Sandia Labs did some amazing supercomputer simulation work related to the Tunguska event, and produced a set of fascinating simulation videos [1].
It looks like these simulations were referenced in the illustration & chart just ahead of the Conclusion section.
Also some pretty interesting results in the Sandia study:
>> “The asteroid that caused the extensive damage was much smaller than we had thought,” says Sandia principal investigator Mark Boslough of the impact that occurred June 30, 1908. “That such a small object can do this kind of destruction suggests that smaller asteroids are something to consider. Their smaller size indicates such collisions are not as improbable as we had believed.”
It looks like these simulations were referenced in the illustration & chart just ahead of the Conclusion section.
Also some pretty interesting results in the Sandia study: >> “The asteroid that caused the extensive damage was much smaller than we had thought,” says Sandia principal investigator Mark Boslough of the impact that occurred June 30, 1908. “That such a small object can do this kind of destruction suggests that smaller asteroids are something to consider. Their smaller size indicates such collisions are not as improbable as we had believed.”
Definitely worth checking out [1] https://newsreleases.sandia.gov/releases/2007/asteroid.html