Apparatus for Recording Rotation Component of Seismic Waves

摘要

An experimental pickup system for torsion component of seismic ground particle motion rate was constructed using mechanical systems with fly-wheel axis on ball bearings. The possibility of using two current systems was examined. The first one is DEPREZ, i.e., a system of analogue voltmeters, and the second one was obtained as the electro-mechanical component of a PC hard disc. Laboratory experiments have proven that the influence of dry friction on such seismographic systems is acceptably low. A system for recording the torsion components of seismic waves from tectonic as well as technical sources is being prepared.