! Crustal amplification filter file
12               ! nfrequencies
    0.0001 1.00  ! frequency, amplification
    0.01   1.00  ! This is the Atkinson and Boore (2006)
    0.09   1.10  ! ENA hard rock amplification.
    0.16   1.18
    0.51   1.42
    0.84   1.58
    1.25   1.74
    2.26   2.06
    3.17   2.25
    6.05   2.58
    16.6   3.13
    61.2   4.00