Fig 4 12 21 12 v3

log10(Sw)

1 0.9 0.8 0.7

Zb0 Zs0

0

Z b0 S w = = Z s0 S h

0.5

C0 K

−0.5

C0 L Dh

−1 −1.5

0.6 0.5

−2

0.4

−2.5

0.3 0.2 0.1 0 −2 10

−3

Northern California Coast Range, CA1 Coos Bay, OR2 Gabilan Mesa, CA3

−3.5

Oregon Coast Range, OR3 −1

10

0

Sh

10

1

10

−4