Well, if you weren't, now you can worry.
Writing about the newly discovered gargantuan methane plumes on December 12, 2011, Nick Jardine quotes thusly:
One scientist told the Independent: "Earlier we found torch-like structures like this but they were only tens of meters in diameter. This is the first time that we've found continuous, powerful and impressive seeping structures more than 1,000 metres in diameter. It's amazing."