The Study On The Generation Of Earthquake Skakemap

When an earthquake occurred,in order to implement timely and effectively emergency rescue and repairing work,we must first understand the extent and scope of the earthquake hazard. With the existing seismic monitoring network, it is not a problem that we confirm the earthquake magnitude and epicenter location in a short time.However,the damage pattern is not a simple function of these two parameters alone,and more detailed information is necessary to properly evaluate the situation. Currently, Many foreign countries and regions have established a ground motion intensity quick report system .After the earthquake within few minutes, these system can quickly determines the groudmotion distribution caused by the earthquake(also called shakemaps). This article focuses on the United States Shakemap's basic principles,and preliminarily study its application in our country.First, This article reviews the Shakemap of research, development and application, and introduces shakemap Research and application in china, analyzes the feasibility of applicating Shakemap in our local area.Second, This article analysis the basic principles and the processes of Shakemap in detail, and attenuation relationship,site conditions,the ground motion parameter's estimation in non station areas and intensity calculation method involved in the process of selection is discussed.Third, the research select the strong motion data that getting from Wenchuan earthquake.I applicate the basic method of Shakemap,and get the t earthquake acceleration contour maps and intensity distribution, and compare the results with other academic research results.At the same time,I compute station intensity with kinds of methods using station records in WenChuan earthquake,and then compare the difference among these methods,and get which method we should use in our shakemap system.Finally, This article applicate the H / V spectral ratio method, using the strong motion data getting from WenChuan earthquake in the region of Sichuan,and then get coefficient of Sichuan site effect contour map and the predominant frequency of site contour maps.