More than 48 million viewers across 34 million homes tuned into to President Obama’s State of the Union address which was broadcast on 11 networks.

Roughly 83 millions viewers tuned in to at least one minute of the telethon, which was carried live on Friday January 22, 2010 from 8:00PM to approximately 10:00PM on 33 networks.

Thirty-nine percent of Facebook users in the U.S., U.K. and Australia have already donated to the Haitian earthquake relief efforts. Another 21 percent still plan to do so, according to a joint survey conducted by Facebook and Nielsen.

In the wake of Tuesday’s devastating 7.0 earthquake in Haiti, much of what people around the world are learning is coming from social media sources, according to The Nielsen Company.