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Canterbury has been shaken by three shallow earthquakes.
The largest, a magnitude 4.7 earthquake which struck at 1.30pm, had a depth of 11km and was located 20km southwest of Christchurch according to Geonet.
It was described in a tweet by musician Hayden East as "a long wobble with a hard jolt in the middle''.
It followed a magnitude 4.0 earthquake which struck near Lyttelton 15 minutes earlier.
It hit at a depth of 5km and was within 5km of Lyttelton - the epicentre of February's huge earthquake, GeoNet reported.
There was also a 3.1 magnitude in the area this morning, also at a depth of 5km.
Geonet says the earthquake was felt in mid-Canterbury.