欧洲中小震基岩水平向地震动衰减关系研究  

Attenuation Relationships for Horizontal Ground Motion on Rock of Small-moderate Earthquakes in Europe

作　　者：靳超宇[1] 俞言祥[1] 

机构地区：[1]中国地震局地球物理研究所北京市海淀区民族大学南路5号 100081

出　　处：《中国地震》2009年第2期170-177,共8页Earthquake Research in China

基　　金：国家科技支撑计划课题“强震危险区划关键技术研究”(2006BAC13B01)资助

摘　　要：大震与中小震之间的地震动衰减规律有所不同。本文使用了132条欧洲基岩水平向记录研究中小震地震动衰减规律。震级范围在地方震级4～6级，距离在震源距70km以内。本文得到了峰值加速度和5％阻尼比、周期0．04～4．00秒之间的加速度反应谱的衰减关系。通过与欧洲和美国西部地震动衰减关系对比，分析了在地震活动性不同的地区内，大震与中小震之间存在的差异有何不同。There are very significant differences between strong and small-moderate earthquakes, for example, the ground motion of small-moderate earthquakes attenuate more fast, transmit a smaller distance and have more high frequency components. We use 132 small-moderate horizontal recordings on rock in Europe to study the attenuation relationship. Local magnitudes are between 4 and 6, hypocenter distances are less than 70kin. We obtain the attenuation equations for PGA and 5 % damp SA at spectra periods between 0.04 and 4 seconds. We make comparisons between the attenuation relations of Europe and America, and then analyze the discrepancies between the strong and small- moderate earthquakes in different seismicity areas.

关 键 词：中小地震 地震动 峰值加速度 加速度反应谱 衰减关系 地震活动性 

分 类 号：P315[天文地球—地震学]