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Earth of fire

Actualité volcanique, Articles de fond sur étude de volcan, tectonique, récits et photos de voyage

Publié le par Bernard Duyck
Publié dans : #volcanic activity
Sheveluch - 2022.06.19 / 20:48 UTC - photo Yu. Demyanchuk. IVS FEB RAS, KVERT

Sheveluch - 2022.06.19 / 20:48 UTC - photo Yu. Demyanchuk. IVS FEB RAS, KVERT

The growth of the lava dome continues at Sheveluch, with strong fumarolic activity and incandescence of the lava dome located at about 2,500 m. (the altitude of the summit is 3,283 m.); explosions and hot avalanches accompany this process.

KVERT video data from June 19 showed an ash plume up to 6,500 - 7,000 meters a.s.l., extending eastward for 10 km.

The extrusive eruption of the volcano continues. Ash explosions up to 10-15 km (32,800-49,200 ft) a.s.l. could occur at any time. Ongoing activity could affect aviation.

 

The aviation code remains orange.

 

Source: KVERT & VAAC Tokyo

Sheveluch - Volcanic ash advisory on 19.06.2022 / 2143Z - Doc. VAAC Tokyo

Sheveluch - Volcanic ash advisory on 19.06.2022 / 2143Z - Doc. VAAC Tokyo

No eruption or prolonged volcanic tremor is recorded at Turrialba.

Since June 17, significant degassing of the active crater has been observed, in particular on the SW inner wall. The volcanic edifice is in extension.

Fumaroles in the West Crater remain active on June 18. Seismicity with frequent volcanic earthquakes of low frequency and low magnitude. The volcanic building is maintained with a slight deflation.

 

Source: Ovsicori

Turrialba - fumaroles at 06.19.2022 / 06:59 - Ovsicori webcam - one click to enlarge

Turrialba - fumaroles at 06.19.2022 / 06:59 - Ovsicori webcam - one click to enlarge

A brief period of strong volcanic shaking was recorded over the weekend at Ruapehu, in New Zealand, and Crater Lake's temperature stabilized. The Volcanic Alert Level remains at Level 2.

For about three weeks, the tremor levels were mild to moderate. On Friday evening (June 17), the volcanic tremor increased sharply and fluctuated between moderate and strong levels over the weekend. Since Sunday June 19, the volcanic tremor has returned to low levels at Mount Ruapehu.

The temperature of Crater Lake (Te Wai ā-moe) had been decreasing at a rate of about 0.5°C per day until it stabilized over the weekend and is now 22°C. This is consistent with an increase in heat flux in the lake to around 130 MW.

The return of a moderate to strong volcanic tremor and the stabilization of Crater Lake temperature are consistent with a continued period of moderate volcanic unrest at Mount Ruapehu. GeoNet crews will conduct a gas measurement flight and sampling of Crater Lake when weather permits. As noted last week, the level of unrest is now considered moderate rather than intensified, but the potential for eruptive activity remains.

Over the next three weeks, the most likely outcome of ongoing unrest is no eruption. Minor eruptive activity, confined to the lake basin, is also possible, which could generate lahars (volcanic mudslides) in the Whangaehu River.

The volcanic alert is at 2, with an aviation code Yellow.

 

Source: GeoNet June 20, 2022 / 3 p.m. local time.

Ruapehu - GNS archive photo by Lloyd Homer, 1994 - one click to enlarge

Ruapehu - GNS archive photo by Lloyd Homer, 1994 - one click to enlarge

Photos of the barranca Ceniza of Fuego after the passage of the lahar on June 17, 2022 show changes in the landscape.

Heavy rains fueled by Tropical Depression Celia are causing a lot of problems, with flooding, landslides, damage to homes and infrastructure.

 

Source: Conred

 

Fuego - the barranca Ceniza after the passage of the lahar of 17.06 - photo Conred 19.06.2022 via W. Chigna

Fuego - the barranca Ceniza after the passage of the lahar of 17.06 - photo Conred 19.06.2022 via W. Chigna

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