After the explosion , troops were moved Motion through the area ( which was now covered in up to a metre of leaf litter ) , to test Testing their ability to transit Motion across the debris .

Initially , the earthquake Catastrophe caused Causation sinking Motion of part of Honshu 's Pacific coast by up to roughly a metre , but after about three years , the coast rose back and kept on rising Self_motion to exceed Cause_change_of_position_on_a_scale its original height .

Some huts were shifted Motion by about 0.5 metre .

A tsunami Catastrophe of 1 metre high was reported Reporting .

In Harbin , the levels of PM particulate matter rose Cause_change_of_position_on_a_scale to 1,000 micrograms per cubic metre , worse than Beijing 's historic highs .

In Changchun , air pollution recorded Recording at an all-time high and the levels of PM particulate matter rose Cause_change_of_position_on_a_scale to 845 micrograms per cubic metre on 22 October 2013 .