The leak reportedly led the ISS to lose 0.8 millibars of air pressure per hour, which is both big considering what was at stake and low for a 2-mm hole when the outside is near to complete vacuum. Am I missing something? How could the German astronaut even block it with his finger without any damage if complete vacuum was on the other side?
Per this comment, the value of 0.8 mbar/hr seems to come from:
- https://live.24liveblog.com/live/UMdK0
- https://spaceflightnow.com/2018/08/30/space-station-pressure-leak-status-center/