A deadly earthquake has struck across the border region between Turkey and Syria. The 7.8-magnitude quake, one of the strongest earthquakes to hit Turkey in more than 100 years, struck just after 4 a.m. Monday local time, 23 kilometers (14.2 miles) east of Nurdagi, Gaziantep province, at a depth of 24.1 kilometers (14.9 miles), the United States Geological Survey (USGS) said.