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Hunga Tonga-Hunga Ha’apai’s blast felt ‘round the world

Tags: Tonga, volcanic eruption

On Jan. 15, 2022, one of the past century’s most violent eruptions occurred, providing scientists the opportunity to explore aspects of relatively rare, but terribly violent, volcanic blasts that occur under the ocean.

Clocking a speeding glacier reveals the fate of a disappearing lake

Tags: GPS/GNSS, Greenland

The metaphor of a “slippery slope” is often invoked for things that might quickly get out of control, but in glaciology these words can be applied more literally. In a warming world, we want to know how quickly ice sheets can melt and raise sea level.

Scientists spy salty groundwater system beneath Antarctic ice stream

Tags: Antarctica, magnetotelluric, seismic imaging

Antarctica’s ice sheets are on the move, with the solid ice flowing toward the surrounding oceans. This exodus toward the coasts, explains Paul Winberry, a seismologist at Central Washington University, is enabled by fast moving ice streams—regions where liquid water located at the interface between the ice and underlying subsurface facilitates an ice sheet’s seaward slide.