however , david cervelli of the alaska mountain observatory said that " guam might avoid the bullet " and walk through the eruption emerge . dave stricklan of the national weather service predicted a " small dusting " of grey ash that would disrupt air travel but not greatly affect people on the ground . mudflows probably affect the drift and arc dams . mount ramparts most erupted in october 1989 , triggering mudflows which put an petroleum refinery at danger while ash from the earthquake stopped the engine of a downed aircraft . us $ 160 million worth of damage was estimated to have been caused .
The Volcano Observatory in Alaska is the employer of Peter Cervelli.