搜索结果: 1-15 共查到“固体地球物理学 Gps”相关记录117条 . 查询时间(0.187 秒)
2014年鲁甸6.5级地震GPS同震位移及反演分析
鲁甸地震 GPS 同震位移 滑动位移分布
2018/4/9
本文综合GPS流动和连续观测结果，并利用最速下降法（SDM）反演方法，给出并分析了2014年鲁甸6.5级地震同震位移、断层面滑动位移分布特征.GPS同震位移结果表明：此次地震沿北西方向表现出左旋应变释放特征、沿北东向表现出拉张应变释放的同震特征，并且随着离开断裂带距离的增加，拉张变形衰减；受包谷垴—小河断裂控制的左旋剪切应变释放的位移在莲峰、昭通—鲁甸断裂附近较弱，说明该断裂可能没有完全切割昭通—...
2017年8月8日我国四川九寨沟发生里氏7.0级地震.本研究利用基线校正方法获得距震中100 km范围内9个强震台站同震位移，基于Sentinel-1卫星干涉SAR影像对获取了InSAR同震形变场.结合GPS形变数据，本研究进行了震源滑动模型联合反演，结果显示此次地震整体以走滑运动为主，释放地震矩约为7.60×1018N·m（~MW6.52）.通过对比模拟形变场和观测值显示，联合反演结果优于单独基...
陆地水储量的季节性变化是导致地表周期性负荷形变位移的主要因素，有效地剔除地表位移中的陆地水储量影响，是获取地壳构造垂向运动的必要过程.四川地处青藏高原东边缘，地形分区明显，境内以长江水系为主，水资源丰富，研究四川地区地表负荷形变位移，有助于分析陆地水储量的时空分布特性及地壳构造形变信息.本文利用研究区域内59个CORS站的GPS观测数据，计算了CORS站点的垂向位移，并将其与GRACE所得相应结果...
基于GPS和水准数据的2013年芦山7.0级地震震源滑动模型
芦山地震 GPS 水准 滑动模型
2018/5/17
利用GPS连续站和精密水准观测资料得到的同震形变结果作为2013年芦山7.0级地震地表3维形变场的约束，在兼顾不同断层模型方案的基础上对地震震源参数等进行了反演计算，结果表明：以盲逆断层作为反演的断层模型优于以上边界到地表的断层作为反演的断层模型的结果，矩形盲逆与铲状盲逆断层模型间的反演结果没有明显的差异，芦山地震矩的最佳反演结果为MW6.7，位错在断层面上的分布集中在30km×30km的范围内，...
利用青藏高原东北缘及周缘地区1999-2007年和2009-2014年2个时段的GPS水平运动速度场做约束，反演获取了海原-六盘山断裂带的闭锁程度和滑动速率亏损的时空分布演化。结果表明，海原断裂带以左旋走滑亏损为主，六盘山断裂北段以逆冲倾滑速率亏损为主，南段则以正向倾滑为主。其中，毛毛山断裂和老虎断裂西段在2个时段的闭锁深度都达到25km，最大左旋滑动亏损为6mm/a。老虎山东段和海原断裂（狭义）...
First GPS measurements across the Central-Western Mediterranean area
GPD Mediterranean geodynamics
2015/10/8
This paper concerns the displacement field of the central-western part of the Mediterranean basin estimated by the analysis of three repeated GPS surveys (1995, 1996 and 1997) consisting of 8 sites of...
Displacement pattern of the Sinai area: first results from GPS
Sinai Gulf of Suez Aqaba-Levant fault GPS displacements
2015/10/8
A network of 12 GPS stations, seven of them located on the Sinai peninsula, another four on the west shore of the Gulf of Suez and the last on the inner Gulf of Aqaba (ELAT, Israel) was analyzed twice...
Coseismic displacement of the 27th September 1997 Umbria - Marche (Italy) earthquakes detected by GPS: campaigns and data
Umbria-Marche earthquakes IGM95 GPS coseismic displacement
2015/9/30
On September 26,1997 two earthquakes of Mw 5.7 (00.33 GMT) and Mw 6.0 (9.40 GMT), occurred in the Umbria-Marche region (Central Apennines, Italy). The epicentres were located in an area of the Apennin...
True or false GPS-derived deformations?
Deformation analysis GPS networks igm 95 rome area
2015/9/28
In this paper we focus on the question whether GPS networks born with cartographic aims can be safely used in crustal deformation control. We carried out a test on a network of five vertices located i...
Geodetic deformations in the Central-Southern Apennines (Italy) from repeated GPS surveys
Geodesy GPS central-southern apennines strain rate seismotectonic
2015/9/28
We computed the horizontal strain rate field for a sector of tbc Central-Southern Apennines (Italy) from GPS data collected during yearly repeated campaigns performed from 1994 to 2000 on tbc GeoModAp...
Geomagnetic storms and the occurrence of phase slips in the reception of GPS signals
s phase slips geomagnetic disturbances total electron content
2015/9/25
We have investigated a dependence of the relative density of GPS phase slips on the geomagnetic disturbance level. The study is based on using Internet-available selected data from the global GPS netw...
Rupture history of the 1997 Umbria-Marche (Central Italy) main shocks from the inversion of GPS, DInSAR and near field strong motion data
slip history waveform inversion geodetic data modeling Colfiorito earthquakes kinematic source models
2015/9/15
We investigate the rupture history of the three largest magnitude earthquakes of the 1997 Umbria-Marche sequence by inverting GPS, DInSAR and near-source strong motion waveforms. We use the frequency ...
Ionospheric biases correction for coordinates derived from GPS single point positioning
GNSS Global Positioning System singlepoint positioning
2015/9/10
Most GPS users employ low cost receivers. These receivers do not allow users to record the pseudorange that
they observe, but the computed coordinates. This work presents an original and simple metho...
Geodetic deformation Across the Central Apennines from GPS Data in the time span 1999-2003
Geodetic Deformation Gps Apennines
2015/9/10
Abstract During the time span 1999-2003 was set up and repeatedly surveyed a not permanent GPS network located across one of the highest seismic areas of the central Apennines (Italy). The Central Ape...
Data analysis of Permanent GPS networks in Italy and surrounding region:application of a distributed processing approach
Crustal deformations Satellite geodesy Data processing Plate boundaries, motion, and tectonics
2015/9/8
We describe the procedures used to combine into a uniform velocity solution the observations of more than 80 continuous GPS stations operating in the central Mediterranean in the 1998-2004 time interv...