This is just pure nonsense. Nothing ever hit the ground. It had no effect on the base at all.
https://www.military.com/daily-news/2018/08/03/greenland-air-base-unharmed-apparent-meteor-explosion.html
"Meteor explodes with 2.1 kilotons force 43 km above missile early warning radar at Thule Air Base," tweeted Hans Kristensen, director of the Nuclear Information Project for the Federation of American Scientists. Kristensen this week tweeted about the event after a user, named "Rocket Ron," publicized that a "fireball was detected over Greenland on July 25, 2018 by US Government sensors."
NASA, which tracks meteor, comet, asteroid and other space debris movements, confirmed these details.
"Meteors of this magnitude or greater, caused by the impact of small asteroids (few meters in size) with Earth’s atmosphere, occur a few times a year," JoAnna Wendel, a NASA spokeswoman, said. "By comparison, the 2013 meteor over Chelyabinsk, Russia released over 200 times the energy of the Greenland meteor."