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In 1585, a Ms53/4 earthquake occurred in the south of Chaoxian county, Anhui Province. The parameters of this earthquake were reported differently in various versions of earthquake catalogues.
According to detailed textual research on the historic records of this earthquake, the epicenter location of the earthquake was further confirmed by means of seismo-geological field investigations in the Chaohu-Tongling region along the western Yangtze River valleys. Shallow seismic prospecting and drilling methods were applied in studying the buried fault. The possibility of the existence of seismogenic faults and fault activity in the western Yangtze River area were analyzed in depth, and the causative tectonic background of the 1585 Ms53/4 south Chaoxian earthquake was studied. The results of this study indicate that the Yanjiaqiao-Fengshahu fault, which was active in the early to mid-Pleistocene, is possibly the causative structure of this earthquake.To identifying the seismogenic structure of the 1585 south Chaoxian earthquake will help gain more knowledge about the tectonic background of moderate and small earthquake activity in Eastern China. 相似文献
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本文介绍南极海冰数据库，包括资料来源和性质，资料处理方法如ＳＩＧＲＩＤ资料的解码和压缩，存贮数据的生成，如净冰面积指数（１０°×１０°冈格）．密集度（０．２５纬距网格）．图形模块和海冰外缘线；数据库资料的分析应用软件系统，以统计计算方法为主．统计模拟为杨，它包含了大量的成熟的统计方法，如谱分析，回归，时间序列，主成分分析等方法；数据库的输出方式：显示器、激光打印机和平板绘图仪作为图形输出设备．以磁盘作为数字输出设备。数据库和相应的外部设备驱动程序支持下，可以很方便地生成图形和硬拷贝。开发便于在计算机存贮和处理的ＬＩＳＴ格式转换海冰原始ＳＩＧＲＩＤ格式资料。两者比较显示出ＬＩＳＴ格式节省１０倍的空间和时间。建立了南极海冰密集度分布图库，并以伪彩色动画显示，以位图作映射存贮方式节约空间，动画连续显示海冰分布形式逼真，便于直观应用和查找。利用网格球面积×网格冰密集度的方法计算净冰面积指数，可方便的给出任何区域的净冰面积而且能准确地反应实际情况，比原来国际上所使用的冰范围面积其结果要大大提高精度。 相似文献
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全球地面降水月值历史数据集研制 总被引：2，自引：0，他引：2
全球降水历史数据是开展气候、水循环等研究的基础。收集整理全球12个数据源降水历史月值资料,通过站号、站名甄别不同数据源中相同台站,对344个通过相关系数、一致率、均值t检验、方差F检验的台站多源资料进行拼接,尽可能多地融合各套数据产品优势,最终形成全球降水历史月值数据集(CMA Global PrecipitationV1.0, CGP)。数据集重点解决当前国际数据产品在东亚地区站点稀少、同时应用多套数据应用门槛较高等问题。数据集收录3.1万个台站共计1.87×107组月降水记录, 4152个台站序列长度达百年。与美国大气海洋局(NOAA)的全球降水数据集(GHCN-M V2.0)对比,CGP新增1万个站点、0.5×107组有效观测记录和1030条百年序列,其中141条百年序列通过多源整合技术获取。CGP的站点和数据量优势主要体现在东亚、东欧、西伯利亚等站点稀疏地区。基于CGP分析的全球降水时空特征与国际同类产品的结果较一致。新增的数据虽然没有改变全球降水分布的总体特征,但对区域性的百年降水变化检测有一定影响。基于CGP的全球降水百年序列结果显示,20世纪前半叶全球降水量偏小,近20年是1900年以来全球降水量最大的时期,各纬度带、各个国家或地区的降水长期变化趋势呈现显著的差异。 相似文献
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中国地震历史资料的信息开发与利用 总被引：7，自引：1，他引：7
本文对全国历史地震资料的有用信息作了进一步的开发和利用，按统一方法处理了大量有感以上地震的文字记载，确字每个独立地震的时间与地点；分区求得地震的有感区长半径与震级的关系式；确定了历史有感地震的最低震级为４；取得了８０００余次有感地震垢基本参数；用等震线测定了巨大地震的参数；将有感强震目录统编成全国与几个大区Ｍ≥４．０地震目录，按《地震学地震预报实用程序系统》（ＥＰＳＥＩＳ）的格式要求建库；同时编制 相似文献
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河曲自动站草温异常问题的解决方法 总被引：1，自引：0，他引：1
山西省河曲县气象局于2002年12月建成自动站，当时是7要素自动站。在测报人员的认真监控和管理下运行状况一直保持良好，观测人员也积累了一些自动站维护方面的知识。2006年5月又增加了草温观测项目，开始草温的试观测。草温项目以前没有人工观测，没有历史数据，因此草温的正常与否不是马上可以判断。从观测开始，草温和地面温度相比较差值较大，有时能差十几度，甚至20多度，笔者于是又问了一下邻近台站，对比了双方的资料，确定了河曲县的草温异常，我们尝试着做了一些排除异常工作。 相似文献
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According to a new investigation in the northern Hexi corridor,the remains of two surface rupture zones were discovered on the southern margin fault of the Helishan. One rupture has a length of approximately 7km and the other 10km. The two surface rupture zones might have been produced by the latest earthquake event. On the surface rupture is continuous scarp and free face caused by the rupture. The scarp is about 1 ～ 1. 5m high and on some sites,nearly up to 2m. According to the OSL results,the latest T1 terrace and higher flood plain forming in 3000a B. P. are dislocated by the fault. The above reveals the rupture age to be later than the T1 terrace. However,in the historical data and earthquake catalogue,we didn't find related information about the fault and surface rupture in this area. The 180 A. D. Biaoshi M8. 0 earthquake and the 756 A. D. Zhangye-Jiuquan M7. 0 earthquake are documented in historical data. It is inferred by textual research that the two earthquakes are related to the northern marginal fault of Yumushan in the south of the basin. Due to a lack of reliable evidence,there are still many arguments on this inferred conclusion. Thus we hold that the two surface rupture zones were produced by one of the two large earthquakes or other unrecorded historical event. The research on the activity and surface rupture of this fault can offer valuable information for the tectonic study and strong earthquake risk estimates of this region in the future. 相似文献
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Historical data regarding Zhang Heng＇s seismoscope is not singular proof. Actually, the four earliest historical documents, i. e. , Continuation of Historiography of Han Dynasty, Historiography of the Later Han, Book of the Later Han and Ding Record all have relevant records of its structure, size, principle, response to earthquake and actual applications. These five aspects are supported by archaeological research, unearthed cultural relics, historical earthquakes and modern seismological study. These historical materials contain a great deal of specific information about this ancient seismoscope. In conclusion, the authenticity and reliability of Zhang Heng＇s seismoscope are verified. 相似文献
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