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Sono 1'230 i terremoti registrati lo scorso anno in Svizzera. Si tratta di un nuovo primato, che è però legato in buona parte al potenziamento della rete di sismografi, in grado quindi di misurare scosse di intensità minore, come sottolinea il Servizio sismico svizzero del Politecnico federale di Zurigo.
La mappa dei terremoti registrati in Svizzera
La scossa più violenta si è verificata il 6 marzo, quando un terremoto di magnitudo 4,6, il più forte degli ultimi 10 anni, è stato percepito anche a sud delle Alpi.
Oltre 700 delle scosse registrate sono considerate "microsismi", con un magnitudo inferiore all'uno. I terremoti di magnitudo superiore al 2,5, quindi percettibili dalla popolazione, sono stati 23, perfettamente in linea con la media degli ultimi 42 anni.
ATS/sf
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