搜索结果: 1-15 共查到“地震学 GPS”相关记录53条 . 查询时间(0.14 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...
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...
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...
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 ...
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...
The coseismic ground deformations of the 1997 Umbria-Marche earthquakes:a lesson for the development of new GPS networks
GPS IGM95 Umbria-Marche earthquakes
2015/9/1
After the occurrence of the two main shocks Mw=5.7 (00.33 GMT) and Mw=6.0 (09:40 GMT) on September 26, 1997, which caused severe damages and ground cracks in a wide area of the Umbria Marche region, t...
Non-permanent GPS data for regional-scale kinematics: reliable deformation rate before the 6 April, 2009, earthquake in the L'Aquila area
GPS Non-permanent station Subsampling Velocity Strain field
2015/8/28
A GPS-based geodetic study at a regional scale requires the availability of a dense network that is characterized by 10 km to 30 km spacing, typically followed in a few continuous GPS stations (CGPSs)...
Simulation of ionospheric error on GPS signals due to changes in the direction of mobile station positions in differential GPS
Ionosphere Ray-tracing dGPS Baseline
2015/8/27
Ionospheric propagation delay is one of the major sources of error in global positioning system (GPS) precision. Therefore, accurate estimation of the ionospheric delay is required to correct GPS posi...
Using publicly available GPS solutions for fast estimations of first-order source details from coseismic deformations
GPS Coseismic deformations Source inversion Maule earthquake
2015/8/27
We here explore the potential use of publicly available GPS solutions to obtain first-order constraints on a source model immediately following an earthquake, within the limits of GPS solution timelin...
GPS observations of coseismic deformation following the May 20 and 29,2012,Emilia seismic events (northern Italy):data,analysis and preliminary models
GPS Coseismic deformation Emilia sequence
2015/8/26
In May-July 2012, a seismic sequence struck a broad area of the Po Plain Region in northern Italy. The sequence included two Ml >5.5 mainshocks. The first one (Ml 5.9) occurred near the city of Finale...