5 typical areas in Chinese mainland are selected on the basis of the hypothesis on active tectonic block, and small earthquakes from 1970 are imported to calculate the annual strain-accumulating rates considering the completeness of historical seismic data.
To obtain every spacial diffusion parameter of earthquake damage elements, an information system of historical seismic disasters (2300 B. C. to A. D. 1980) has been set up.
Seismic danger zones on the continent of China are distinguished by taking the main indices of hydrogeochemical fields of hot groundwater and mineral groundwater,tectonic framework and tectonic activities and regularity of historical seismic activities as the main criteria for the division,combined with distributions of geophysical fields,ground temperature fields and grouping of regional strata.
The prediction is made using the following 2 methods: the deterministic statistical analysis of the historical seismic data and the computation by means of the inhomogeneous Markov model.
By means of analyzing the historical seismic data,using the involved seismic intensity data and intensity decay rule as well as considering the influence of Taiwan earthquakes,we checked 11 earthquakes which the parameters had been changed.
The development of the seismic database of China and its adjacent areas is introduced in the first part of this paper. Based on the combination of the difference between western and eastern parts of China on plate tectonics, stress state and structure of crust-mantle, the authors analyze the spatial pattern of strong earthquakes from aspects of the whole dataset, historical seismic records, instrumental records and hypocenter depth.
The paper collected a lot of engineering geological reconnaissance data in Jingjiang city and aim to the engineering geological conditions of sites in Jingjian region as well as the affect of seismogeological background and historical seismic disasters,according to the methods of corresponding criterion and geological analogy,through judging to seismic san soil liquefaction,soft siol seismic sink,seismic side slop and seismic fault damage effect combining with the distribution of stratum,landform and geomorphy,we carried out regionalization of seismic disaster effect.
It is the first recorded M=8 earthquake since the Chinese historical seismic records had started and is a great earthquake occurring in the active intracontinental basin.
This paper deals mainly with the geotectonic background of the seismicity in the Tancheng-Lujiang fault zone, with emphasis on the relationship of Late Quaternary active faults in southern part of its middle segment to the earthquakes. The seismicity is clearly different in various segments, this is well correlated to the difference of geotectonic units with various characteristics and faulting activities in the Late Quaternary.The evidences on the intermittent motion (stick-slip motion) of the ...
This article is a joint work by a seismo-geologist, a historian and an archaeologist. The authors adopt a multidisciplinary method, based on analysis of geological structure setting in late geological time, historical seismic activity law and the current seismicity, suggest that a possible strong earthquake might-occur in Xichang and its adiacent regions in coming 10 years and that Anninghe fault might not be the seismogenetic structure; also point attentive problem on study of historic...
The third paper concerns itself with studies of historical earthquakes of China,suggesting the practical importance of systematic arrangements and objective analysis of these long-standing and abundant historical seismic data,and depicting the achievements made in this field since the founding of the People's Republic of China and the current research work(such as “The Yearly Table of Earthquakes in China”and other materials published;and the book “A Compilation of Chinese Historical...