Polar Motions caused by Great Earthquakes and Constrained by Plate Kinematics
We have updated the estimate of polar motion due to great earthquakes by using a linear visco-elastic model and using the latest information of centroid-moment tensor (CMT) catalog and obtain an average trend of 9.4 mm/year toward 121.7 deg.E for the past 40 years.Since 1978,the rates vary substantially from one decade to the other due to the fluctuations of the intensity of seismicity,ranging from 1.1mm/year from 1976 to 1993,5.2 mm/year from 1994 to 2003 and 26.7 mm/year in the past 11 years.Therefore four decades of instrumentation cannot provide reliable estimates of the average rate that we would expect over longer geological timescales.Furthermore,it does not account for slow earthquakes and fault creep.
Gabriele Cambiotti Roberto Sabadini David A.Yuen 王秀姣
Dept. of Earth Sciences,University of Milan Italy Dept. of Earth Sciences,University of Minnesota USA Langfang Branch,PetroChina Research Institute of Petroleum Exploration and Development Langfang 0650
国内会议
北京
英文
22-22
2015-10-11（万方平台首次上网日期，不代表论文的发表时间）