LAYER

CRUST2.0 (38.5W,7.5S) (km/s)

ak135 (km/s)

iasp91 (km/s)

PREM (km/s)

Soft sediment

1.20

Hard sediment

2.10

Upper crust

3.60

3.46

3.36

3.20

Middle crust

3.60

Lower crust

3.80

3.85

3.75

3.90

Upper mantle

» 4.50

(from 35 to 210 km)

» 4.50

(from 35 to 210 km)

» 4.50

(from 24.4 to 115 km)