What is the etymology of "Pasifika"?

What is the etymology of the term "Pasifika", which can mean the Pacific Islands, people of Pacific Island heritage (in a New Zealand context), or a festival held in Auckland about Pacific Island culture?

It's a New Zealand English term derived from the Samoan version of a Portuguese version of a Latin phrase.

From The New Zealand Herald

Pasifika is an odd term, and one gaining increasing currency outside the annual festival at Western Springs. Essentially, its the samoanisation of a Portuguese nod to the Latin phrase Mare Pacificum, or peaceful sea, so named by navigator Ferdinand Magellan.