Lessons learned from the Wenchuan earthquake: their application for the Tien Shan
One of the lessons learned from the catastrophic Wenchuan earthquake is that extremely strong event has occurred first time within peoples memory in the region with the millennia-long seismic record. It clearly shows that extreme events that can occur in favorable seismotectonic conditions should be considered for seismic hazard and slope stability assessment irrespective of presence or absence of similar phenomena in the historical past. This lesson must be applied to the Tien Shan where most of strong earthquakes, both historical and instrumentally recorded occurred along the northern and southern boundaries of this mountain system, while its central part have no record of such events in the past. However, this record hardly extends for 200 years. At the same time Central (Inner) Tien Shan is extremely rich of surface ruptures, rockslides and other features that can be interpreted as geological traces of strong past earthquakes. It highlights the urgent need of its long-term seismic hazard reassessment, moreover several large hydraulic projects are proposed and implemented here. Possibility of a very strong earthquake occurrence should be considered both for dams design and for the reservoir slopes stability assessment.
A.L.Strom
Institute of Geosphers Dynamics of Russian Academy of Sciences, Moscow
国际会议
香港
英文
1-5
2009-05-19（万方平台首次上网日期，不代表论文的发表时间）