Türkiye Jeoloji Bülteni

February 3, 2002 Çay (Afyon) Earthquakes

Abstract: The Sultandağı-Çay (Afyon) and surrounding regions were affected by two destructive earthquakes occured onFebruary 3, 2002 at 9.11 and 11.26 respectively. These events caused 45 deaths and damaged hundreds of buildings.These earthquakes are called as Çay earthquakes with respect to surface ruptures, epicenters and damagedistributions. USGS data indicate that first destructive main shock which was located near Çay town. 080° trendingobserved surface rupture of this first event represents at least 2 km length and have a vertical displacement of 35 cm.The epicenter of latter, which was happened two hours later, locates around Kadıköy village. Focal mechanismsolution and field evidences indicate that presence of a 020° normal faulting with a vertical displacement of 10 cm.We assume that the first event (Mw=6.2) probably have a role of triggering on the 020° trending fault movementbecause of the forming of two ruptures normal to the each other.