It is estimated that the Tunguska explosion knocked down some 80 million trees over an area of 2,150 km2 (830 sq mi), and that the shock wave from the blast would have measured 5.0 on the Richter magnitude scale.
Wow!
Edit to add: The Tunisia event is really interesting, but I don't think this photo is accurate based on the Wikipedia article.
No. There was no impact at the Tunguska event, it was an airburst. 6-10 kilometers above the surface.
This image as far as I can tell is from the Hoia Baciu Forest in Romainia, but reverse search is iffy on the matter because both are heavily steaped in unscientific woo and conspiracy mongering and I don't have the time, nor the patience to sift through it all.
It's not the Hoia Baciu Forest. That clearing is not round and has different types of trees. Here's a better picture of the Tunguska epicenter. http://olkhov.narod.ru/tungus1.jpg It's not a very deep crater because the main explosion was above the surface but there was some impact. Even given that, it's not really surprising that it remains unpopulated with trees as it literally fried anything that was alive in the circle (i.e seeds) so the only way the forest could grow back is slowly. Trees grow, get wider, and drop seeds. The seeds grow, get wider and drop seeds and so on.
Wow!
Edit to add: The Tunisia event is really interesting, but I don't think this photo is accurate based on the Wikipedia article.
This image as far as I can tell is from the Hoia Baciu Forest in Romainia, but reverse search is iffy on the matter because both are heavily steaped in unscientific woo and conspiracy mongering and I don't have the time, nor the patience to sift through it all.