Photo: GNS Science There have been 15 aftershocks with a magnitude higher than four since 4.45am today. The biggest included a 5.4 magnitude quake which struck 125km east of Te Araroa at a depth of 12km just after 10.30am; and a 6.1 magnitude quake which hit at a depth of 33km in the same area just after 1.15pm. Most of the quakes were marked either as weak or unnoticeable, although the 1.15pm one was listed as moderate by GeoNet. Hundreds have reported feeling the shakes on the GeoNet website. GNS seismologist Dr Matt Gerstenberger said the continuing earthquakes are normal but people should still stay vigilant about the danger of a tsunami.