The Seismic Refraction Survey in Landslide Areas

Abstract

Some topics of seismic refraction survey in landslides such as an interpretation procedure for a Mirage layer; fan shooting for detecting faults in the bed rock by a short spread of transducers; a wave-front method for interpreting well-to-surface data are herein described referring to case histories of surveys in landslides in Shikoku and Niigata. Some results by the seismic method are compared with those by other ones such as electrical-resistivity method, γ-ray measurement, boring-log evaluation, water-table observation by means of boreholes, etc. A synthetic application of a series of geophysical methods is recommended in view of experience in these landslides.