Leninakan became a major industrial center in the Armenian Soviet Socialist Republic and its second-largest city, after the capital Yerevan. The city suffered major damage during the 1988 Armenian earthquake, which devastated many parts of the country. The earthquake occurred along a known thrust fault with a length of . Its strike was parallel to the Caucasus range and dipped to the north-northeast. Bruce Bolt, a seismologist and a professor of earth and planetary science at the University of California, Berkeley, walked the fault scarp in 1992 and found that the vertical displacement measured along most of the length with the southwest end reaching .
