Research on seismic intensity attenuation relationship in Henan and its adjacent areas

We collect twenty-four earthquake cases and fifty-seven isoseismal lines of Henan and its adjacent areas, then the seismic intensity attenuation relationship is established by using the elliptic intensity attenuation model and Levenberg Marquardt nonlinear fitting method. The result shows that the intensity attenuation relationship is more in line with the characteristics of earthquake disasters in Henan province.