Volcanic activity in Canary Islands 2021

[jand]

https://twitter.com/RTVCes/status/147120...70606?s=20

[jand]

https://www.theguardian.com/world/galler...n-pictures

[jand]

Continues eruptive activity on the island of #LaPalma (17-12-2021 09:00 UTC)

➡ Since the last statement, a total of 96 earthquakes have been located on the island of La Palma, two of which have been felt by the population.
➡ The maximum recorded magnitude is 3.5 (mbLg), corresponding to yesterday's Earthquake at 22:29 UTC, 36 km deep. The minimum magnitude of the localized Earthquake was 1.1 mbLg.

➡ The localized seismicity continues under the central area of Cumbre Vieja in the same areas as in previous days. The earthquakes are mostly divided into two groups, 46 of the earthquakes are located between 8 and 16km deep and 47 earthquakes at a depth of more than 30km. Also, 3 superficial earthquakes have been located in the area, with a depth less than 3km.

➡ In the last 24h, volcanic tremors continue without being observed in the records, maintaining the seismic noise in levels next to the pre-erruptive period.

➡ From the cessation of the volcanic tremor signal on December 13 at 22:20h, low frequency (LP) Events continue to be detected in addition to localized volcanic earthquakes.

➡ The network of permanent GNSS stations of the island does not show significant deformations that can be associated with volcanic activity.

➡ In view of the image calibrated at 08:45 UTC, no broadcasts are appreciated.

➡ The height of the cone is measured getting a value of 1.122 m. above sea level.

🌋 The IGN continues its presence on the island, where the CAVE (Center of Attention and Eruption Surveillance) has been established, maintaining, denensifying and improving the surveillance network.
🗞 Full story:
👉 https://bit.ly/3GPnroy
#IGNSpain #Terremotos #SerieSismica #Canarias #ErupcionLaPalma #volcandelapalma #VigilanciaVolcánica #LaPalma

[jand]

17/12/2021 - 20:00h Canary Islands. - SEISMO ACTIVITY-VOLCANIC IN TWO ZONES OF THE CENTER OF TENERIFE, THE CALDERA AND ITS WEST SIDE IN THE ADVANCE AND GUIDE ZONE. -
These days it's been almost a monographic of La Palma, Today quiet for more than 3 days, let's hope it falls asleep and it's not a nap, but there are more things. I've been with an eye in Tenerife for several days and it's that the Capitalina island presents seismic activity about 6-8 km in the area of Adeje and about 8-11 in the area of Caldera and guide of Isora. Well, this is what is known through the IGN earthquakes, which has located about 11 in the area in 15 days. But when the venda is separated, it turns out that in 14 days there are 59 located by Involcan in the same areas.

This is not new, it is the activity I already highlighted in post 593 a few days ago where I remember that it is the continuation of something that started 5 years ago and that we have already had stronger swamps in that area, in October 2016, November 2017 November 2018, July 2019, December 2020 and more.. We can go back to 2004, even more so... since the 80s things have been located in the area, but there is nothing, nobody knows anything and much less what to do if something like what happened in the Palma happened in Tenerife. If it was worse on top, a scene like the last eruption of White Mountain, very explosive, so turn off and let's go, let's go parts:

First I present to you, again for those who don't know, this report on Tenerife, is very alive... and it could surprise us without any problem like the Palma has done, preparing to eruption by warning only a few weeks in advance.

https://www.ign.es/.../volcano.../pdf/20...nforme.pdf

If he went out for Adeje, of course we already know how it can be seeing what happened in the Palma, it's worrying, a VEI3. It would be a Stage 1
But geology gives bad news, it turns out that the central volcano of Tenerife is very large, the third largest on the Planet in volume, and is that the complex of the Teide-Pico Viejo Building, also makes eruption and are not basaltic eruptions always, most in that area are Phonolithics, much more explosive and of course more powerful than living in the Palma.

We're talking about an eruption to the height of the Vesubio had and that struck a pump, a VEI4-5, a plenary and of course if it would be a problem that no one wants to see and for what we are not prepared at all. I hope this never happens. Studies say the last time it was 2000 years ago, maybe something more recent... 1200 years ago... but happen, surely it happened. This would be a scenario 2, above which could come preceded by a scenario 1, it's tremendous Tenerife's recent geological history.

http://www.iehcan.com/.../uploads/2010/0...a_2010.pdf

Still editing the post (Enrique)

[jand]

[TamaraEnLaPlaya]

Hi jand
Neither of the links in the previous post seem to be active. Please could you check them? 
Cheers, Tamara

[jand]

First I present to you, again for those who don't know, this report on Tenerife, is very alive... and it could surprise us without any problem like the Palma has done, preparing to eruption by warning only a few weeks in advance.


https://www.ign.es/web/resources/volcano...ysFQNgaoB8

[jand]

We're talking about an eruption to the height of the Vesubio had and that struck a pump, a VEI4-5, a plenary and of course if it would be a problem that no one wants to see and for what we are not prepared at all. I hope this never happens. Studies say the last time it was 2000 years ago, maybe something more recent... 1200 years ago... but happen, surely it happened. This would be a scenario 2, above which could come preceded by a scenario 1, it's tremendous Tenerife's recent geological history.


http://www.iehcan.com/wp-content/uploads...yBMozETW98

[jand]

Tamara hopefully these links in the above posts should open now ok . Jan

edit by Tamara: yep, great thanks Jan.

[jand]

La Palma Volcano remains calm, but small quakes continue
Update Fri 17 Dec 2021 16:45


For 3 days, no eruptive activity has taken place, and the likelihood that the eruption is actually over is clearly increasing. The cone only shows mild degassing and no lava flows are active any more.

Official confirmation when the eruption is declared over will likely need to wait a little longer. Some doubt remains as to the significance of the continuing Earthquake activity: although of low energy and overall on a decreasing trend, it remains significant, and could indicate that magma at depth is still able to pressurize and fracture rocks at depth and create intrusions that might eventually allow it to rise further. However, this is far from certain - it could also be adjustments of the system triggered by the massive shifts of masses that has occurred during the eruption. In the latter case, the quakes should slowly die out.

During the past 24 hours, there were 3 quakes of magnitudes 3.3-3.5 at 35-36 km depth, in addition to many more smaller quakes (22 quakes of magnitudes 2.0-2.9 and 48 quakes below magnitude 2.0). If looking at the various maps published of recent quakes, it might seem that there is a a strong increase of quakes. This apparent increase, however, is mostly in the number of quakes, especially for those in the deeper region around 30-40 km. This is mostly an artifact caused by the absence of volcanic tremor, which acted as noise during the eruption and was simply hiding smaller quakes in its signal. Now, the very sensitive seismic devices are again able to pick up very small quakes below magnitudes 2, as well as quakes deeper down (whose signals at the surface are much weaker). In other words, most of the apparent increase of quakes is only an increase in detection sensitivity. Still, a weak increase in the total energy of the seismic activity remains visible for the past 48 hours or so. With most likelihood, it is part of a normal fluctuation, but nobody can be sure.

https://www.volcanodiscovery.com/lapalma...ml?refresh