WHY IN THE NEWS?
Indian Institute of Technology in Roorkee (IIT Roorkee) launched an earthquake early warning (EEW) Mobile App for Uttarakhand.
Earthquake early-warning system will alert people regarding the onset of calamity on mobile application.
Where it will be set up?
With the support of Union Ministry of Earth Sciences, this initiative was earlier started as a pilot project for Garhwal region of Uttarakhand. Later, it was extended by the Uttarakhand government. Under the project, sensors had been installed in high terrains of Garhwal and Kumaon regions of Uttarakhand.
How EEW provides a warning?
Early warning system works on the basis of the speed of the seismic waves, that propagate after the release of stress from faults movement. Strong ground shaking is caused by shear waves. Shear waves travel at half speed as compared to primary waves and much slower than electromagnetic signals. EEW system uses these waves to generate warning.
Seismic data stream in the central server that has been established in EEW System laboratory. For data streaming, high-speed telecommunication is used and high-performance computers compute scenario projections. Central server processes receive data continuously on 24 × 7 basis. It issues warning to the public as and when detects that an earthquake of magnitude greater than 5 has occurred in earthquake-prone areas. Warning time differs with the distance of any location from epicentre of the earthquake.
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