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The advance of the Chung Khumdan glacier - a tributary of the Shyok, had formed an ice dam. The 1929 outburst flood of Chung Khumdan glacier was monitored from near the glacier for over 1`500 km downstream. Gunn (1930) estimated the reservoir to have contained almost 1350 Mio m3. Some 300`000 m3 of ice were also carried by the flood and stranded on large blocks in the valley below the dam. At the peak of the steeply rising and falling flood, water discharges in excess of 22`650 m3/s were indicated, which is the largest discharge ever measured for the entire upper lndus at Attock.
Mool, P. K., Bajracharya, S. R., Roohi, R., Ashraf, A. (2003):
The only information available for 1926, 1929, and 1932 Khumdan outbursts is that breaching began through subglacial tunnels, but then carried away the entire thickness of ice above (Khan 1994).