Secondary gravity waves are ripples in the atmosphere created when primary gravity waves, like those triggered by a volcanic ...

Even before the eruption, the volcano gave off subtle signals. A low-frequency wave, known as a Rayleigh wave, was detected ...

Ripples from the blast didn't just rattle land ... The volcano exploded underwater between the islands of Hunga Tonga and Hunga Haʻapai. It briefly bridged the water between the two uninhabited ...