Scratch due to the earthquake, Quakes recorded on the torpedo

This site displays scratch marks and abrasions carved into the rock surface during an earthquake, showing how geological layers shifted violently beneath the ground. The visible scars extend across the exposed rock face, revealing the exact path of movement.

The area was marked by the November 1930 earthquake, which activated the Tanna Fault and carved deep scratches into the rock. These marks have remained unchanged since, preserving a record of the earth's movement.

Japanese scientists and researchers examine these geological formations to understand the patterns of tectonic movements in the Izu Peninsula region.

The location is accessible from outside and offers direct views of the scratches on the rock face. Information signs nearby help explain the geological features and the impact of seismic forces.

The scratches act like a natural archive, capturing the exact moment when the earth deformed under enormous force. For geologists, these marks are invaluable because they show how rock layers slip past each other.

Location: Izunokuni

Inception: November 26, 1930

GPS coordinates: 35.05458,138.93368

Latest update: December 9, 2025 12:22