What caused the catastrophic flood in Nepal and Tibet – and how does a glacier collapse?

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Hundreds of people have died in catastrophic flash floods in Nepal. Here’s what we know so far about what caused the disaster.

What caused the flooding in Nepal?

Nepal’s foreign minister, Shisir Khanal, told the country’s parliament on Wednesday that initial reports suggested the floods could have been caused by an earthquake in the ⁠area that triggered a landslide.

However, the US Geological Survey (USGS) subsequently said that a glacial collapse was responsible for the seismic event and for the flooding itself.

The USGS noted that the glacial collapse had registered as a magn...

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