Power of Silver Fang (Bang) I was watching the anime and I noticed in the episode where the meteorite was about to hit earth, Silver Fang or Bang still standing beside Genos. As far as the animated serial goes, just before Saitama is about to enter the scene, Bang's expression changes slightly as if he is about to do something.

Also, in some later episode, he hypothesizes what would have happened if he used the fist of flowing water on the meteorite? How much exactly is Bang's power and could he had destroyed the meteor?
Well if you're trying to compare Saitama and Bang's power it's pointless. In one of the specials when Saitama goes to his Dojo, Bang admits himself that Saitama is way more powerful. Plus we don't know the limitations of Saitama's power. On the other hand, he's very likely stronger than Genos based on the fact that he's rank 3 in the S class of Heros and his experience and technique. Also if you watch the last episode where the S class Heros fight the monster, Bang seemed to be slightly stronger and fair slightly better than the other Heros like Atomic Samurai.

I'd say Bang is very likely stronger than all the S class Hero's below his ranking. However, Tatsumaki appears to be stronger than him.