Abstract: The seismometric Brigade of Sichuan Seismological Bureau made a preliminary investigation on the digging trench at the Xialatuo site along the Luhuo fractured zone, where an earthquake (M = 7.9) occurred on Feb. 6, 1973. It was found that the house remains were buried at the depth of 0.4-2.2m and 1.9-3.58m respectively during the two historical events on Mar. 24, 1923 and Dec. 8, 1816. It is reported that there occurred three large earthquakes with an intensity scale of X within 158 years. The view that "the strong earthquake (intensity of X) cannot repeat at the same place" cannot be applied to the seismic zoning.Owing to the recurrence of great earthquakes, we have studied four groups of earthquake faults occurring in 1973, 1923, 1816 respectively.

摘要： 四川省地震局地震测量队在1973年2月6日炉霍7.9级地震破裂带上的虾拉沱场地进行了地面槽探。经初步考察,发现了因地震房屋倒塌的遗迹,它们分别埋深于0.9-2.2米及1.9-3.58米,推测是1923、3、24及1816、12、8两次大地震所致。因此,虾拉沱地区在158年间共发生了三次烈度为Ⅹ的地震。 由于多次大地震的重复发生,槽探中见到了间距5-10米的四组地震断层,它们分别为1973、1923和1816年地震形成的。