© GNS ScienceThis GNS map shows the location of the 6.4 magnitude quake in red, with some of the first 'felt reports' it received from around the region.
A spate of strong earthquakes have struck the central South Island this morning.
Four quakes measuring between 6.4 and 4.1 in magnitude hit the Methven and Arthur's Pass area between 6.48am and 6.59am.
The first tremor, measuring 6.4, struck 35km north of Methven at 6.48am, GNS Science reported.
Did you feel it? Do you have photos or video to share? Email us here.The tremor, which was 11km deep, was classified as severe.
A southern police communications spokesman said they had not received any reports of damage.
Four minutes later at 6.52am, a second quake measuring 4.1 in magnitude rocked the region.
It was centred 30km west of Arthur's Pass and was 5km deep.
GNS classified the quake as strong.
At 6.58 a third quake, measuring 4.1 hit the same spot, GNS said.
It was 5km deep.
Then, a minute later at 6.59am, another strong quake hit the same location, measuring 4.2 in magnitude. It was also shallow, centred 5km deep.
Comment: USGS has the first earthquake as being 5.6. One wonders why USGS often has the same earthquakes recorded as being of lower magnitude than other more local geological surveys.