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Ruapehu volcano (New Zeland): Crater Lake temperature has peaked at 41 °C, new scenarios and volcanic hazard map

Wed, 11 May 2022, 06:04
06:04 AM | BY: MARTIN
Ruapehu volcano today (image: GeoNet)
Ruapehu volcano today (image: GeoNet)
Volcanic hazard map of Ruapehu volcano in case of eruption (image: GeoNet)
Volcanic hazard map of Ruapehu volcano in case of eruption (image: GeoNet)
The volcanic-seismic unrest of the volcano continues to be elevated.
Steam and gas emissions over the Crater Lake (Te Wai ā-moe), detected last week, were confirmed of non-eruptive origin. Instead, they were associated with a combination of increased heat flow and cold atmospheric conditions.
The Crater Lake (Te Wai ā-moe) temperature has peaked at 41 °C over the past 12 days followed 36-38 °C period.
The strong volcanic tremor continues and is already considered the most persistent and intense tremor during the past 20 years accompanied by the gradually rising of Crater Lake.

Likely scenarios
1. Minor eruptive activity confined to the lake basin with the possibility to generate lahars (mudflows) traveling in Whangaehu River or no eruption. This is the most likely scenario within the next four weeks.
2. Stronger explosion that may impact the summit area to form volcanic surges and lahars reminding September 2007 or 1969/1975 eruption events.
3. The possibility of a prolonged eruptive episode or a powerful eruption, but this scenario remains very unlikely.

The GeoNet volcano observatory revealed a new volcanic hazard map in case of an eruption today, attached below.
The interpretation of this activity is consistent with elevated volcanic unrest at the heightened level and therefore the Volcanic Alert Level remains at Level 2. The Aviation Colour Code remains at Yellow.
Source: GNS Science volcano activity update 10 May 2022

Previous news

Thu, 5 May 2022, 06:40

Ruapehu volcano (North Island, New Zealand) - Smithsonian / USGS Weekly Volcanic Activity Report for 27 April-3 May 2022 (New Activity / Unrest)

On 2 May GeoNet reported that elevated unrest at Ruapehu continued during the previous week, consisting of lake water heating, volcanic gas output, and strong volcanic tremor. Variable tremor levels were characterized by bursts of strong tremor and short periods of weaker tremor. The lake water temperature had risen to 38 degrees Celsius. ... Read all
Tue, 3 May 2022, 23:32

Ruapehu volcano (New Zealand): steam plume above crater lake

Steam plume from north of Ruapehu. Photo Credit: GeoNet.
On May 3rd, 2022, a steam plume was visible above Mt Ruapehu's Crater Lake (Te Wai ā-moe). ... Read all
Show more
Ruapehu volcano sat by (c) Google Earth View
Ruapehu volcano sat by (c) Google Earth View
Ruapehu volcano
Stratovolcano 2797 m / 9,176 ft
North Island (New Zealand), -39.28°S / 175.57°E
Current status: normal or dormant (1 out of 5) Ruapehu volcano eruptions:

Typical eruption style
Mildly explosive, formation of lahars
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