The manu'a island is on the Samoan islands. The Samoan islands is found in America.
It also consists of three main islands Ta'u, Ofu and Olosega.
It has also a volcano doublet which I am now trying to work out what they are called!
There are 129 operating, 9 under construction, and 8 announced. the 9 & 8 under construction are: Vancouver British Columbia, kyiv Ukraine, Gilla valley Arizona, Gilbert Arizona, san Salvador el Salvador, Trujillo Peru, Tegucigalpa Honduras, Quetzaltenango Guatemala, Philadelphia Pennsylvania, Oquirrh Mountian Utah, Phonix Arizona, Manuas Brazil, Calgary Alberta, Cordoba Argentina, Cebu Philippines, Kansas City Missouri, and Rome Italy. I hope this helps you.