共查询到18条相似文献,搜索用时 140 毫秒
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基于震源机制解的断层三维动画自动生成系统以地震应急实际需求为导向,根据震源机制解提供的断层走向、倾角和滑动角,通过对断层模型进行三维建模,建立断层控制点的运动方程,利用动画自动生成技术,生成发震断层的三维演示动画。利用该系统制作了九寨沟7.0级、精河6.6级地震的三维运动动画。该系统自动产出的断层三维动画,可在地震应急期间为抗震救灾指挥部展示直观的断层运动过程,并且结合余震分布等信息可为震后趋势的判定提供科学依据,同时,可借助微博、微信等新媒体为社会公众提供更好的服务。 相似文献
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宁夏地震应急指挥管理信息系统建设 总被引:1,自引:1,他引:0
李自芮 《地震地磁观测与研究》2012,33(5):310-315
综合介绍宁夏地震应急指挥技术系统建设情况、系统结构及其功能、建设中存在的问题和建议,以及今后进一步的设想,为完善宁夏地震应急指挥信息管理系统建设提供参考。 相似文献
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通过分析陕西省现有强震动台网在汶川8.0级地震中所起到的作用和存在的不足,以及对照国外地震烈度速报建设经验,研究陕西省地震烈度速报系统建设的关键问题,从台网密度、通讯传输、建设成本三个方面提出合理建议。 相似文献
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近年来,GNSS观测技术在天津地区获得了迅速发展.截止目前,天津已建成由11个连续GNSS观测站组成的地壳运动观测网,并获得超过2年的连续GNSS观测资料.本文详细阐述了以GNSS观测技术为主要观测手段的天津市地壳运动观测网络的组网过程和布网原则,并对其数据处理结果进行了初步分析.结果表明,天津市地壳运动观测网能够满足mm级地壳运动监测的要求.其对日本“3.11”地震有较强反应,远场同震位移幅度达到7-9mm;同时GNSS连续站可成功观测到站点地面沉降变化趋势,最大年沉降量接近100mrn/a. 相似文献
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陕西地震监测台网震后恢复重建项目实施过程中,通过优化台网布局和增加台网密度,新建GNSS连续观测系统,提高了地震监测能力;采用的通讯网络新架构以及OSPF路由协议,不仅提升了监测网络通讯系统的可靠性,而且取得降低通讯费用的显著成效. 相似文献
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福建省地震局GNSS连续观测台网中61个基准站多为无人值守台站,将微信企业号引入台站系统运维管理,实现对台站设备运行状态检测,并实时推送检测结果,及时进行故障排查,提升GNSS台网运行率;实现每日9时对前一日观测数据的完整性统计,并群发统计结果,提醒工作人员进行补数处理;实现台站故障类型统计,为各台站整顿及改善工作提供资料。实际运行结果表明,该系统运行可靠,有效提高了GNSS连续观测台网的工作效率,保证了各基准站的实时高效运行。 相似文献
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自20世纪80年代中期以来,GNSS技术在高精度地壳运动观测与构造形变研究中取得了丰硕的成果,为大地测量、地球动力学研究和防震减灾等诸多领域的业务深化和应用拓展提供了强大的技术支撑。本文在回顾中国大陆地壳形变GNSS站网发展历程的基础上,阐述该网络产出的中国大陆长期构造运动速度场、中国大陆应变率场、位移时间序列、基线时间序列和多边形应变时间序列等几类基础产品,分析这些产品在中国大陆构造运动动态趋势和地震预测分析中的应用情况以及所面临的瓶颈问题,最后展望未来GNSS在高精度地壳运动监测应用中的发展方向。以中国大陆构造环境监测网络为基础,大力推进国内海量GNSS观测数据的共享,提升GNSS多系统融合定位精度,将产出更为精细的科学产品,更好地服务于中国大陆地壳运动和地震预测分析等研究。 相似文献
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PROGRESS IN APPLICATION OF GNSS TO DIVISION OF ACTIVE TECTONIC BLOCKS IN CONTINENTAL CHINA
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Chinese scientists proposed that large earthquakes that occurred in mainland China are controlled by the movement and deformation of active tectonic blocks. This scientific hypothesis explains zoned phenomenon of seismicity in space. The active tectonic blocks are intense active terranes formed in late Cenozoic and late Quaternary, and the tectonic activity of block boundaries is the intensest. Global Navigation Satellite System(GNSS)has advantages of high spatio-temporal resolution, broad coverage, and high accuracy, and is utilized to monitor contemporary crustal deformation. High accuracy and resolution of GNSS velocity field within mainland China and vicinities provided by previous studies clearly demonstrate that different active tectonic blocks behave as different patterns of movement and deformation, and block interaction boundaries have intense tectonic deformation. The paper firstly introduces the GPS networks operated by the Crustal Movement Observation Network of China(CMONOC)since 1999, and GNSS data processing methods, including GAMIT, BERNESE and GIPSY/OASIS, and discusses the advantages of using South China block as a regional reference frame for GNSS velocity field, then proposes three strategies of block division, F-test, quasi-accurate detection(QUAD), and clustering analysis. Furthermore, we introduce rigid and non-rigid block motions. Rigid block motion can be denoted by translation and rotation, while non-rigid block motion can be described by rigid motion and internal strain deformation. Internal strain deformation can be divided into uniform and linear strains. We also review the usage of F-test to distinguish whether the block acts as rigid deformation or not. In addition, combining with recent GNSS velocity results, we elaborate the characteristics of present movement of rigid block, such as the South China, Tarim, Ordos, Alashan, and Northeast China, and that of non-rigid block, such as the Tibetan plateau, Tian Shan, and North China plain. Especially, the Tibetan plateau and Tian Shan seem to deform continuously with significant internal deformation. In order to enrich and perfect the active tectonic block hypothesis, we should carefully design dense GNSS networks in inner blocks and block boundaries, optimize utilizing other space geodesy technologies such as InSAR, and strengthen combining study of geodesy, seismogeology and geophysics. Through systematic summary, this paper is very useful to employing GNSS to investigate characteristics of block movement and dynamics of large earthquakes happening in block interaction boundaries. 相似文献