Overview
- The space agency concludes the August 5, 2025 flash flood began with the sudden failure of an exposed ice patch of about 0.25 square kilometres in a nivation zone below the Srikanta Glacier above 5,200 metres.
- IMD records showed only light to moderate rainfall and satellite scans identified no upstream glacial lakes, ruling out a cloudburst and a glacial lake outburst flood.
- As the ice mass broke apart, meltwater, ice and debris rushed down a roughly 9 km, 2,500 m descent through steep, confined channels, entraining loose material into a short, high-energy debris flood.
- Optical imagery had revealed the exposed ice weeks earlier, and ISRO recommends systematic surveillance using radar satellites to see through monsoon cloud cover and support early alerts.
- Scientists note remaining uncertainties in precise volumes and discharge due to the absence of gauges and field surveys, calling for targeted ground verification and mapping of similar high-risk zones.