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Fig. 3 | Earth, Planets and Space

Fig. 3

From: Detection of deep low-frequency earthquakes in the Nankai subduction zone over 11 years using a matched filter technique

Fig. 3

An example of slow long-distance migration of LFEs during an ETS episode. a Space–time diagram of detected LFEs as a function of distance along fault strike (blue circles). Dashed red curves show diffusional fronts assuming the diffusion coefficients shown in the figure. The gray dotted-line rectangle represents the box of b. b Time series of the cumulative number of LFEs within the gray dotted-line box in a (−220 < Y < − 205). The vertical dashed line coincides with the timing at which the migrating front of LFEs passes. “R” indicates the LFE occurrence rate before the migration front passes. c A zoomed-in view of the gray dotted-line box in a

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