Development of Single-Station GMPE

2015 Fiscal Year Final Research Report

• Project/Area Number: 25560171
• Research Category: Grant-in-Aid for Challenging Exploratory Research
• Allocation Type: Multi-year Fund
• Research Field: Natural disaster / Disaster prevention science
• Research Institution: Hokkaido University
• Principal Investigator: TAKAI Nobuo 北海道大学, 工学(系)研究科(研究院), 准教授 (10281792)
• Project Period (FY): 2013-04-01 – 2016-03-31
• Keywords: 地震動予測式 / 擬似速度応答スペクトル / アウターライズ地震

Outline of Final Research Achievements

There were considerable residuals between the observed and predicted values. These residuals result from the site and source effects, because the previous attenuation formulae were constructed based on many site’s strong motion records from many earthquakes occurring at various source areas. In order to overcome the weakness of the previous attenuation equations, we proposed empirical ground motion prediction equations for a single site; we named these equations “Single-Site GMPE (SS-GMPE)”. We carried out a regression analysis with respect to MW for each site assuming the previously estimated internal attenuation for intraslab earthquakes. The residuals between the observed and predicted values were considerably decreased. We applied the SS-GMPE to earthquakes not used in the regression analysis and found the good correspondence of predicted and observed spectra.

Free Research Field

地震工学