Two moderate earthquakes struck New Zealand overnight on Saturday - one off the southern coast of the South Island and the other in the Bay of Plenty.
The effects of the magnitude 5 earthquake south of Stewart Island were felt in Otago.
The tremor was centred 350km south-west of Halfmoon Bay just before midnight on Saturday.
It had a depth of 12km and was felt as far away as Mosgiel and Owaka.
Another moderate earthquake, measuring 5.5 on the Richter scale, struck 100km north of White Island early on Sunday.
It was felt at 6.38am on Sunday in Opotiki.
The tremor had a depth of 170km.