This was the first time that the fault scarp of a trench-type earthquake ... large as 80–120 m (the value depends on the assumed dip angle of the underlying fault) in the Japan Trench.

But perhaps part of the reason it's listed as such is the information is incomplete." A fault scarp is a steep slope that separates what previously was a relatively level area, and can be caused ...

"The dip angle of the sliding surface tends to be steep, often between 45–90 degrees," he says. "The Wasatch Fault plunges, toward the west, at a steep angle at the surface in the Salt Lake City ...