SIMULTANEOUS INVERSION OF EARTHQUAKE HYPOCENTERS AND VELOCITY STRUCTURE(I)--THEORY AND METHOD
LIU FU-TIAN (Institute of Geophysics. Academia Sinica)
In this paper, the problem of simultaneous inversion for earthquake location and velocity structure is discussed, and the difficultes encountered in the inversion are discussed. After separating velocity parameters from hypocentre parameters, the introduction of an orthogonal projection operator has made the system of equations for hypocentre parameters consistent. Thus, it is possible to obtain a unique solution of earthquake location in the classical sense through appropriate distribution of seismograph network.With respect to numerical values, it is suggested that to adopt methods of matrix block structure and sequential orthogonal triangularization, can save computer storage. If simultaneously combined with equivalent models and the rapid procedure of ray tracing, the practicability of joint inversion can yet be improved.