ATTENUATION RELATIONS FOR STRONG GROUND MOTION FROM INTENSITY DATA

Abstract

Study of intensities associated with moderate to Large size earthquakes have many applica.tior4s in earthquake engineering, e.g. the development Of attenuation relations for risk mapping at engineering sites. In th present irwesti gat ions. two new attenuation laws have been developed for the region shaken by great Kangra earthquake of 195 (MB.6) and Bihar Nepal earthquake of 1934 = 8.4) for estimatinue peak ground acceleration. Thethstance attenuation has been computed by revaluation Of available intensity data and converting the same to the M.M. scale. The least spur-c technique has been adopted for this purpose. The magnitude attenuation cnefficant has been computed both -from available intensity magnitude data and from the peak ground acceleration data for two recently occuring Himalayan......