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简要介绍陕西省地震编目工作的发展历史,并通过地震编目分析1970年以来陕西省地震的分布情况.结果显示,省内地震主要分布在陕西关中及陕南地区;随着煤矿的开采,近几年陕北地区矿震数量呈现增加陕西态势. 相似文献
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安徽地震编目自2009年数字化以来,编目方式发生变化,本文从地震初动标注、震相分析、振幅量取等阐述安徽数字地震编目工作进展,同时提出进一步提高数字化地震编目精度的方法,规范编目检查流程,减少人工误差。 相似文献
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开发了福建数字地震台网的一个地震编目系统,该系统具有如下功能直接使用人机交互分析处理系统输出的地震定位结果文件,对地震目录和观测报告数据库进行自动更新;多种格式地震目录和观测报告文件的输出;在矢量地图上进行点查询与区域查询等。本文就该系统的概况、特点及开发技术予以介绍。 相似文献
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张萍 《地震地磁观测与研究》1999,20(6):95-97
地震目录和地震观测报告是进行地震预报和研究不可缺少的基础资料.目录的完整与准确程度,对研究成果将会产生直接的影响.因此,不仅需要编目人员有强烈的责任心,一丝不苟地工作,还需要有较高的业务能力和良好的素质,才能使编目水平不断提高. 相似文献
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青海省前兆台网承担本省前兆观测数据的汇集、处理、存储与报送任务。通过35年来的不断建设与完善,使得前兆项目密度增加,观测综合化水平得到大幅度提升,有效地提高了本省整体地震监测能力,在地震监测预报中发挥着重要作用。 相似文献
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通过回忆共和地震前出现的反常现象,认为地震发生前有预兆,并通过这些预兆使人们提高警惕,做好地震预报、地震应急的准备工作。 相似文献
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依据“全球大地震目录”对1651次大地震的发震时间,按月日统计出发震“月日谱”,将揭示出的“多发震日”现象,以多发震日易发震的认识,试图用于发震时间的定量预测;对全球大地震依据地理座标,选取最佳经纬限度,提出“经纬网格”地震区域分区法的构想,用以统览全球地震的空间分布状态和编制以空间为序列的地震目录。 相似文献
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文中分析了云南省M≥5.5强震活动的时空结构,发现7级以上大地震不仅在空间上有序,而且在“时间”上以其历经的强震数目为序按律发生,显示出构造地震活动作为一种开放系统,其行为具有自律性。利用自律结构的稳定性及其在不同区域演进阶段的差异,探讨了在实际预报中应用的可行性。 相似文献
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Study of historical earthquake is one of the important methods to understand the seismic activities and analyze the seismogenic faults. On the May 25th, 1568 AD, a destructive earthquake occurred to the northeast of the present-day city of Xi'an, Shaanxi Province. Because this earthquake happened shortly after the 1556 M8 earthquake and was regarded as an aftershock, it has received little attention in previous studies. Previous earthquake catalogue agreed in assigning a magnitude 6 3/4 to this earthquake but had different epicentral locations and seismic intensity, and the seismogenic structure remains ambiguous.
Based on textual research of historical earthquake and field investigation, the Jingyang County, Gaoling County, and Xianning County, were the worst hit area by the earthquake, and the areas, including Yongle Town, Gaozhuang Town at southeastern Jingyang County to Gaoling County and its southeastern present-day Jijia and Zhangbu, should be the mesoseismal area of this earthquake. The epicenter intensity of this earthquake is Ⅸ+(9~10 degrees), and the magnitude is estimated to be 7. The isoseismal lines were drawn to exhibit the various intensities of the areas damaged during the event, with its major axis directed NWW. Intensities reached Ⅸ+ in the zone extending west-northwest parallel to the Weinan-Jingyang Fault. This fault, characterized by a normal fault that developed during the Cenozoic extensional history of the Weihe Basin, dipping to the north at an angle of 60°~80°, is one part of the southern boundary faults in Weihe graben. There are geomorphological and geological evidences of recent activity of the fault during (180±30)a BP to (1 600±30)a BP. At T1-T2 fluvial terraces on the north bank of Weihe River, the scarps were faulted during Ming Dynasty, and sandy soil liquefaction, dense structural tensional fissures and faulted strata are noted in stratigraphic profiles and trenches. Thus, we suggest that this fault can reliably be regarded as being active during Holocene, and re-name the earthquake as the Shaanxi Gaoling earthquake. 相似文献