Glaciers may look solid and immovable from a distance, but much of their most important structural damage is hidden beneath the surface. A new study by researchers at ETH Zurich shows that a single fibre-optic cable can map fractures deep inside a glacier with a level of detail that would require hundreds of conventional seismometers. The technique, tested on Switzerland’s Gorner Glacier, revealed that more than eight percent of the ice at the m…
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