2411-3336 2541-9404 Записки Горного института Journal of Mining Institute Санкт-Петербургский горный университет императрицы Екатерины ΙΙ Empress Catherine II Saint Petersburg Mining University PHHTOE pmi-16324 https://pmi.spmi.ru/pmi/article/view/16324 Геотехнология и инженерная геология Geotechnical Engineering and Engineering Geology Crustal movement model in the ITRF2020 – a case study in Northern Vietnam Модель движения земной коры в ITRF2020 – исследование на примере Северного Вьетнама Tham Bui Thi Hong Тхам Буй Тхи Хонг Tham Bui Thi Hong bththam@hunre.edu.vn 0000-0002-3932-4040 Ханойский университет природных ресурсов и окружающей среды (Ханой, Вьетнам) Hanoi University of Natural Resources and Environment (Hanoi, Vietnam) Thanh Phi Truong Тхань Фи Чыонг Thanh Phi Truong ptthanhdc@hunre.edu.vn 0000-0003-0421-6557 Ханойский университет природных ресурсов и окружающей среды (Ханой, Вьетнам) Hanoi University of Natural Resources and Environment (Hanoi, Vietnam) 24 12 2024 2025 271 120 130 04 10 2023 24 09 2024 25 02 2025 © 2024 Буй Тхи Хонг Тхам, Фи Чыонг Тхань © 2024 Bui Thi Hong Tham, Phi Truong Thanh 2024 Буй Тхи Хонг Тхам, Фи Чыонг Тхань Bui Thi Hong Tham, Phi Truong Thanh Эта статья доступна по лицензии Creative Commons Attribution 4.0 International (CC BY 4.0) This article is licensed under a Creative Commons Attribution 4.0 International License (CC BY 4.0) https://pmi.spmi.ru/pmi/article/view/16324

Значение скорости движения земной коры на севере Вьетнама, достигшее 38 единиц ГНСС по различным версиям Международной земной системы координат (ITRF2000, ITRF2005, ITRF2008), приведено к последней версии ITRF2020. Величина скорости движения земной коры унифицирована в динамической системе координат. Исследования показывают, что скорость движения земной коры составляет около 35 мм/год, а направление движения – с северо-запада на юго-восток. Для построения модели движения земной коры в северной части Вьетнама произведена высокоточная оценка данных о скорости движения коры с 38 станций, работающих в ITRF2020. Модель скорости движения земной коры построена с использованием метода коллокации в виде функции Маркова 3-го порядка. Использовались данные 34 из 38 станций, остальные четыре применялись в качестве контрольных. Скорость движения коры составляет 2 мм/год, направление смещения 2 град. Модель является первой моделью движения земной коры на севере Вьетнама, построенной в динамической системе координат ITRF2020. Результаты исследования применимы для теоретического и практического изучения движения земной коры. Этапы построения модели скорости движения, рассмотренные в работе, могут быть использованы в других исследованиях на территории Вьетнама.

In the North area of Vietnam, the crustal movement velocity of 38 GNSS points belonging to different international Earth reference frames (ITRF2000, ITRF2005, ITRF2008) is adjusted to the international Earth reference frame ITRF2020. This is the latest frame up to now. Since then, the picture of crustal movement in the North area of Vietnam has been unified in a dynamic coordinate system. In the study area, the rate of crustal movement is about 35 mm/year, and the direction of displacement is from northwest to southeast. To build a model of the crustal movement of the Earth in the northern area of Vietnam, the movement velocity data of 38 stations in ITRF2020 is evaluated with high accuracy. All points are also satisfactory. And then, the crustal movement velocity model is built by using the collocation method in the form of the 3-order Markov function. Within 38 stations, 34 stations are used to build the model and 4 remaining stations are used as checked stations. The obtained results show that the Earth's crust movement velocity model has an accuracy of about 2 mm/year for movement velocity and 2 deg for movement direction. This is the first model of Earth's crust movement in the North of Vietnam that has been built in the latest dynamic coordinate system ITRF2020. These results have important significance in the research and practical application of the movement of the Earth's crust. The steps of building the movement velocity model in this study can be applied to other experimental areas in the territory of Vietnam.

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