 exactly.&nbsp; KRAKENC
        runs about 3 times slower but is necessary for leaky mode
        computations or for including material attenuation in elastic
        media.&nbsp; Internally KRAKENC replaces elastic layers by an
        equivalent reflection coefficent. For this reason, you cannot
        use KRAKENC to look at fields within the elastic layers.</li>
      <li>KRAKEL&nbsp;&nbsp;&nbsp; Analogous to KRAKENC but also
        computes elastic displacements and stresses for elastic media.
      