An overview on shallow strong earthquake activity and earthquake live losses of Chinese mainland in

来源 :地震学报(英文版) | 被引量 : 0次 | 上传用户:yiwei
下载到本地 , 更方便阅读
声明 : 本文档内容版权归属内容提供方 , 如果您对本文有版权争议 , 可与客服联系进行内容授权或下架
论文部分内容阅读
This paper reviews and analyses briefly the general characteristics of shallow strong earthquakes (Ms≥6.0, focal depth h≤70 km) in space, time and magnitude and earthquake fatalities of Chinese mainland in the centenary from 1901 to 2001. During the period from 1901 to 2001, there occurred about 420 strong shallow earthquakes with magnitude Ms≥6.0, 88% of them occurred in the western part of the Chinese mainland, which might be related to the strong deformation and motion of the active blocks in the western part. The average focal depth (25 km) in the western part is deeper than that (16 km) in the eastern part, which might be related to obviously thicker crust in the western part. The inhomogeneous distribution of focal depths with the depth profile is related to the variation of frictional and rheologic characteristics with depth in the crust. The shallow strong earthquake activity of Chinese mainland shows a tempo-spatial clustering process. The relation between earthquake magnitude Ms and cumulative frequency Nc is lgNc=8.64-0.99Ms. About 600 000 people died in the earthquakes of Chinese mainland from 1901 to 2001, the most serious earthquake live losses occurred in Hebei Province (250 723 people died) and Ningxia Hui Autonomous Region (246 269 died). There is no a statistically linear relationship between earthquake live losses and magnitudes. The statistical relationship between the earthquake deaths D and cumulative frequency Nc is lgNc=2.40-0.391gD, which shows a fractal distribution.
其他文献
By using solid-state nuclear detectors, the air radon concentrations at 87 underground working places were measured during spring, summer and winter, respective
Cases (n=44) with squamous cell cervical cancer (SCCA) and age-matched healthy controls (n=176) were analyzed. Significant difference due to human papillomaviru
目的 分析转HBsAg基因小鼠与正常小鼠肝细咆质膜的差异蛋白质组,为了解乙型肝炎发病机制,寻找药物作用靶标提供指导.方法 构建6月龄转HBsAg基因C57小鼠模型,检测转基因组小鼠
目的 探讨临床护理中实施优质护理服务的优缺点.方法 以2010年8月至2011年8月神经内科2000例住院患者为研究对象.将2000例住院患者按入院的先后顺序随机分为对照组和研究组各
在简要介绍钻孔资料数据库设计、数据库结构、管理模式及入库工作流程的基础上,详细阐述了钻孔资料的综合管理和数据的分析应用,主要包括钻孔数据的统计分析、信息查询和信息提
The geochemistry data show that the total organic carbon (TOC) contents are high in the surface sediments in the eastern part of the Moknine's Sebkha. Low decre
目的 探讨Ghrelin对大鼠小肠平滑肌舒缩活动的影响和机制.方法 观察不同浓度Ghrelin(0、20、40、80 μg/kg)对迷走神经切断大鼠小肠转运的影响,Ghrelin(0.01、0.1、0.5、1.0
选取连作9年的日光温室,采用田间区组设计,在上茬黄瓜拉秧后至下茬水稻种植前设置不同灌水次数:1次(T1)、3次(T2)、5次(T3)和不灌水(CK)处理,研究了在稻菜轮作模式下,水稻种植前不同灌水量
[目的]观察人参皂苷Rb1对小鼠脑组织自然衰老的作用,并探讨mTOR/p70S6K通路在其中的作用.[方法]27只C57/B6雌性小鼠购于中山大学实验动物中心,其中7只3月龄C57/B6雌性小鼠为
用二叉树表示出秦皇岛各旅游景点间的距离关系,由树根至树叶对二叉树进行遍历,求出秦皇岛旅游路线的优质解.从而为区域性旅游路线优化问题提供准确、简捷的算法.