2014-06-12-httpi.telegraph.co.ukmultimediaarchive02551fuji_2551323bJAPAN – The earthquake that sparked a devastating tsunami that killed thousands in Japan in 2011 has caused pressure to build under active volcano Mount Fuji. While Japan’s highest mountain has not erupted since 1707, scientists say the build-up of pressure caused by the magnitude-9 Tohoku-Oki earthquake has left Mount Fuji in a “critical state.” The research was carried out by scientists at the Institute of Earth Sciences in Grenoble, France, with their Japanese counterparts. It used records from 800 seismic sensors that recorded data after the earthquake to map geological disturbances in fluid in the earth’s crust, caused by seismic waves. “Our work does not say that the volcano will start erupting, but it does show that it’s in a critical state,” Dr Florent Brenguier, lead author of the publication, told The Guardian. Dr Brenguier said seismic waves travelled a long way around the world several times. “Their movement makes the earth’s crust vibrate and, rather like a shock wave, this produces breaks or cracks in the rock.” More