Volcanic activity in Canary Islands 2021

[jand]

AS A FOOTNOTE THE Earthquake M4.0 was revised to a M4.3:

4.3 mbLg SW VILLA DE MAZO.ILP 2021/10/10 21:46:27 III-IV 39

[jand]

The earthquakes have been ongoing.

All can be viewed on the link below.

Interesting two small earthquakes on land West of Tenerife one only at 4km depth and one at 15km depth

1.1 mbLg E ISORA.ITF GUIDE 2021/10/10 23:49:31 4 + info


1.4 mbLg SE SANTIAGO DEL TEIDE.ITF 2021/10/10 21:08:06 15 + info

http://www.ign.es/web/resources/volcanol..._KxSOqQ0A8

[jand]

I leave you a figure with what the spectrum says, the spasmodic tremor, the appearance of a lot of noise at 18 Hz on spectrums, in the form of a typical band of depressurizing deep fluids around 10 km. The volcano is also making a lot of noise due to gas depressurization in the 5 and 8 Hz line and the magma by frictioning with the conduit walls at frequencies between 0,5 and1 Hz... let's go spectrum tells me everything. (Enrique)

[jand]

The M4.3

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The depths are getting more shallow.

3.3 mbLg NW FUENCALIENTE DE LA PALMA.IL 2021/10/11 06:26:44 7km depth.


http://www.ign.es/web/resources/volcanol..._KxSOqQ0A8

[jand]

La Palma continues to register major earthquakes
This Sunday night an Earthquake reached a magnitude of 4.3 in Mazo, with an epicenter at a depth of 39 kilometers

The National Geographic Institute (IGN) has located several dozen earthquakes on the island of La Palma in the last few hours. There were 21 between 00.01 and 06.39 hours this Sunday, the most prominent one at 01.57 hours southwest of Villa de Mazo of magnitude 3.8 and a depth of 34 kilometers. During the rest of the day, tremors continued, registering one of magnitude 4.3 at 9:46 p.m., as the IGM has confirmed on its social networks. It was near Mazo, 39 kilometers deep.

The number of earthquakes registered in the early hours of Sunday was practically half that of the night from Friday to Saturday , when a quarantine of movements were reported, the largest also southwest of Mazo but of 4.1 degrees.

The 'seismic swarm' remains active in the south of the island, in the municipalities of Mazo and Fuencaliente, and average depths that range approximately between 11 and 15 kilometers, although some have also been recorded at more than 30 kilometers.

On the other hand, the average intensity of the earthquakes is around magnitude 3 -some slightly above and others below- . However, tonight there have been 3.5 movements in Fuencaliente -at 04.46 and 14 kilometers deep- and even a 3.1 Earthquake at 06.39 hours in the sea to the southeast of the island, practically halfway of the distance between La Palma and La Gomera.

However, seismicity continues to be located, as in recent days, at a great depth and no deformity of the terrain has been recorded outside the volcano area.

As for the eruption, it continues to maintain the same behavior as the previous days with a volcanic explosiveness that continues at level 2 on a scale with a maximum of 8.

[jand]

La Palma volcano eruption update: high lava effusion rates, new lava arm at the sea, speculation about seismic activity


Today, the eruption continues with steady lava fountaining from the lower vent and strong degassing and ash emission from the upper vents, but is much less noisy compared to yesterday, to the relief of people living in the area many of whom were terrorized by the extreme noise of the eruption in recent days.
The decrease of sound intensity is however not an indication of what state the eruption is in its deeper underground. It is mostly reflecting how gasses can escape and interact with the ambient air at the very surface. The decrease of eruption sound is likely due to an enlargement of the upper conduits after several collapses and other changes occurred at the vents, which now are in a more stable configuration to allow the passage of magma in a more unobstructed way. It probably has no significance as to the eruption's effusion rate, which continued to be very high. The past day's activity changed the morphology of the main cone quite a bit, by accumulation of falling material from the mountains, as well as overlapping lava flows.
The result is that the cone overall grew significantly and most lava now is going into the northern flow, which has been following the northern margin of the flow field, causing lots of additional damage in the past 48 hours. It reached the sea last night around 22.55 p.m., after passing north Montaña de Todoque (the cinder cone near Todoque, already half circled by lava flows on the southern side).
Lava threatens La Laguna
Forming a rather narrow front, its rate of advance was very fast, at about 500-700 m per hour. It is now hoped that its channel or tube system will remain stable to direct the lava straight into the ocean instead of widening the flow or branching off, which would put the town of La Laguna at risk.

Seismic activity shows worrying signs
According to a post of a geoscience page VolcanesyScienciaHoy on facebook based in Tenerife, the current seismic activity points towards that more magma is moving upwards, as indicated by 3 factors:
- several earthquakes appeared at depths less than 7-8-9 km;
- after the 4.2 quake two days ago, there have been episodes of spasmodic tremor with many earthquakes in a row that indicate movement of magma in depth;
- since yesterday, the appearance of strong volcanic tremor at around 18 Hz frequency thought to be caused by depressurization of fluids at great depth around 10 km;
If these interpretations hold, there should soon be noticeable ground uplift visible in the GPS stations (which, so far, is not the case). What will next happen, when this new magma pulse reaches the surface, is unknown. In the best scenario, the current conduits will continue to cope with it and the magma will erupt from the existing vents. In the worst scenario, magma could open new fissures in a different area, even after another potential pause of the eruption should it occur. In a scenario in between, new fissures might open near the existing vents, and new lava would erupt onto existing lava fields.
No one can predict the future, but for sure the evolution of the eruption will be a highly interesting one and the experience intense for everyone involved, in one way or another.


https://www.facebook.com/groups/vulkane....002881638/

[jand]

Latest update courtesy of Enrique.

10/10/2021 h Canary Islands.- LA PALMA ISLAND ERUPTION.- ERUPTION KEEP GROWING, RAYS APPEAR IN ERUPTIVE COLUMN. THE COLLADA HAS STOPPED JUST BEFORE HE REACHED THE OCEANO.- This is not good news as it means the eruption is intensifying to the point where the ash is so thin and comes out so hard that its own grazing produces burdens Static and ultimately lightning occurs in the eruptive spine. Right now we have a strombolian eruption (VEI2), but with very explosive phases, very close to the VEI3), but without getting hairy, it has to exceed 5 km in height of eruptive column.

If it was already scary now it's already an eruption that doesn't have to envy the biggest ones. When Pliny the Elder described the Vesuvius eruption for the first time, the hardest part to believe was these lightning strikes. So much so that he died watching the eruption and his final stories came to us through Pliny the Younger. Hence the name of Plinian eruptions (VEI4- 5) that we have not yet come to of course. The Guanches also included lightning in their Guayota, Magec and Achaman legends. Don't miss the video.

VIDEO OF THE RAY.
Earthquake... we should add the possibility of another maximum at 12 h 25 min and 24 h min of it, i.e. 10.10 IGN , the 11:10 h Canary Islands, 12:10 h peninsula. and then tonight at 22:36 h IGN, 23:36 h Canary Islands, 00:36 h peninsula.

We'll see what happens.
es2021twzvu 22:46:27 10/10/2021 21:46:27-28.5856 17.8256 mbLg III-IV SW MAZO VILLA. ILP

On the energy curve, we are below the straight that marks the seismic energy emission rate, indicating that it has to regain the lost ground if it continues to pressurize, so it will move again with some 4 + Earthquake in the next few hours.

DEFORMATION:

For the island inflates or lifts upwards from yesterday in 1-2 cm, both in LP03 and LP04 in the west of the island, and deflates in the east, indicating that the magma moves from east to west from the swarm deep, almost nothing.

http://www.ign.es/.../vol.../html/PA_ser...10911.html

I keep editing the post. (Enrique)
https://www.meteovigo.es/.../1772

https://external-lcy1-1.xx.fbcdn.net/saf...WO-ktgqcq5" />

[jand]

At the power curve, we're below the straight, indicating you have to regain the lost ground if you keep pressurizing, so it will move again with some 4 + Earthquake in the next few hours. (Enrique)


https://www.volcanodiscovery.com/la-palm...quakeTable

[jand]