A magnitude-9.0 earthquake along the Nankai Trough off central and western Japan could kill as many as 6,700 people in Nagoya, 1.5 times the number previously estimated, the municipal government said Wednesday.

Nagoya, with a population of 2.27 million, also projected that 15,000 people would sustain injuries, assuming that the temblor occurs late on a winter night.

Aichi Prefecture forecast last May that Nagoya could see a death toll of 4,600 from a powerful quake, based on estimates from the central government.