A powerful earthquake struck Sunday just north of Christchurch, New Zealand — the city devastated by a deadly 2011 temblor, authorities said.
A tsunami was generated and the first waves hit the South Island's east coast, according to the country's Civil Defense agency.
The USGS said the latest quake, which struck about 57 miles northeast of Christchurch, was magnitude 7.8. However, Civil Defense put the strength at 5.6 and reported a series of aftershocks.
Some minor damage was reported in the capital, Wellington, over 120 miles away. There were no immediate reports of major damage or injuries in Christchurch but some social media users posted pictures of upturned furniture.
New Zealand sits on the "Ring of Fire," an arc of seismic faults around the Pacific Ocean where earthquakes are common.
In 2011, 185 people died in a quake that flattened many historic buildings in Christchurch .