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It's global warming I say.

Serious side, as Togo said, there's a different magnetic pattern there then the rest of the world, which accounts for getting equipment going haywire. The waters there go from 50-100 feet, so waves can get pretty high, 30-40ft tall, which is enough to sink pretty much any ship. The aircraft crashing is unknown, but it's possible that down drafts occur there a lot, which would bring a plane down.

Though, anything is possible!

Nah... seems a bit silly to me. Aliens... yes. Ghosts... no. Bremuda Triangle... don't make me laugh.

Methane builds up at the ocean floor and is kept solid from the pressure. Once a piece breaks off, it rises and sublimates to a gas. This forms a giant bubble which can easily sink a ship under the right circumstances.

Also, methane rising from the sea can cut plane engines.

I think that more ships went down there so everyone made a big fuss about it. I mean, it's a lot of fun to think about and I love reading books and watching movies about it. But I'm pretty sure that there is a logical explanation.

(Now, if you asked about the Loch Ness Monster I would have a different answer)