Study shows Main Marmara Fault is rupturing eastward toward Istanbul
Researchers revealed that the Main Marmara fault in northwestern Türkiye has been rupturing progressively eastward for more than a decade, culminating into the strongest earthquake in over 60 years beneath the Sea of Marmara, a MW 6.2 quake on April 23, 2025. New findings raise concern that a locked fault segment south of Istanbul could generate a M7.0 earthquake in the future, rattling the city of 18 million people.











