The main events of the February revolution were the mass protests and the violent armed clashes in the Russian capital, St Petersburg. The main effect of the February revolution was the abdication of the Tsar thereby ending the Russian monarchy. The leader of the February revolution was Alexander Kerensky.
The main events of the October Revolution was the overthrow of the Kerensky government in St Petersburg by the Bolsheviks. The main effect of the October Revolution was the establishment of communist rule in Russia. The leader of the October revolution was Lenin.