Complex sentence: At least 13 people from the districts of Gudermes, Shalinsky and Kurchaloyevsky were killed by the quake and a series of aftershocks, which were felt throughout the North Caucasus, and even in Armenia and Georgia.
Split into simpler sentences: At least 13 people from the districts of Gudermes, Shalinsky and Kurchaloyevsky were killed. The mainshock and a series of aftershocks were felt throughout the North Caucasus, and even in Armenia and Georgia.