The lowest natural temperature ever directly recorded at ground level on Earth is −89.2 °C (−128.6 °F; 184.0 K), which was at the Soviet Vostok Station in Antarctica, on July 21, 1983. Analysis of satellite data indicated a probable temperature of around −93.2 °C (−135.8 °F; 180.0 K), also in Antarctica, on August 10, 2010; however, this reading was not confirmed by ground measurements. Both readings are lower than the sublimation point of carbon dioxide (dry ice).