a group of persons, as employees, charged with carrying out the work of an establishment or executing some undertaking. a group of assistants to a manager, superintendent, or executive. a member of a staff.
Seismic waves are the waves of energy caused by the sudden breaking of rock within the earth or an explosion. They are the energy that travels through the earth and is recorded on seismographs. Types of Seismic Waves. There are several different kinds of seismic waves, and they all move in different ways.
ATEP Â©2006-2008 UAF Geophysical Institute B-5 Seismic Waves Activity Procedure: 1. Explain students will study seismic waves. Seismic waves are waves that propagate through Earthâs interior. Much of what we know about Earth comes from study of seismic waves and how they travel through different materials. waves associated with earthquakes. Seismic waves can be classified into two major groups: body waves and surface waves. may be classified as compressional waves (P waves) or shear waves (S waves).