GNS Science said the 4.30pm quake was centred 20km deep, 20km south o' />

An earthquake measuring 4 on the Richter Scale has hit central Hawke's Bay.

GNS Science said the 4.30pm quake was centred 20km deep, 20km south of Porangahau.

It could have been felt in the Porangahau area.

- NZPA