We use P-wave and S-wave velocity structures and station corrections provided by Shibutani et al. (2005) for the relocation of the hypocenters.
We use P-wave velocity structure and station corrections provided by Sakai et al. (2008) and VP/VS = 1.73 for relocation of the hypocenters.
In this paper, we have used two stages for the hypocenter location process: (1) rough relocation of the JMA hypocenters by using a 1-D velocity model, and (2) hypocenter determination by using a 3-D structure model.
It is true that the width of the south-east dipping "cloud" of relocated hypocenters looks wider than the errors of the hypocenter determinations estimated in "Hypocenter relocation of the cluster activity".
We then investigate the migration of hypocenters in detail using the relocated hypocenters, considering the accuracy of the hypocenter locations.
Fig. 2 a Distribution of hypocenters.
Standard errors of hypocenters calculated in this study do not represent absolute errors of hypocenters.
Colors of circles signify the depth of hypocenters.
Colors of focal spheres indicate depths of hypocenters.
