The Research On Seismic Data Based On Spatial Analysis Method

Our country is an earthquake prone country which riches in seismic data and has a wide variety of data spceis.Spatial analysis,as the core technology of GIS,has a great advantage in the processing of spatial data.Space analysis has been widely used in many fields,but it is seldom used in earthquake field.This paper attempts to use spatial analysis to study the spatial distribution of seismic data,using the spatial analysis model to solve the earthquake related problems.However,there are still not enough space to deal with seismic data,such as the choice of spatial scale,or the traditional programming model is not enough to solve complex seismic problems.In this paper,the spatial statistical distribution of Anselin Local Moran's I algorithm is studied,and it is pointed out that there are problems exists in the spatial retrieval distance.This paper tries to use the Ripley's K function to determine the spatial distance of the algorithm.In addition to the traditional model,this paper attempts to combine the spatial model and seismic data,to establish the application model of seismic subject specific.The following work is done in this paper:1.Based on the seismic data that above Ms5 in China mainland after 1991,through the spatial distribution parameters and global Moran 's I index,study the distribution of data and the level of aggregation,used Anselin local Moran's I algorithm as a tool,the seismic data of China mainland in recent years is divided into three types,explore the cluster of types.Gathering seismic intensity distribution map in China mainland from 1991 to mainland,according to the location and shape of the intensity region choice corresponding map projection were digitized drawing comprehensive earthquake isoseismal maps.2.Divided the seismic data in the water surrounding China since 1900 into three data sets: the South China Sea,East China Sea,the Yellow Sea and the Bohai Sea,analysis the distribution of each data set and the level of aggregation for data on the magnitude of clustering and outliers;in 1900 Chinese waters surrounding more than five seismic data based on,using buffer model,through seismic intensity attenuation relationship,seismic intensity distribution map.Finally applied the superposition model,drawed the earthquake comprehensive Isoseismal map of the water surrounding China.3.Combine the space model and the influence of intensity,based on seismic data since 1900,according to the number and distribution of seismic data,choosed the Diaoyu Islands and Huangyan Island as a point target,establish historical earthquake intensity model.According to the results of the model,it is assumed that the target points in the next 50 years may be affected by the intensity of the impact.