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.
The Rayleigh wave EncyclopÃ¦dia Britannica, Inc. earthquakes: types of seismic waves Seismic waves travel in different patterns and at different speeds through the Earth. The most damaging are the surface typesâthe Love waves and the Rayleigh waves. EncyclopÃ¦dia Britannica, Inc. Learn about this topic in these articles: characteristics. In seismic wave â¦principal surface waves are called Rayleigh waves after the British physicist Lord Rayleigh, who first mathematically demonstrated their existence.