What was the most displacement caused by the earthquake?
According to a study by the China Earthquake Administration (CEA), the earthquake occurred along the Longmenshan fault, a thrust structure along the border of the Indo-Australian Plate and Eurasian Plate. Seismic activities concentrated on its mid-fracture (known as Yingxiu-Beichuan fracture). The rupture lasted close to 120 sec, with the majority of energy released in the first 80 sec. Starting from Wenchuan, the rupture propagated at an average speed of 3.1 kilometers per second 49° toward north east, rupturing a total of about 300 km. Maximum displacement amounted to 9 meters. The focus was deeper than 10 km.
The troops were reembarked and moved to the Bay of St. Lunaire in Brittany where, on 3 September, they were landed to operate against St. Malo; however, this action proved impractical. Worsening weather forced the two armies to separate: the ships sailed for the safer anchorage of St. Cast, while the army proceeded overland. The tardiness of Bligh in moving his forces allowed a French force of 10,000 from Brest to catch up with him and open fire on the reembarkation troops. A rear-guard of 1,400 under General Dury held off the French while the rest of the army embarked. They could not be saved; 750, including Dury, were killed and the rest captured.