Hawaii's Kilauea volcano could see explosive eruptions: U.S. agency

[Amishman]

5. Depends on how much goes, but the event 100k years ago put a 40 meter wave ashore in Australia

It would be indescribably bad for the entire Pacific.

100 to 1000 cubic miles of rock abruptly sliding into the sea would cause a wave well beyond anything seen in human history.

Very unlikely overall, but possible as Hawaii has done this several times before in geologic history, and the Hilina Slump is already unstable as it has been moving 10 cm per year. In 1975 it slid 11 feet and triggered a 47 foot tsunami