コンピュータによる地震観測のシステム化とその変遷

Abstract

The style of seismic observation during the last two decades has drastically changed due to the revolutionary advancement of technology, especially noted in the advent of the telemetry system and computer systems. Introducing the telemetry system into seismic observation resulted in a concentration of a large amount of data, which brought the necessity to change and systematize the style of routine-base data processing. Computer-based automatic processing was a long-time hope of researchers in charge of seismic observation, and they tried to develope various kinds of effective techniques and algorithms for the processing of seismic wave signals, including the automatic reading of seismic wave parameters and the automatic hypocenter locations.Recent progress in computer technology has made it possible for these researcher's hopes to be actualized. Today, most research institutes utilize computer systems operating in realtime data processing, and offer up-to-date products. Subjects for use are not always defined within a category of usual routine-base processing, but they are expanded into a higher level of processing, such as an automatic monitoring of seismic activity, or automatic detection of precursory phenomena.