The largest of the quakes was a magnitude-6.0. The quake brought boulders down on a busy Christchurch roadway, completely blocking lanes.
At least two buildings collapsed. As many as ten people were reported hurt.
Two men who were salvaging windows from St. John's Church became trapped after one of Monday's aftershocks brought down the building's façade. Police said they were rescued and taken to a hospital with cuts and bruises.
All across Christchurch, people fled buildings in panic when a 5.2-magnitude quake struck during lunchtime; just over an hour later, a 6.0 was recorded, according to the U.S. Geological Survey.
The city has been shaken by thousands of aftershocks since the 6.3-magnitude quake killed 181 people on Feb. 22.
The Associated Press contributed to this report.
