Ağgöl is believed to be one of the seven lakes which were created as a result of a major earthquake in Ganja on September 25, 1139, when huge block of Mount Kapaz collapsed blocking the path of rivers thus creating a beautiful lake Göygöl and seven other smaller lakes: Maral-gol, Jeyran-gol, Ordek-gol, Zalugolu, Aggöl, Garagol and Shamligol. The further formation of the lake was also due to landslides.