2 jul. 2015

Collapsing Glaciers Causing Massive Earthquakes in Greenland

As Greenland's glaciers melt, gigantic chunks of ice are breaking off. They are so large that they are causing powerful earthquakes as they tumble into the ocean.

The team of researchers from Swansea University in the UK, the Lamont-Doherty Earth Observatory at Columbia University, and a number of other institutions, studied GPS data from Greenland's fast-moving Helheim Glacier, and the glacier's calving front, where icebergs break off into the ocean, and correlated this with seismic data for earthquake timings. They found that large earthquakes, in the 4.6 to 5.2 range, are generated when billion-ton ice sheets break off from the glacier's forward face.

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