nature of the discipline, supplementary materials that portray the data and analysis in 3-D or quasi 3-D manners, including the use of videos, and/or graphical abstracts can significantly strengthen the impact of contributions.

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