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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 : #Actualités volcaniques

From approximately 07:50 UTC on July 14, an increase in the average amplitude of the volcanic tremor of Etna is observed

From around 09:05 UTC, a resumption of the strombolian activity is observed at the level of the south-eastern crater of Etna. According to the forecast model, the volcanic ash produced by the current activity is dispersed in the NE direction.
The activity leads to an overflow of lava directed towards the SW around 10:40 am approximately.

Etna SEC - 07.14.2021 / 11.58am - LAVE webcam - one click to enlarge

Etna SEC - 07.14.2021 / 11.58am - LAVE webcam - one click to enlarge

Etna SEC - lava fountain on 07/14/2021 / 12:15 p.m. - therm webcam. INGV

Etna SEC - lava fountain on 07/14/2021 / 12:15 p.m. - therm webcam. INGV

At around 11:00 UTC, the INGV signaled the gradual passage of Strombolian activity towards the lava fountain stage.
At 12:30 UTC, the observatory reports that the analysis of the images of the CCTV cameras and the satellite shows that the eruptive cloud, from approximately 11:40 UTC, reached a height of more than 9000 m. asl. INGV personnel on the ground are also reporting the fallout from large bombs on the southern flank of the Bocca Nuova crater.
The fountaining ceases at SEC around 12:30 UTC. From the analysis of satellite images, it is observed that the volcanic cloud moved towards the NE and reached the Calabrian coast from 12:20 UTC.
INGV staff present in the field reported abundant fallout of lapilli ash and ash (thickness greater than 1 cm) in the Rocca Campana district. There are reports of volcanic ash and lapilli fallout at Rifugio Citelli and Presa and volcanic ash at Taormina.

The 50 ° paroxysm of Etna was particularly violent!

Etna SEC - 07.14.2021 / 12:36 - LAVE webcam - one click to enlarge

Etna SEC - 07.14.2021 / 12:36 - LAVE webcam - one click to enlarge

Etna SEC - all the power of the 50 ° paroxysm - photo Etna Walk / Etna Map - other photos on his Facebook page - one click to enlarge

Etna SEC - all the power of the 50 ° paroxysm - photo Etna Walk / Etna Map - other photos on his Facebook page - one click to enlarge

Etna - trémor at 07.15.2021 / 06h00 - Doc. INGV OE

Etna - trémor at 07.15.2021 / 06h00 - Doc. INGV OE

A weak Strombolian activity remains at the Southeast crater, and the lava flow in the SW sector also remains fed.

 

Source: INGV OE

Etna - strong SO2 signal between Etna and Calabria with 98.70DU of SO2. - Sentinel-5P Tropomi from 07.14.2021 - also notice the Stromboli emission

Etna - strong SO2 signal between Etna and Calabria with 98.70DU of SO2. - Sentinel-5P Tropomi from 07.14.2021 - also notice the Stromboli emission

Stromboli - explosion on July 14, 2021 at 1:19:28 p.m. and 1:19:30 p.m. - therm INGV webcam - one click to enlargeStromboli - explosion on July 14, 2021 at 1:19:28 p.m. and 1:19:30 p.m. - therm INGV webcam - one click to enlarge

Stromboli - explosion on July 14, 2021 at 1:19:28 p.m. and 1:19:30 p.m. - therm INGV webcam - one click to enlarge

Stromboli - explosion on 07/14/2021 - Photo L.G.S.

Stromboli - explosion on 07/14/2021 - Photo L.G.S.

The amplitude of the Stromboli volcanic tremor was observed from 12:30 UTC on July 14, with a maximum peak on medium-high values ​​around 13:00 UTC.

At 13:19 UTC there is an explosion more intense than usual in the South Central area. The products fell along the Sciara del Fuoco for 3 minutes, and also reached the Pizzo area.

From a seismic point of view, the explosive event of 13:19 UTC is associated with a seismic signal in the VLP band of 3.3 x10- 5 m (in displacement) and a soil deformation of about 0.6 microradians (recorded with the OHO tiltmeter )

 

Sources: INGV OE & LGS

Stromboli - seismogram of 14.07.2021 - Doc. L.G.S.

Stromboli - seismogram of 14.07.2021 - Doc. L.G.S.

The eruption at Suwanosejima Ontake Crater (started October 23, 2004, still ongoing / GVP) is in an active phase.

The JMA reports 96 explosions between July 5 and 12, accompanied by ash plumes generally rising between 2,000 and 2,400 m. above the crater, nocturnal incandescence and ejections of large bombs.

On July 15 at 1:56 p.m. local time, an explosion was accompanied by a plume of gas and ash 2,200 meters above the Ontake.

The alert level remains at 3, with a danger zone of 2 km radius.

 

Source: JMA and VAAC Tokyo

Suwanosejima - the eruptive plume on 07.15.2021 at 1:59 p.m. - 2 p.m. - JMA webcam

Suwanosejima - the eruptive plume on 07.15.2021 at 1:59 p.m. - 2 p.m. - JMA webcam

The Servicio Geologico Columbiano informs the authorities and the community that since yesterday July 13 at 22:04 (local time) and until today at the time of the issuance of this report, several seismic signals associated with the emission of gas and Ashes were recorded in the atmosphere of the Nevado del Ruiz volcano (VNR).

Some of these broadcasts were confirmed by the web cameras installed in the volcano area and by the report of the officials of the Los Nevados National Natural Park, presenting a maximum eruptive plume height of 1,050 m above the summit of the volcano associated with the July 14 broadcast at 8:47 a.m. (local time).

 

The level of yellow activity (or III) / unstable behavior. At this level, in addition to other phenomena, gas and ash emissions can occur. In recent years, the volcanic activity of the VNR has been characterized by the recurrent recording of small emissions of gas and ash that affect areas close to the volcano or populations located according to the direction of the wind.

 

Source: S.G.C Manizales

Nevado del Ruiz - image archives 2019

Nevado del Ruiz - image archives 2019

In Fagradalsfjall, the situation remains similar to the previous 2 days: the tremor varies in the same proportions, the lava seems to come out directly from the active crater after its morphological changes and flows in the direction of the valley of Meradalur.

 

Sources: RUV and Almannavarna webcams, Hraun .vedur.is

Fagradalsfjall - tremor on 15.07.2021 - Doc. Hraun.vedur.is

Fagradalsfjall - tremor on 15.07.2021 - Doc. Hraun.vedur.is

Fagradalsfjall - 14.7.2021 - RUV webcam via Jarðsöguvinir - Friends of Historical Geology

Fagradalsfjall - 14.7.2021 - RUV webcam via Jarðsöguvinir - Friends of Historical Geology

Fagradalsfjall - 14.07.2021 - webcam Almannavarna / Meradalur via Jarðsöguvinir - Friends of Historical Geology

Fagradalsfjall - 14.07.2021 - webcam Almannavarna / Meradalur via Jarðsöguvinir - Friends of Historical Geology

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