noun
travel-time curve
Technical term in seismology and geophysics: a graph showing the relationship between the arrival time of seismic waves and the distance from the epicenter.
地震の震源距離は走時曲線から求められる。
The distance to the earthquake's hypocenter can be determined from the travel-time curve.
Compound of 走時 (travel time) and 曲線 (curve). The term is a direct calque from English 'travel-time curve'.