Una scossa di terremoto di magnitudo 4.1 è stata registrata attorno alle 14 a Istanbul, circa mezz'ora dopo quella di magnitudo 5.8 che è stata avvertita nitidamente dalla popolazione in tutta la metropoli sul Bosforo. Molta gente è scesa in strada in preda al panico e almeno otto persone sarebbero rimaste ferite.
L'unico danno rilevante registrato finora è la caduta della punta di un minareto in una moschea di Avcilar, sulla sponda europea della metropoli sul Bosforo.
Secondo la protezione civile turca (Afad), la prima scossa ha avuto un epicentro a 7 km di profondità nel mar di Marmara al largo di Silivri.
Due giorni fa un'altra scossa di magnitudo 4.7 era stata avvertita in diverse parti della città, anche in quel caso senza provocare danni. Istanbul e la regione di Marmara sono considerate ad alto rischio sismico per la presenza della faglia nord anatolica.
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