Several significant aftershocks have been recorded near Lyttelton since 5pm on Monday evening.
Most were centred 10km from the town.
The largest of 3.9 magnitude was recorded at 10.44pm.
Several significant aftershocks have been recorded near Lyttelton since 5pm on Monday evening.
Most were centred 10km from the town.
The largest of 3.9 magnitude was recorded at 10.44pm.