首页期刊导航|大地测量与地球动力学（英文版）
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大地测量与地球动力学（英文版）
中国地震局地震研究所
大地测量与地球动力学（英文版）

中国地震局地震研究所

姚运生

季刊

1674-9847

Jgg09@163.com

027-87864009

430071

武汉市武昌洪山侧路40号

大地测量与地球动力学（英文版）/Journal Geodesy and GeodynamicsCSCD北大核心
查看更多>>《大地测量学与地球动力学 》由地震研究所、中国地震局、科学出版社和其他六个机构联合主办。 致力于在世界各地的大地测量学与地球动力学领域以英文发表高质量的科学论文。 其目的是促进大地测量学与地球动力学的结合，鼓励大地测量学在地球科学领域的应用，并促进全世界的科学研究活动。 该期刊主要发表在大地测量学，地球动力学和灾害科学等领域的新颖研究成果。
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    Co-seismic surface displacement of the June 21,2022 Mw6 Khōst,Afghanistan earthquake from InSAR observations

    Prohelika DalalBatakrushna SenapatiBhaskar Kundu
    201-208页
    查看更多>>摘要：A robust estimation of the earthquake location,seismic moment,and fault geometry is essential for objective seismic hazard assessment.Seismic events in a remote location,specifically in the absence of seismic and GNSS networks,can be investigated effectively using the InSAR-based technique.This study adopts the Differential Interferometric SAR(DInSAR)technique to quantify the co-seismic surface displacement caused by the June 21,2022,Khōst Mw6 earthquake that occurred along the western plate boundary between the Indian and Eurasian plate.The interferograms show that the maximum surface deformation occurred on the northwest and southwest of the fault line.From coherence,the Line of Sight(LOS)displacement,and the co-seismic surface displacement analysis,it has been observed that surface deformation was most pronounced in the southwest region of the fault line,and the surface has moved to the opposite direction along the fault line,which indicates a sinistral slightly oblique strike-slip movement.This InSAR-based observation appears consistent with the seismic waveforms derived from co-seismic surface displacements.Further,it has been argued that the slip deficit accumulated during the period of the last about 48 years along the frontal region of the northward extension of the Suleiman range and associated fault zone is qualitatively estimated at about 1.5 m,which is consistent with the seismic waveforms derived finite slip model.
      原文链接:
    • 国家科技期刊平台
    • NETL
    • NSTL
    • 万方数据

    Lithospheric strength of the Anatolian plateau and implications for strong earthquake activity in Turkey

    Yuhang PanShi ChenWen Shi
    209-218页
    查看更多>>摘要：On February 6,2023,the doublet earthquake including two main shocks with magnitudes Mw7.8 and Mw7.5,occurred near the western side of the East Anatolian Fault at the southeast boundary of the Anatolian Plateau in Turkey.Based on the WGM2012 Bouguer gravity anomaly data and the Etopo1 topography data,this study first introduced a joint inversion of admittance and coherence functions and used the Bayesian optimal parameter estimation method to obtain the effective elastic thickness Te and loading ratio F of the lithosphere for various tectonic units in the Anatolian Plateau.Secondly,we dis-cussed the characteristics and influencing factors of the lithospheric mechanical strength and analyzed its relationship with seismic activity.The lithospheric mechanical strength of the Anatolian Plateau showed clear lateral heterogeneity and a"weak-strong-weak"spatial pattern from east to west,reflecting various tectonic processes.At last,the strong seismic activity was found where the lithospheric strength was low in the Anatolian Plate.We also incorporated GPS strain rate and other results to investigate the tectonic background and primary causes of the Mw7.8 and Mw7.5 doublet earthquakes in Turkey.The results have a good insight into urban safety design in the Turkish region,including post-disaster rehabilitation,earthquake hazard assessment,and loss reduction.
      原文链接:
    • 国家科技期刊平台
    • NETL
    • NSTL
    • 万方数据

    Probing signals of atmospheric gravity waves excited by the July 29,2021 Mw8.2 Alaska earthquake

    Geng ZhangJianqiao XuXiaodong ChenHeping Sun...
    219-229页
    查看更多>>摘要：It is commonly believed that the atmosphere is decoupled from the solid Earth.Thus,it is difficult for the seismic wave energy inside the Earth to propagate into the atmosphere,and atmospheric pressure wave signals excited by earthquakes are unlikely to exist in atmospheric observations.An increasing number of studies have shown that earthquakes,volcanoes,and tsunamis can perturb the Earth's atmosphere due to various coupling effects.However,the observations mainly focus on acoustic waves with periods of less than 10 min and inertial gravity waves with periods of greater than 1 h.There are almost no clear observations of gravity waves that coincide with observations of low-frequency signals of the Earth's free oscillation frequency band within 1 h.This paper investigates atmospheric gravity wave signals within 1 h of surface-atmosphere observations using the periodogram method based on seismometer and microbarometer observations from the global seismic network before and after the July 29,2021 Mw8.2 Alaska earthquake in the United States.The numerical results show that the atmospheric gravity wave signals with frequencies similar to those of the Earth's free oscillations 0S2 and 0T2 can be detected in the microbarometer observations.The results confirm the existence of atmospheric gravity waves,indicating that the atmosphere and the solid Earth are not decoupled within this frequency band and that seismic wave energy excited by earthquakes can propagate from the interior of the Earth to the atmosphere and enhance the atmospheric gravity wave signals within 1 h.
      原文链接:
    • 国家科技期刊平台
    • NETL
    • NSTL
    • 万方数据

    Kinematic deformation and intensity assessment of the 2021 Maduo Ms7.4 earthquake in Qinghai revealed by high-frequency GNSS

    Yu LiYuebing WangLijiang ZhaoHongbo Shi...
    230-240页
    查看更多>>摘要：Rapid acquisition of the kinematic deformation field and seismic intensity distribution of large earth-quakes is crucial for postseismic emergency rescue,disaster assessment,and future seismic risk research.The advancement of GNSS observation and data processing makes it play an important role in this field,especially the high-frequency GNSS.We used the differential positioning method to calculate the 1 HZ GNSS data from 98 sites within 1000 km of the Ms7.4 Maduo earthquake epicenter.The kinematic deformation field and the distribution of the seismic intensity by using the peak ground velocity derived from displacement waveforms were obtained.The results show that:1)Horizontal coseismic response deformation levels ranging from 25 mm to 301 mm can be observed within a 1000 km radius from the epicenter.Coseismic response deformation on the east and west sides shows bilateral asymmetry,which markedly differs from the symmetry presented by surface rupture.2)The seismic intensity obtained through high-frequency GNSS and field investigations exhibits good consistency of the scope and orientation in the high seismic intensity area,although the former is generally slightly smaller than the latter.3)There may exist obstacles on the eastern side of the seismogenic fault.The Maduo earthquake induced a certain tectonic stress loading effect on the western Kunlun Pass-Jiangcuo fault(KPJF)and Maqin-Maqu segment,resulting in higher seismic risk in the future.
      原文链接:
    • 国家科技期刊平台
    • NETL
    • NSTL
    • 万方数据

    Determining the effective elastic thickness through cross-correlation between isostatic disturbances

    Nelson Ribeiro-FilhoCristiano Mendel MartinsRaissa Moraes BaldezIvaldevingles Rodrigues de Souza Júnior...
    241-251页
    查看更多>>摘要：The elastic thickness parameter was estimated using the mobile correlation technique between the observed isostatic disturbance and the gravity disturbance calculated through direct gravimetric modeling.We computed the vertical flexure value of the crust for a specific elastic thickness using a given topographic dataset.The gravity disturbance due to the topography was determined after the calculation.A grid of values for the elastic thickness parameter was generated.Then,a moving corre-lation was performed between the observed gravity data(representing actual surface data)and the calculated data from the forward modeling.The optimum elastic thickness of the particular point cor-responded to the highest correlation coefficient.The methodology was tested on synthetic data and showed that the synthetic depth closely matched the original depth,including the elastic thickness value.To validate the results,the described procedure was applied to a real dataset from the Barreirinhas Basin,situated in the northeastern region of Brazil.The results show that the obtained crustal depth is highly correlated with the depth from known models.Additionally,we noted that the elastic thickness behaves as expected,decreasing from the continent towards the ocean.Based on the results,this method has the potential to be employed as a direct estimate of crustal depth and elastic thickness for any region.
      原文链接:
    • 国家科技期刊平台
    • NETL
    • NSTL
    • 万方数据

    Impacts of artificial dams on terrestrial water storage changes and the Earth's elastic load response during 1950-2016:A case study of medium and large reservoirs in Chinese mainland

    Linsong WangMingtao ZhuYulong ZhongJianwei Sun...
    252-263页
    查看更多>>摘要：The construction of dams for intercepting and storing water has altered surface water distributions,land-sea water exchanges,and the load response of the solid Earth.The lack of accurate estimation of reservoir properties through the land surface and hydrological models can lead to water storage simulation and extraction errors.This impact is particularly evident in many artificial reservoirs in China.The study aims to comprehensively assess the spatiotemporal distribution and trends of water storage in medium and large reservoirs(MLRs)in Chinese mainland during 1950-2016,and to investigate the gravity,displacement,and strain effects induced by the reservoir mass concentration using the load elasticity theory.In addition,the impoundment contributions of MLRs to the relative sea level changes were assessed using a sea-level equation.The results show impoundment increases in the MLRs during 1950-2016,particularly in the Yangtze River(Changjiang)and southern basins,causing significant elastic load effects in the surrounding areas of the reservoirs and increasing the relative sea level in China's offshore.However,long-term groundwater estimation trends are overestimated and underestimated in the Yangtze River and southwestern basins,respectively,due to the neglect of the MLRs impacts or the uncertainty of the hydrological model's output(e.g.,soil moisture,etc.).The construction of MLRs may reduce the water mass input from land to the ocean,thus slowing global sea level rise.The results of the impact of human activities on the regional water cycle provide important references and data support for improving the integration of hydrological models,evaluating Earth's viscoelastic responses under long-term reservoir storage,enhancing in-situ and satellite geodetic measurements,and identifying the main factors driving sea level changes.
      原文链接:
    • 国家科技期刊平台
    • NETL
    • NSTL
    • 万方数据

    Representation of three-dimensional mass distribution of the Earth's interior by biorthogonal series and its use for studying internal structure of the planet

    Mykhailo FysMariana YurkivAndrii BrydunAndrii Sohor...
    264-275页
    查看更多>>摘要：This paper utilizes the mathematical concept of approximation within an ellipsoid from a single view-point to present the spatial mass distribution function of the Earth's interior and its internal potential.The primary focus lies in constructing the volume distribution of masses in the planet's interior,with the expansion coefficients being linear combinations of the Stokes constants.Several possible approaches are suggested for determining accurately these coefficients employing three-dimensional(biorthogonal)polynomials.By expressing the mass distribution function of the Earth's interior and its internal potential as a series,an algorithm is introduced for the calculation of gravitational energy.It allows us to estimate fluctuations in gravitational energy.The implementation of this algorithm offers the means of estab-lishing the extent to which the Earth deviates from a state of hydrostatic equilibrium as a celestial body.Due to the aforementioned method,calculations have been conducted to validate its effectiveness and reliability.This example is given as an illustration of a given method for studying the internal structure of planets.
      原文链接:
    • 国家科技期刊平台
    • NETL
    • NSTL
    • 万方数据

    An improved typhoon monitoring model based on precipitable water vapor and pressure

    Junyu LiHaojie LiLilong LiuJiaqing Chen...
    276-290页
    查看更多>>摘要：The potential of monitoring the movement of typhoons using the precipitable water vapor(PWV)has been confirmed.However,monitoring the movement of typhoon is focused on PWV,making it difficult to describe the movement of a typhoon in detail minutely and resulting in insufficient accuracy.Hence,based on PWV and meteorological data,we propose an improved typhoon monitoring mode.First,the European Centre for Medium-Range Weather Forecasts Reanalysis 5-derived PWV(ERA5-PWV)and the Global Navigation Satellite System-derived PWV(GNSS-PWV)were compared with the reference radiosonde PWV(RS-PWV).Then,using the PWV and atmospheric parameters derived from ERA5,we discussed the anomalous variations of PWV,pressure(P),precipitation,and wind speed during different typhoons.Finally,we compiled a list of critical factors related to typhoon movement,PWV and P.We developed an improved multi-factor typhoon monitoring mode(IMTM)with different models(i.e.,IMTM-Ⅰ and IMTM-Ⅱ)in different cases with a higher density of GNSS observation or only Numerical Weather Prediction(NWP)data.The IMTM was evaluated through the reference movement speeds of HATO and Mangkhut from the China Meteorological Observatory Typhoon Network(CMOTN).The re-sults show that the root mean square(RMS)of the IMTM-Ⅰ is 1.26 km/h based on ERA5-P and ERA5-PWV,and the absolute bias values are mostly within 2 km/h.Compared with the models considering the single factor ERA5-P/ERA5-PWV,the RMS of the IMTM-Ⅰ is improved by 26.3％and 38.5％,respectively.The IMTM-Ⅱ model manifests a residual of only 0.35 km/h.Compared with the single-factor model based on GNSS-PWV/P,the residual of the IMTM-Ⅱ model is reduced by 90.8％and 84.1％,respectively.These re-sults propose that the typhoon movement monitoring approach combining PWV and P has evident advantages over the single-factor model and is expected to supplement traditional typhoon monitoring.
      原文链接:
    • 国家科技期刊平台
    • NETL
    • NSTL
    • 万方数据

    Assessment of the performance of the TOPGNSS and ANN-MB antennas for ionospheric measurements using low-cost u-blox GNSS receivers

    Daniel OkohAderonke ObafayeOluwakemi Dare-IdowuBabatunde Rabiu...
    291-301页
    查看更多>>摘要：Low-cost GNSS receivers have recently been gaining reliability as good candidates for ionospheric studies.In line with these gains are genuine concerns about improving the performance of these re-ceivers.In this work,we present a comprehensive investigation of the performances of two antennas(the u-blox ANN-MB and the TOPGNSS TOP-106)used on a low-cost GNSS receiver known as the u-blox ZED-F9P.The two antennas were installed on two identical and co-located u-blox receivers.Data used from both receivers cover the period from January to June 2022.Results from the study indicate that the signal strengths are dominantly greater for the receiver with the TOPGNSS antenna than for the receiver with the ANN-MB antenna,implying that the TOPGNSS antenna is better than the ANN-MB antenna in terms of providing greater signal strengths.Summarily,the TOPGNSS antenna also performed better in minimizing the occurrence of cycle slips on phase TEC measurements.There are no conspicuous dif-ferences between the variances(computed as 5-min standard deviations)of phase TEC measurements for the two antennas,except for a period around May-June when the TOPGNSS gave a better perfor-mance in terms of minimizing the variances in phase TEC.Remarkably,the ANN-MB antenna gave a better performance than the TOPGNSS antenna in terms of minimizing the variances in pseudorange TEC for some satellite observations.For precise horizontal(North and East)positioning,the receiver with the TOPGNSS antenna gave better results,while the receiver with the ANN-MB antenna gave better vertical(Up)positioning.The errors for the receivers of both antennas are typically within about 5 m(the monthly mean was usually smaller than 1 m)in the horizontal direction and within about 10 m(the monthly mean was usually smaller than 4 m)in the vertical direction.
      原文链接:
    • 国家科技期刊平台
    • NETL
    • NSTL
    • 万方数据

    The GNSS PWV retrieval using non-observation meteorological parameters based on ERA5 and its relation with precipitation

    Weifeng YangZhiping ChenKaiyun LvPengfei Xia...
    302-313页
    查看更多>>摘要：The pressure and temperature significantly influence precipitable water vapor(PWV)retrieval.Global Navigation Satellite System(GNSS)PWV retrieval is limited because the GNSS stations lack meteoro-logical sensors.First,this article evaluated the accuracy of pressure and temperature in 68 radiosonde stations in China based on ERA5 Reanalysis data from 2015 to 2019 and compared them with GPT3 model.Then,the accuracy of pressure and temperature calculated by ERA5 were estimated in 5 repre-sentative IGS stations in China.And the PWV calculated by these meteorological parameters from ERA5(ERA5-PWV)were analyzed.Finally,the relation between ERA5-PWV and precipitation was deeply explored using wavelet coherence analysis in IGS stations.These results indicate that the accuracy of pressure and temperature of ERA5 is better than the GPT3 model.In radiosonde stations,the mean BIAS and MAE of pressure and temperature in ERA5 are-0.41/1.15 hpa and-0.97/2.12 K.And the mean RMSEs are 1.35 hpa and 2.87 K,which improve 74.77％and 40.58％compared with GPT3 model.The errors of pressure and temperature of ERA5 are smaller than the GPT3 model in bjfs,hksl and wuh2,and the accuracy of ERA5-PWV is improved by 18.77％compared with the GPT3 model.In addition,there is a significant positive correlation between ERA5-PWV and precipitation.And precipitation is always associated with the sharp rise of ERA5-PWV,which provides important references for rainfall prediction.
      原文链接:
    • 国家科技期刊平台
    • NETL
    • NSTL
    • 万方数据