Long-period seismic amplification in the Kanto Basin from the ambient seismic field
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- Marine A. Denolle
- Department of Geophysics; Stanford University; Stanford California USA
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- Hiroe Miyake
- Earthquake Research Institute; University of Tokyo; Tokyo Japan
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- Shigeki Nakagawa
- Earthquake Research Institute; University of Tokyo; Tokyo Japan
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- Naoshi Hirata
- Earthquake Research Institute; University of Tokyo; Tokyo Japan
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- Gregory C. Beroza
- Department of Geophysics; Stanford University; Stanford California USA
書誌事項
- 公開日
- 2014-04-04
- 権利情報
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- http://doi.wiley.com/10.1002/tdm_license_1.1
- DOI
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- 10.1002/2014gl059425
- 公開者
- American Geophysical Union (AGU)
この論文をさがす
説明
Tokyo, like many seismically threatened cities, is situated atop a sedimentary basin that has the potential to trap and amplify seismic waves from earthquakes. We study amplification in the Kanto Basin by exploiting the information carried by the ambient seismic field. We use 375 seismic stations from the high sensitivity seismograph network across central Honshu as virtual sources and 296 seismic stations of the Metropolitan Seismic Observation network shallow borehole seismometers within the basin as receivers to map the basin response. We find a linear relationship between ground motion and basin depth at periods of 2–10 s that could be used to represent 3-D basin effects in ground motion prediction equations. We also find that the strength of basin seismic amplification depends strongly on the direction of illumination by seismic waves.
収録刊行物
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- Geophysical Research Letters
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Geophysical Research Letters 41 (7), 2319-2325, 2014-04-04
American Geophysical Union (AGU)
