Complex sentence: Both Leninakan and Kirovakan were roughly the same distance from the epicenter yet Leninakan had greater damage and this may be explained by a sedimentary layer that is present beneath the city.
Split into simpler sentences: Both Leninakan and Kirovakan were roughly equidistant from the shock, yet Leninakan had greater damage. This may be explained by a sedimentary layer that is present beneath the city.