The group velocity maps are presented as the percent deviation from
the average across each map. The average for each map in km/s follows.

Rayleigh:

20 s = 3.557 km/s
30 s = 3.802 km/s
40 s = 3.874 km/s
50 s = 3.887 km/s
60 s = 3.877 km/s
70 s = 3.857 km/s
80 s = 3.835 km/s
90 s = 3.813 km/s
100 s = 3.790 km/s
125 s = 3.740 km/s
150 s = 3.695 km/s
175 s = 3.656 km/s
200 s = 3.638 km/s


Love:

20     3.983
30     4.169
40     4.271
50     4.329
60     4.359
70     4.379
80     4.386
90     4.394
100    4.403    
125    4.416