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In the Deadly Shadow of Vesuvius
In recent years, volcanologists probing Mt. Vesuvius with
electric currents have discovered a huge rock plug jammed
into the the mountain's "conduit"-the 100-foot-wide pathway
leading from its deep magma chamber to the surface. Is this
good news or bad news for the people living in nearby
Naples, Italy?
(Check out this week's website,
In the Deadly Shadow of Vesuvius. It's packed with helpful hints.)
Good news, because the presence of a protective plug
indicates that Vesuvius is unlikely ever to erupt again.
Good news, because the presence of a plug indicates that the
once-threatening magma deep below Vesuvius has cooled and
hardened into a dormant, harmless mass.
Bad news, because the plug's presence indicates that the
next eruption is likely to be effusive-producing scorching,
deadly rivers of lavarather than a relatively harmless
pyroclastic flow.
Bad news, because the plug's presence indicates that the
next eruption is likely to be explosiveproducing a
deadly, avalanche-like pyrocastic flow of gas, rocks, and
hot ashrather than a relatively harmless effusive
eruption of hot but slow-moving lava.
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