Waveform inversion for localized 3-D seismic velocity structure for in lowermost mantle

2015 Fiscal Year Final Research Report

• Project/Area Number: 25400442
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Solid earth and planetary physics
• Research Institution: The University of Tokyo
• Principal Investigator: Geller Robert 東京大学, 理学(系)研究科(研究院), 教授 (40170154)
• Co-Investigator(Renkei-kenkyūsha): KAWAI Kenji 東京大学, 総合文化研究科, 助教 (20432007)
• Project Period (FY): 2013-04-01 – 2016-03-31
• Keywords: 地震波形インバージョン / 地球内部構造

Outline of Final Research Achievements

To reveal seismic velocity structure of the mantle and its geophysical mechanism, our group develop a full-waveform inversion method for the localized structure of the lowermost mantle. In most cases only secondary data, which are extracted from the observed waveform data (e.g. traveltimes) are used in studies of earth structure.
On the otehr hand, our inversion method can handle waveform data themselves, rather than traveltime data. In this study, we modified our method to obtain more fine structures in the mantle, and infer 3-D localized shear velocity structure in the lowermost mantle beneath western pacific and central America.

Free Research Field

地震学