That’s because Russia is vast.
Yes Russia is a large land mass. What I was referring to though, was the large objects that have hit there. There was a very large object of some type that hit in the early 1900’s that affected a huge area.
Not to pick nits but it never hit the ground. It was much like the latest event this week. It blew up at high altitude and converted all it's kinetic energy into a blast wave which devastated hundreds of square miles. There was no impact crater, no radiation, and no debris were ever found. It happened to be in an extremely remote area with a very small and dispersed population so there were no human casualties. The major damage was a huge forest laid low like a giant crop circle with all the fallen trees pointing away from ground zero. The blast was estimated to have been in the 50 megaton range.
Yes that was a big blast but it was around 1906 and hasn't repeated since. The latest one was in the 20 kiloton range, much much smaller and those two do not seem to mark a trend being over 100 years apart.
Chances are we'll we more of these events because now we have observational tools which weren't available even 50 years ago. Who knows how many medium to large rocks have fallen into the oceans unnoticed?
Regards,
GtG