国際地震工学センター 世界の大地震の不均質断層モデルカタログの改良と更新

摘要

In order to maintain and improve the IISEE earthquake catalog for CMT, aftershock distributions, fault planes, and rupture processes for recent large earthquakes in the world, we have conducted the followings. First, we continuously updated earthquake information of the catalog. Second, we performed the following additional analyses: (1) aftershock distributions and fault planes for large (M≧7) earthquakes during 1976-1993 and events whose magnitudes are in the range between 7.0 and 7.1 that occurred since 1994, (2) temporal distributions of moment release for large 20 earthquakes, (3) multiple CMT solutions for 12 large earthquakes, (4) construction of a structural model for the 1994 far east off Sanriku earthquake and inversion for rupture process model using 2.5 finite difference synthetic waveforms for it, (5) earthquake magnitudes using duration of high-frequency energy radiation and maximum displacement amplitudes, (6) the special web pages for 12 large earthquakes including the 2011 Off the Pacific Coast of Tohoku Earthquake. Third, 3 examples of strong motion simulation using Stochastic Green's function method are revised and 2 examples are added. They are used in a document explaining importance of studies of local and regional shear wave velocity structures. Fourth, we performed tsunami simulations for 13 large earthquakes, and tsunami waveform inversions for the January 2009 West Papua, Indonesia earthquake and the 2011 Off the Pacific Coast of Tohoku Earthquake. Finally, we implemented cross-reference function between the IISEE earthquake catalog and "Catalog of Damaging Earthquakes in the World", a function to export earthquake information to web calculator of PGA, PGV, intensities, etc., and a function to refer to results of tsunami simulations.%平成17～19年度に実施した研究開発課題「世界の大地震不均質断層モデルの構築及びカタログ作成に関する研究開発」において、1994年以降に発生したM7.2以上の地震について、建築研究所国際地震工学センターが推定した不均質断層モデル（震源メカニズム、余震分布及び断層面、震源過程）と他機関の地震情報からなる地震カタログを構築し、公開した。