The reaction to President Obama's victory on election night broke several records on Twitter, the social media site reported.
"With 20 million tweets, Election Day just became the most tweeted about event in US political history," the site announced.
Minutes after news networks projected that Obama had won a second term, Obama tweeted a picture of him hugging his wife. That became his most retweeted tweet ever, Twitter reported.
At the height of the reaction to the networks' announcement just after 11 p.m., election-related activity spiked to an all-time high of 327,453 tweets per minute.