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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
 Etna SEC - 06.14.2021 / 9.45pm - strombolian activity and eruptive plume - EMOV / INGV webcam

Etna SEC - 06.14.2021 / 9.45pm - strombolian activity and eruptive plume - EMOV / INGV webcam

Since approximately 9:10 p.m. on June 14, a new increase in Strombolian activity at the Southeast Crater of Etna has been observed. According to the forecast model, the eruptive cloud produced by this activity disperses in the SE direction. In addition, an overflow of lava is observed from the south side of the southeastern Crater which spreads to the southwest.

At the same time as the increase in Strombolian activity, we observe a further increase in the average magnitude of the volcanic quake at the high level, located in the Southeast Crater region at about 2900 m. above sea level.

The INGV announces at 21:46 UTC that the Strombolian activity has passed to the lava fountain. The fountain ceased to be active at 10:44 UTC / 12:44 local time on June 15.

 

Source: INGVvulcani

Etna SEC - 06.14.2021 / 9:39 p.m. - webcam therm. INGV and variations of the tremor at 06.15.2021 / 1 p.m. - Doc. INGV - One click to enlarge
Etna SEC - 06.14.2021 / 9:39 p.m. - webcam therm. INGV and variations of the tremor at 06.15.2021 / 1 p.m. - Doc. INGV - One click to enlarge

Etna SEC - 06.14.2021 / 9:39 p.m. - webcam therm. INGV and variations of the tremor at 06.15.2021 / 1 p.m. - Doc. INGV - One click to enlarge

Etna - evolution of the Southeast crater from June 2007 to June 2021 - photos Boris Behncke, taken from the same point: north edge of Mount Barbagallo.

Etna - evolution of the Southeast crater from June 2007 to June 2021 - photos Boris Behncke, taken from the same point: north edge of Mount Barbagallo.

The week of June 7 to 13 was marked by moderate activity in Sabancaya, with an average of 79 daily explosions, accompanied by ash plumes up to 2,000 meters above the summit.

During the period, I.G. Peru detected 1070 earthquakes of volcanic origin associated with the circulation of internal magmatic fluids. VT earthquakes, from M 2.0 to 3.5, occurred over an eastern sector.

The institute does not report any significant deformation anomalies; it signals 11 thermal anomalies, with a max. of 22 MW, associated with the presence of a lava body on the surface in the crater.

 

Source: I.G. Peru

Sabancaya - activity from 07.06 to 13.06.2021 - Doc. I.G. Peru

Sabancaya - activity from 07.06 to 13.06.2021 - Doc. I.G. Peru

Sabancaya - 06.13.2021 - thermal anomaly and plume - image Sentinel-2 bands 12.11.8A - via Mounts project

Sabancaya - 06.13.2021 - thermal anomaly and plume - image Sentinel-2 bands 12.11.8A - via Mounts project

The Kīlauea volcano is no longer erupting. No surface activity has been observed by field crews or webcam images over the past week.

The most recent sulfur dioxide (SO2) emission rates, measured on June 11, 2021, were 70 tonnes per day (t / d). SO2 emission rates approach the levels associated with the non-eruptive period from late 2018 to late 2020 (30-35 t / d) and are significantly lower than the emission rates which were on average over 800 t / d from mid-February to mid-April.
Summit tiltmeters have registered a deflation-inflation cycle over the past week, with slight inflation over the past two days. Seismicity remains broadly stable, with earthquake counts over the past week similar to previous weeks.
It is possible that the Halema'uma'u vent will resume its eruption or that the Kīlauea will enter a period of calm before the next eruption.

Kilauea - Halema‘uma‘u crater - solidified crust covers the lava lake - 06.11.2021 / 12:20 HST - photo HVO / JM. Chang

Kilauea - Halema‘uma‘u crater - solidified crust covers the lava lake - 06.11.2021 / 12:20 HST - photo HVO / JM. Chang

Kilauea - Halema‘uma‘u crater - higher temperature spots - 11.06.2021 / 20:42 HST - photo webcam therm. HVO

Kilauea - Halema‘uma‘u crater - higher temperature spots - 11.06.2021 / 20:42 HST - photo webcam therm. HVO

The surface of the lake is completely covered with a solidified lava crust. No surface activity or evidence of recent surface activity has been observed over the past week. Small, higher temperature spots around the rim and in local cavities remain visible on the webcam thermal imaging, albeit at temperatures well below those associated with molten lava.


Current volcanic alert level: Advisory
Current Aviation Color Code: Yellow

 

Source: HVO-USGS

Fagradalsfjall, Nátthaga valley - steep lava advance between 06.15.2021 at 07:21 am and 10:29 am - the landmark is the vegetation triangle on the left - webcam mbls
Fagradalsfjall, Nátthaga valley - steep lava advance between 06.15.2021 at 07:21 am and 10:29 am - the landmark is the vegetation triangle on the left - webcam mbls

Fagradalsfjall, Nátthaga valley - steep lava advance between 06.15.2021 at 07:21 am and 10:29 am - the landmark is the vegetation triangle on the left - webcam mbls

Fagradalsfjall Eruption: Lava is now entering the Nátthaga Valley from four different points, the fourth of which started on Sunday and is still flowing now.

The flow extended into the Nátthagi valley and currently circulates mainly in tunnels (15/6 - Pierre Gondolff)


According to the latest data from the Institute of Earth Sciences at the University of Iceland, the lava flow has been stable at 12 cubic meters per second for about six weeks, for a running total of about 60 million meters. cubes so far.

Sources: RUV, mbls and P. Gondolff

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