Color me skeptical
The world is ringed with seismographs so sensitive they can detect events like the collapse of the Murrah Federal Building from hundreds of miles away. An impact that large would've been detectable from thousands of miles away, probably all around the world. It isn't as if you can hide things like that. Funny how no one else besides Pravda is reporting this. It would've been very big news on the space sites at the very least. Sounds bogus to me.