A Vulcanian explosion from the Ngauruhoe cone of Tongariro volcano in New Zealand on 19 February ejects an ash plume and ballistic ejecta. Blocks up to 20 m across reached hundreds of meters above the vent before impacting the flanks.

Photo by Ian Nairn, 1975 (New Zealand Geological Survey).

Keywords: Vulcanian | ash plume | volcanic ash | eruption | ballistic ejecta | explosive eruption | ballistics | blocks | ash plume | crater | vent

Tongariro