 The crater is one of few places in American Samoa where one can observe the more recent episodes of volcanism.The eruptions at ‘Aunu’u occurred at approximately the same time as the volcanism at Leala Shoreline in [[Taputimu, American Samoa|Taputimu]], while eruptions that formed [[Rainmaker Mountain]], [[Matafao Peak]], and the ridges of [[Vai'ava Strait]] are much older.‘Aunu’u Island has the only quicksand area in American Samoa, and also the territory’s only lake.