noun
earthquake source fault; seismogenic fault
Technical term in seismology referring to the fault that directly generates an earthquake.
震源断層の位置を特定するために、余震の分布が調べられた。
The distribution of aftershocks was investigated to locate the earthquake source fault.
Compound of 震源 (shingen, 'seismic center') and 断層 (dansō, 'fault').