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The 300-by-700-metre (980 ft × 2,300 ft) quick clay landslide wrecked several houses and killed 10 people. [15] [14] On 23 September 2023, near the town of Stenungsund, Sweden, an area of c. 15 hectares (37 acres) was affected by a quick clay landslide, which among other things damaged the E6 motorway between Gothenburg and Oslo. [16]
Just before midnight, the clay finally stopped flowing and began to resolidify. By the time the landslide had ended, 41 homes had been destroyed and 31 people had been killed. The landslide created a crater of approximately 324,000 square metres (3,490,000 sq ft) in area, varying from 15 m (49 ft) to 30 m (98 ft) in depth.
Quick clay, known as Leda Clay in Canada, is a water-saturated gel, which in its solid form resembles highly sensitive clay. This clay has a tendency to change from a relatively stiff condition to a liquid mass when it is disturbed. This gradual change in appearance from solid to liquid is a process known as spontaneous liquefaction.
The area surrounding Stenungsund is prone to quick clay landslides, with several large landslides occurring in the area in the past. [7] Göran Sällfors [], Professor Emeritus of Geology and Geotechnics at Chalmers University of Technology, identified a similarity to a landslide that occurred in 2006 approximately 50 kilometres north in Småröd [], with the cause being "large amounts of ...
Across Ecuador, storms caused other landslides and flooding in at least 13 provinces, destroying some bridges and highways, severing the main road connecting Ecuador’s highlands to its Amazonian ...
"Landslide movement continues to manifest at the ground surface in the form of scarps, fissures, grabens/sinkholes, tensional cracking, shear zones and thrust features," the city's latest report ...
In his latest report, he noted that the landslide continues to affect new areas, moving in some spots as much as 13 inches a week. For decades, most areas saw movement closer to a few inches a ...
Large deposits of a material commonly known as Leda clay also formed. These deposits become highly unstable after heavy rains. Numerous landslides have occurred as a result. The former site of the town of Lemieux, Ontario collapsed into the South Nation River in 1993. The town's residents had previously been relocated because of the suspected ...