The first trajectory map created from eyewitness accounts. It was put together by A.V. Voznesensky, former head of the Irkutsk Observatory, in the mid 1920s and used by Kulik in his search for the epicenter.

A higher resolution version - UFOs22chartHR.jpg

The Zigel map

A population density map of east Asia (circa 1972) with the Zigel-Roerich trajectory overlaid. The map is, of course, 64 years too young to represent the actual population diversity of 1908, but it gives some idea of the population spread over the whole of east Asia and Russia in comparison with the Zigel-Roerich trajectory.

A diagram that I drew up just for the novelty. It compares the Tunguska forest fall (butterfly pattern) to Meteor Crater in Arizona.

A micro-barograph recording of the Tunguska explosion. A barograph is an instument that records changes in air pressure, not to be confused with a seismograph, which, of course, measures earthquake magnitude. As you can see, the Tunguska explosion appears to be separated by two distinct events. A low frequency event followed by a high frequency event. The high frequency event would be more characteristic of a nuclear explosion.