【摘要】 2014年8月3日云南鲁甸发生MS6.5地震,在震中及其周边地区分布的中国数字强震动台网的81个台站获取了这次地震的主震强震动记录。特别是位于极震区鲁甸龙头山镇财政所强震动台,完整记录到这次地震的地震动时程,其东西向PGA达948.5 cm/s2,该台站周边多栋多层建筑物底层完全倒塌和损毁,与记录所反映的强烈震动相吻合。初步分析强震动观测记录,讨论了本次地震的震中位置、破裂方向和强震动衰减速率等问题。更多还原

【Abstract】 A MS6. 5 earthquake occurred in Ludian County of Yunnan Province on Aug. 3,2014. The strong motion caused by the mainshock was recorded by 81 strong motion observation stations which are located around the epicenter and its adjacent area. Especially,the strong motion station which is located at Longtoushan Office of Finance in the meizoseismal area perfectly recorded the strong ground motion time history of the mainshock,and the PGA of it is 948. 5 cm ·s- 2in EW. The ground floors of many buildings around the Longtoushan strong motion stations damaged seriously or collapsed,which was consistent with the strong shock reflected in the recording. A preliminary analysis on the strong motion recordings were also done,based on these analysis,the problems about epicenter location,rupture direction and the attenuation of strong motion of Ludian MS6. 5 earthquake are also discussed.更多还原