Melting Ice Awakens Dormant Faults and Volcanoes — SkimNews
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- Bill McGuire, professor emeritus of geophysical and climate hazards at UCL, frames the Nepal and Tibet flood as part of a pattern linking climate-driven cryosphere loss to geological disasters — alongside the 2021 Uttarakhand flood that killed about 200 people and damaged two hydroelectric plants, an August 2025 Alaska fjord landslide that generated a 500-metre wave, and the 2025 glacier collapse that destroyed most of Switzerland's already-evacuated village of Blatten.
- Retreating glaciers and thawing permafrost expose unstable mountain slopes and feed expanding glacial meltwater lakes prone to breaching; about 200 glacial lakes across the Himalayan region alone have been diagnosed as threatening communities downslope.
- Alaska, one of the fastest-heating places on Earth, is already losing enough ice to reduce the load on active crustal faults and increase earthquake activity — a seismic backlash McGuire expects to repeat in the Himalayas, Andes, Greenland, and the European Alps.
- Greenland's ice cover (2km to 3km thick) has held faults beneath it locked for thousands of years, and McGuire says a future rise in earthquake activity is predicted as that load eases; Iceland's Vatnajökull retreat is forecast to stir volcanoes, recalling the aviation chaos of the 2010 Eyjafjallajökull eruption.
- McGuire notes the existence of a volcano "season" — more eruptions between November and April — tied to annual redistribution of water mass around the planet, illustrating how minuscule environmental shifts can produce disproportionate geological responses.
Why it matters: About 200 glacial lakes in the Himalayas already threaten communities downslope, and Alaska's ice loss is already reducing the load on faults and triggering earthquakes. McGuire flags Greenland (ice up to 3km thick) and Iceland as the next likely flashpoints — the 2010 Eyjafjallajökull eruption showed how disruptive an awakened Icelandic volcano becomes for UK and northern European aviation.
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