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New paper about “300 MW Baspa II — India's largest private hydroelectric facility on top of a rock avalanche-dammed palaeo-lake (NW Himalaya): Regional geology, tectonic setting and seismicity.”

by Erich Draganits, Bernhard Grasemann, Christoph Janda, Christian Hager and Alex Preh.

Inclined, tight folds overlain by undisturbed laminated sediments in Lake Sangla

This study characterizes the geological setting of 300 MW Baspa II, India's largest private hydroelectric facility which was built on top of a relict rock avalanche dammed palaeo-lake (Baspa Valley, NW Himalaya). The area is seismically active and mass-movements are common. At least 5 levels of soft-sediment deformation have been recorded in the exposed part of the lacustrine sediments of Sangla palaeo-lake. They are interpreted as seismites, indicating at least 5 earthquakes within 2495 ± 297 years strong enough to cause liquefaction. These observations extend the local seismicity record considerably into the past and indicate more and possibly stronger seismic events than might be expected from the instrumental measurements.

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