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Recent Geodesy and Geodynamics Articles

Recently published articles from Geodesy and Geodynamics.

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...

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

Available online 1 July 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...

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...

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...

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'...

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

Available online 29 May 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...

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

Available online 27 May 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...

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

Available online 26 May 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...

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

Available online 28 April 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...

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

Available online 22 April 2020
Kuangchao Wu | Ziyu Shen | Wen-Bin 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...

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

Available online 22 April 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...

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...

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...

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...

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...

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...

Complex of general seismic zoning maps OSR-2017 of Uzbekistan

Available online 26 March 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...

Earth Core's stresses variation in Central Asian earthquakes region

Available online 24 March 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....

Kinematics of faults in Bengal Basin: Constraints from GPS measurements

Available online 19 March 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

Available online 18 March 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...

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...

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),...

Sensitivity analysis of ground motion prediction equation using next generation attenuation dataset

January 2020
Sina Sabermahani | Parisa Ashjanas

Seismic hazard assessment is an important stage in earthquake engineering. Since the ground motion prediction equation (GMPE) has a key role in seismic hazard assessment, it is necessary to determine...

Crustal thickness beneath Atlas region from gravity, topographic, sediment and seismic data

January 2020
Franck Eitel Kemgang Ghomsi | Robert Tenzer | Sévérin Nguiya | Animesh Mandal | Robert Nouayou

The Atlas region in northwest Africa is characterized by the Quaternary volcanism and elevated topography with past complex tectonic mitigation between the African and European plates. Geodynamics of...

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,...

A study of clock effects in Newton–Maxwell formalism

January 2020
Sankar Hajra

Many measurements on the time gain/loss of the atomic clocks orbiting the spinning Earth have been done. The time gain/loss of the atomic clocks orbiting the spinning Earth is called gravitomagnetic...

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...

A tectonic geodesy mapping software based on QGIS

January 2020
Zhe Fang | Guoyan Jiang | Caijun Xu | Shuai Wang

To overcome the high cost of learning, non-visual operation, and cumbersome steps of fine-tuning map elements in Generic Mapping Tools (GMT) and other geoscience mapping softwares, we present the Tectonic...

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...

The progress of laser ranging technology at Shanghai Astronomical Observatory

November 2019
Zhibo Wu | Haifeng Zhang | Huarong Deng | Mingliang Long | Zhien Cheng | Zhongping Zhang | Wendong Meng

As an important station of International Laser Ranging Service (ILRS), Shanghai Astronomical Observatory (SHAO) has upgraded Satellite Laser Ranging (SLR) system with high repetition rate and achieved...

Development and prospect of mobile gravity monitoring and earthquake forecasting in recent ten years in China

November 2019
Yiqing Zhu | Fang Liu | Guoqing Zhang | Yunma Xu

After the Wenchuan earthquake in 2008, China Earthquake Administration has strengthened the monitoring of mobile gravity and earthquake forecasting. This paper mainly analyzes the development of mobile...

The subduction of the Copiapó aseismic ridge, is the causing of the formation of metallic minerals deposits in north of Chile and Argentina?

November 2019
Mario Gimenez | Gemma Acosta | Orlando Alvarez | Agustina Pesce | Federico Lince Kinger | Andres Folguera

The results obtained in this work evince that the metallic mineral deposits located in the northern region of the Chilean-Pampean flat slab (in northern Chile and north-western Argentina), at approximately...

Optimum choice of parameters and numerical schemes for a regional gravimetric Moho recovery

November 2019
Samurdhika Rathnayake | Robert Tenzer

Despite practical limitations of isostatic theories to model the Moho geometry are well-known, gravimetric methods are often used in terrestrial studies of crustal structure in regions with a low seismic...

The formation bulk density prediction for intact and fractured siliciclastic rocks

November 2019
Babatunde Yusuf | Olalere Oloruntobi | Stephen Butt

The formation bulk density is one of the most important rock properties required for reservoir evaluation and geomechanical analysis. In intervals where the formation bulk density logs are not acquired,...

Anomalies identification of Earth's rotation rate time series (2012–2017) for possible correlation with strong earthquakes occurrence

November 2019
Fabrizio Ambrosino | Lenka Thinová | Miloš Briestenský | Carlo Sabbarese

The analysis of the Earth's rotation rate time series, from January 1,2012 till December 31,2017, is performed using two different time series analysis methods, both based on signal decomposition joined...

Influencing factors on the accuracy of local geoid model

November 2019
Shazad Jamal Jalal | Tajul Ariffin Musa | Ami Hassan Md Din | Wan Anom Wan Aris | WenBin Shen | Muhammad Faiz Pa'suya

Different modification methods and software programs were developed to obtain accurate local geoid models in the past two decades. The quantitative effect of the main factors on the accuracy of local...

Hydrological mass variations in the Nile River Basin from GRACE and hydrological models

November 2019
Mostafa Abd-Elbaky | Shuanggen Jin

Terrestrial water storage (TWS) change is a key component of the global water cycle and hydrologic cycle. Therefore, it is of significance to quantify TWS variations at large scale and understand how...

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