why do earthquakes happen?
Earthquakes usually happen when rock underground breaks along a fault. This fast release of energy causes the seismic waves that make the ground shake. When two blocks of rock are rubbing against each other, they rock don’t just move smoothly they stick to each other also. The rocks are still pushing against each other, but not moving. After a little bit, the rocks break because of all the
pressure that's been built up. When the rocks break, the earthquake occurs. During the earthquake and afterward, the blocks of rock start moving, and they don’t stop moving until they get stuck again. The spot underground where the rock breaks is called the focus of the earthquake. The place right above the focus is called the epicentre of the earthquake.
pressure that's been built up. When the rocks break, the earthquake occurs. During the earthquake and afterward, the blocks of rock start moving, and they don’t stop moving until they get stuck again. The spot underground where the rock breaks is called the focus of the earthquake. The place right above the focus is called the epicentre of the earthquake.