http://worldcat.org/entity/work/id/137276638

Automatic Seismic Signal Processing

We examined the feasibility of a post-detector as part of an automated seismic data processing system. The post-detector consisted of two parts. One is a three-component processor to determine the wave propagation, direction and distance of the signal. The other, a coherent beamforming process applied to a regional network of sensors to locate events within targeted seismically active areas of interest. Our results indicated that three-component processing is approximately equivalent to a medium-sized array in obtaining initial locations for automatic event association of detected signal. Significant detection gains were also observed, but not yet evaluated. Coherent beamforming of a regional network of sensors effectively detected and located small events in a targeted seismic region at teleseismic distance from the regional network. These preliminary results indicate that post-detection processing is sufficiently feasible to be tested on regional networks of three-component data, ideally situated at regional or teleseismic distance from targeted areas of interest. (Author).

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