California supervolcano discovered to have 240 cubic MILES of semi-molten magma stewing underneath

(Daily Mail) While the Long Valley Caldera in California may seem like a vast and lush canyon, what lurks underneath has shocked scientists.

Underneath the earth of the 20-miles-long and 11-miles-wide crater lies a whopping 240 cubic miles of semi-molten magma, a new report suggests.

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