Thousands of people have reported feeling a shallow 3.9 earthquake located just south of Christchurch this afternoon.
GeoNet has the quake at a depth of 7km. It struck 5km south-west of Christchurch at 1:49pm.
Over 10,000 people have reported feeling the earthquake.
People have been taking to Twitter to post about feeling the afternoon shake.
"I can't believe that was only 3.9 - It was big enough to climb under my desk for!" one user commented.
"We are all outside. That was intense!" said another.
GeoNet listed the earthquake as causing "moderate shaking".