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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 30 km to Izu City in Japan. It was responsible for the magnitude 7.0 1930 North Izu earthquake (北伊豆地震).

References

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v t e Tectonic plates of East and North Asia (Eurasian plate-Pacific plate Convergence Zone)
Large	Amur plate Okhotsk plate Philippine Sea plate Yangtze plate
Small	Mariana plate Okinawa plate Philippine Mobile Belt
Faults and rift zones	Aomori Bay West Coast Fault Zone Baikal Rift Zone Haiyuan Fault Fukozu Fault Futagawa-Hinagu fault zone Idosawa Fault Itoigawa-Shizuoka Tectonic Line Izu–Bonin–Mariana Arc Japan Median Tectonic Line Longmenshan Fault Neodani Fault Nojima Fault Northeastern Japan Arc Philippine Fault System Senya Fault Tanna Fault Ulakhan Fault Urasoko fault
Trenches and troughs	Kuril Trench Mariana Trench Japan Eastern margin of the Sea of Japan Izu–Ogasawara Trench Japan Trench Nankai Trough Okinawa Trough Ryukyu Trench Sagami Trough Suruga Trough Philippines Manila Trench Philippine Trench
Others	Boso triple junction