Volcanic activity in Canary Islands 2021

[jand]

[jand]

And a bit of the outline in the graph of energies released from the seismic forecast... (Enrique)

1- máximo: 01:15h IGN y Canarias, 02:15h penínsular. - 06/11/2021
2- máximo: 13:40h IGN y Canarias, 14:40h penínsular. - 06/11/2021
3- máximo: 02:05h IGN y Canarias, 03:05h penínsular. - 07/11/2021

[jand]

What is a dirty storm or volcanic lightning?
We tell you what this spectacular meteorological phenomenon consists of.

It is a phenomenon that is also known as volcanic lightning, because gigantic electrical discharges are produced like those of conventional storms , but in the plume - the gas column of a volcano when it erupts.

As José Miguel Viñas, physicist, scientific communicator and consultant to the World Meteorological Organization (WMO) explains, “these discharges are formed by a mechanism in some way analogous to that which takes place in storm clouds, in cumulonimbus clouds. If in these it is the friction between the hailstones in the upper part of these cumulonimbus that separates the electric charge and gives rise to these discharges, in the volcanic cloud the elements that escape from the crater, the pyroclasts and the volcanic ashes, enter into friction, which also causes the separation of electrical charge and the appearance of lightning ”.

In any volcano
Dirty storms, therefore, are a phenomenon that can occur in any erupting volcano . The first recorded observation is from the year 79, when the Roman historian Pliny the Younger described the eruption of Mount Vesuvius. It was also there that the first scientific studies of dirty storms were carried out, carried out by Professor Luigi Palmieri during the eruptions of 1858, 1861, 1868 and 1872, which often included lightning activity.

An investigation published in 2008, in the Volcanology Bulletin, pointed out that between 27% and 35% of the eruptions are accompanied by these flashes. In this sense, spectacular dirty storms have been photographed in various parts of the world, such as the Chaitén volcano in Chile; in Colima, from Mexico; on Mount Augustine, Alaska ; in the Eyjafjallajökull, of Iceland; and on Etna, from Sicily.

[jand]

The eruption 10:30 today.

The volcano is still spewing out lots of black ash today and has been very noisy with explosions.

https://www.facebook.com/INVOLCAN/videos...157298442/

[jand]

Video 15:30 today still spewing out black ash.

https://www.facebook.com/INVOLCAN/videos...4810084780

[jand]

https://www.facebook.com/efemeteo/videos...2193661645

[jand]

Soler (CSIC): "Everything is theories, the only reality is that the eruption continues"
The volcanologist from the Higher Center for Scientific Research says that "we are at a crossroads regarding the behavior of the volcano"
- The appearance of elemental sulfur deposits denotes "a clear change" in the dynamics of the volcano

EFE

Santa Cruz of Tenerife -
November 6, 2021 4:15 p.m.
0

The volcanologist of the Higher Center for Scientific Research (CSIC) Vicente Soler admits that the scientific community is facing "a crossroads" regarding the behavior of the La Palma volcano, because although it has entered a new phase, that does not mean that the end is closer.

"It is not easy to make a composition of a unique place. There are too many parameters at stake and you have to wait several days. I wish it would come to an end, but it is still a wish. We are all expectant. We do not have a crystal ball," he says in statements to Efe.

The Volcanological Institute of the Canary Islands (Involcan) published this Friday that the appearance of elemental sulfur deposits in the main cone could point to a "clear change" in the dynamics of the eruption, not to its end.

Vicente Soler comments in this regard that it is not the first time that this phenomenon has been observed in the Cumbre Vieja volcano.

In what it does coincide is that in the last hours there has been a change in dynamics, with a predominance of a Vulcan behavior over a Strombolian one, since the incandescent pyroclastic plume has almost disappeared.

He qualifies, so as not to generate "a false alarm", that with Vulcan it refers to a phase of gaseous emission with formation of dark brown volutes, and adds that the value of Cumbre Vieja in the VEI explosivity index is two, perhaps three, on a scale of zero to eight.

He also recalls that the eruption of the San Juan volcano (1949) alternated strombolian and Vulcanian phases "from the very beginning."

Around the million dollar question, how much is left of the eruption that began on September 19, Vicente Soler indicates that "there are a series of phenomena that do not help": the main one, which is now "very difficult" to quantify how much lava it is coming out because the main point of emission pours over a volcanic tube.

"In the first 500 meters the lava is not seen; further down it falls down the promontory that was created by the last collapse of the cone and then there is an upwelling of lava that spreads on several fronts, which later merge", he describes.

"Before with a pair of binoculars you could see the lava coming out; now there is nothing like that", which can lead to think that "this is coming to an end. What you have to do is have a little patience," advises Soler.

Regarding the volcanic tremor, remember that four days ago there were a series of explosions from which the vibrations have declined, as happened on September 24, when the sonic bombs were registered that forced the rapid eviction of several neighborhoods.

Soler's thesis is that the magma had difficulties to exit through the conduit, as if it were too narrow, until it enlarged and the lava began to come out more easily, and he believes that the same thing could be happening now, with the difference of that cannot be seen with the naked eye because it does not run on the surface. "It could happen that the end is far away," he slides.

Regarding the decrease in seismicity and sulfur dioxide emissions, he agrees with his colleagues that we must wait for these "small signs" to consolidate into "a clear and sustained trend."

To all these factors, he adds the lithostatic pressure, that is, the weight of the volcano on the supply system and its possible impact on the local deformation of the terrain and on the type of lava that rises to the surface.

"It is not surprising either," he continues, that the chemistry of the gas plume varies as the eruptive process progresses and the magma feedbacks come from deeper.

"Everything is theories. The only reality is that the eruption continues. Earth science is like that for the simple reason that no one has had access to its interior. Lava is a representation of what happens near the surface", Soler reflects.

"We can not make checks. Geologists have it easier: with a microscope you do magic things. Talking about the center of the Earth is a gamble," he concludes.

[jand]

The General Directorate of Security and Emergency, in application of #PEVOLCA, updates information about air quality by PM10 particles:
➡️Extremely unfavorable in Los Llanos de Aridane, El Paso, Tazacorte, Puntagorda and Tijarafe

[jand]

06/11/2021 18:30h Canary Islands. - ERUPTION OF LA PALMA ISLAND. - DAY 49. - LOWER THE SISMICITY, THE SESMIC ENERGY RELEASED AND NATIVE ASUFRE. ON THE contrary, DEFORMATION, THE VOLCANO ON THE contrary, A LOT OF ASSHE WITH RAYS AND MAGMA. - Seismicity gives us the first joy in a long time, now it's going down and that's good news as it indicates a drop of pressure of the whole system in depth, at least that seems, since unfortunately there is still to e wait 48-96 hours no Earthquake 5+ to confirm this fact.

RELEASED SESMIC ENERGY ACCUMULATED-

Right now there is a GAP or gap or lack of accumulated seismic energy released that would equivalent to a 5.3 Earthquake.. a lot seems to me and if this continues it seems the system is relaxing, the energy rate emitted is obviously dropping. We haven't had a very strong seismic at the highs I set yesterday, a 4.0 which is the strongest in the last few hours near the first high and shallow, is very significant.
First max - 01:15am - about half an hour.

es2021vsuwr 06/11/2021 01:39:17 28.5598 -17.8321 11 km

III-IV M 4.0 mbLg NE PALM FUENCALENT. ILP

The second maximum - 13.40h - has not happened and the most intense earthquakes have been these, which if they are the maximum, welcome.

es2021vince 06/11/2021 13:06:37 28.5525 -17.8385 15 km
II-III M 3.5 mbLg NE PALM POWERHOUSE. ILP
es2021vtrgc 06/11/2021 12:57:04 28.5592 -17.8320 12 km
III M 3.6 mbLg NE PALM FUENCALENT. ILP

Now we have the third maximum this morning at 02:05h IGN and Canaria, let's see what we have, whether a big one or otherwise still relaxing as we all expect and there's nothing outstanding. In addition, tomorrow the next maximum will be 12h and 25min later (It's the lapso), at 14:30h IGN and Canaryas and 15:30h Peninsular. (Enrique)

ASHENSIONS:
The upper mouths continue to cast a lot of ash, with sporadic rays and their thunder, but the most important thing is that the wind today takes everything to the sea, towards the southwest. Don't miss this morning's Involcan video.

https://twitter.com/i/status/1457007446841561091

VIDEO FROM THE OTHER SIDE: - ASHENSES

https://twitter.com/i/status/1457030057394855942

The appearance of native sulfur on the side of the volcano indicates a change in the dynamics of the volcano, or as they say since Involcan, a "clear change in trend":
Sigh in the volcano.

https://twitter.com/i/status/1456701783661756421

"Experts explain that to form an elemental sulfidric acid (H2S) reaction is needed." This could be indicating that the magmatic part of gas might be coming down. Ultimately, this drop in the magmatic component would result in an increase in H2S emissions." It is, a possible indicator that something is changing in Cumbre Vieja. Now, experts are asking to keep calm and not jump to jump to conclusions. "This fact does not imply an end to the eruption," they clarified.

https://lanoticia.digital/.../aparicion-cumbre-vieja...

DEFORMATION AND TREMURATION:

The deformation data at the LP03 station indicates that it has risen or inflated about 10 cm in the last 24 hours in that area, and in addition it has a little significant movement in the horizontal of 2 cm westbound and 1 cm southbound. This indicates that more magma reaches the erupting point when the pressure rises.
The tremor has been rising and now holds for the last 36 hours, although it has had a couple of episodes with very high or high explosive values. This would indicate more magma reaching the eruptive point, hopefully it's the last thing that sends from below the last 5 Earthquake we had and the spasmodic tremor a few days ago.

LASTLY, AIR QUALITY

It's not good at all in the valley, at least in view of the station's graphics where you can see a lot of fine particles of ash and a lot of SO2, which has reached almost 200 micrograms per cubic meter concentrations.

http://www.ica.miteco.es/

If we look at the data of the gases emitted by the volcano, we have the measure of SO2 today, it is a little lower than yesterday but it is still very high because it is 29,000 tons daily and for CO2 about 1,850 tons daily.

MAP OF NECKLACE
The coladas advance and the huge kipuka with buildings left of Todoque just before the Mountain, has disappeared and it's history, yesterday's flow 15 has taken it ahead.... Whether it's going north or south, it looks like it's headed south.

Drone flight today at 8:15h.

https://www.youtube.com/watch?v=awc1mEjUIlg

term today at 8:05h

https://www.youtube.com/watch?v=jg3pLXQT4_E

We'll see what happens, but this time the Earthquake if it seems to be going down (there has been no Earthquake of 4+) and if in the next days (48- 96h) is still (there is no 4.5+) and confirms it without the occurrence of moderate earthquakes, the eruption will go down in all the parameters, though not it's declawable any report, let's hope it's just that and in 2-3 weeks we could say something like this could end the eruption, it's soon, but at least it's the first day I can say it with a little certainty (30% nothing more). Greetings. (Enrique)

[jand]

Map of the coladas today with flow 15 that is very active, the truth is that it has not been easy, there is a lot of lava going down there... but a lot of things to talk about, he goes to the ocean with a firm step and has advanced 700-750m since yesterday no less with two fronts of more than 200m, it's impressive. Don't miss the thermal video.. (Enrique)

https://www.youtube.com/watch?v=jg3pLXQT4_E