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9 February 2021

Potential Preconditioning for Landslide High 2020 Glacier Snow Lines in Rishi Ganga Basin, India 2020

The catastrophic landslide and resulting flood in the Rishi Ganga basin Uttarakhand, India on Feb. 7 was triggered on a formerly glaciated slope at 5600 m detailed in a blog post by Petley (2021). This event occurred after a post-monsoon season featuring high snowlines on adjacent glaciers and the warmest January in the last six decades  in Uttarakhand, India.   Glacier snowlines are a proxy for the elevation where melting predominates, were these preconditioning factors? Here we examine the elevation of the glacier snowlines in 2020.

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