Scientists from GNS Science have found the 2016 7.8 ‘Kaikoura earthquake’ that hit New Zealand has caused the North and South islands to move closer to each other. The Kaikoura earthquake was one of the most complicated earthquakes in the world. Geologists believe such events occur only once every 5,000-10,000 years it caused rupturing of at least 25 fault lines across the country.

For more info, please read the original article by V3:
https://www.v3.co.uk/v3-uk/news/3067003/2016-earthquake-brought-new-zealands-north-and-south-islands-closer-together