Jul 19 (TheWrap.com) - Due to popular demand -- and a surge of Twitter activity -- Syfy re-aired its original movie "Sharknado" on Thursday night.

The rebroadcast averaged 1.9 million total viewers, 701,000 of those in the advertiser-sought 18-49 demographic.

The encore was also the most tweeted program on cable Thursday, excluding sports and special events.

The special encore presentation of the Ian Ziering/Tara Reid thriller hit the airwaves at 7 p.m. Anyone who missed it the first time got a chance to see what all the fuss was about -- a tornado full of sharks attacking L.A.

"Sharknado" premiered to nearly 1.4 million total viewers on July 11. In the 18-49 demo, it earned 566,000.

Compared to other recent Syfy original movies, those numbers put "Sharknado" in mixed standing. It had a larger audience than June's "Independence Day-Saster," which drew 1.3 million total viewers, though it was less-watched than April's "Battledogs," which drew 1.5 million total viewers, and the March classic "Chupacabra vs. the Alamo," which also took in roughly 1.5 million total viewers.

On the social media front, "Sharknado" proved to be an enormous success. It was the most social program of the night with 387,000 mentions across social media platforms and generated nearly 5,000 tweets per minute at its peak.

Syfy will replay "Sharknado" on July 27 at 9 p.m. as part of an all-day "Sharkathon" movie festival.