Early morning quakes shake Christchurch

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GNS Science has lowered the magnitude of an aftershock which struck Christchurch this morning from 4.6 to 4.2.

The 5.14am tremor was centred 10km south east of Christchurch at a depth of 8km, GNS Science said.

It was felt in Christchurch.

Meanwhile, a 3.4 magnitude tremor struck in the same area at 8.04am.

The quake was 7km deep and centred 10km south west of Christchurch, GNS said.

- NZPA