Ali Etminan - M.S. in Geotechnic engineering, structure &civil councilor in N.I.C.I.CO (National Iranian COPPER industries company

Earthquakes are usually caused when rock underground suddenly breaks along a fault. This sudden release of energy causes the seismic waves that make the ground shake. When two blocks of rock or two plates are rubbing against each other, they stick a little. ... When the rocks break, the earthquake occurs

Earthquake Risks , Geotechnical Engineering