Relief Map. Tanna Fault (right)Tanna Fault surface ruptureRavine of Tanna Fault viewed from N
Tanna Fault (丹那断層, Tanna Dansō) is a left lateral strike-slip fault which runs along the northeast side of Izu Peninsula south 30km to Izu City in Japan. It was responsible for the magnitude 7.0 1930 North Izu earthquake (北伊豆地震).