National carrier Air New Zealand canceled or delayed domestic flights due to Mount Tongariro Volcano ash on Monday night.
Gisborne, Rotorua, Taupo and Palmerston North May be affected.
The aviation colour code around Mt Tongariro was downgraded from red to orange, but the volcanic alert level remains. The plume from the eruption last night was steam-driven and 7000 m high. The colour code is used to alert aviation carriers to volcanic activity.



Air New Zealand flight NZ-99 had to return and make an emergency landing in Auckland, New Zealand, on April 21st.