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Recent Geodesy and Geodynamics Articles

Recently published articles from Geodesy and Geodynamics.

Estimation of maximum mass velocity from macroseismic data: A new method and application to archeoseismological data

July 2019
M.V. Rodkin | A.M. Korzhenkov

An important task in seismic hazard assessment is the estimation of intensity and frequency of rare strong seismic shaking, in particular, the long-term peak ground velocity values (PGVs). A recently...

Potential traces of earthquakes in the ancient city of Kytaia, Kerch Peninsula, Crimea

July 2019
E.A. Molev | A.M. Korzhenkov | A.N. Ovsyuchenko | A.S. Larkov

In this paper, the authors studied the traces of destruction in the fortress walls and houses of the Bosporan city of Kytaia. The study of this city has been ongoing since 1970. Over the past time,...

Intensities of ancient earthquakes, earthquake magnitude and soil dynamics effects. Evidence from the 1750 Croatia earthquake

July 2019
Stathis C. Stiros

A problem in the study of pre-instrumental earthquakes is how to reconstruct their parameters based on usually fragmentary evidence of seismic intensities, which reflect the combined effect of fault...

The usability of GNSS mass-market receivers for cadastral surveys considering RTK and NRTK techniques

July 2019
Paolo Dabove

Nowadays many positioning techniques and methods are applied to the cadastral surveys. Starting from last decade, GPS/GNSS positioning had become one of the most used methodology thanks to the rapid...

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

July 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

July 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

July 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

July 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

July 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

July 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...

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

Available online 15 July 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...

Crustal density structure of the southern segment of the Liaocheng-Lankao fault, China

The 1:200,000 middle-large scale Bouguer gravity anomaly data covering the southern segment of the Liaocheng-Lankao fault (SLLF) and its vicinity are analyzed with two methods. First, the Bouguer gravity...

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

Available online 9 July 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...

Reassessment of electromagnetic core-mantle coupling and its implications to the Earth's decadal polar motion

Available online 8 July 2019
Weijia Kuang | Benjamin F. Chao | Jianli Chen

The observed Earth's polar motion on decadal time scales has long been conjectured to be excited by the exchange of equatorial angular momentum between the solid mantle and the fluid outer core, via...

The progress of laser ranging technology at Shanghai Astronomical Observatory

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...

Electromagnetic monitoring in the region of seismic activization (on the Gorny Altai (Russia) example)

Available online 4 July 2019
N.N. Nevedrova | A.M. Sanchaa | A.E. Shalaginov | S.M. Babushkin

Based on the analysis of the field data of nonstationary electromagnetic soundings with different installations, the evolution of the stressed state of the geological massif in the epicentral region...

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

Available online 4 July 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...

The formation bulk density prediction for intact and fractured siliciclastic rocks

Available online 1 July 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,...

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

Available online 28 June 2019
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...

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

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...

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

Available online 4 June 2019
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...

Deep mantle plumes and an increasing Earth radius

May 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...

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

May 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

May 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

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

May 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

May 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

May 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

May 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...

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

May 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

May 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...

GRACE observed mass loss in the middle and lower Yangtze basin

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

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

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...

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