I want to know the answer to the following question:
Besides the population density, what else contributed to the severity of the quake?
All the background I'm provided with is that "Teruyuki Kato, a seismologist at the University of Tokyo, said that the seismic waves of the quake traveled a long distance without losing their power because of the firmness of the terrain in central China.". Is that enough to answer the question?
Answer: no