The collision of India with the rest of Asia has led to seismic activity throughout Western China, particularly in Tibet and the Yunnan, Xinjiang, Sichuan, Gansu and Qinghai provinces.
However, these regions in comparison with Eastern China have a low population density.
These areas also in general have poorer transport and building codes.
Throughout China, poor building codes increases the damage and loss of life from earthquakes.
This earthquake had a prominent series of foreshocks and authorities who were eager to issue a warning.