Soviet Seismographic Stations and Seismic Instruments. Part II.

摘要

This report deals mainly with seismic instruments and components developed since 1960. It covers short-period and intermediate-band seismographs and includes detailed descriptions of seismometers, galvanometers, amplifiers, recording systems, and the best known seismograph systems formed by combining these components; long-period instruments; special seismograph station networks; short-to-intermediate period and long-period, multiple band-pass, spectral analyzing seismographs consisting of a seismometer, a variable-gain, broadband amplifier, band-pass channel filters, and a light-beam oscillograph; strain-meters; and time-service equipment, magnetic drum recorders, and analog-to-digital converters.