In the third aliyah G-d tells Moshe and Aharon to separate themselves from this community so G-d can destroy them in an instant. Moshe and Aharon fall on their faces and pray to G-d to not destroy everyone for the sake of the few who sin. Actually, according to Rashi, they pointed out that G-d is not like a mortal king who doesn't know a person's thoughts. Therefore a mortal king is likely to punish many because of a few, because the mortal king doesn't know who the guilty few are. But G-d knows each and every thought of each and every creature; therefore, G-d can distinguish the good from the bad.
G-d then made the earth opens up and swallows Korach and the ringleaders of the rebellion and their families, and fire consumes the rest of the 250 rebels.
The next day, the whole community starts complaining to Moshe and Aharon that they killed G-d's people! Once again the cloud of Glory appeared and ... (to be continued in the next aliyah)