The rate of impacts on Earth and the Moon can be measured by the actual crater density on surfaces with long Exposure ages.

The Appollo programme did this for the Moon. From that we have established the size-frequency relationship reasonably well.

Within this background it is totally fatuous and criminally misleading for you to begin a paragraph titled "CLASS 10: A collision capable of causing global climatic catastrophe. Such events occur once per 100,000 years, or less often.", and then to list 6 claimed events in the last 5,000 years.

You are internally and externally inconsistent EP, and just plain wrong.

If your claimed cratering rates were real, the ATacama desert in Peru and the Australian outback (both very old land surfaces) would be pocked by literally millions of impact craters.

They aren't, so you're wrong.

(Pause to thumb nose and dance in circle singing :Nyah Nyah, Nyah nah-nah!) :-)