Q. Will Satan be in Heaven and on earth during the tribulation?
A. If by tribulation you’re referring to the entire 7 years of Daniel’s 70th Week, then Satan will have access to both heaven and earth for the first half.
But at the beginning of the Great Tribulation, which is the last half of Daniel’s 70th Week, Satan and the angels who rebelled with him will be expelled from heaven for good and will be confined to earth (Rev. 12:7-10).