震しん央おう距きょ離り

noun

epicentral distance

Technical term in seismology; the distance from the epicenter to a given observation point.

• 震しん央おう距きょ離りが大おおきいほど、地じ震しん波はの到とう達たつ時じ間かんは遅おそくなる。

  The greater the epicentral distance, the later the arrival time of seismic waves.