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Large lahars hundreds of metres wide and tens of metres deep can flow several tens of metres per second (22 mph or more), much too fast for people to outrun. [9] On steep slopes, lahar speeds can exceed 200 kilometres per hour (120 mph). [9] A lahar can cause catastrophic destruction along a potential path of more than 300 kilometres (190 mi). [10]
This is the largest Grímsvötn glacial flood ever recorded. The Eyjafjallajökull volcano can cause jökulhlaups. The 2010 eruption caused a jökulhlaup with a peak flow of about 2,000 to 3,000 m 3 /s (71,000 to 106,000 cu ft/s). [15] [16] Work in Iceland has categorised jökulhlaups by origin and size.
Hours of heavy monsoon rains caused flash flooding at around 22:30 WIB (15:30 UTC) on 11 May, exacerbated by a lahar from Mount Marapi. [1] [2] The rains also caused a river to overflow and flood villages in four districts. [3] The lahar swept down Mount Marapi, carrying a wet mixture of ash and rocks. It buried homes and swept some residents ...
The worst floods to hit central Europe in at least two decades have left a trail of destruction from Romania to Poland, spreading mud and debris in towns, destroying bridges, submerging cars and ...
Another factor that may be contributing to the severe floods, however, is human activity and land-use change. Because most of the recent floods in Central Europe are river floods, says Bates, it ...
Spain’s Mediterranean coast is used to autumn storms that can cause flooding, but this was the most powerful flash flood event in recent memory. Scientists link it to climate change, which is ...
In Poland, most of the commercial risk is covered, but only a small fraction of homes and autos carry flood coverage. Verisk’s loss estimates include insured physical damage to property (residential, commercial, industrial, auto, agriculture), both structures and their contents, from both on- and off-floodplain flooding.
The lahars can coat objects, wash objects away and can knock objects down by their force. Lahars, debris flows and mudflows that travel into a river or stream run the potential for crowding the waterway, forcing the water to flow outward and causing a flood. The volcanic matter could also pollute the water, making it unsafe to drink. [citation ...