The Earthquake Early Warning (EEW) (緊急地震速報 Kinkyū Jishin Sokuhō) is a warning issued just after an earthquake in Japan is detected.[2]
The warnings are issued mainly by the Japan Meteorological Agency (JMA), and they issue tips on how to react to the warnings.[3][4]
The JMA has two Earthquake Early Warning schemes; one is for advanced users, another for the general public.[8]
The timing of a warning depends on conditions when a warning can be
issued and received. After receiving a warning, a person may have a few
seconds or in some cases significantly longer to take action, but if the
epicenter is very close there may be cases in which strong tremors come
ahead of any warning.[10]
The Earthquake Early Warning is set up to enable people to mitigate
damage from an earthquake: people may protect themselves at home, at the
office, and near cliffs. Railway workers may use this warning to slow
down trains, and factory workers may use it to stop assembly lines prior
to an earthquake.[2]
Format of EEW broadcasts: Television, Mobile phone networks, Radio, Internet.
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