著者名,論文名,雑誌名,ISSN,出版者名,出版日付,巻,号,ページ,URL,URL(DOI) Göran Ekström and Geoffrey A. Abers and Spahr C. Webb,Determination of surface‐wave phase velocities across USArray from noise and Aki's spectral formulation,Geophysical Research Letters,0094-8276,American Geophysical Union (AGU),2009-09,36,18,L18301,https://cir.nii.ac.jp/crid/1360011144042900352,https://doi.org/10.1029/2009gl039131