In what is being described as a once-in-a-millennium event, Tonga’s Hunga Tonga-Hunga Ha’apai volcano erupted on January 15, obliterating the island and generating a minor, yet deadly, tsunami. Before the eruption, Hunga Tonga-Hunga Ha’apai was a seamount with a peak that rose only 120 meters (390 feet) above the surface of the ocean; the smallread more