Fig. 5From: Detection of low-frequency earthquakes by the matched filter technique using the product of mutual information and correlation coefficient1.25-Hz sine wave used as noise combined with template waveforms at SN ratios of (a) 1.0, (b) 2.0, and (c) 3.0. The values of MI, CC, and MICC are calculated at each time. Red dots show the index corresponding to the template signalBack to article page