 The force of the explosion is estimated to be about 10–15 megatons.It flattened more than 2,000 square kilometers (500,000 acres) of pine forest and killed thousands of reindeer.Krasnoyarsk Krai was created in 1934 after disaggregation of the West Siberian and East Siberian Krais and later included Taymyr and Evenk Autonomous Okrugs and Khakas Autonomous Oblast.