Java is part of a volcanic island arc, formed when one tectonic plate
subducts below another.
SASMEX's main focus is on earthquakes originating in the subduction zone off the southern coast of Mexico, where the Cocos tectonic plate
subducts below the North American Plate.
The heat can either have been
subducted below the 700m level (the bottom depth for this analysis), advected sideways (no real evidence for that though), or lost through the surface (either to the atmosphere, or directly out to space).
Not exact matches
For the most part, today's
subducting slabs can only sink so far, to about 670 kilometers
below the surface, before the mantle's makeup turns from a honey - like consistency, to that of paste — too dense for most slabs to penetrate further.
The combination of a hotter mantle and denser rocks likely caused
subducting plates to sink all the way to the bottom of the mantle, 2,800 kilometers
below the surface, forming a «graveyard» of slabs atop the Earth's core.
Subducted - A geological process in which one edge of a crustal plate is forced sideways and downward into the mantle
below another plate.
The back radiation which is entrained into the ocean bulk by wave action is minimal, because wave action
subducts water which is well
below the level back radiation can penetrate to (little more than its own wavelength).