Fig. 2
Tan−1(\({\varPhi }\)2) of each site at various frequencies or periods (colored circles). The white contour lines represent with 2.5° width. The black and red triangles are the same as in Fig. 1
Fig. 2 | Earth, Planets and Space
Tan−1(\({\varPhi }\)2) of each site at various frequencies or periods (colored circles). The white contour lines represent with 2.5° width. The black and red triangles are the same as in Fig. 1