Volcanic Alert Bulletin TON-2012/31 - Tongariro Volcano
[link to info.geonet.org.nz
22 November 2012, 4:15 pm - Eruption update: Tongariro still gassing but no ash; Volcanic Alert Level remains at Level 2; Aviation Colour Code remains OrangeActivity at Tongariro remains low but the volcano is still emitting a significant amount of gas, but with no ash.Today’s observations confirm that the volcano is producing a lot of gas. The odour was noticed in the Manawatu and Hawke's Bay, the primary downwind areas of Te Maari (Tongariro).Depending on weather conditions people may notice the smell of sulphur a hundred kilometres or more from the volcano. However, any health impact is likely to be limited to minor irritation of the skin and eyes, and possibly some irritation of the throat. Anyone who has respiratory problems and/or uses asthma medication, and has concerns with their health related to the gases, should seek medical advice.
Read about issues related to volcanic gas on the International Volcanic Hazards network.
GNS scientists carried out an observation flight around Tongariro today and were able to assess the general extent of the yesterday’s eruption. GNS scientist Craig Miller reported that “The Upper Te Maari hasn’t changed significantly after the eruption”.
The Volcanic Alert Level remains at 2 and the Aviation Colour Code at Orange.
GNS Science continues to closely monitor the situation.
The Volcanic Alert Level ranges from 0 to 5 and defines the current status at a volcano. Level 2 indicates that a minor eruption has occurred.
Aviation Colour Codes are based on four colours and are intended for quick reference only in the international civil aviation community. Code Orange indicates that a volcanic eruption is underway but with little or no ash being produced.
Brad Scott, Nico Fournier