Seismicity at Mt. Tongariro, New Zealand looks to have decreased a lot yesterday and today. GNS science reported however today that : “Provisional analysis of the gas samples collected at the weekend indicates the presence of volcanic gas. Our historic sampling has shown there is a mix of volcanic and hydrothermal gases and fluids at Tongariro. However the sampling on Saturday has shown a marked increase in the volcanic gas component. These results are showing the volcanic unrest indicated by the seismic data is confirmed by the gas data. We are working to complete the analysis of the gases and water samples and planning further visits later in the week when the weather improves. GNS Science volcanologists are monitoring the unrest and further information will be released as necessary. ” and members of the public have reported gas smells too.
Mt. Tongariro is a volcanic complex that lies to the north of Ngauruhoe. It consists of numerous craters and vents .
Ash eruptions have been recorded from Tongariro from 1855 to 1897, as well as unconfirmed activity in 1926-27.
The alert level remains at 1.
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