seismic : Idioms & Phrases

Index

seismic disturbance

  • noun an instance of agitation of the earth's crust
    shock.
    • the first shock of the earthquake came shortly after noon while workers were at lunch
WordNet

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.
Webster 1913