An area where a mantle plume allows magma to burst through a tectonic plate not near a boundary is

I don't know the answer but I do know this 
A mantle plume is posited to exist where hot rock nucleates at the core-mantle boundary and rises through the Earth's mantle becoming a diapir in the Earth's crust.[3] The currently active volcanic centers are known as "hot spots". In particular, the concept that mantle plumes are fixed relative to one another, and anchored at the core-mantle boundary, was thought to provide a natural explanation for the time-progressive chains of older volcanoes seen extending out from some such hot spots, such as the Hawaiian–Emperor seamount chain.

Divide 108.2 x 10^6 into 1.5 x 10 and the result will be in au (astronomical units)