Investigation of Microearthquakes -On the Accuracy of Hypocenter Determination -

Abstract

The accuracy of hypocenter determination of microearthquakes is the best when two parameters, crustal structure and origin time are fixed. The crustal structure can be put as an approximated one and the origin time can be determined independently. The error by setting two parameters fix is less than the error by other methods. By other methods the accuracy of focal depth does not stand for general usage in the study of microearthquakes and uniform seismicity can not be studied. Furthermore we discussed the possibility of revising the crustal structure by using microearthquakes.