i think they monitor pressure waves somehow here is an interactive map, looks like some of them are picking up something https://www.ndbc.noaa.gov/obs.shtml?la

i think they monitor pressure waves somehow here is an interactive map, looks like some of them are picking up something https://www.ndbc.noaa.gov/obs.shtml?lat=13&lon=-173&zoom=2&pgm=tsunami https://www.ndbc.noaa.gov/obs.shtml?lat=13&lon=-173&zoom=2&p...