The Tunguska event proves very clearly that the Earth is actually flat.
Newspapers could be read at midnight in London, photographs could be taken outdoors in Stockholm without flash apparatus; no other meteorological/astronomical phenomenon occurred at that time in the world, no such records exist.
If the light from the Sun could not reach London due to curvature and/or any light reflection phenomena, then certainly NO LIGHT from an explosion which occurred at some 7 km altitude in the atmosphere could have been seen at all, at the same time, on a spherical earth.
Will you stop feeding your readers with misleading information sandokhan? I am sure they know your bad reputation by now.