Migration of Earth Surface Deformation as a Large Earthquake Trigger

Кафтан, В. И.; Melnikov, Andrey

doi:10.1007/978-3-030-31970-0_8

Cited by 6 publications

(8 citation statements)

References 11 publications

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“…A review and analysis of the state of geodetic coordinate systems of different levels, from global to regional and local, is given in [Pobedinsky, Kaftan, 2020].…”

Section: Section Of Geodesy Of the National Geophysical Committeementioning

confidence: 99%

“…In regions with a predominance of the shear mechanism of movement along active faults, slow deformation shear waves are found [Kaftan, Melnikov, 2019;. A heuristic analysis of geosynoptic animation of full shear deformation in the Eastern Anatolia region shows that a year before the M6.1 (2010) earthquake, a significant deformation extremum formed in the region of the future epicenter, which allows us to conclude that a strong seismic event is caused by the accumulation of shear deformations that contribute to the release of stresses within the mature seismic source.…”

Section: Crustal Weather Studyingmentioning

confidence: 99%

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National Report for the IAG of the IUGG 2019–2022

2023

Geoinformatics Research Papers

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Major results of researches conducted by Russian geodesists in 2019-2022 on the topics of the International Association of Geodesy (IAG) of the International Union of Geodesy and Geophysics (IUGG) are presented in this issue. This report is prepared by the Section of Geodesy of the National Geophysical Committee of Russia. In the report prepared for the XXVII General Assembly of IUGG (Germany, Berlin, 11-20 July 2023), the results of principal researches in geodesy, geodynamics, gravimetry, in the studies of geodetic reference frame creation and development, Earth's shape and gravity field, Earth's rotation, geodetic theory, its application and some other directions are briefly described. For some objective reasons not all results obtained by Russian scientists on the field of geodesy are included in the report.

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“…A review and analysis of the state of geodetic coordinate systems of different levels, from global to regional and local, is given in [Pobedinsky, Kaftan, 2020].…”

Section: Section Of Geodesy Of the National Geophysical Committeementioning

confidence: 99%

Section: Crustal Weather Studyingmentioning

confidence: 99%

National Report for the IAG of the IUGG 2019–2022

2023

Geoinformatics Research Papers

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“…Опыт анализа движений и деформаций земной поверхности в районах возникновения крупных и сильных землетрясений, а также в зонах активного вулканизма [Kaftan, Rodkin, 2019;Kaftan, Melnikov, 2019] показывает, что размеры контрольных сетей не должны быть слишком малы и ограничиваться исключительно размерами эпицентральных зон форшоков и афтершоков главных событий. Локальные геодезические наблюде ния в непосредственной близости от эпицентральных зон и внешних проявлений вулканизма не полностью контролируют соответствующий деформационный процесс, упуская из вида его важные стороны.…”

Section: данные наблюденийunclassified

“…Это позволяет обнаруживать и изучать деформационные предвестники землетрясений [Kaftan, Melnikov, 2018], а также пространственную миграцию деформаций, провоцирующих и сопровождающих сейсмиче ское событие [Kaftan, Melnikov, 2019]. Можно утверж дать, что достаточно плотные и обширные сети непрерывных ГНСС станций дают возможность наблюдать и изучать сейсмодеформационный процесс на стади ях сейсмической подготовки, разрядки и релаксации, представляя тем самым эмпирическую основу для раз работки моделей прогнозирования крупных и сильных сейсмических событий.…”

Section: Introductionunclassified

Long-term changes in crustal movements and deformations before and during the 2016 Kumamoto earthquake sequence

Кафтан

Tatarinov

Shevchuk

2022

Geodin. tektonofiz.

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The Kyushu Island, as well as whole Japanese archipelago, is equipped with dense GPS network (GEONET). It allows us to track the movements and deformations of the earth’s surface over long-term time intervals. In this study, based on daily determinations of the coordinates of GPS stations, analysis has been made on long-term trends in the accumulation of movements and deformations in large areas of the Kyushu Island before the series of April 14–16, 2016 Kumamoto earthquakes to identify deformation precursors and locked, immobile fault zones. The study of the seismic deformation process was performed using the data from 70 continuous permanent GPS stations for the period 2009–2016.The movement and deformation features found characterize the kinematics of the axial zone of the southwestern part of the island arc of the Japanese archipelago. The combination of coseismic compression and uplift in the center of the formed triad of deformation extrema and the consistency between subsidence and extensions at its edges demonstrate the mechanism of growth of the central region of the island arc under compression and the role of volcanism. Of particular interest in the context of the development of movements and deformations during the generation of the Kumamoto earthquakes is the behavior of the minimum displacement moduli of the GNSS sites. Analysis of their kinematics shows the formation of a zone of minimum displacements, in which subsequent strong seismic events were localized. It is shown that rather dense and extensive GNSS networks allow observing and studying the seismic-deformation process at the stages of seismic generation, discharge and relaxation, thereby providing an empirical basis for the development of models for predicting large seismic events.

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“…In recent years, GPS technology has been more and more widely used in earth science, astronomy, and other fields, and the use of GPS technology to study the law of crustal movement has made great progress. In a word, GPS technology has made outstanding contributions to monitoring global and regional crustal movement with its advantages of high observation accuracy, low equipment cost, and allweather large scale [15].…”

Section: Related Workmentioning

confidence: 99%

Construction and Application of Seismic Real-Time Data Analysis Model Based on GPS Monitoring

Yan

2022

Journal of Sensors

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GPS (global position system) monitoring has great theoretical and practical significance for understanding regional crustal deformation and disaster prevention and mitigation. Based on the GPS system differential model, this paper builds a seismic real-time data analysis model and discusses and analyzes the GNSS (global navigation satellite system) single-system single-difference model, single-system double-difference model, and dual-system double-difference model. When the model is processing the data of the GNSS dual-satellite positioning system, the proposed short-baseline ambiguity solution is studied to a certain extent and solves the problems that other common methods can only detect large cycle slips or require dual-frequency data. During the simulation process, through the study of the GPS coordinate time series, the stability of the site, the periodic change of the site, the movement law of the plate, and other information can be analyzed. The combined method is used to estimate the station noise, coordinate time series parameters, and the station velocity, and then the influence of the common mode error on the station noise, parameter estimation, and station velocity estimation is studied. The experimental results show that the average magnitude of white noise and colored noise decreases by 31.61% and 42.28%, respectively, which effectively reduces the uncertainty of parameter estimation and the uncertainty of station velocity estimation.

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Migration of Earth Surface Deformation as a Large Earthquake Trigger

Cited by 6 publications

References 11 publications

National Report for the IAG of the IUGG 2019–2022

National Report for the IAG of the IUGG 2019–2022

Long-term changes in crustal movements and deformations before and during the 2016 Kumamoto earthquake sequence

Construction and Application of Seismic Real-Time Data Analysis Model Based on GPS Monitoring

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