检索结果-南通市图书馆

Terrestrial water storage variation in Hebei plain area of China,based on ground surface gravimetry

在线全文

学校读者我要写书评

暂无评论

Geodesy and Geodynamics 2021年第3期12卷 190-196页

作者： Hongtao Hao Hongliang Liu Xinlin Zhang Jin Wei Bin Zhao minzhang hu Key Laboratory of Earthquake Geodesy Institute of SeismologyCEAWuhan430071China Gavitation and Earth Tide National Observation and Research StationWuhan430071China hubei Earthquake Administration Wuhan430071China Mobile Survey Team of Hebei Earthquake Agency Baoding071000China

Variation of terrestrial water storage in the Hebei plain area from March 2010 to June 2014 was studied using ground gravimetry combined with vertical displacement data from the Global Navigation Satellite *** show that observed gravity variation in this area increased continuously,basically reflecting a trend toward land *** the effect of this subsidence removed,a dominantnegative change in gravity variation was evident,reflecting an average rate of decrease in terrestrial water in this area of 0.10±0.053 m/y,and this is equivalent to a volume of 81.5±43.2×108 m^(3)and is consistent with the spatial distribution of groundwater change from measured hydrologic *** results can be an essential reference and supplement for the study of terrestrial water variation in the Hebei plain area,and indicate that ground surface gravimetry can be used as an important mean for studying changes in terrestrial water.

关键词： Hebei plain area Gravity variation Terrestrial water storage variation Ground surface gravimetry Land subsidence

Temporal variation of gravity field prior to the Ludian Ms6.5 and Kangding Ms6.3 earthquakes

在线全文

学校读者我要写书评

暂无评论

Geodesy and Geodynamics 2015年第6期6卷 429-436页

作者： Hao Hongtao Wei Jin hu minzhang Liu Ziwei Li hui Key Laboratory of Earthquake Geodesy Institute of SeismologyChina Earthquake Administration Wuhan Base of Institute of Crustal Dynamics China Earthquake Administration

Using mobile gravity data from the central area of Sichuan and Yunnan Provinces, the relationship between gravity variation and earthquakes was studied based on the Ludian Ms6.5 earthquake that occurred on August 3rd, 2014, and the Kangding Ms6.3 earthquake that occurred on November 22 nd, 2014; the mechanism of gravity variation was also explored. The results are as follows：（1） Prior to both earthquakes, gravity variation exhibited similar characteristics as those observed before both the Tangshan and Wenchuan earthquakes, in which typical precursor anomalies were positive gravity variation near the epicenter and the occurrence of a high-gravity-gradient zone across the epicenter prior to the earthquake.（2） A relatively accurate prediction of the occurrence locations of the two earthquakes was made by the Gravity Network Center of China（GNCC） based on these precursor anomalies. In the gravity study report on the 2014 earthquake trends submitted at the end of 2013, the Daofu-Shimian section at the junction of the Xianshuihe and Longmenshan fault zones was noted as an earthquake-risk region with a predicted magnitude of 6.5, which covered the epicenter of the Kangding Ms6.3 earthquake. In another report on earthquake trends in southwestern China submitted in mid-2014, the Lianfeng, Zhaotong fault zone was also classified as an earthquake-risk region with a magnitude of 6.0, and the central area of this region basically overlapped with the epicenter of the Ludian Ms6.5 earthquake.（3） The gravity variation characteristics are reasonably consistent with crustal movements, and deep material migration is likely the primary cause of gravity variation.

关键词： Ludian Ms6.5 earthquake Kangding Ms6.3 earthquak Gravity variation Gradient zone Mechanism of gravity variation Crustal movement Deep material migration Sichuan-Yunnan area

Gravity variation before the Akto Ms6.7 earthquake, Xinjiang

在线全文

学校读者我要写书评

暂无评论

Geodesy and Geodynamics 2017年第2期8卷 136-140页

作者： Hongtao Hao Lelin Xing minzhang hu Yufei Han hui Li Key Laboratory of Earthquake Geodesy Institute of Seismology China Earthquake Administration Wuhan 430071 China Wuhan Base of Institute of Crustal Dynamics China Earthquake Administration Wuhan 430071 China National Earthquake Infrastructure Service Beijing 100045 China

The relationship between gravity variation and the Akto Ms6.7 earthquake on November 11, 2016, was studied by use of mobile gravity observation data from the China continental structural environmental monitoring network. The result revealed that before the Akto earthquake, a high positive gravity variation was observed in the Pamir tectonic knots region （within a maximum magnitude of approximately ＋80 microgal）, which was consistent with the existing knowledge of gravity abnormality and the locations of strong earthquakes. In view of the recent strong seismic activities in the Pamir tectonic knots region, as well as the strong upward crust movement and compressive strain, it is believed that gravity change in the Pamir tectonic knots region reflects the recent strong seismic activities and crust movement.

关键词： The continental tectonics environmental monitoring network of China Gravity variation Akto earthquake

Bathymetry predicted from vertical gravity gradient anomalies and ship soundings

在线全文

学校读者我要写书评

暂无评论

Geodesy and Geodynamics 2014年第1期5卷 41-46页

作者： hu minzhang Li Jiancheng Li hui Xin Lelin Key Laberatery of Earthquake Geadesy Institute of SeismologyChina Earthquake Administration Wuhan Base of Institute of Geodynamics China Earthquake Administration School of Geodesy and Geomatics Wuhan University

In this paper, the admittance function between seafloor undulations and vertical gravity gradient anomalies was derived. Based on this admittance function, the bathymetry model of 1 minute resolution was predicted from vertical gravity gradient anomalies and ship soundings in the experimental area from the northwest Pacific. The accuracy of the model is evaluated using ship soundings and existing models, including ETOPO1, GEBCO, DTU10 and V15.1 from SIO. The model＇s STD is 69. 481m, comparable with V15.1 which is generally believed to have the highest accuracy.

关键词： bathymetry vertical gravity gradient admittance function ship soundings isostasy

长距离输气(油)管道沿线地质灾害监测技术研究

在线全文

学校读者我要写书评

暂无评论

大地测量与地球动力学 2011年第B6期31卷 114-117页

作者：陈珍胡敏章江西工业工程职业技术学院萍乡337055 武汉大学测绘学院武汉430079

研究采用GPS技术进行长距离输气(油)管道沿线地质灾害监测的理论和方法,主要分析滑坡体表面的形变,同时结合雨量监测和裂缝监测分析滑坡体的形变。研究表明:GPS技术可以有效地对地质情况复杂区域的地质灾害体进行监测,分析其滑移状态,... 详细信息

研究采用GPS技术进行长距离输气(油)管道沿线地质灾害监测的理论和方法,主要分析滑坡体表面的形变,同时结合雨量监测和裂缝监测分析滑坡体的形变。研究表明:GPS技术可以有效地对地质情况复杂区域的地质灾害体进行监测,分析其滑移状态,为工程的灾前治理提供科学依据。

关键词：油气管道地质灾害 GPS 滑坡监测灾前治理

Research Progress in Surface and Marine Gravimetry

在线全文

学校读者我要写书评

暂无评论

Journal of Geodesy and Geoinformation Science 2023年第3期6卷 19-32页

作者： Heping SUN Lifeng BAO Shi CHEN Xiaoming CUI Qianqian LI Lulu JIA Jianqiao XU Jiangcun ZHOU minzhang hu Yiqing Zhu Xiaodong CHEN Lin WU Jiancheng HAN Honglei LI Miaomiao ZHANG Linhai WANG Innovation Academy for Precision Measurement Science and Technology Chinese Academy of SciencesWuhan 430077China State Key Laboratory of Geodesy and Earth’s Dynamics Innovation Academy for Precision MeasurementUniversity of Chinese Academy of Sci-encesBeijing 100049China Institute of Geophysics China Earthquake AdministrationBeijing 100081China Beijing Baijiatuan Earth Sciences National Observation and Research Station Beijing 100095China Institute of Seismology China Earth-quake AdministrationWuhan 430071China Second Monitoring Center China Earthquake AdministrationXi’an 710054China

Gravity field is the most basic physical field generated by the material properties of the Earth *** reflects the spatial distribution,movement and change of materials determined by the interaction and dynamic process inside the *** the years,a variety of technical means have been used to detect the Earth’s gravity field and supported numerous studies on the global change,resource detection,geological structure movement,water resources change and other related fields of *** is part of the progress in surface and marine gravimetry obtained by Chinese geodesy scientists from 2019 to 2023 from the following aspects,including:①Continuous gravity network in Chinese mainland;②Application of superconducting gravity measurement;③Network adjustment for continental-scale gravity survey campaign and data quality control;④Regional time-variable gravity field and its application;⑤Research progress on novel technologies for gravity inversion;⑥Research progress on marine gravity field determination;⑦Application research on marine gravity field.

关键词： surface and marine gravimetry time-variable gravity field geodynamics gravity inversion

在线全文

学校读者我要写书评

暂无评论

水文气象因素对中国北疆流动重力变化的影响

武汉大学学报（信息科学版） 2022年第1期47卷 85-92页

作者：黄亚朋胡敏章郝洪涛中国地震局地震研究所(地震大地测量重点实验室) 湖北武汉430071 中国地震局地壳应力所武汉创新基地湖北武汉430071

水文气象因素引起的重力变化是影响地震重力变化成果解释的重要因素。以中国北疆地区为研究区域,借助全球陆地数据同化系统(global land data assimilation systems,GLDAS)全球水文模型数据、大气模型数据,计算2016-01—2017-12时段内... 详细信息

水文气象因素引起的重力变化是影响地震重力变化成果解释的重要因素。以中国北疆地区为研究区域,借助全球陆地数据同化系统(global land data assimilation systems,GLDAS)全球水文模型数据、大气模型数据,计算2016-01—2017-12时段内水文气象因素对研究区域的重力影响。计算结果表明,陆地水影响的年变化为1.3μGal,两期陆地水影响空间分布的差异低于1μGal;大气影响的年变化为8μGal,两期大气影响空间分布的差异达到6μGal。利用2016-04、2016-08和2017-06三期流动重力测量数据,对比扣除水文气象因素前后的重力变化,可以看出,在中国北疆流动重力数据处理中,大尺度水文因素可以不予考虑,气象因素应予考虑。同时,为更好分析流动重力变化,建议流动重力测量过程中同时开展测点附近的土壤湿度、大气气压等观测。

关键词：流动重力全球水文模型全球陆地数据同化系统大气模型重力变化

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

由垂直重力梯度异常反演全球海底地形模型

测绘学报 2014年第6期43卷 558-565,574页

作者：胡敏章李建成邢乐林中国地震局地震研究所地震大地测量重点实验室湖北武汉430071 武汉大学测绘学院湖北武汉430079

给出海底地形起伏与垂直重力梯度异常之间的响应函数关系。据此,联合船测海深和垂直重力梯度异常数据,构建了全球75°S—70°N范围内1′×1′海底地形模型。以船测海深为检核参考,考察了本文模型在印度洋南部和西北太平洋地区的精度。... 详细信息

给出海底地形起伏与垂直重力梯度异常之间的响应函数关系。据此,联合船测海深和垂直重力梯度异常数据,构建了全球75°S—70°N范围内1′×1′海底地形模型。以船测海深为检核参考,考察了本文模型在印度洋南部和西北太平洋地区的精度。结果表明,在考察区域内,本文模型精度优于ETOPO1、GEBCO和DTU10模型,且在印度洋南部与SIO的最新海底地形模型V15.1精度相当,在西北太平洋地区略优于V15.1。探讨了高次项和地壳均衡现象的影响量级,发现两者对反演结果的影响很小,可以忽略。通过与重力异常反演结果的比较,发现垂直梯度异常反演在中短波长部分(100~200km)表现较优。在西北太平洋地区,联合重力异常和垂直梯度数据进行海底地形反演计算,反演结果的精度较V15.1模型提高了约29.5%,说明联合这两种数据可以计算精度更高的海底地形模型。

关键词：垂直重力梯度异常重力异常海底地形地壳均衡响应函数

福建省重力台网对米娜台风激发的微震信号源定位

在线全文

学校读者我要写书评

暂无评论

武汉大学学报（信息科学版） 2022年第6期47卷 955-963页

作者：韦进胡敏章韩宇飞鲁小飞江颖中国地震局地震研究所湖北武汉430071 武汉引力与固体潮国家野外科学观测研究站湖北武汉430071 湖北省地震局湖北武汉430071 中国地震台网中心北京100045

利用重力台网进行台风激发信号的源区定位研究不仅有助于提高台风监测能力,而且可从台风激发信号中区分出震前与震源有关的信号,促进地震预测研究。以2019年第18号台风米娜(MITAG)为研究对象,基于福建省重力台网观测的1 Hz采样的固体潮... 详细信息

利用重力台网进行台风激发信号的源区定位研究不仅有助于提高台风监测能力,而且可从台风激发信号中区分出震前与震源有关的信号,促进地震预测研究。以2019年第18号台风米娜(MITAG)为研究对象,基于福建省重力台网观测的1 Hz采样的固体潮观测数据,利用噪声互相关函数的信噪比(signal-to-noise ratio,SNR)和归一化噪声能量流方法分析数据质量和微震源区方位,使用SNR≥25的Rayleigh波互相关信号走时作为定位数据,进行台风4个时段的定位研究。结果表明,在MITAG台风靠近中国大陆的过程中,定位区域能够覆盖台风中心所在位置;地震背景噪声能量辐射模型的微震垂直位移极值区域也和台风靠近中国大陆过程时段一致;通过人工剔除高速波群的互相关信号后,定位区域也能覆盖到转向远离大陆过程时段的台风轨迹。福建省重力台网对台风的追踪提供一类新的数据和方法。

关键词：重力台网微震信号互相关函数定位