Tough for methane to take out planes. The Transportation Safety Board or some such authority records (still going on), the missing planes, ships and people. One such report stated that a well trained pilot was flying in the triangle and just disappeared off the radar for 30 minutes, he was not in an amphibious aircraft and after he just popped up on the radar after said duration, like nothing happened.
Interestingly enough there is another triangle, the Devil's Triangle in the East with a very similar event history.
The Earth has some wild magnetic fluctuations in places, given the amount of solar particulate constantly blasting our shields I have come to believe that these 'Triangles' may act as magnetic vortexes but only when they are in alignment with some other element.
We know that each heavenly body in our solar system has a strange tendril-like connection to the Sun. It is possible that our magnetic fields are disturbed by these tendrils through regular solar rotational dynamics.
Good story so much more to this!