On April 23, 2025, a 6.2 magnitude earthquake struck the Sea of Marmara, about 40 km from Istanbul, raising alarm over the city’s seismic vulnerability. The quake, recorded by thirty-three seismic stations, highlighted concerns due to Istanbul’s history of major earthquakes, particularly from the North Anatolian Fault. Experts estimate a 65%-70% chance of a magnitude 7 or higher quake by 2040, potentially destroying 600,000 homes and displacing millions. Despite stricter building regulations post-1999, about 40% of structures remain at risk. The city’s dense population and infrastructure vulnerabilities pose significant challenges for future seismic events.