The Pacific plate on which the islands ride moves to the northwest, so in general the islands are older and bigger (due to erosion) as you move from southeast to northwest.
Ipuleti lasePacific iziqhingi ligibela kulo liya enyakatho-ntshonalanga, ngakho ngokuvamile iziqhingi zindala futhi zikhulu (ngenxa yokuguguleka) njengoba usuka eningizimu-mpumalanga uye enyakatho-ntshonalanga.