An Automated S-phase Arrival Time Picker with SNR Output

SPHASEPICKER is a powerful tool for automatically picking S-phase onsets with high precision without requiring detection interval or threshold settings. The algorithm detects S-phase onset in single-component acceleration or broadband velocity records using the histogram method. It also computes signal-to-noise ratio (SNR).

A demo file is provided in zip file to show how to run SPHASEPICKER using a sample waveform. For your intended application, filter corner frequencies may need to be updated based on the frequency content of the input record.

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For questions / suggestions / comments and bug reports: kalkan76@gmail.com