You know that Analysis based on Astronomy&Solar parameters showed about extreme low condition of a big event!!!In this mean,a big magnitude event that thus extremely interesting.And next,in this mean,a focal point for researchers; So,I mean that about a condition as recording into literature due to this characteristics.In the other hand,regional seismicity data of USGS is supplying about this extraordinary condition; Also,tectonic sub-layer of USGS is not establishing conclusion about a important linearity You are right!Similarly,quite weird a condition as geologic also understanding!!!Thus,I realised some researches...Thus,data about most concrete condition that subject among ISU publishes; And next,some geology maps about region; I evaluate based on section and maps that Idaho Batholith&Morphology of Challis Volcanics...So,this weird phenomena is understanding as effect caused of a Batholith System!!!(really extremely weird)