Some Features of Earthquakes Distribution Around Peking and Crustal Buckling

Summary

The large spatial distribution of the activity of strong earthquakes is a characteristic feature. Strong earthquakes occurred in recent years in China are located essentially along the two boundary lines of a stripe, and obviously distribute themselves at equal distance span. We found that before or after each earthquake (M ≥ 8),another earthquake (M≥7.5) generally occurred at a definite distance away. The distance span has two predominant distributions, one at a shorter distance of 480 -550 km, the other at a longer distance of about 1100 km. We have the tentative opinion that the character of earthquakes distribution is controlled by crustal buckling.