On 21 July 2025, a very large rock avalanche occurred in the mountains of Hualien County, Taiwan. Initial measurements suggest that this ran out over about 6 km. On 21 July 2025, an extremely large rock avalanche occurred in the administrative area of Wanrong Township in Hualien Count in Taiwan. This event was detected on […]
The Landslide Blog
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The possible causes of the Dharali (Tharali) debris flow in Uttarakhand, India
A possible cause of the 5 August 2025 landslide is the failure of a large body of glacial material high in the valley above the village. The imagery that is emerging after the 5 August 2025 debris flow in Dharali (Tharali), in Uttarakhand, northern India make very somber viewing. Melaine Le Roy posted this comparison […]
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A very initial perspective on the 5 August 2025 debris flow at Tharali / Dharali in northern India
A massive landslide has destroyed a remote Himalayan village. Fifty or more people may have died. Astonishing and terrifying footage has appeared today of a dreadful debris flow that struck the village of Tharali (also called Dharali in some places) in Uttarakhand today. The video has been widely shared on social media. This is a […]
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The 15 July 2025 quick clay landslide at Portneuf in Canada
A quick clay landslide in the Quebec region has destroyed most of a farm and a local road. Over the next few days I will try to bring the blog up to date with some of the major landslides that have occurred whilst I have been on leave. To start, on 15 July 2025 an […]
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The inflow angle and channel gradient for large landslides
A new paper (Kharismalatri, Gomi & Sidle 2025) in the journal Natural Hazards uses the concepts of the inflow angle and the channel gradient to examine the behaviour of large landslides after failure. Large landslides in areas with steep terrain that either block the valley or turn into a long runout debris flows are an […]
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Movement of the Joshimath landslide in India
A new paper (Dalal et al. 2025) in the journal Engineering Geology examines movement of a major landslide complex in India. It shows that the slope reactivated in 2018, probably as a result of the loss of vegetation and poor management of water. Loyal readers will remember a series of posts that I made back […]
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The official report of the 24 June 2024 landslide at the Eagle Gold Mine heap leach facility
The Independent Review Board has released its report into a 6 million cubic metre landslide in Canada. It indicates that an initial rotational failure triggered a flow slide that travelled 1,400 metres. On 24 June 2024, a very large landslide affected a heap leach facility (HLF) at the Eagle Gold Mine in Yukon, Canada. I […]
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The 8 July 2025 catastrophic flood at Rasuwagadhi in Nepal
Yesterday, catastrophic flood swept down the Bhote Kosi river through Tibet and Nepal. At least 28 people have been killed. There is speculation that this might have been a GLOF. On 8 July 2025, a catastrophic mudslide / flood suddenly struck the Rasuwagadhi border crossing point between Tibet and Nepal, causing extensive damage. The Himalayan […]
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Fatal landslides in April 2025
In April 2025, I recorded 41 fatal landslides that cost 107 lives. I’m somewhat behind with posting updates on global fatal landslides due to other workload pressures – please accept my apologies. Please be assured that I’m still collecting the data and that I will make a summary available as soon as I can. Somewhat […]
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The 22 November 1815 Gejer Bali disaster
A new paper (Faral et al. 2025) provides details of a seismically-triggered landslide cascade and tsunami that killed up to 12,000 people. On 22 November 1815, a very significant landslide disaster occurred in Bali, in what is now Indonesia, killing between 10,000 and 12,000 people. A very interesting new paper (Faral et al. 2025) in […]