Figure9-7 Extension and compression in the Kyushu region.
The directions of the two straight lines that cross each other in the figure are those of the maximum extension (or minimum compression; red) and the maximum compression (or minimum extension; blue). Also, the lengths of the straight lines are in proportion to the amount of the extension or compression.
[Compiled from data from Geographical Survey Institute and "Active Faults in Japan (Revised Edition)"]
A: The past approximately 100 years.
Extension is seen in a north-south direction from Beppu to the Shimabara Peninsula (Simabara Hanto) and surrounding areas. Extension is also seen in southern Kyushu.
B: The past approximately 10 years.
Extension is seen in southern Kyushu.