Geometric explanation about continuous activity causes of Sakurashima and Satsunan Isls Group

 

You know dense activity characteristics of especially Sakurashima volcanic province.Similarly,condition of volcanic islands as Suwanoseshima on Satsunan Isls Group is selective by observers.Established a explanation considered geometric relations about mechamisms of volcanism regions summaried during last analysis.Shortly,citing role of a shallow radiative effect as Benham Rise-sourced(Note.Yellow pin is expressing actual a earthquake event on big corelation tectonic contact region of Celebes Sea); 

As maybe more interesting,I sign other part of geometric relation.Where,two instersection points of line are among provinces interesting of shallow radiative effect;