The 1907 Qaratog earthquake occurred at 04:23 UTC on 21 October near Qaratog (Karatag) in the border area between Uzbekistan and Tajikistan, then part of the Russian Empire. The shock had an estimated surface-wave magnitude of 7.4 and a maximum felt intensity of IX (Violent) on the Mercalli intensity scale. Estimates of the death toll range between 12,000 and 15,000.