Yup. I'm a bit confused/surprised. But trying to find a logical reason for it. Unfortunate that it happened when I wasn't here. But where it was, I wouldn't have immediately noticed if I was here unless I was in that area.I absolutely cannot imagine that a smouldering fire would last several weeks under the surface just to break out on a rainy day. Much rather a lightning could have struck. But who knows...
I've seen fires re-start before from the rain breaking through the crust, but that's normally only a day or two afterwards.
Who knows. I suspect it will never be answered so I'm trying not to overly think about it. Just been out and checked all the edges again. I think I have it contained. Given up with the hot/burning middle bits, they should just burn themselves out. The dark actually helps, you can see the active parts - though thinking about it, heading out with the thermal camera (just put it on charge) would be a better idea as I'd be able to see where it's actually hot if it's under the surface.