Do the owners get to extend property line to new expansion?
No they retain their original boundaries. If what you suggest happened than their property would increase 100x or more.
That's unfortunate. Here I'm pretty sure that property owners land actually gets extended (not just from lava flows, but also jökulhlaup, which are volcanic glacial outburst floods carrying massive amounts of sediment... sort of like "temporarily add a flood-stage Amazon River to the country").
New map - even smaller changes (although they're just showing one day of flows this time, not two). Also, the increasing depth of the water could be distorting how much material is actually being laid down.
They've now added in a dashed line for the former coastline, which is helpful.
Hopefully she'll lay down a lot of material just below the waves. Some new shallows that can be recolonized over time. Fresh nutrients and unoccupied habitats for life. New formations for divers to see.
Yeah, I'm
trying to see the positives here, I really am