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Recent Geodesy and Geodynamics Articles

Recently published articles from Geodesy and Geodynamics.

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...

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

Available online 15 March 2019
Wen-Bin 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...

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

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....

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

Available online 24 January 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

Available online 31 December 2018
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

Available online 10 December 2018
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...

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...

Pre-seismic ionospheric anomalies of the 2013 Mw = 7.7 Pakistan earthquake from GPS and COSMIC observations

September 2018
Munawar Shah | Shuanggen Jin

The seismo-ionospheric anomalies may provide some insights about the earthquake. However, pre-seismic ionospheric anomalies are still challenging. In this paper, seismo-ionospheric anomalies are investigated...

Location correction technique based on mobile communication base station for earthquake population heat map

September 2018
Xiaoli Liu | Xue Li | Xiaolin Chen | Zhumei Liu | Shengle Li

China has mobile phone penetration rate of over 96.2%. Mobile phone has become the largest Internet terminal for Chinese Internet users. Population geographic distribution in earthquake zones can be...

Research on variety characteristics of mainland China troposphere based on CMONOC

In this research, we processed the GPS and meteorological data from about 220 stations of Crustal Movement Observation Network of China (CMONOC) observed in 2014 and derived the Zenith Total Delay (ZTD)...

Performance analysis of a new baseline-based SS-Y extensometer

September 2018
Linbin Wu | Zhaosheng Nie

In order to solve the problems in the observation with the SS-Y extensometer, such as background noise and discontinuity of earth tide curve, this paper proposed to improve the stability of the instrument...

Detection of Earth's free oscillation excited by the Japan Mw9.0 Earthquake using different tiltmeter and strainmeter

September 2018
Yan Zhang | Fangjie Meng

The observatory network of the Crustal Deformation China Seismological Bureau was equipped with vertical pendulum tiltmeter, borehole tiltmeter, tunnel extension meters, multi-component borehole strainmeter,...

Isostatic anomaly characteristics and tectonism of the New Britain Trench and neighboring Papua New Guinea

In this paper, we calculated Bouguer gravity anomalies and Airy-Heiskanen isostatic anomalies in the New Britain Trench and surrounding areas of Papua New Guinea. The calculations are based on a topographic...

Anomalies of geomagnetic field related to natural and technogenic events in Charvak area

September 2018
Valijon Yusupov

Based on the long-term geomagnetic observations in the area of the Charvak reservoir, the analysis results of geomagnetic variations are presented in the article. It is revealed that local anomalies...

Tectonic evolution of structures in Southern Sindh Monocline, Indus Basin, Pakistan formed in multi-extensional tectonic episodes of Indian Plate

September 2018
Shabeer Ahmed | Sarfraz Hussain Solangi | Muhammad Saeed Khan Jadoon | Adeel Nazeer

There are a number of structures and structural styles found in extensional tectonic settings of the world, and it is a big challenge to study the evolution of these structures. Evolution of structures...

Online computation of International Reference Ionosphere Extended to Plasmasphere (IRI-Plas) model for space weather

September 2018
Umut Sezen | T.L. Gulyaeva | Feza Arikan

Ionosphere is the most challenging part of Space Weather with its spatio-temporal variability and dispersive nature. Ionospheric models are very important in reducing positioning error in GNSS system....

Source model of 2016 Mw6.6 Aketao earthquake, Xinjiang derived from Sentinel-1 InSAR observation

September 2018
Yun Ma | Xuejun Qiao | Wei Chen | Yiyan Zhou

On 25 November 2016 (14:24:30 UTC), an Mw6.6 earthquake occurred in Aketao county of Xinjiang. We derived the coseismic deformation field of the earthquake from ESA's Sentinel-1B images and inverted...

Sedimentary structure of the western Bohai Bay basin and other basins in North China revealed by frequency dependent P-wave particle motion

Available online 27 September 2018
Chenhao Yang | Fenglin Niu

High-resolution seismic models of sediment basins are critical inputs for earthquake ground motion prediction and petroleum resource exploration. In this study we employed a newly developed technique...

Houston16: A stable geodetic reference frame for subsidence and faulting study in the Houston metropolitan area, Texas, U.S.

Houston, Texas, is one of the earliest regions to employ continuous GPS technology for land subsidence monitoring. Currently, there are over 200 permanent GPS stations located in the greater Houston...

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