Transcript
kjvKngRBZ6o • Campi Flegrei: Italy’s Underground Super Volcano | NOVA | PBS
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Language: en
Vesuvius isn't the biggest or most
powerful volcano in town on the other
side of the city scientists have seen an
alarming increase in volcanic
activity pelli a vast feral a vent of
bubbling gas and mud in recent years it
has grown larger and turned into a
destroyer a few hundred fet away expert
in volcanic risk Antonio Costa is
visiting a deserted
Building inside the walls and floors are
covered in a thick layer of solidified
ooze and the air is filled with the
acurate smell of
sulfur the volcanic vent has claimed the
entire
building this hostile takeover began
when gas from the vent punched holes
through the floor and
walls here you can even feel if you put
the hand
here ah it's terribly
hot as the gas cools it releases
dissolved
minerals these stick together to form
the thick volcanic scum which is now
consuming the entire
house so where is the volcano that is
driving all this
activity the vent is in an area called
campy
flra which is home to hundreds of
thousands of
people at first glance it's hard to spot
the
volcano unless you have a trained eye
good yeah to take a better look at the
lay of the land Chris needs to take to
the air a monitor connected to a drone
provides him with a bird's eyee view of
campy
F so the first thing you notice from up
in the air is as we come round to the
Shoreline towards the Bay of Naples we
start to pick up a prominent Ridge line
it comes all the way round towards the
main city center it's clearly curved and
then within there it's a very densely
populated flat area here this Ridge line
could be telling us something about a
feature that is actually forming this
landscape an ancient very large
volcano and in particular we're actually
looking at a
Caldera a Caldera is a collapsed
[Music]
volcano in the past campy flra was a
flat
plane deep beneath was a huge reservoir
of bubbling
magma then the magma started moving
upwards smashing through weaknesses in
the
Rock and erupting powerfully
but this left an empty void beneath the
surface with nothing left to support the
weight of the plane it collapsed
downwards forming a crater known as a
Caldera radioactive dating of rocks
reveals that campy flra Caldera formed
15,000 years ago
and at nearly 8 mil wide it must have
been created by an incredibly large and
Powerful eruption