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Based on a high resolution seismic reflection data set, we investigated the deep structure of the volcano. Here we show that seismic wave amplitude variations with distance from the radiating source provide clear evidence for large amplitude seismic reflections from the top of an extended supercritical fluid-bearing rock formation at about 3,000 m and of an about 7,500 m deep, 1,000 m thick, low velocity layer, which is associated with a mid-crust, partial melting zone beneath the caldera. The modeling of magma properties based on measured seismic velocities indicates a relatively high melt percentage (in the range 80–90%). These new data suggest that a large magmatic sill is present well within the basement formations, which is possibly linked to the surface through a system of deep fractures bordering the caldera. The lateral extension and similar depth of the melt zone observed beneath the nearby Mt.Vesuvius support the hypothesis of a single continuous magma reservoir feeding both of these volcanoes.
The miracle of the liquefaction of St. Januarius' blood, patron of Naples, takes place three times a year: on the Saturday preceding the first Sunday of May (the day of the translation of the Saint's relics), on September 19 (the day of his martyrdom) and on December 16 (the anniversary of the eruption of Mt. Vesuvius in 1631, when the lava stopped at the doors of Naples, one of the most remarkable miracles manifested through St. Januarius' intercession).
...the people of Naples have witnessed in its history that when the miracle doesn't happen, it's often a premonition of evil. Some of the occasions where the blood didn't liquefy in the last few decades were: 1980, when a terrible earthquake hit South Italy; 1973, when Naples suffered an outbreak of cholera; 1939, when World War II broke out; 1940, when Italy joined the War; 1943, when Italy was occupied by the Nazis. And throughout the centuries the absence of the astonishing phenomenon has been precedent to religious persecutions, eruptions of the Mount Vesuvius, earthquakes, revolutions, wars and the deaths of kings, archbishops and Popes. Rarely the liquefaction happens outside of the three traditional dates.
We report evidences of active seabed doming and gas discharge few kilometers offshore from the Naples harbor (Italy). Pockmarks, mounds, and craters characterize the seabed. These morphologies represent the top of shallow crustal structures including pagodas, faults and folds affecting the present-day seabed. They record upraise, pressurization, and release of He and CO2 from mantle melts and decarbonation reactions of crustal rocks. These gases are likely similar to those that feed the hydrothermal systems of the Ischia, Campi Flegrei and Somma-Vesuvius active volcanoes, suggesting the occurrence of a mantle source variously mixed to crustal fluids beneath the Gulf of Naples. The seafloor swelling and breaching by gas upraising and pressurization processes require overpressures in the order of 2–3 MPa. Seabed doming, faulting, and gas discharge are manifestations of non-volcanic unrests potentially preluding submarine eruptions and/or hydrothermal explosions.
originally posted by: Imagewerx
I was just about to book my holiday in Italy next year,excited that for the first time ever I'd get to see some active volcanoes such as Etna,Vesuvius and maybe even Stromboli if I've got time.I've got a couple of days in Naples planned,so will be keeping a VERY close watch on any activity here.I camped in Yellowstone this year,which is the closest I've got to any volcanoes so far.
Looking at Google Earth,I see an area marked Phlegraean Fields which appears to be white mud which is identified as the caldera.Is this the actual first part to go if it does blow as I see a massive tree lined crater about a mile or so to the north of this one?
on December 27, 2004 an invisible burst of energy the equivalent of half a million years of sunlight shone on Earth. Many orbiting satellites electronics were zapped and the Earth's upper atmosphere was amazingly ionized from a massive hit of gamma ray energy. Source
The December 26, 2004 Indian Ocean tsunami was caused by an earthquake