Turkey is situated on major fault lines, making it prone to seismic activity. Notably, a 6.2 magnitude earthquake struck Istanbul on April 23, 2025. (ft.com) This market resolves to 'Yes' if an earthquake of magnitude 5.0 or greater occurs anywhere in Turkey between May 23, 2025, and August 31, 2025, as reported by the United States Geological Survey (USGS). (database.earth)