Manned submersible finds a fault scarp of the 2011 Tohoku-oki megaquake in the Japan Trench
This vertical cliff consists of soft mud deposited on the Japan Trench bottom and was uplifted ~60 m by the 2011 megaquake. This was the first time that the fault scarp of a trench-type earthquake was observed and visually recorded. Credit: Niigata University
On September 4, 2022, Hayato Ueda, a geologist at Niigata University, boarded a submarine vehicle with pilot, Chris May, and took a dive into the Japan Trench within the…