In British Columbia a CAN$115 million project is almost complete to mitigate the risk posed by debris flows to the town of Squamish. Upstream of the town of Squamish in British Columbia, Canada, an extraordinary project is underway to mitigate the risk of debris flows. Known as the Cheekeye Debris Barrier Project, the scheme involves […]
North America
Posted inThe Landslide Blog
The 10 August 2025 landslide and tsunami at Tracy Arm fjord in Alaska
A wonderful new paper on the huge Tracy Arm landslide and tsunami will have profound but challenging implications for the management of risk in an age of increased tourism and rapid climate change. The journal Science has published an excellent new paper (Shugar et al. 2026) that examines the extraordinary 10 August 2025 landslide and […]
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The 19 March 2026 landslide on Interstate 5 near Bellingham in Washington State, USA
Post based on material kindly provided by Professor Douglas H. Clark of the Geology Department at Western Washington University. Many thanks to Doug for providing this information. On 19 March 2026, a c.2000 cubic metre rockslide blocked the northern bound lanes of Interstate 5 near to Bellingham, WA. The road will not fully reopen until […]
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Alaska’s Wildfires Heat the Planet, but Canada’s Cool It
Using 2 decades of satellite data, researchers learned that wildfires in North America don’t follow the same script: In western Canada, snow reflectivity drives a cooling effect, whereas in Alaska, permafrost burning leads to net warming.
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A renewed phase of movement at the Portuguese Bend Landslide Complex in Rancho Palos Verdes
Heavy winter rainfall has triggered further movement at this infamous landslide site in California, causing damage to properties and infrastructure The Portuguese Bend Landslide Complex in Rancho Palos Verdes in California frequently makes news headlines as phases of movement cause property damage. California has suffered a wet winter, which has driven a new phase of […]
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The 17 December 2024 Takhini River landslide and river-ice tsunami, Whitehorse, Yukon, Canada
A major slope collapse in frozen sediments in Canada highlights the role of progressive failure. Back in January of this year, I posted fascinating a piece by Derek Cronmiller of the Yukon Geological Survey about the 17 December 2024 Takhini River landslide and river-ice tsunami, which occurred in Whitehorse, Yukon, Canada. The location of this […]
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Move Over, Beavers. Dinosaurs Might Also Have Been Nature’s Engineers
Late Cretaceous dinosaurs may have cut back vegetation, creating large floodplains. When the asteroid hit, those floodplains became forests, a new study argues.
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Updates from the Alaska Earthquake Center regarding the 10 August 2025 landslide
The location of this major event has now been identified. It was a major rock slope failure that ran out across the South Sawyer Glacier. The Alaska Earthquake Center has now provided a detailed update about the 10 August 2025 landslide that occurred in the area of Tracy Arm. This work has been led by […]
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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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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 […]