Yesterday, on Tuesday February the 22nd, a 6.3 magnitude earthquake happened in Christchurch at 12.51pm. Many buildings collapsed, and people were trapped in buildings and sustained serious injuries.
An earthquake is when the plates rub together.
It became very dark because dust from crumbling bricks, meaning that people could not see anything.
Heroes and rescuers found some of the people trapped under buildings that had been crushed. It was very sad when the people were buried inside.