Hawaii isn't the only series of islands formed from underwater volcanic eruptions. In 2014, a massive eruption formed the new island of Hunga Tonga-Hunga ... southeast of Fiji in the Pacific.

TOKYO -- A strong 7.1 magnitude earthquake hit near Tonga, prompting a tsunami warning for the Pacific island country. The U.S. Geological Survey said the temblor hit about 100 kilometers (62 ...