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Recent Geodesy and Geodynamics Articles

Recently published articles from Geodesy and Geodynamics.

Real-time and post–mission kinematic precise point positioning performance analysis in marine environments

Available online 10 October 2020
Serdar Erol | Reha Metin Alkan | İ. Murat Ozulu | Veli İlçi

This article focuses on the performance analysis of both real-time and post-mission kinematic precise point positioning (PPP) in challenging marine environments. For this purpose, a real dynamic experiment...

Rainfall prediction by using ANFIS times series technique in South Tangerang, Indonesia

Available online 9 October 2020
Wayan Suparta | Azizan Abu Samah

Excessive rainfall is one of the triggers for the flooding phenomenon, especially in the tropics with flat or concave areas. Some critical points in the South Tangerang region, which are currently one...

Active tectonic deformation around the Tarim Basin inferred from dense GPS measurements

Available online 8 October 2020
Dongzhen Wang | Bin Zhao | Jiansheng Yu | Kai Tan

The surrounding area of the Tarim Basin is featured by active tectonic deformation and intense seismic activity. The study of the crustal deformation characteristics of this area will help revealing...

Geostatistical evaluation of spatial variability of land subsidence rates in Lagos, Nigeria

September 2020
Femi Emmanuel Ikuemonisan | Vitalis Chidi Ozebo | Olawale Babatunde Olatinsu

Accurate land subsidence prediction is fundamental for effective management of land subsidence and other associated geohazards. Lagos, the most densely populated city in Nigeria, has been adversely...

New estimation of triaxial three-layered Earth's inertia tensor and solutions of Earth rotation normal modes

September 2020
Wenying Zhang | Wenbin Shen

Until now, the calculation of the principal inertia moment of the triaxial three-layered Earth mainly adopts the scaling method. This method assumes that the corresponding principal inertia axes of...

Simultaneous approximation of a function and its derivatives by Sobolev polynomials: Applications in satellite geodesy and precise orbit determination for LEO CubeSats

September 2020
M. Kiani

The objectives of this paper are twofold: (1) to present a new method of approximation such that the function and some of its derivatives are simultaneously approximated; and (2) to investigate the...

Regional TEC modelling over Africa using deep structured supervised neural network

September 2020
Mefe Moses | Joseph Danasabe Dodo | Lazarus Mustapha Ojigi | Kola Lawal

A deep structured supervised neural network (NN) model has been developed for modelling of ionospheric vertical total electron content (VTEC) using observations from over 100 Global Navigation Satellite...

Scaled unscented transformation method and adaptive Monte Carlo method used for effects of fault parameters estimation on green function matrix in slip distribution inversion

September 2020
Leyang Wang | Yingwen Zhao | Chuanyi Zou | Xiong Zhao

The elements of Green function matrix are the nonlinear functions of fault parameters estimation, the randomness of fault parameters estimation causes that the slip distribution inversion turns to be...

Offset measurements along active faults based on the structure from motion method – A case study of Gebiling in the Xorkoli section of the Altyn Tagh Fault

September 2020
Baosong Xiong | Xue Li

This study reconstructs high-precision three-dimensional (3D) surface models using aerial imagery derived from unmanned aerial vehicles (UAVs) with the structure from motion (SfM) method. By combining...

Differentiation of recent local geodynamic and seismic processes of technogenic-loaded territories based on the example of Dnister Hydro Power Complex (Ukraine)

September 2020
Ihor Savchyn | Roman Pronyshyn

The purpose of the study is to analyse and interpret recent local geodynamic and seismic processes on the territory of Dnister Hydro Power Complex that appeared as a result of the additional technogenic...

Spatiotemporal variation of vertical displacement driven by seasonal hydrological water storage changes in Kalimantan, Indonesia from GPS observation

September 2020
Leni Sophia Heliani | Cecep Pratama | Danardono | Nurrohmat Widjajanti | Eko Hanudin

The Global Positioning System (GPS) Indonesian Continuously Operating Reference Stations (InaCORS) network has been used for various applications ranging from land administration to geodynamics. Crustal...

Optimizing the Global Digital Elevation Models (GDEMs) and accuracy of derived DEMs from GPS points for Iraq's mountainous areas

September 2020
Shazad Jamal Jalal | Tajul Ariffin Musa | Taher Hama Ameen | Ami Hassan Md Din | Wan Anom Wan Aris | Jwan Mohammad Ebrahim

Optimizing the combined horizontal and vertical accuracy of the well-known Global Digital Elevation Models (GDEMs) of various resolutions for each country and region especially in Iraq's mountainous...

Diurnal variation of precipitable water vapor over Central and South America

Available online 10 September 2020
Amalia Meza | Luciano Mendoza | María Paula Natali | Clara Bianchi | Laura Fernández

Annual and seasonal diurnal precipitable water vapor (PWV) variations over Central and South America are analyzed for the period 2007–2013. PWV values were obtained from Global Navigation Satellite...

Atmosphere, ocean and lithosphere interaction as a possible drive of earthquake triggering

Available online 11 August 2020
Victor Volkov | Jan Mrlina | Mstislav Dubrov | Vladimir Smirnov | Sergey Golovachev | Vaclav Polak

The comparison of tiltmeter and strainmeter data in the periods of the strongest earthquakes with tropical cyclone activities in the World Ocean during January–April 2014 is made. Main features of the...

Earth Core's stresses variation in Central Asian earthquakes region

July 2020
Ikram Atabekov

Tectonic stresses of Central Asia (limited by geographic coordinates 36–46°N, 56–76° E) over the recent times are modeled based on moment elasticity, taking into account the focal mechanism of earthquakes....

Complex of general seismic zoning maps OSR-2017 of Uzbekistan

July 2020
Turdali Usmanalievich Artikov | Roman Solomonovich Ibragimov | Tatyana Lyudvigovna Ibragimova | Myurodjon Аbdyurahimdjanovich Mirzaev

The quantitative assessment of seismic hazard of Uzbekistan has been examined, and new maps of seismic zoning has been developed. Quasihomogeneous seismological areas and seism-generating zones are...

A preliminary experiment of determining the geopotential difference using two hydrogen atomic clocks and TWSTFT technique

July 2020
Kuangchao Wu | Ziyu Shen | Wenbin Shen | Xiao Sun | Chenghui Cai | Yifan Wu

General relativity theory (GRT) concludes that a precise clock ticks at different running rates if it is under the influence of different geopotentials. Therefore, by comparing the running rates of...

A new high-precision gravity solid tidal model for Precision Gravity Measurement Facility

July 2020
Chuang Xu | Rongrui Xu | Wenrui Zeng | Jianguo Yan

It is significant for establishing gravity datum to construct precise gravity solid tidal model. A simple method with relatively low performance is to interpolate tidal parameters from the global gravity...

A new and high-precision gravity base network in the south of the Tibetan Plateau

July 2020
Lelin Xing | Lei Bai | Xiaowei Niu | Peng Sang

A new gravity base network in the south of the Tibetan Plateau was established with a FG5X absolute gravimeter and three CG-6 gravimeters. The gravity base network consists of 10 absolute gravity points...

Identifying the most explainable fault ruptured of the 2018 Palu-Donggala earthquake in Indonesia using coulomb failure stress and geological field report

July 2020
Endra Gunawan | Sri Widiyantoro | Pepen Supendi | Takuya Nishimura

This study investigates the relation between the Coulomb failure stress of the mainshock with the aftershocks sequence following the 2018 Palu-Donggala earthquake in Indonesia. We calculate the Coulomb...

Kinematics of faults in Bengal Basin: Constraints from GPS measurements

July 2020
Mallika Mullick | Dhruba Mukhopadhyay

The crustal deformation of Bengal Basin is constrained by motion on faults within the basin and those along the basin boundaries on all sides except the southern margin. Eocene Hinge Zone (EHZ), the...

Template-based smoothing functions for data smoothing in Geodesy

July 2020
M. Kiani

This paper is aimed at the derivation of a discrete data smoothing function for the discrete Dirichlet condition in a regular grid on the surface of a spheroid. The method employed here is the local...

A new empirical equation of shear wave velocity to predict the different peak surface accelerations for Jakarta city

Available online 5 July 2020
Munirwansyah Munirwansyah | Mohamad Ali Fulazzaky | Halida Yunita | Reza Pahlevi Munirwan | Jonbi Jonbi | Kasni Sumeru

Site condition and bedrock depth play important roles in the determination of peak surface acceleration (PSA) values by earthquake motions. The soil parameters of shear wave velocity (Vs) and standard...

Geodetic slip rate and locking depth of east Semangko Fault derived from GPS measurement

May 2020
Satrio Muhammad Alif | Erlangga Ibrahim Fattah | Munawar Kholil

65 km Semangko Fault is part of southern segments of Sumatran Fault Zone (SFZ) which is complex corresponds to the transition from the strike-slip regime of the SFZ to the normal faulting tectonics...

Global investigation of the ionospheric irregularities during the severe geomagnetic storm on September 7–8, 2017

May 2020
Ramazan Atıcı | Selçuk Sağır

In this study, the global effects of the severe geomagnetic storm on the Earth's ionosphere on September 5–9, 2017 with Coronal Mass Ejections (CMEs) associated with X-9.3 flares on September 6, 2017...

Comparison of TEC prediction methods in mid-latitudes with GIM maps

May 2020
Olga Maltseva | Galina Glebova

There are many long-term and short-term prediction methods of Total Electron Content (TEC) that need to be tested for each specific region. Recently, much attention has been paid to testing TEC models...

Temporal variations of the ionospheric disturbances due to the seasonal variability over Turkey using IONOLAB-FFT algorithm

May 2020
Secil Karatay

The ionosphere is exposed to forcing from below due to gravitational, geomagnetic and seismic activities, and above due to solar wind. These forces cause some medium and large scale irregularities and...

Determination of Istanbul geoid using GNSS/levelling and valley cross levelling data

May 2020
Müge Albayrak | Mustafa Tevfik Özlüdemir | Mohammad Mohseni Aref | Kerem Halicioglu

The Istanbul GPS Triangulation Network (IGTN) and the Istanbul Levelling Network (ILN), established in 2006, provide data for the determination of a local GNSS/levelling geoid model. These networks'...

Remote sensing ionospheric variations due to total solar eclipse, using GNSS observations

May 2020
Mohamad Mahdi Alizadeh | Harald Schuh | Saeed Zare | Sahar Sobhkhiz-Miandehi | Lung-Chih Tsai

For years great interest has been taken in the effects of physical phenomena on ionosphere structure. A total solar eclipse was visible in North America on August 21st, 2017. This event offered a great...

Performance evaluation of neural network TEC forecasting models over equatorial low-latitude Indian GNSS station

May 2020
G. Sivavaraprasad | V.S. Deepika | D. SreenivasaRao | M. Ravi Kumar | M. Sridhar

Global Positioning System (GPS) services could be improved through prediction of ionospheric delays for satellite-based radio signals. With respect to latitude, longitude, local time, season, solar...

Using satellite altimetry leveling to assess the marine geoid

March 2020
Zhengtao Wang | Nengfang Chao | Dingbo Chao

Based on the concept of Global Position System (GPS)/leveling, the satellite altimetry leveling (SAL) is first proposed to evaluate the marine geoid. SAL is derived by the difference among the mean...

A numerical model for the gravimetric recovery of sub-lithospheric mantle structures

March 2020
Robert Tenzer

It is a well-known fact that the long-wavelength terrestrial geoid undulations are mainly attributed to deep mantle density heterogeneities, while more detailed features in the geoid geometry are associated...

Determination of NavIC differential code biases using GPS and NavIC observations

March 2020
K. Siva Krishna | D. Venkata Ratnam

Delay bias between the pseudo range code is called Differential Code Bias (DCB), this is one of the main error sources to estimate the precise Total Electron Content (TEC) in ionosphere. Differential...

Local geoid height approximation and interpolation using moving least squares approach

March 2020
M. Kiani

In this paper an introduction of the moving least squares approach is presented in the context of data approximation and interpolation problems in Geodesy. An application of this method is presented...

Real data extraction process and procedure of geophysical exploration profile

March 2020
Jiapei Wang | Guangliang Yang | Chongyang Shen | Hongbo Tan | Guiju Wu | Kai Sun

In this paper, we present an open python procedure with Jupyter notebook, for data extraction and vectorization of geophysical exploration profile. Constrained by observation routes and traffic conditions,...

Present-day crustal deformation revealed active tectonics in Yogyakarta, Indonesia inferred from GPS observations

March 2020
Nurrohmat Widjajanti | Cecep Pratama | Parseno | T. Aris Sunantyo | Leni Sophia Heliani | Bilal Ma'ruf | Dedi Atunggal | Dwi Lestari | Hilmiyati Ulinnuha | Arinda Pinasti | Riska Fajrul Ummi

We investigated the active crustal structure in Yogyakarta, Indonesia, using new and denser Global Positioning System (GPS) data. Deformation rate estimated from five years (2013–2018) of observations...

The background noise level of vertical pendulum tiltmeter in China

March 2020
Ying Zhao

By using the observation data of the vertical pendulum tiltmeter in China, the influence of different sampling rates on the results of power spectral density is studied, and the background noise level...

Possible precursory anomalies in ground water level associated with the Wenchuan Ms 8.0 earthquake in 2008, Sichuan, China

March 2020
Chenglong Liu | Guangcai Wang | Zheming Shi | Dan Zhao | Hui Zhang

We have examined the water level data from 16 wells in Sichuan province, China, recorded before the Wenchuan Ms8.0 earthquake occurred in 2008. We found that the data of 5 among these wells exhibit...

Characterisation and mapping of land subsidence based on geodetic observations in Lagos, Nigeria

March 2020
Femi Emmanuel Ikuemonisan | Vitalis Chidi Ozebo

The pervasive seasonal flooding, aquifer contamination, and saline water intrusion in parts of Lagos are some of the long-term effects of land subsidence caused by the excessive groundwater exploitation...

The rigorous adjustment of the global mean sea level budget during 2005–2015

Available online 12 March 2020
H. Bâki Iz | T.Y. Yang | C.K. Shum

Global mean sea level budget is rigorously adjusted during the period 2005–2015. The emphasis is to provide the best estimates for the linear rates of changes (trends) of the global mean sea level budget...

Excitations of length-of-day seasonal variations: Analyses of harmonic and inharmonic fluctuations

January 2020
Jiesi Luo | Wei Chen | Jim Ray | Jiancheng Li

Geophysical excitations of length-of-day (LOD) variations is of great significance in understanding changes in the Earth's spin rate and interactions between geophysical fluids and the solid Earth,...

On the realization of seismic microzonation of Almaty (Kazakhstan) in ground accelerations based on the “continual” approach

January 2020
N.V. Silacheva | U.K. Kulbayeva | N.A. Kravchenko

Seismic microzonation for Almaty city for the first time use probabilistic approach and hazard is expressed in terms of not only macroseismic intensity, but also Peak Ground Acceleration (PGA). To account...

Useful predictions ahead of large earthquakes and lessons learned for future progress

January 2020
Ragnar Stefánsson

A significant basis for this article is the outcome of 4 multinational research projects which were carried out in South-West Iceland from 1988–2006, focusing on crustal processes that preceded two...

Surface seasonal mass changes and vertical crustal deformation in North China from GPS and GRACE measurements

January 2020
Shuya Li | Wenbin Shen | Yuanjin Pan | Tengxu Zhang

The Earth is an elastic body, and the surface mass loading changes will lead to elastic loading deformation on the surface of the Earth. In this study, we investigated the surface seasonal mass changes...

Positioning performance analysis on combined GPS/BDS precise point positioning

January 2020
Jing Xiong | Fei Han

Combining the observation data from five Multi-GNSS Experiment (MGEX) stations with the precise orbit and clock products from Global Positioning System (GPS) and BeiDou Navigation Satellite System (BDS),...

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