The October 7, 2014 M 6.0 earthquake in the southwest of Weiyuan, China, in the southwestern
of Yunnan Province, occurred as the result of shallow strike-slip faulting within the crust
of the Eurasia plate, in the broad plate boundary region between the India and Eurasia
plates. Tectonics here are controlled by the convergence of the India plate with Eurasia,
which has driven the uplift of the Himalayas to the west of this earthquake, and has caused
the formation of numerous intraplate continental transform structures in the surrounding region.
The pattern of elastic-wave radiation from the earthquake is consistent with the shock occurring
either as the result of right-lateral faulting on a northwest-trending fault or as the result of
left-lateral faulting on a northeast trending fault. Faults of both types have been mapped in
southwestern Yunnan, and it is unclear at this time which type of fault hosted this event. At the
latitude of the October 7 earthquake, India moves northeastward with respect to Eurasia at the rate
of approximately 51 mm/yr. Strong earthquakes are reasonably common in the Yunnan province, and
the bordering countries of Myanmar and Laos.