The cheap sensor detecting landslides in India

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The cheap sensor detecting landslides in India
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Image copyright Reuters Image caption Landslides are common in India after heavy rains
Scientists now say they have developed a low-cost technology for detecting them, using a motion sensor commonly found in smartphones.
The device is currently being trialled in more than 20 locations in the Himalayan state of Himachal Pradesh, where landslides kill dozens of people every year.
But now scientists from the Indian Institute of Technology (IIT) in Himachal Pradesh’s Mandi district have found that with some modifications, it can be used as a low-cost early warning system for landslides.
It throws up a range of data that then allows us to track small displacements in soil which causes landslides,” Dr Dutt told the BBC’s Ayeshea Perera.
Due to the early warnings from small movements, detecting a landslide is easier than trying to detect an earthquake, which is more instantaneous with a very small warning corridor.
The device measures all these movements, and when it detects a significant displacement of earth which could result in a landslide, it emits loud noises and sends text messages to officials so that they can evacuate and stop vehicular movement to and around the area.
Image copyright AFP Image caption The new device helps to detect landslides
In Kutropi, in the state’s Mandi district, the device was able to successfully alert officials about an impending landslide.
Dr Uday told the BBC that they have managed to alert officials after using the device that a hill in the state’s Deode region needed to be monitored carefully as the soil movements indicated that the hill was at risk of sliding.
Dr Dutt says that state officials – who often have to deal with the tragic consequences of landslides – are excited about the technology.
At present, the device has managed to demonstrate enough of a lead time to allow officials to warn residents and motorists shortly before a potential landslide.
But Dr Dutt and Dr Uday want the technology to be more predictive than reactive

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