Ashim Sattar

The Sikkim flood of October 2023: Drivers, causes and impacts of a multihazard cascade On 3 October 2023, a multihazard cascade in the Sikkim Himalaya, India, was triggered by 14.7 million m3 of frozen lateral moraine collapsing into South Lhonak Lake, generating an ~20 m tsunami-like i...

3 octobre 2023: une crue dévaste la vallée de la Teesta (Sikkim) entraînant la disparition de 130 personnes. Une équipe internationale, conduite par Ashim Sattar @glacier-hazards.bsky.social, décrypte dans Science (doi.org/10.1126/scie...) la cascade de phénomènes qui a conduit à cette catastrophe.

This was a huge effort led by @glacier-hazards.bsky.social I am lucky to work w/ folks like @maxvwdv.bsky.social, @topotoolbox.bsky.social , @shahidyounis.bsky.social , @irfansalroo.bsky.social , @kristencook.bsky.social , @etienneberthier.bsky.social , @davepetley.bsky.social and others

Satellite image of the Teesta III dam and reservoir from September 23, 2023, before the GLOF

Satellite image of the Teesta III dam and reservoir from October 9, 2023, after the GLOF, showing extensive erosion and destruction of the dam

Hmm - not sure why my GIFs of @planet.com images aren't animating properly. Here they are as individual scenes.

Photograph showing automobiles and buildings buried under the sediments deposited by the flood cascade at Rangpo. Photo credits: Praful Rao

New paper today in @science.org focused on unraveling the chain of events that led to the 2023 Teesta disaster, which resulted in about 130 people either dead or missing in Sikkim, India. Short thread to follow. 🧪⚒️ doi.org/10.1126/scie...

The 3-4 October 2023 Sikkim GLOF Our new paper in the journal Science analyses the terrible landslide-triggered (GLOF) that struck India late in 2023.

Our new paper in Science (Sattar et al 2025) analyses the causes, process and impacts of the 3-4 October 2023 landslide-triggered GLOF along the Teesta River in Northern India. This was an amazing event - I've provided a summary of the research on the Landslide Blog:- eos.org/thelandslide...

Glad to share our paper published in the journal “Science” titled “The Sikkim flood of October 2023: Drivers, causes and impacts of a multihazard cascade.” www.science.org/doi/10.1126/...