// cpt-city: gery/seismic (cpt)
//
// A scheme for amplitude values from seismic data, created with
// GMT from a grid file of amplitude values from a SEG-Y file
//
// author: Gery
// copyright: Public domain
// year: 2011
// url: https://phillips.shef.ac.uk/pub/cpt-city/gery
#declare seismic =
color_map {
  [0.00000 color rgbf <1.0000,0.1608,0.1608,0.0000>]
  [0.16032 color rgbf <1.0000,0.1608,0.1608,0.0000>]
  [0.16032 color rgbf <1.0000,0.4039,0.4039,0.0000>]
  [0.24302 color rgbf <1.0000,0.4039,0.4039,0.0000>]
  [0.24302 color rgbf <1.0000,0.5412,0.5412,0.0000>]
  [0.29624 color rgbf <1.0000,0.5412,0.5412,0.0000>]
  [0.29624 color rgbf <1.0000,0.6314,0.6314,0.0000>]
  [0.33421 color rgbf <1.0000,0.6314,0.6314,0.0000>]
  [0.33421 color rgbf <1.0000,0.6980,0.6980,0.0000>]
  [0.36343 color rgbf <1.0000,0.6980,0.6980,0.0000>]
  [0.36343 color rgbf <1.0000,0.7490,0.7490,0.0000>]
  [0.38728 color rgbf <1.0000,0.7490,0.7490,0.0000>]
  [0.38728 color rgbf <1.0000,0.7961,0.7961,0.0000>]
  [0.40761 color rgbf <1.0000,0.7961,0.7961,0.0000>]
  [0.40761 color rgbf <1.0000,0.8314,0.8314,0.0000>]
  [0.42562 color rgbf <1.0000,0.8314,0.8314,0.0000>]
  [0.42562 color rgbf <1.0000,0.8667,0.8667,0.0000>]
  [0.44206 color rgbf <1.0000,0.8667,0.8667,0.0000>]
  [0.44206 color rgbf <1.0000,0.8980,0.8980,0.0000>]
  [0.45739 color rgbf <1.0000,0.8980,0.8980,0.0000>]
  [0.45739 color rgbf <1.0000,0.9294,0.9294,0.0000>]
  [0.47191 color rgbf <1.0000,0.9294,0.9294,0.0000>]
  [0.47191 color rgbf <1.0000,0.9569,0.9569,0.0000>]
  [0.48606 color rgbf <1.0000,0.9569,0.9569,0.0000>]
  [0.48606 color rgbf <1.0000,0.9843,0.9843,0.0000>]
  [0.49945 color rgbf <1.0000,0.9843,0.9843,0.0000>]
  [0.49945 color rgbf <1.0000,1.0000,1.0000,0.0000>]
  [0.49959 color rgbf <1.0000,1.0000,1.0000,0.0000>]
  [0.49959 color rgbf <0.9882,0.9882,1.0000,0.0000>]
  [0.51321 color rgbf <0.9882,0.9882,1.0000,0.0000>]
  [0.51321 color rgbf <0.9608,0.9608,1.0000,0.0000>]
  [0.52733 color rgbf <0.9608,0.9608,1.0000,0.0000>]
  [0.52733 color rgbf <0.9294,0.9294,1.0000,0.0000>]
  [0.54192 color rgbf <0.9294,0.9294,1.0000,0.0000>]
  [0.54192 color rgbf <0.9020,0.9020,1.0000,0.0000>]
  [0.55725 color rgbf <0.9020,0.9020,1.0000,0.0000>]
  [0.55725 color rgbf <0.8706,0.8706,1.0000,0.0000>]
  [0.57377 color rgbf <0.8706,0.8706,1.0000,0.0000>]
  [0.57377 color rgbf <0.8353,0.8353,1.0000,0.0000>]
  [0.59190 color rgbf <0.8353,0.8353,1.0000,0.0000>]
  [0.59190 color rgbf <0.7961,0.7961,1.0000,0.0000>]
  [0.61241 color rgbf <0.7961,0.7961,1.0000,0.0000>]
  [0.61241 color rgbf <0.7529,0.7529,1.0000,0.0000>]
  [0.63642 color rgbf <0.7529,0.7529,1.0000,0.0000>]
  [0.63642 color rgbf <0.6980,0.6980,1.0000,0.0000>]
  [0.66584 color rgbf <0.6980,0.6980,1.0000,0.0000>]
  [0.66584 color rgbf <0.6314,0.6314,1.0000,0.0000>]
  [0.70433 color rgbf <0.6314,0.6314,1.0000,0.0000>]
  [0.70433 color rgbf <0.5373,0.5373,1.0000,0.0000>]
  [0.75848 color rgbf <0.5373,0.5373,1.0000,0.0000>]
  [0.75848 color rgbf <0.4000,0.4000,1.0000,0.0000>]
  [0.84166 color rgbf <0.4000,0.4000,1.0000,0.0000>]
  [0.84166 color rgbf <0.1569,0.1569,1.0000,0.0000>]
  [1.00000 color rgbf <0.1569,0.1569,1.0000,0.0000>]
}