People in the northern South Island and southern North Island felt a 4.7 earthquake centred in Marlborough last night.
The quake struck shortly before 8pm, in the St Arnaud Range south-west of Blenheim.
Registered at a depth of 57km, it's described on the government's GeoNet website as a 'light' tremor.
Some 2700 people have made 'felt it' reports to the site, most describing weak or light shaking, but a few described it as strong or severe.