Earthquake Rome, that's why now even the capital is afraid

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The buildings oscillate more and more often also in the Capital. "He also heard in Rome." Whenever, unfortunately with more and more frequency in the last twenty years, there is an earthquake in Italy, the news that has been felt in many municipalities of the eternal city bounces. What is going on? Why was the quake of yesterday in Abruzzo so distinctly felt in various areas, even though it was of magnitude 4.4? There are two answers: the first may seem trivial, but in reality it is substantial.

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Earthquake, Ingv alarm: border between Lazio and Abruzzo area with high seismic hazard
Earthquake in L'Aquila, another shock of 3.5. 4.4 earthquake felt in Rome. Schools closed in Ciociaria today, inconveniences on trains

Over the past twenty years, from L'Aquila to Amatrice to the Marche, earthquakes with higher magnitude have occurred in areas closer to Rome. Objectively, the shocks, year after year, are approaching Rome. The second one is connected to a peculiarity of the Capital: the type of land on which some districts rest, in particular those along the Tiber, amplifies the perception of the earthquake. Thus, even if the epicenter is in L'Aquila, in Accumoli (Rieti) or in Visso (Macerata), then the buildings also oscillate in some municipalities of Rome. Does it mean that in the capital there is a high seismic risk? Yes and no.
RISKS
The classification sees the grade 2B, that is medium danger, in the municipalities IV, V, VI, VII, VIII, IX. Others have a lower risk. Different speech for other areas of the province, such as the Colle Albani. But in general, even in Rome, this very characteristic of amplification should convince the institutions to accelerate the safety of all buildings and buildings, starting from schools, built when anti-seismic regulations were less stringent. For Rome, a phase of greater attention is being paid to the safety of buildings. Another theme: the presence of underground cavities. It explains a research by Ispra: "These cavities constitute an intricate network of tunnels under the city, constituting systems, sometimes with several levels, which deepen at different depths. These voids are all of anthropic origin ". Francesco Peduto, president of the National Geologist Council, confirms: "Let's start with a given: the territory of central Italy has always been rather dancer, problematic; the seismic swarm following the shocks of 2016 has not yet been exhausted. And we keep in mind that the tremor of late afternoon yesterday, of magnitude 4.4, occurred between the provinces of Frosinone and L'Aquila. The territory of the city of Rome is formed by a type of land that, even for seismic events of not too strong entity, has an amplification effect. Rome usually suffers from unforeseen but induced earthquakes ". Alessandro Amato, geologist and research manager at the National Institute of Geophysics and Volcanology, observes: "The areas where the amplification effect is most significant are those where there are more loose sediments, alluvial soils, river sediments, clays. We are talking about neighborhoods closer to the Tiber, like Prati, Magliana, San Paolo, Marconi, Testaccio ».
Mauro Evangelisti
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