Group velocity maps (January 1997)
 

Rayleigh 20 s 30 s 40 s 50 s 60 s 70 s 80 s 90 s 100 s 125 s 150 s 175 s

Love 20 s 30 s 40 s 50 s 60 s 70 s 80 s 90 s 100 s

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