關東
地震風險：低
Gunma Prefecture 地震風險
Gunma is mostly inland mountains with limited exposure to trench earthquakes. However, active volcanoes (Kusatsu-Shirane, Asama) generate volcanic earthquakes with little warning, and the prefecture lies within the broader Kanto earthquake influence zone.
主要斷層・地震帶
Gunma has active volcanoes including Kusatsu-Shirane and Asama, where volcanic earthquakes can occur with little warning. The Northwest Kanto Plain Margin Fault Zone traverses the southern part of the prefecture. There is no direct tsunami risk in this landlocked prefecture.
主要斷層線
간토 평야 북서 연부 단층대