Plausible, I meant to say.

If this phenomenon is the earth's magnetic field, the first person to write about it it scientifically would become very well known.

I recommend you write an article about this and name and date it, so that the credit can rightfully go to you. Even a blog post should help stake your claim. Maybe you don't have to use your real name either, but make a blog in a pseudonym that you can always claim with your real name later, if you want.

It's great to share your ideas (science doesn't advance when we hoard them, and those with ideas, like you, never run out, so they can never all be 'stolen' from you) but it's a pet peeve of mine when credit for ideas is stolen by undeserving idea-leeches (there are, sadly, many of those). That's why I always encourage anyone with a great idea to claim it, ASAP. Prove you thought of it first with a simple dated document you can lay claim to authoring, then share widely, to refine it, help society, and have society help you find your next great idea. That's science at its best.

Meanwhile I'll look forward to reading about what else you discover/hypothesize. :)