Hmmm.... your game speed might have been different, but now that I think about it, your probably right.
Here are my maps:
Key:
Orange shapes: lava flows
Grey: ground
Brown bar(s): common mine
Yellow Bar(s): rare mine
Circle with a V in it: volcano
The word Mark followed by a number: when that lava flow erupts
Cyan shape: Meteors are commen here
Brown shape: Earth Quakes are commen here
Green shape: Tornadoes are commen here
Bright green shape: Electrical Storms start here
Purple/pink blob: Blight starts here
Red triangle: A starting spot
Black lines not outlining anything above: Clifs/walls
Any lava flows have black ground underneath them.
Disasters can still happen anywhere, they just are more commen in their areas mentioned above.
Remember, the lava doesn't start on the map, so starting spots in lava arn't mistakes.
I tried to make it equal.
Reminds me of the first tutorial (somehow).
Is lopsided, the right side should be less squished.