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 […]
Dave Petley
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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 […]
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The 19 June 2025 landslide at the Rubaya mining site in the Democratic Republic of Congo
A major slope failure killed many people, possibly over 300, in an area of unlicenced mining of the mineral Coltan. On 19 June 2025, a very significant landslide occurred at the Rubaya mining site in Masisi territory, North Kivu, which is located in the eastern part of the Democratic Republic of the Congo (DRC). The […]
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Landslides during periods of glacial retreat in Alaska
An excellent new paper (Walden et al. 2025) examines the occurrence of accelerated movement in rock slope landslides in Alaska as adjacent glaciers melt. The exceptional temperatures in recent days in both North America and Europe has once again highlighted the rate at which the climate is changing in response to anthropogenic increases in greenhouse […]
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The 24 June 2025 landslide at Granizal near to Medellín, Colombia
A major landslide has occurred in the vicinity of Altos de Oriente and Manantiales, near to Medellín and Bello, in Colombia. It is believed that about 25 people died. On 24 June 2025 at 3:20 am, a large landslide occurred in the vicinity of Altos de Oriente and Manantiales, near to Granizal in Colombia. At […]
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The 24 June 2025 landslide at Houzihé Grand Bridge in Guizhou, China
A significant landslide has destroyed a major bridge on the Xiarong Expressway in Guizhou, China. On 24 June 2025, intense rainfall triggered a significant landslide at the site of the Houzihé Grand Bridge, which is a part of the Xiarong Expressway (a key road that is also known as Xiamen–Chengdu Expressway (route G76). The landslide […]