Ruapehu volcano (North Island, New Zealand): series of quakes beneath summit area

Mi, 12. Jan 2022, 05:36

05:36 AM | VON: MARTIN

Distribution of earthquakes since 2019 including the latest records (image: GeoNet)

A series of tectonic earthquakes (30) located beneath the summit area have been recorded since 30 December.
"When compared to historical records, the number of earthquakes with epicentres closely confined to the summit area, is unusual. While these earthquake clusters are uncommon, none of our monitoring data suggests that the volcano is exhibiting increased levels of activity. There has been no observable response from other continuous monitoring data such as Crater Lake (Te Wai ā-moe) temperature, lake level, or volcanic tremor. Therefore, our current assessment is that a relatively deep stress release has occurred below the volcano, but this has not affected the volcano's hydrothermal system.", says the GeoNet New Zealand observatory.
The Volcanic Alert Level remains at Level 1 and the Aviation Colour Code remains at Green.
Source: GeoNet New Zealand volcano activity update 11 January 2022

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Do, 16. Dez 2021, 02:01

Ruapehu volcano (North Island, New Zealand): Crater Lake is heating, fluctuating temperatures continue

Fluctuating temperatures at Crater Lake since July (image: GeoNet)

The activity of the volcano is characterized by typical heating-cooling cycle over the past months. ... Read all

Di, 28. Sep 2021, 01:38

Ruapehu volcano (North Island, New Zealand): Crater Lake's fluctuating temperatures continue, currently cooling

Ruapehu volcano’s Crater Lake (image: GeoNet)

The activity at the Ruapehu's Crater Lake (Te Wai ā-moe) is characterized by roughly regular periods of heating and cooling cycles. ... Read all

Mi, 22. Sep 2021, 06:00

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

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. ... Read all

Fr, 16. Jul 2021, 06:14

Ruapehu volcano (North Island, New Zealand): new heating phase starts at the crater lake

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 (North Island, New Zealand): Crater Lake temperature down to 26°C

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

Mi, 13. Jan 2021, 06:00

Ruapehu volcano (North Island, New Zealand) - Smithsonian / USGS Weekly Volcanic Activity Report for 13 January-19 January 2021 (Continuing Activity)

GeoNet reported that volcanic tremor at Ruapehu declined to low levels on 29 December 2020, and remained low; volcanic gas emissions returned to background levels by the next day. Water chemistry had only slightly changed compared to data collected a few weeks prior. Although the temperature of the crater lake water remained high (40 degrees Celsius), the period of heightened unrest was over; the Volcanic Alert Level was lowered to 1 and the Aviation Color Code was lowered to Green on 11 January. ... Read all

Mo, 11. Jan 2021, 11:46

Ruapehu volcano (North Island, New Zealand): Volcanic Alert Level lowered to Level 1; activity has decreased

Aerial view of Crater Lake at Ruapehu volcano (image: GeoNet)

The activity of the volcano continues at fluctuating levels during the past few months and currently continues at low levels. ... Read all

Mo, 28. Dez 2020, 08:27

Ruapehu volcano (North Island, New Zealand): crater lake temperature has decreased

Satellite imagery of Ruapehu volcano (image: Sentinel 2)

GeoNet reported that the crater lake temperature has decreased since the last update. On 21 December the temperature reached a maximum of 43 °C that subsequently declined to approx. 41 °C. A lake temperature peak of approximately 40-46 °C is common during the heating-cooling cycles. The lake temperature exceeded 40 °C on at least 7 occasions since 2007. According to lake temperature decrease, estimated energy into the crater lake has decreased from 400 MW to 200 MW. ... Read all

Ruapehu volcano (North Island, New Zealand): series of quakes beneath summit area

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