Moose, I don't know either.
But I think that there is a caldera further south (the Azores?) whose eventual
eruption could cause a tidal wave on the USA's east coast, somewhere.
Chris
On 9 Nov 2011, at 23:35, Moose wrote:
> I have no idea if this may be true of the Madeiras. The Hawaiian Islands were
> all formed as the plate they ride on moved
> past a hot spot in the earth below. So the volcanoes on the older islands are
> truly dead, as there in no longer any
> magma trying to press up below them. As the big island ever so slowly moves
> on, Mauna Kea and Mauna Loa will become
> inactive.
>
> But fear not, the next island is already moving toward the surface as the hot
> spot spawns a new, as yet submerged, volcano.
>
> I seem to recall that a similar process created the basin and range lands of
> Nevada.
--
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