Ruapehu volcano (New Zealand): ): Volcanic Alert Level lowered to Level 1

Mon, 4 Jul 2022, 21:54
21:54 PM | BY: MARTIN
Volcanic tremor development at Ruapehu volcano over the past 6 months (image: GeoNet)
Volcanic tremor development at Ruapehu volcano over the past 6 months (image: GeoNet)
The volcanic tremor at the volcano continues at low levels over the past 20 days since the last recorded elevated signals.
The Crater Lake (Te Wai ā-moe) temperature has slightly cooled off to 24 °C and continues at decreasing trend. In addition, water samples analysis from the lake confirmed a chemical interaction between magma and hydrothermal system to control the composition, level and temperature of the lake.
Therefore, the Geonet observatory lowered the Volcanic Alert Level to 1 and the Aviation Colour Code to Green as all monitoring data reflected a decreasing level at the volcano.
The GeoNet continues: "Despite the decline in volcanic unrest the potential for eruptive activity remains. Over the last 2-3 months a magmatic intrusion has occurred inside the volcano, increasing heat and gas flow into the hydrothermal system associated with the Crater Lake. Our data indicate that the intrusion has stalled or stopped moving. Whilst this means that the current unrest episode has ended, the presence of recently stalled magma in the volcano suggests that a sudden resumption of activity would be more possible than the last time Ruapehu was at Volcanic Alert Level 1."
Source: GNS Science volcano activity update 4 July 2022

Previous news

Wed, 29 Jun 2022, 14:00
On 28 June GeoNet reported that it had been 10 days since the last notable tremor at Ruapehu and the level remained weak. Lake water temperatures declined to 21 degrees Celsius on 14 June from a high of 40 degrees Celsius recorded in early May; temperatures had increased to 25 degrees Celsius during the previous two weeks. Gas emissions continued to fluctuate based on data collected during overflights and were about 10% less on 23 June than on 13 May, though the sulfur dioxide rate during 24-25 June was comparable to those recorded in mid-May, based on gas measuring equipment recently installed at the volcano. ... Read all
Tue, 28 Jun 2022, 20:40
Ruapehu and Ngauruhoe volcanoes today (image: Geonet)
The volcanic tremor at the volcano continues at low levels. ... Read all
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