Jisho

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地震警報
Wikipedia definition
1. Earthquake warning systemEarthquake Early Warning redirects here. For the earthquake warning system in Japan, see Earthquake Early Warning (Japan). An earthquake warning system is a system of accelerometers, communication, computers, and alarms that is devised for regional notification of a substantial earthquake while it is in progress. This is not the same as earthquake prediction, which is currently incapable of producing decisive event warnings.
Read “Earthquake warning system” on English Wikipedia
Read “地震警報システム” on Japanese Wikipedia
Read “Earthquake warning system” on DBpedia

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