Uttarakhand became first Indian state to install a system to detect earthquakes and disseminate warnings. The first system has been installed in its capital Dehradun which will issue warnings 1-40 seconds before earthquakes of magnitude 5 or more occur.The system is designed and manufactured by Italian firm, Space Dynamics which already has installed it in Japan, Italy and US.The system is incorporated with sensors which are capable to detect P (Primary) and S (Secondary) waves generated during an earthquake. It is capable to detect the harmless P wave, which travels faster than the S wave for advance warning.