ARRAY RESEARCH THEORETICAL CAPABILITY OF SYSTEMS OF HORIZONTAL SEISMOMETERS FOR PREDICTING A VERTICAL COMPONENT IN AMBIENT TRAPPED-MODE NOISE

摘要

Theoretical results obtained in this study indicate that arrays of horizontal-component seismometers should prove to be useful tools for the removal of trapped-mode noise from the outputs of vertical-component instruments. A necessary condition is that the horizontals must be spatially separated from the vertical. In the case of a single-noise mode, arrays such as those studied in Section X should perform best when the array diameter is approximately one-half wavelength. Signal enhancement systems employing only vertical instruments require, in general, array diameters of at least one wavelength. Thus, Multicomponent arrays should offer meaningful advantages in terms of land and telemetry requirements.