Not one big enough to cause another great extinction, but small enough to just turn a whole small country and parts of neighboring ones into a huge crater. Will the people who was evacuated out after NASA stated a warning try to rebuild the country after everything has settled down or do they’d become citizens of another country?
What about after burning up was still enough to destroy the country. It doesn’t have to be a country size chunk. Just enough to destroy it. I’m sure there is a size that post burn is enough to level the place.