New research shows the blast triggered secondary gravity waves that rattled the upper atmosphere, where satellites orbit.

We have to look inside the earth. “Underwater volcanoes are capable of really big, really destructive eruptions," she says. "We are lulled into a sense of false security if you're used to small ...

Reader Ginger Johnson asked if the eruption could cause a tsunami ... Hatfield Marine Science Center. “The volcano is too deep, [about 1,500 meters underwater], and the kind of activity ...