If a country can boast of one of the emergency warning systems of the world's most advanced Japan, developed from his experience as a seismic country and as a result of the traumatic experience of the devastating Kobe earthquake in the year 1995 ( that killed some 6,434 people).
Initially, the system started its implementation with the installation of a network over 4,000 seismic sensors throughout the country , with the ability to send real-time information to the Japan Meteorological Agency. The agency is responsible for processing data from these sensors and evaluate whether or not to send a public warning.
Using advanced technology developed specifically for this network of sensors, depending on the distance at which it is located on or sensors capable of detecting an earthquake of a certain level; respective warning notice may be sent a few seconds before a major earthquake.
From this moment is the Corporation Station in Japan or Japan Broadcasting Association (NHK), who is in charge of alerting the population (public broadcaster), for which advantage of the features incorporated in the digital TV standard ISDB-T developed precisely in Japan (in Latin America will use ISDB-Tb, similar to the Japanese standard but adapted by Brazil).
in fairly simple terms ISDB-T standard transmits digital signals divided into 13 segments, of which 12 are used for transmission of HDTV itself, while the segment 13 (commonly known as " 1 - Ins ") Allows the transmission of digital signals and alerts to mobile devices (cell phones, portable TVs, etc.)..
Thus when the Japan Meteorological Agency receives notice of such importance from its network of seismic sensors, transfers it instantly to the NHK network, who in turn sends a signal alert using this channel "1 - sec ", and is even able to turn those devices are off (in some TVs are a red light) .
Thus the residents of a particular place receive information from the earthquake magnitude, time of arrival of the waves, maps evacuation and in general, all information necessary for residents to react the best way the event is occurring.
addition to all the above NHK has several helicopters to broadcast live from around the country, plus more than 400 robotic cameras and transmission equipment that have allowed us to see directly the last earthquake in Japan.
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