Click image for an even bigger bang.

BBC - on this Day: Now that was a big bang and all the dust contributes to global warming today. It’s not only we humans that pollute the atmosphere, but also events like this - although volcanic eruptions are pretty rare and lame compared to some earlier earth periods.

More? Wikipedia entry and don’t miss the 1980’s section with some great images! Then you can ‘feel’ how massive that explosion was.