The Super Bowl 2014 generated 1.8 billion Twitter TV Impressions

"There’s nothing quite like watching the Super Bowl—or jumping into the conversation about it on Twitter. And this year’s big game had plenty of action—both on the field and across social media channels. According to Nielsen SocialGuide, Tweets in the U.S. about Sunday's telecast of Super Bowl XLVIII on FOX reached a Unique Audience on Twitter of 15.3 million people, garnering a total of 1.8 billion Twitter TV impressions throughout the night. Twitter activity peaked during the event at 10:00 p.m. with a total of 301,400 Tweets sent during the minute"

Source:  Nielsen, 3rd February 2014