The Phlegraean Fields supervolcano shook the area around the port city of Pozzuoli with a series of powerful earthquakes.
Pozzuoli – In recent weeks, the super volcano west of Naples has been south Italians It was relatively quiet. In September, the Bay of Bosuvoli spooked some 350,000 residents with more than 1,100 aftershocks; The strongest tremor was 4.2 on the Richter scale. Parts of the facade fell into the streets. At its peak, the Earth shook 160 times in less than 24 hours.
After a hiatus, Italy’s most dangerous volcano has resumed activity
Supervolcano in October Suddenly a strange silence. But on Sunday (October 15), the supervolcano returned with two earthquakes of magnitude 1.45 and 1.9. This was followed by an earthquake on Monday Size 3.6. But that’s not all: On Thursday night (October 19), the Earth shook 13 times between 7:32 pm and 6:05 am. Eight aftershocks were above magnitude one, with a magnitude 2.2 earthquake at 6:01 a.m.
12 earthquakes occurred between 5:24 a.m. and 6:05 a.m. — a classic swarm earthquake. This indicates volcanic activity underground. Magma, gas or hot water rises and sets the rocky ground in motion. In fact, many locals fear the earthquakes are precursors to the eruption of the supervolcano, which has had devastating effects in the past.
Supervolcano terrorizes region of Italy: Locals think to move from Pozzuoli
The people of Pozzuoli and the neighboring Neapolitan district of Bagnoli are at their wits’ end: “I’m seriously considering leaving Pozzuoli, I haven’t slept in peace since August,” writes a user in the Facebook group “People in the Red Zone Plegraion Fields”. Another replies: “If you have the chance, do it.” One woman sarcastically writes: “Three good shocks, yes, what a good wake-up call!” The epicenter of the mass earthquake was again in the Solpadara trough. Known for hot springs and steam geysers.
Again, many local residents noticed: many of them first heard the rumble of thunder before feeling the actual earthquake. “The ground acts like a huge loudspeaker that moves under our feet and transmits the vibrations to the air and through it to the atmosphere,” explains geologist Pietro Bongiorno of the phenomenon at the site. geopop.it.
First a great thunder – then the earth shakes
This sensation of thunder before an observation shock wave is felt is explained by Bongiorno by the different speed of propagation of seismic waves: “The waves that arrive first and are felt are longer (“first” B waves), they are much higher. They are harder to vibrate but they can produce an acoustic signal.” According to the geologist, the observable waves are transverse waves, also known as “S” waves. Bongiorno: “They’re usually slower than B waves.”
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