Spatiotemporal Relationship between Geodetic and Seismic Quantities: A Possible Clue to Preparatory Processes of M ≥ 6.0 Inland Earthquakes in Japan
Figure 4
Temporal variation in no. PTN1, no. PTN2, and no. PTN3 (ref. Figure 3). Black arrows correspond to the occurrence date of M ≥ 6.0 inland mainshocks. Also shown are the error bars which were obtained by 100 times of shuffling of no. PTN1, no. PTN2, and no. PTN3 in time, respectively. The horizontal axis denotes the time corresponding to the end of the time period referred to for calculation of linear trend of R(t). The beginning of each time period is fixed to April 1, 1998. Panels (a) to (d) correspond to different four pairs of geodetic and seismic quantities, which are the same as those in Figure 3.
