Network Capability Estimation. VELA Network Evaluation and Automatic Processing Research
TEXAS INSTRUMENTS INC DALLAS EQUIPMENT GROUP
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NETWORTH is a computer program which calculates the detection and location capability of seismic networks. A modified version of NETWORTH has been developed. This program has been used to evaluate the effect of station downtime, the signal amplitude variance, and the station detection threshold upon network detection capability. In this version all parameters may be changed separately for individual stations. The capability of using signal amplitude corrections has been added. The function of amplitude corrections is to remove possible bias in the magnitude estimate due to inhomogeneous signal attenuation. These corrections may be applied to individual stations, individual epicenters, or individual stationepicenter combinations. An option has been added to calculate the effect of station downtime upon network capability. This study indicates that, if capability loss due to detection errors can be minimized, then station detection threshold and station reliability will be the fundamental limits to network performance. A baseline network of thirteen stations has been performed. These stations are as follows Alaskan Long Period Array, ALPA Ankara, ANK Chiang Mai, CHG Korean Seismic Research Station, KSRS Large Aperture Seismic Array, LASA Mashhad, MSH Mundaring, MUN Norwegian Seismic Array, NORSAR New Delhi, NWDEL Red Knife, Ontario, RK-ON Shillong, SHL Taipei, TAP and White Horse, Yukon, WH-YK.