Seismic exploration of the lunar interior by using the penetrators

Abstract

We have analyzed moonquake events detected by Apollo seismometers at each Apollo station and derived S/N of their events for our penetrator seismometer. From these analyses, it has been found that moonquake events had particular spectrum for each station. It means that the S/N of moonquake events is affected mainly by the observation site. It is supposed to be caused from the differences of the local structure on the lunar surface. In this presentation, we discuss the relation between the observed signal by the penetrator seismometer and the local structure of the observation site.