Joint Magnitude Determination and Analysis of Variance for Explosion Magnitude Estimates

摘要

A method of relative magnitude determination using all available data for a limited source area is proposed. The attenuation factor B, event terms F(j), and station terms C(i) for the linear model X(ij) = C(i) + F(j) + H - BR(ij) are solved simultaneously by an interative least-squares procedure; here X(ij) is the logarithm of the amplitude and R(ij) is the logarithm of the distance. The method is analogous to joint epicenter determination, and so is termed 'joint magnitude determination' (JMD). The JMD method was applied to Seismic Data Laboratory (SDL) data from North American stations for Nevada Test Site explosions. (Author)