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Earth, Planets and Space
Fig. 1 | Earth, Planets and Space

Fig. 1

From: Development of a modified envelope correlation method based on maximum-likelihood method and application to detecting and locating deep tectonic tremors in western Japan

Fig. 1

Schematic diagram of our location method. The observed envelopes at many stations are shown by the red curves in the upper boxes. The light blue curves in the upper boxes are the time-shifted template waveform, which is also shown as the black curve in the lower box. Our method searches for the source location that will maximize ACC, which is the weighted sum of the cross-correlations. The weight is determined based on the similarity between the observed and template waveforms. In this case, the weight of station i is smaller than those at stations 1–3, as the difference between the observed and template waveforms is large

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