2 spots left on Iceland Geo Tour 16-30 July 2022

Ruapehu volcano (North Island, New Zealand) - Smithsonian / USGS Weekly Volcanic Activity Report for 22 September-28 September 2021 (Continuing Activity)

Mi, 22. Sep 2021, 06:00
06:00 AM | VON: VN
GeoNet reported that a heating cycle at Ruapehu's summit Crater Lake had ended. During the previous two months the temperature of the water increased from 20 degrees Celsius to a peak of 39.5 degrees on 4 September, and then decreased to 28 degrees. During the cycle the color of the lake changed from a blue-green color to a darker gray, reflecting the disturbed lake floor sediments suspended in the water from the influx of hot fluids.
The key monitoring parameters of water level and temperature, seismic activity, and tremor levels, were all within normal ranges. The Volcanic Alert Level remained at 1 (minor volcanic unrest) and the Aviation Color Code remained at Green.

Source: GeoNet
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From: Global Volcanism Program, 2021. Report on Ruapehu. In: Mayberry, G (ed.), Weekly Volcanic Activity Report 22 September-28 September 2021. Smithsonian Institution and US Geological Survey.

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Fr, 16. Jul 2021, 06:14
Ruapehu volcano today (image: GeoNet)
Typically, over periods of months, Ruapehu's crater lake (Te Wai ā-moe) experiences heating and cooling cycles. In late December 2020 the lake heated to around 43°C marking the high point of the previous cycle. Early 2021 the lake cooled through to February 2021, before starting to heat again in early March. A maximum of 41°C was reached on 12 April 2021. The lake then started to cool down to 20°C on 2 July. The lake temperature started to rise again last week and is currently 23°C. ... Read all
Di, 8. Jun 2021, 20:09
Ruapehu volcano’s Crater Lake (image: GeoNet)
The activity of the volcano continued at fluctuacting levels as in December last year the elevated volcanic activity was recorded, but this unrest decreased on 11 January 2021. ... Read all
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