seismal

from WordNet (r) 3.0 (2006)

seismal
    adj 1: subject to or caused by an earthquake or earth vibration
           [syn: {seismic}, {seismal}]

from The Collaborative International Dictionary of English v.0.48

Seismic \Seis"mic\, Seismal \Seis"mal\, a. [Gr. seismo`s an
   earthquake, from sei`ein to shake.]
   Of or pertaining to an earthquake; caused by an earthquake.
   [1913 Webster]

   {Seismic vertical}, the point upon the earth's surface
      vertically over the center of effort or focal point whence
      the earthquake's impulse proceeds, or the vertical line
      connecting these two points.
      [1913 Webster]