Description
You must run away from the deadly chunks that starts at the x0 z0 Chunk or you will die.
Each day, the expansion rate will get pluse a chunk (16 blocks) until it reaches its maximum (set by a gamerule ('lethalRadiusLevel') (default is 10)), starting at 1 chunk (16 blocks).
But don't forget, if you respawn in the deadly chunks, you're as good as dead.
I would recommend regularly deleting chunks using external tools like MCA Selector
(10.000 chunks = 160.000 Blocks ≈ 2 GB).