noun
far-field tsunami; distant tsunami
Technical term used in seismology and disaster prevention for a tsunami originating far from the affected coast, especially one generated outside Japan.
遠地津波は、発生源が遠いため、到達までに時間がかかることが多い。
Because a far-field tsunami originates far away, it often takes time to arrive.
気象庁は遠地津波に関する情報を発表した。
The Japan Meteorological Agency issued information about a distant tsunami.
Compound of 遠地 (えんち, 'distant place') and 津波 (つなみ, 'tsunami').