Extended Array Evaluation Program. Special Report No. 5. Selection of Reference Waveforms for Matched Filter Processing of Long Period Signals from Seismic Events,

摘要

In an attempt to find optimum reference waveforms for matched filtering long period signals,several reference waveforms varying in duration and signal contents were taken from Alaskan Long Period Array recordings of major events in the Sinkiang Province area. Each of these reference waveforms was used as a matched filter in processing a number of other events in the same area. The events differ in magnitude,location and depth. Analysis of the signal-to-noise ratio gains (relative to bandpass filtering) showed that optimum processing of all events required a large number of reference waveforms. This processing yielded up to 8dB improvement over to-date routine matched filter processing of Central Asia events. Several other aspects of reference waveform matched filtering also are discussed. (Author)