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Recent Geodesy and Geodynamics Articles

Recently published articles from Geodesy and Geodynamics.

Precise geoid computation using Stokes-Helmert's scheme and strict integrals of topographic effects

Available online 21 May 2019
Dongmei Guo | Huiyou He | Peng Sang

The high-precision local geoid model was computed based on the improved Stokes-Helmert′s boundary value problem and strict integrals of topographic effects. This proposed method involves three steps....

Attenuation of coda waves in the SW of High-Atlas area, Morocco

Available online 16 May 2019
Roumaissae Azguet | Ghizlane Bouskri | Youssef Timoulali | Mimoun Harnafi | Younes EL. Fellah

We investigate attenuation scattering and loss properties in Souss basin (SW of High-Atlas) as a transition zone between the High and Anti Atlas ranges. This district consists in a thinned crustal patch...

Gravity changes and crustal deformations before the Menyuan, Qinghai Ms6.4 earthquake of 2016

Available online 14 May 2019
Shusong Guo | Guoqing Zhang | Yiqing Zhu

In this study, the relative gravity data (2012–2015), GPS data-derived horizontal deformation (2011–2014) and the background vertical deformation from the leveling measurements (1970–2011) in the northeastern...

Characterizing receiver clock behaviors onboard Low Earth Orbiters: A case study of GRACE satellites

Available online 8 May 2019
Tzu-Pang Tseng | C.K. Shum | Ting-Yi Yang

Accurate estimation of clocks, for example for the Gravity Recovery And Climate Experiment (GRACE) twin-satellites, is a critical part of precise orbit determination (POD) that ensures temporal gravity...

Present-day tectonic activity along the central section of the Altyn Tagh fault derived from time series InSAR

Available online 7 May 2019
Jiangtao Qiu | Lei Liu | Chen Wang | Yang Wang

The Altyn Tagh Fault (ATF) is a large-scale complex tectonic system. In this study, the present-day crustal deformation of the central section of the ATF (90.8°E−91.58°E) was obtained using 14 images...

The application of a gravimetric forward modelling of the lithospheric structure for an estimate of the average density of the upper asthenosphere

Available online 2 May 2019
Wenjin Chen | Robert Tenzer

The average density of 3300 kg m−3 is often attributed for the asthenosphere. In this study, we inspect this value by estimating the average value of the (upper) asthenosphere based on applying the...

Electromagnetic induction in a conducting D″ layer --- I: Effects of boundary charge accumulation and the boundary conditions

Available online 28 April 2019
Ming Fang | Xinhao Liao

In response to the primary electric field originated by the fluid-core-dynamo, electric charges accumulate at the boundaries of a solid conducting D″ layer due to the poor circuitry conditions until...

Implicit expansion rate of the Earth in global plate motions

Available online 27 April 2019
Changyi Xu | Xiao Yu | Dongping Wei

Based on eight published plate motion models, we separately estimated the net area changes of tectonic plates and the area change of the solid Earth surface over geological time using the Euler vectors...

GPS measured static and kinematic offsets at near and far field of the 2011 Mw 9.0 Tohoku-Oki earthquake

Available online 22 April 2019
Param K. Gautam | Rajesh Sathyaseelan | John P. Pappachen | Naresh Kumar | Arkoprovo Biswas | George Philip | Chandra P. Dabral | Sanjit K. Pal

The Mw 9.0 Tohoku-Oki earthquake that hit the mainland Japan on 11th March, 2011 had resulted a devastating Tsunami due to an active thrusting between the Pacific and the North American Plates. Static...

Estuarine shoreline change analysis along The Ennore river mouth, south east coast of India, using digital shoreline analysis system

Available online 22 April 2019
Nithu Raj | B. Gurugnanam | V. Sudhakar | Pereira Glitson Francis

Ennore river mouth is the largest estuary and it's located in Thiruvallur, Tamil Nadu, southeastern part of India. The creek covers an area of 2.25 km2 where located 20 km north of the city centre and...

Earthquake hazard on Iraqi soil: Halabjah earthquake as a case study

Available online 20 April 2019
Abbas J. Al-Taie | Bushra S. Albusoda

Iraq is not secure from seismic hazards. Earthquakes are likely to happen and may cause substantial damage. Actually, such hazards were happened and recorded after the last earthquake in November 2017...

Co-seismic change in ocean bottom topography: Implication to absolute global mean sea level change

Available online 19 April 2019
Jiangcun Zhou | Heping Sun | Jianqiao Xu | Xiaodong Chen | Xiaoming Cui

Earthquakes perturb both the ocean bottom topography due to displacements of sea floor and the geoid due to mass redistribution, which induces the relative sea level (RSL) change. However, the relative...

Ionospheric time delay corrections based on the extended single layer model over low latitude region

Available online 8 April 2019
Sahithi Karanam | D. Venkata Ratnam | J.R.K. Kumar Dabbakuti

Ionospheric delay error is considered to be one of the most prominent factors impacting the Global Navigation Satellite Systems (GNSS) positioning and navigation accuracies. Due to dispersive nature...

Deep mantle plumes and an increasing Earth radius

Available online 5 April 2019
Matthew R. Edwards

Recent space geodetic and gravimetric studies have given indications that the Earth's radius is increasing at 0.1–0.4 mm yr−1 at present. Seismic studies have also shown that earthquakes alone could...

GRACE observed mass loss in the middle and lower Yangtze basin

March 2019
Jiangjun Ran | Natthachet Tangdamrongsub | Junchao Shi | Changqing Wang | Lihui Wang | Xiaoyun Wan

Anthropogenic architectures have a significant impact to the environment. The Three Gorges Dam (TGD), as the largest dam in the world, is a typical example, and has influenced the mass anomalies transported...

Long-term and inter-annual mass changes of Patagonia Ice Field from GRACE

March 2019
Jin Li | Jianli Chen | Shengnan Ni | Lu Tang | Xiaogong Hu

Using more than 14 years of GRACE (Gravity Recovery and Climate Experiment) satellite gravimetry observations, we estimate the ice loss rate for the Patagonia Ice Field (PIF) of South America. After...

Analysis and combination of four technique-individual EOP time series

March 2019
Lizhen Lian | Jiexian Wang | Chengli Huang

Based on four intra-technique combined solutions in SINEX format, we tried at first to assess the accuracy of each single-technique Earth Orientation Parameters (EOPs) series over a past time interval...

Prospective study of high geodetic resolution to future VGOS reference point determination

March 2019
Zhibin Zhang | Guangli Wang | Dezhen Xu | Shize Song

The fast slewing rate and wide band of the VLBI2010 Global Observing System (VGOS) telescopes are beneficial to procure more observations and to obtain VLBI reference points (RPs) of high precisions....

Numerical solutions of rotational normal modes of a triaxial two-layered anelastic Earth

March 2019
Wenbin Shen | Zhuo Yang | Zhiliang Guo | Wenying Zhang

The Earth's rotational normal modes depend on Earth model used, including the layer structures, principal inertia moments of different layers and the compliances. This study focuses on providing numerical...

Spatial variation of precipitable water vapor derived from GNSS CORS in Thailand

March 2019
Paramee Meunram | Chalermchon Satirapod

This research aims to study a distance variation of Precipitable Water Vapor (PWV) between Continuously Operating Reference Stations (CORS) in Thailand using a Precise Point Positioning (PPP) technique....

Characteristics of ionospheric scintillation climatology over Indian low-latitude region during the 24th solar maximum period

March 2019
K. Sahithi | M. Sridhar | Sarat K. Kotamraju | K.Ch. Sri Kavya | G. Sivavaraprasad | D.Venkata Ratnam | Ch. Deepthi

The amplitude and phase of L-band satellite signals are fluctuated randomly due to small scale electron density irregularity structures in the ionosphere which result in fleeting variations, known as...

Monitoring Zenithal Total Delays over the three different climatic zones from IGS GPS final products: A comparison between the use of the VMF1 and GMF mapping functions

March 2019
Benachour Labib | Jianguo Yan | Jean-Pierre Barriot | Fangzhao Zhang | Peng Feng

The International GNSS Service (IGS) final products (ephemeris and clocks-correction) have made the GNSS an indispensable low-cost tool for scientific research, for example sub-daily atmospheric water...

The effect of the differential rotation of the earth inner core on the free core nutation

March 2019
Mian Zhang | Chengli Huang

Seismic observations shows that the inner core rotates faster than the mantle and the rotation axis of the inner core may not align with the rotation axis of the mantle. Free core nutation reflects...

Russian VLBI network “Quasar”: Current status and outlook

March 2019
N. Shuygina | D. Ivanov | A. Ipatov | I. Gayazov | D. Marshalov | A. Melnikov | S. Kurdubov | M. Vasilyev | G. Ilin | E. Skurikhina | I. Surkis | V. Mardyshkin | A. Mikhailov | A. Salnikov | A. Vytnov | I. Rakhimov | A. Dyakov | V. Olifirov

This paper presents the past, present and future status of the Russian VLBI network “Quasar”. This network has been developed for at least 20 years by the Institute of Applied Astronomy of the Russian...

Lithosphere structures dynamics in the central High Atlas (Morocco) by seismic tomography and gravimetric data

Available online 15 March 2019
Y. Timoulali | M. Bouiflane | G. Bouskri | R. Azguet | Y. El Fellah

We investigate sedimentological and tectonic processes at the central High Atlas, in order to understand their functioning and to build a geodynamic model that placed the area in its current geological...

Contribution of the BDS to availability and reliability improvement: A case study of dam surface displacement monitoring in China

Available online 14 March 2019
Shanqi Huang | Junping Chen | Hu Wang

The GPS-only system is limited in dam surface monitoring because of its low availability and reliability due to the visible satellites are not enough. This dilemma is expected to be solved through incorporating...

Total least-squares EIO model, algorithms and applications

January 2019
Xingsheng Deng | Ge Liu | Tao Zhou | Sichun Peng

A functional model named EIO (Errors-In-Observations) is proposed for general TLS (total least-squares) adjustment. The EIO model only considers the correction of the observation vector, but doesn't...

Behavior of the Total Electron Content over the Arctic and Antarctic sectors during several intense geomagnetic storms

January 2019
Gustavo A. Mansilla

In this paper, the behavior of TEC at three stations located in the Arctic and Antarctic sectors during some intense geomagnetic storms in the period 2012–2016 is analyzed. The results show the opposite...

An improved empirical green function method to extract microseismic signals

January 2019
Dayong Yu | Pan Wang

In mining, reservoir impoundment and hydraulic fracturing exploitation, the induced microseismic clusters may present complex waveforms at receivers since the individual events generally arrive very...

An automatic method for road centerline extraction from post-earthquake aerial images

January 2019
Zhumei Liu | Jingfa Zhang | Xue Li

Road vector database plays an important role in post-earthquake relief, rescue and reconstruction. However, due to data privacy policy, it is difficult for general users to obtain high-precision and...

Earth rotation deceleration/acceleration due to semidiurnal oceanic/atmospheric tides: Revisited with new calculation

January 2019
Sung-Ho Na | Wenbin Shen | Jungho Cho | Kiweon Seo | Young-Hong Shin | Kwan-Dong Park | Kookyoun Youm | Sung-Moon Yoo

The global oceanic/atmospheric tides exert decelerating/accelerating secular torques on the Earth rotation. We developed new formulations to accurately calculate amounts of two kinds of secular tidal...

Coulomb stress evolution along the Kongur Extensional System since 1895 and present seismic hazard

January 2019
Wei Xiong | Xuejun Qiao | Gang Liu | Wei Chen | Zhaosheng Nie

The present-day tectonic activities on the northeastern margin of the Pamir Plateau are mainly E-W oriented extensions, among which the Kongur Extensional System (KES) plays an important role in the...

Geodynamic simulation of the WenChuan Ms8.0 and Lushan Ms7.0 earthquakes

January 2019
Li Liao | Jiansi Yang | Dongning Zhang

The Lushan Ms7.0 earthquake, occurred on April 20th, 2013, is another strong earthquake that occurred on Longmen Mountain Faults after the Wenchuan Ms8.0 earthquake. In this paper we construct a finite...

Impact of the terrestrial reference frame on the determination of the celestial reference frame

January 2019
Maria Karbon | Santiago Belda | Tobias Nilsson

Currently three up-to-date Terrestrial Reference Frames (TRF) are available, the ITRF2014 from IGN, the DTRF2014 from DGFI-TUM, and JTRF2014 from JPL. All use the identical input data of space-geodetic...

NVIS HF signal propagation in ionosphere using calculus of variations

January 2019
Umut Sezen | Feza Arikan | Orhan Arikan

Modeling Near Vertical Incidence Sounding (NVIS) High Frequency (HF) signal propagation in the ionosphere is important. Because, ionosondes which are special types of radars probing the ionosphere with...

Morphological features of continental shelf margin: Examples from the Pakistan Offshore

January 2019
Sarfraz Hussain Solangi | Adeel Nazeer | ShabeerAhmed Abbasi | Mian Muhammad Zulkifil

This paper describes various morphological features of continental shelf and their present-day analogues both present in surface and subsurface data. Most of the examples are taken from Pakistan Offshore....

Is the global sea surface temperature rise accelerating?

November 2018
H. Bâki Iz

This is an exploratory investigation to search for the presence of an acceleration in global sea surface temperature rise, which is essential to identify anthropogenic contributions to the climate change...

Combined SAI-SHAO prediction of Earth Orientation Parameters since 2012 till 2017

November 2018
Leonid Zotov | Xueqing Xu | Yonghong Zhou | Arkadiy Skorobogatov

As the participants of Earth Orientation Parameters Combination of Prediction Pilot Project (EOPC PPP), Sternberg Astronomical Institute of Moscow State University (SAI) and Shanghai Astronomical Observatory...

Analysis of sea level changes in the Caspian Sea related to Cosmo-geophysical processes based on satellite and terrestrial data

November 2018
Vladimir Kaftan | Boris Komitov | Sergey Lebedev

Analysis results of the average annual sea levels in the Caspian Sea obtained from ground and satellite observations, corresponding to solar activity characteristics, magnetic field data, and length...

Gravity wave activities in Tibet observed by COSMIC GPS radio occultation

November 2018
Attaullah Khan | Shuanggen Jin

The Gravity waves activities in the Tibetan Plateau are very complex with different effects and natures that are not clear due to the lack of high resolution data from space and also from ground. In...

Dynamo equation solution using Finite Volume Method for midlatitude ionosphere

November 2018
Feza Arikan | Umut Sezen | Orhan Arikan

Ionosphere is the layer of atmosphere which plays an important role both in space based navigation, positioning and communication systems and HF signals. The structure of the electron density is a function...

Possible origin of inert gases in hydrocarbon reservoir pools of the Zindapir Anticlinorium and its surroundings in the Middle Indus Basin, Pakistan

November 2018
Adeel Nazeer | Syed Habib Shah | Ghulam Murtaza | Sarfraz Hussain Solangi

The natural gas in several gas fields in Pakistan is associated with varying percentages of inert gases (e.g., CO2, N2, and H2S). The heating capacity of such natural gas is measured in British thermal...

Comparison of noise-levels between superconducting gravimeter and gPhone gravimeter

November 2018
Kun Zhang | Ziwei Liu | Xiaotong Zhang | Ying Jiang

For comparison of noise levels between superconducting gravimeters (SGs) and gPhone gravimeters, we conducted an experiment in which we carried out co-located observations of gravity changes by the...

Correlation of the slope of the initial part of P-wave envelope, hypocenter depth and plate boundary

November 2018
Chao Lian | Xinqiang Chen | Yuyang Kong | Yueqiang Qiao

We investigated correlation of the slope of the initial part of P-wave envelope, hypocenter depth and plate boundaries by B-Δ method, which is used to determine epicentral distances in the Japan Meteorological...

Assessment of positioning performances in Italy from GPS, BDS and GLONASS constellations

November 2018
Ambrogio Maria Manzino | Paolo Dabove | Neil Gogoi

The use of multiple GNSS constellations has been beneficiary to positioning performances and reliability in recent times, especially in low cost mass-market setups. Along with GPS and GLONASS, GALILEO...

Cassini's motions of the Moon and Mercury and possible excitations of free librations

November 2018
Yu.V. Barkin | Jose Ferrandiz | Shuanggen Jin | M. Yu. Barkin

On the basis of conditionally-periodic solutions of Hamiltonian systems at resonance of main frequencies Cassini's motions, their stability, Cassini's angle and periods of free librations of the Moon...

Crustal extension in North China since the Mesozoic: A numerical study

Available online 24 October 2018
Feng Lin | Mian Liu

The ∼1.8 billion years old North China Craton (NCC) has been thermally rejuvenated during the Mesozoic, experiencing two major phases of crustal extension and volcanism since then. The earlier phase...

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