Te Anau has been hit by a magnitude 5.2 earthquake, just a week after being jolted by a 5.9.
The latest quake, at 3:23pm on Saturday, was centred 35 kilometres north-west of the town at a depth of 102 kilometres, GeoNet said.
Felt reports showed more than 1400 people felt the shaking, mostly in the lower South Island.
There were no immediate reports of damage.
On 25 July a magnitude 5.9 earthquake struck 40 kilometres north of Te Anau, sparking a brief tsunami warning and an evacuation notice for some areas of the West Coast, which was later cancelled.
On Friday night, a magnitude 4.6 quake jolted the lower North Island and upper South at 11:09pm. It was centred 30 kilometres offshore, north-west of Porirua at a depth of 38 kilometres, and more than 8900 people logged Felt Reports.
GeoNet scientist Jonathan Hanson said New Zealand has been living up to its Shaky Isles reputation. While it had been a busy few weeks in terms of earthquakes, overall it was not unusual.
There are typically 15 to 20 magnitude five events in the country every year, but having a couple approaching magnitude six in a month is less common.
“These deep earthquakes are typically widely felt,” GeoNet wrote on Facebook on Saturday afternoon.
“Remember to Drop, Cover and Hold if you feel shaking, and know your tsunami evacuation route if you live near the coast.”