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A C Language Implementation of the SRO (Murdock) Detector/Analyzer

Open-File Report 87-158

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Abstract

A signal detector and analyzer algorithm was described by Murdock and Hutt in 1983. The algorithm emulates the performance of a human interpreter of seismograms. It estimates the signal onset, the direction of onset (positive or negative), the quality of these determinations, the period and amplitude of the signal, and the background noise at the time of the signal. The algorithm has been coded in C language for implementation as a 'blackbox' for data similar to that of the China Digital Seismic Network. A driver for the algorithm is included, as are suggestions for other drivers. In all of these routines, plus several FIR filters that are included as well, floating point operations are not required. Multichannel operation is supported. Although the primary use of the code has been for in-house processing of broadband and short period data of the China Digital Seismic Network, provisions have been made to process the long period and very long period data of that system as well. The code for the in-house detector, which runs on a mini-computer, is very similar to that of the field system, which runs on a microprocessor. The code is documented.

Additional Publication Details

Publication type:
Report
Publication Subtype:
USGS Numbered Series
Title:
A C Language Implementation of the SRO (Murdock) Detector/Analyzer
Series title:
Open-File Report
Series number:
87-158
Edition:
-
Year Published:
1991
Language:
ENGLISH
Publisher:
Geological Survey (U.S.)
Contributing office(s):
Albuquerque Seismological Laboratory
Description:
viii, 130 p.