Articles | Volume 22, issue 10
Nat. Hazards Earth Syst. Sci., 22, 3309–3327, 2022
https://doi.org/10.5194/nhess-22-3309-2022
Nat. Hazards Earth Syst. Sci., 22, 3309–3327, 2022
https://doi.org/10.5194/nhess-22-3309-2022
Research article
13 Oct 2022
Research article | 13 Oct 2022

Pre-collapse motion of the February 2021 Chamoli rock–ice avalanche, Indian Himalaya

Maximillian Van Wyk de Vries et al.

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Alexandrov, O.: NeoGeographyToolkit/StereoPipeline, GitHub [code], https://github.com/NeoGeographyToolkit/StereoPipeline, last access: 12 October 2022. a
Allen, S. K., Cox, S. C., and Owens, I. F.: Rock avalanches and other landslides in the central Southern Alps of New Zealand: a regional study considering possible climate change impacts, Landslides, 8, 33–48, https://doi.org/10.1007/s10346-010-0222-z, 2011. a
Aryal, A., Brooks, B. A., Reid, M. E., Bawden, G. W., and Pawlak, G. R.: Displacement fields from point cloud data: Application of particle imaging velocimetry to landslide geodesy, J. Geophys. Res.-Earth, 117, F01029, https://doi.org/10.1029/2011JF002161, 2012. a
Barba-Sevilla, M., Baird, B. W., Liel, A. B., and Tiampo, K. F.: Hazard Implications of the 2016 Mw 5.0 Cushing, OK Earthquake from a Joint Analysis of Damage and InSAR Data, Remote Sens., 10, 1715, https://doi.org/10.3390/rs10111715, 2018. a
Behling, R., Roessner, S., Kaufmann, H., and Kleinschmit, B.: Automated Spatiotemporal Landslide Mapping over Large Areas Using RapidEye Time Series Data, Remote Sens., 6, 8026–8055, https://doi.org/10.3390/rs6098026, 2014. a
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On 7 February 2021, a large rock–ice avalanche occurred in Chamoli, Indian Himalaya. The resulting debris flow swept down the nearby valley, leaving over 200 people dead or missing. We use a range of satellite datasets to investigate how the collapse area changed prior to collapse. We show that signs of instability were visible as early 5 years prior to collapse. However, it would likely not have been possible to predict the timing of the event from current satellite datasets.
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