Thousands of people have been killed in Turkey and northern Syria after a 7.8 magnitude earthquake struck on Monday. According to data from the German Federal Institute for Geosciences and Natural Resources (BGR), the earthquake and its aftershocks hit the areas of Central Turkey, East Turkey and the Turkish-Syrian border region between Monday 6 and Tuesday 7 February. As our chart shows, the initial 7.8 quake was closely followed by a 6.7 magnitude aftershock in the same region, and a 5.6 magnitude aftershock in the Turkey-Syria border region.