[meteorite-list] Tunguska rates

[E.P. Grondine]

Hi Arnauld, all, 

The problem is that Tunguska type blasts have been occuring recently (for the last 5,000 years) at a rate of 1 per 100 years, not 1 per 1,000. Whether this represents a short term phenonmenon or the long term rate is not currently known.

I used to put together catalogues of "known and suspected impacts", you may want to google that, and if you have not bought a copy of "Man and Impact in the Americas" yet, well, it is the best available recent impact rate data for the Americas. 

E.P. Grondine
Man and Impact in the Americas