震しん源げん時じ

noun

origin time (of an earthquake)

Technical term used in seismology to denote the time at which an earthquake originates at its focus.

• 気き象しょう庁ちょうは地じ震しんの震しん源げん時じを速そく報ほうで発はっ表ぴょうした。

  The Japan Meteorological Agency announced the earthquake's origin time in a prompt report.