Volcanic activity in Canary Islands 2021

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https://twitter.com/RTVCes/status/1461039257976549390

[jand]

Update last night courtesy of Enrique.

17/11/2021 18:45h Canary Islands. - ERUPTION OF LA PALMA ISLAND. - DAY 60. - WATER ENTERS THE SYSTEM AND PROVIDES SEISMICITY AND INCREASE TREMURING IN THE VOLCAN. NO MORE INTRODUCTION DEEP MAGMA. NEW NEIGHBORHOOD BORDING TOTOKE MOUNTAIN NORTH. - What do you want me to tell you, I do not square at all the data of the depths of the IGN earthquakes, does not block anything, those that are 10 km away, are much more superficial, that there is no superficial seismicity in the drive and next to the volcano is rare imo and anomal him and those who are 35km away are too deep. We're attending in terms of seismicity referring to three processes at different depth.

1. - The first of the processes, is the release of material by the eruptive point that causes a strong seismic signal of tremor by the higher speed of the materials, which bring more gases. This is mostly due to the presence of more water in the magma. The signal has been going up all day and eye, the volcano is changing its behavior and could suddenly stop, like the Etna does and then start back up for a while or hours. In the upper three chimneys, it is observed that blue smoke comes out with quite SO2 at the bottom, a lot of white smoke with water vapor in the center and that in addition a precipitation form of yellow colored sulfur, indicating the presence of that water and the from above expelled a lot of ash, in this video you look very good:

https://twitter.com/i/status/1461022726752198660

The water entry into the system in the last stretches is more than obvious and perfectly appreciated not only in the emissions of pyroclasts and ash, but also in the fact that deformation does not rise, while the tremor does. The one who is not located seismicity in this area between 1 and 5 km as I say is very rare. Inclinometers should also give a tendency to deflate, in case anyone sees them.

2. - The second of the processes is at the base of the island and the ocean bark between 6 and 10km and consists of cycles of presurization-depressurization in that area that is causing a lot of seismicity and may even water entry, as going down the pressure of the system, in addition to entering pressurized water, some fractures will be closed, but as the system has enough energy or pressure, in a moment it opens them again with an Earthquake, so that as soon as it pressurizes a little it breaks and opens again pro calling quite a seismicity in that area. Today we have had a busy day on the island for this reason with earthquakes between 3 and 4 as we predicted yesterday with a maximum of 3.7-3.8, except the bigger ones that are for something else.

3. - Great deep earthquakes have been few, they continue to meet the patterns of approximately 6, 12, and multiple. This process is the most respect imposes me, since it imposes the engine or the pump that feeds the entire volcanic system and there are no spasmodic tremors, so now if it is seismicity caused by the litoestatic adjustments between the pre Zion of the island and the magma, let's the magma no longer push with desire, but the balloon deflates and later in the afternoon gives stronger earthquakes of up to 4.8.

es2021in 17/11/2021 07:17:43 28.5658 -17.8255 35.0 km
III-IV M 4.7 mbLg SW MARCH VILLA. ILP
es2021wntda 17/11/2021 12:33:54 28.5954 -17.8322 35.0 km Sense M 4.8 mbLg W MAZO VILLA. ILP
es2021wntcq 17/11/2021 12:33:35 28.5854 -17.8065 37.0 km

IV M 4.7 mbLg SW MARCH VILLA. ILP

That we have two earthquakes is a very normal measurement error and I think it is due to an anomaly of the natural variation of densities in the bark that doubles the signal (on one side it is more dense and comes before and on the other less dense and comes later) since it is very rare that it happens almost always with the same delay.

EXPLANATION OF WHAT IS HAPPENING.

Explaining this is not easy, in the end the eruption is like a giant hydraulic cat, first lifts the island putting magma very deep warm and less density that enters by a small conduction in one or several "sill" or horizontal dique to about 10 km that extends sideways to along a lot of surface and pushes the island up (deformation up in much extension) then look for an exit or eruptive point (more deformation in localized areas LP03 and LP04) and continue adding material while eruption lasts, h until this is over and stops uploading from lower levels. Then the island tries to recover its initial position by dishing out and coming down again, feeding the eruptive point with this reservoir/s of material of the "sill" or horizontal dique which is what it is doing now, provoking seismicity there, p Ero never reaches its original position, it's going higher as part of the material cools down there, and only comes out between 10 and 20% of the material that enters under the island, the rest stays under the island, and in this way, it is slowly rising with the years. The cushioned sinks of the ravine of the Angustias that drains the Taburiente boiler formed below the sea level and now they are very high, this is the reason they have risen.

NECKLACE MAP:

As for the coladas I've posted a photo marking the coladas heading north of Mount Todoque, the day before yesterday we had one that stopped between 9A and 9C... yesterday there was a small attempt next to the mountain of todoque by the edge, but it stopped and today it has finally exploded and low by the north flanco of the mountain following the south edge of the 9A laundry, let's see if I put a map. In the next video you can see this much better at sunset and it already passes from the mountain of Todoque, inculcán calculated that was going at about 70 meters per hour, a burrada in terms of speed, it travels 1500m in 24h.

VIDEO OF TODAY'S IGME NECKLACE THIS MORNING.

https://www.youtube.com/watch?v=4d-meR7Y7JI

VIDEO OF THE NORTH OF THE MOUNTAIN OF TODOKE A MOUNTAIN A RAT:

https://twitter.com/i/broadcasts/1eaKbNMgjmjKX

Although it does not seem like it, the volcano goes out, it is in the last, it has no deep contributions, the volcano is holding on to the revenues of the material left in the reservoir about 10-12km and when the pressure low enough, the flow d will be cut off and material and stop. Follow my forecast to stop between 5-12 days.. I'll just leave this right here. Now that's it when it stops, we'll see how many storks it will give... hopefully few a couple as much as a few hours. (Enrique)

[jand]

[jand]

[jand]

Yesterday there were more than 300 earthquakes the most even since the first days of the eruption.

[jand]

I have prepared a small diagram of the entire eruption seen from the LP03 sensor where you can see the arrival of different magma pulses, starting from the first, about 8 days before the eruption point opened, with rises of vertical deformation About the conduit they affect to deformation about every 7-14 days and how the activity changed, but the trend is down.. and today there is no... that's why there is no intrusion, tomorrow we'll confirm to see if it goes up or not, giving us a more defined and concrete idea of the matter and whether more magma pressure comes or not. (Enrique).

[jand]

La Palma volcano eruption update: eruptive and seismic activity increase
Wed, 17 Nov 2021, 19:31

After almost 2 months of continuous eruption, there are no signs it might end soon. On the contrary, the activity - both external and internal (seismic) - has continued to intensify today again, with strong ash emissions during extended phases and more surface lava flows near the vent as well as downslope. Volcanic tremor has been increasing, suggesting that the rate of magma flowing towards and erupting at the surface also has become higher again.
This new surge of lava reactivated the flow front that stalled between Montaña Todoque and La Laguna. Other flows are active on top of the lava field near the vents, while the bulk of lava seems to be reaching and increasing the new combined lava delta at the coast.


https://www.volcanodiscovery.com/lapalma...ivity.html

[jand]

How big is the emission of sulfur dioxide (SO2) into the atmosphere due to the current eruption process in Cumbre Vieja?
Research conducted by scientists from the Volcanological Institute of Canary Islands (INVOLCAN) and the University of Manchester (UK) reflect that the amount of sulfur dioxide (SO2) that has emitted to the atmosphere the eruption of the Summit Old 2021, during its first 59 days, it is practically similar to the amount of sulfur dioxide (SO2) generated by human or anthropogenic pollution emitted to the atmosphere by the 28 member states of the European Union during the year 2019.
On the other hand, if we compare these broadcast data for the same time period (59 days), the amount of sulfur dioxide (SO2) emitted by the volcano is 7 times higher than that emitted by the 28 European Union member states during the year 2019.

[jand]

Record number of earthquakes in one day on La Palma since the eruption began
The Island has registered 249 earthquakes, close to the record of 270 that were registered on October 24
- The eruption of La Palma mutates again and there are more earthquakes, ash and toxic gases

La Palma has registered 300 earthquakes this Wednesday after two weeks in which the number of earthquakes was below 100 per day, with which, without finishing the day (10.00 pm), it already exceeds the maximum observed in the two months of eruption , which was established on October 24.

This rebound occurs when, for several days, there has been a downward trend in various indicators of the volcano's activity, including seismicity.

In fact, the total number of daily earthquakes had fallen below the 200 mark since October 28 and had been below a hundred for almost a week (since November 11).

The maximum earthquakes of this entire volcanic crisis occurred days before the eruption began, on September 14, with more than 300.

At that time, a third of the movements had magnitude less than 2, while the rest were located at values ​​of 2 to 3.

This Thursday, two thirds of the earthquakes are in magnitudes of 2 to 3 and the remaining third, from 3 to 4, with an Earthquake above 4.

The different scientific bodies that monitor the eruption are collecting different data to find out if what happened this Thursday is a specific rebound or announces a change in dynamics in the volcano, after days of apparent downward activity.

Posted on November 17, 2021 - 8:34 p.m.

https://www.eldiario.es/canariasahora/so...RJEHYL1RFc

[jand]

Domínguez (IGN): "The upturn in seismicity and tremor may be indications of a rise in the activity of the volcano"
The seismologist from the National Geographic Institute indicates that a new lava intrusion is still being ruled out at a point other than the emission centers in the Cabeza de Vaca area
- The La Palma volcano is "quite" explosive again, as in October

The upturn in seismicity and tremor could be indications that the energy of the La Palma volcano, in its descending phase in recent days, could rise again, according to Itahiza Domínguez, a seismologist at the National Geographic Institute (IGN).

Speaking to Efe, Domínguez explains that intermediate seismicity, with a hypocenter between 10 and 15 kilometers, dropped notably four or five days ago, although the deep one remained.


The thing is to see if it is maintained or not. Many times it works in pulses of several hours. If it continues like this, we could reach maximum levels at the end of October," he warns.

As for the tremor signal, he points out that in the last hours it has been at values ​​of the beginning of November, "when it had given the first lows".

The deformation of the terrain remains unchanged.

What could this rebound in seismicity indicate?

Itahiza Domínguez indicates that it probably has to do with a feedback of the system with magma that comes from greater depth.

The earthquakes in intermediate depths, whose rebound is the novelty in these last hours, have a relationship with the flow of magma that comes from the island's crust and are related to the activity on the surface, explains the seismologist.

"We do not know if there will be important changes on the surface. It has not always been the case. There may be greater emission of picoclasts, lava or if it will end up affecting the cone, which is the greatest concern", since a new recomposition could change the direction of the coladas, wielded Domínguez.

It can also manifest itself with an increase in explosiveness and ash emission, as has been happening since Tuesday.

What is still being ruled out is a new lava intrusion at a point other than the emission centers in the Cabeza de Vaca area.

"In the end, all this has to do with the changing tonic of the eruption and the volcano may have a new pulse, although we would not reach the levels of other phases," Domínguez slides.

"Lately we have been saying that the energy goes down, but it could go up again," he concludes.

LABELS
La Palma Now
Posted on November 17, 2021 - 12:28 p.m.

https://www.eldiario.es/canariasahora/la...97990.html