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.
What is it? A tsunami, or seismic sea wave, is a series of destructive and very dangerous waves that result from earthquakes or other types of disturbances such as volcanic eruptions, meteorite impacts, and landslides. Its waves can get up to 30 m (100 ft) tall--or as high as a 10-story building.sunamis are extremely deadly and can't be predicted, so they are rarely caught on camera and you won't have much time to react when you spot the first wave coming in. They can wipe out an entire population of people and bring a city down to its knees.