Harold Camping on his May 21st doomsday prediction

(CBS/KPIX) The founder of Family Radio in Oakland - heard in 48 different languages around the globe - is behind the worldwide, multimillion dollar campaign letting people know that judgment day is coming on May 21, 2011.

That's right, Saturday.

89-year-old Harold Camping says that his 50-year study of the Bible is behind the claim.

So what's the end of the world look like?

"There's going to be a big earthquake that will make the one in Japan seem like a Sunday School picnic," Camping told KPIX's Mike Sugerman.

This isn't Camping's first prediction of the end. Back in 1994, Camping warned that doomsday would strike.

When nothing happened, he pronounced it an error in his math, but this time he says it'll be different.

"This day, May 21, 2011, is extremely important, as it will also be the first day of judgement, a time of horrible death and destruction, for all those left behind," Camping said.

There will be a five-month period for non-believers to get on board, he continued, because the real end of the world is set for October 21, 2011.