Marsili

Marsili
Aeolian arc, including coastline and depth contour lines for every 500 meters.
Marsili Tyrrhenian Sea
Summit depth	−450 m (−1,476 ft)
Height	3,000 m (9,800 ft)
Location
Location	Tyrrhenian Sea
Coordinates	39°15′00″N 14°23′40″E / 39.25000°N 14.39444°E / 39.25000; 14.39444
Country	Italy
Geology
Type	Submarine volcano
Volcanic arc/chain	Aeolian Arc
Last eruption	1050 BC ± 200 years[1]

Marsili is a large undersea volcano in the Tyrrhenian Sea, about 175 kilometers (109 mi) south of Naples. The seamount is about 3,000 m (9,800 feet) tall; its peak and crater are about 450 m below the sea surface. Though it has not erupted in recorded history, volcanologists believe that Marsili is a relatively fragile-walled structure, made of low-density and unstable rocks,^[2] fed by the underlying shallow magma chamber. Volcanologists with the Italian National Institute of Geophysics and Volcanology (INGV) announced on March 29, 2010, that Marsili could erupt at any time, and might experience a catastrophic collapse that would suddenly release vast amounts of magma in an undersea eruption and landslide that could trigger destructive tsunamis on the Italian coast and nearby Mediterranean coastlines.^[3]