Electronic Supplement to
Assessment of Infrasound Detectors Based on Analyst Review, Environmental Effects, and Detection Characteristics

by Junghyun Park, Chris T. Hayward, Cleat P. Zeiler, Stephen J. Arrowsmith, and Brian W. Stump

This electronic supplement includes two figures to better understand the detection performances of the two detectors (progressive multichannel correlation [PMCC] and adaptive F-detector [AFD]) used in the main article. Figure S1 shows the detection outputs from PMCC with different subnetwork use; all array elements together (single subnetwork of 00/10/20/30) and multiple subnetworks (00/10/20+00/10/30+00/20/30+10/20/30). Figure S2 (shown in Fig. 8 in the main article; gray version) documents the detection results (correlation, azimuth, and phase velocity) for two detectors. Detailed polar plots in terms of threshold values and array configurations with different colors and symbols are shown in Figure S2.


Figures

Figure S1. Summary of detection results (number of sensors, consistency, correlation, amplitude, azimuth, and phase velocity) from PMCC with a consistency threshold of 0.1 s using (a) large aperture arrays with all array elements and a single subnetwork (00/10/20/30) and (b) all array elements and multiple subnetworks (00/10/20+00/10/30+00/20/30+10/20/30). (c) The filtered waveform recorded at CHN00 is displayed.

Figure S2. Polar plots of (a) correlation estimates and (b) phase velocity (m/s) with respect to azimuth based on analyst review (color coded by analysts in the left for panel b) and the automatic detectors for (top) the first 2-hr data and (bottom) the last 2-hr data. Threshold values were color coded (p-value: 0.001 [black], 0.005 [pink], 0.01 [red], 0.03 [yellow], 0.05 [green], 0.07 [sky-blue], and 0.09 [blue]; and consistency value: 0.01 s [black], 0.05 s [pink], 0.1 s [red], 0.3 s [yellow], 0.5 s [green], 0.7 s [sky-blue], and 0.9 s [blue]). Different symbols are used to quantify the effect of the different array configurations (small aperture arrays, dots; large aperture arrays, circles; small and large aperture arrays, diamonds; all arrays, stars).

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