The Hattian Bala rock avalanche and associated landslides triggered by the Kashmir Earthquake of 8 October 2005

Stuart Dunning, Wishart Mitchell, Nicholas Rosser, David Petley

Research output: Contribution to journalArticlepeer-review

170 Citations (Scopus)

Abstract

The Kashmir Earthquake of the 8 October killed an estimated 87 350 people, 25 500 through co-seismic landslides. The largest landslide associated with the earthquake was the 68 × 106 m3 Hattian Bala rock avalanche that destroyed a village and killed around 1000 people. The deposit blocks the valley to a depth of 130 m impounding a lake that reached the dam-crest in April 2007. An outburst flood now threatens a major settlement 3 km downstream. A series of space images reveals landslide clusters in the rock avalanche source area prior to the earthquake. The images also reveal a large slow-moving landslide with its toe in the lake, failure of this landslide may induce dam failure through overtopping and scour. Eighty five landslides in the Hattian Bala catchment predate the shaking of 8 October 2005, a further 73 are co-seismic with the main shock, and 21 postdate it in the period up to October 2006. Landslide magnitude–frequency distribution plots derived from satellite images allow an assessment of the contribution of seismically triggered events as compared to background rates of activity.
Original languageEnglish
Pages (from-to)130-144
JournalEngineering Geology
Volume93
Issue number3-4
DOIs
Publication statusPublished - 2007

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