Descending to the trenchs flooring at a depth of 7,500 meters, they experienced a 26-meter-tall near-vertical cliff on the eastern side of a ridge standing 60 meters tall.Previous bathymetric studies from the sea surface have actually revealed that the ridge did not exist in the past, and appeared just after the megaquake accompanied with a fault on its eastern flank. They attributed the excess fault slip in the trench to regional enhancement owing to the uneven leading surface area of the subducting Pacific plate, which modified the fault geometry and stability.Geological Impact and Tsunami GenerationThe 2011 megaquake resulted from the rupture and slip of the plate limit fault between the northeast Honshu Island of Japan (Okhotsk plate) and the subducting Pacific plate. Due to the fact that of excellent depths, no submersible lorries (neither manned nor from another location operated) had been able to access to the Japan Trench bottom.This study was the very first time to observe, aesthetically record, and exactly measure the topographic change (including fault cliff) in the trench by a single trench-type megaquake occasion.
Descending to the trenchs floor at a depth of 7,500 meters, they came across a 26-meter-tall near-vertical cliff on the eastern side of a ridge standing 60 meters tall.Previous bathymetric surveys from the sea surface have actually exposed that the ridge did not exist previously, and appeared simply after the megaquake accompanied with a fault on its eastern flank. They attributed the excess fault slip in the trench to regional enhancement owing to the unequal top surface of the subducting Pacific plate, which customized the fault geometry and stability.Geological Impact and Tsunami GenerationThe 2011 megaquake resulted from the rupture and slip of the plate boundary fault in between the northeast Honshu Island of Japan (Okhotsk plate) and the subducting Pacific plate. Due to the fact that of terrific depths, no submersible lorries (neither manned nor from another location operated) had actually been able to access to the Japan Trench bottom.This research study was the first time to observe, aesthetically record, and precisely determine the topographic change (consisting of fault cliff) in the trench by a single trench-type megaquake event.
