Volcanic activity in Canary Islands 2019

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Translated.

Tenerife records 500 small earthquakes in less than two hours
EFE Las Palmas of Gran CanariaJune 15 2019
Tenerife records 500 small earthquakes in less than two hours

https://estaticos.efe.com/efecom/recurso...-P-3d-P-3d

Graphic facilitated by the Canarian Volcanological Institute (Involcán) showing the small earthquakes detected this afternoon around the Teide in just under two hours. EFE


The Canary Seismic Network has registered this afternoon more than 500 small earthquakes in Tenerife in less than two hours, as reported by the Canarian Volcanological Institute (Involcán), which attributes them to the possible "injection of magmatic fluids" into the system of the Teide.

This "seismic swarm" was observed between 17.09 and 18.50 hours this Friday (Canarian time) and has characteristics similar to that recorded on October 2, 2016, when more than 700 small earthquakes were recorded in the Teide environment.

https://www.efe.com/efe/canarias/medio-a...p0bxDWm4QM

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Early this morning a 2.7 Earthquake a 3.8 Earthquake a 2.4 Earthquake.

es2019hccpp 15/06/2019 00:51:44 01:51:44 28.6879 -17.1442 2.7 mbLg ATLÁNTICO-CANARIAS


es2019hcdek 15/06/2019 01:29:48 02:29:48 29.3195 -16.2972 53 3.8 mb ATLÁNTICO-CANARIAS


es2019hcfaj 15/06/2019 05:16:55 06:16:55 29.2309 -16.4251 1 2.4 mbLg ATLÁNTICO-CANARIAS

http://www.ign.es/web/resources/volcanol...arias.html

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The sound of the Earthquake swarm 14th June.

This is the sonification of the event of long period Events, registered by the Canary Seismic Network between 17:09 and 18:50 hours yesterday 06/14/2019 (Canarian time). You can hear 3 hours of seismic signal, from 16:30 to 19:30 , reduced in just one minute. The hundreds of long period Events are clearly heard.


https://www.youtube.com/watch?v=CXC4untv...4mEi_K81zk

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Latest update courtesy of Enrique.

Translated.

Summary of yesterday's seismic swarm. As long as the long-term earthquakes or "LP" continue in the center of Tenerife and some more scattered by the archipelago, Canary Islands, Spain.- weekend and we return to the informative blackout of the ign that has left us a swarm with more than 500 Small earthquakes and with seismic that continues their march. What will the pevolca do, should meet and make a statement, make decisions or measures if you see it convenient or not.

In short in my personal opinion, I believe that in accordance with the current legislation of its own decree approved on July 30, 2018, it would have to be seen and confirmed the state of the volcanic surveillance light, whether or not to raise drills to know that Do, propose or not an increase in surveillance, plan and organize or not talks of volcanic education, etc) but at the moment no one knows, for the moment there is nothing of anything. We'll see if next week.

Today there are several earthquakes without locating, some localized automatically with more or less success or misdeed (the 2.7 of 0:51 h UTC today seems to be in the caldera, not where they have put it) that we will have to analyze When you put the revised results on Monday or Monday afternoon.

From what happened yesterday, on social media as twitter is talking about the similarity of signs with others that are already known from other volcanoes that have done similar things, in this case is the volcano volcano and its already famous touch of drums (Drumbeat) he did in April 2015 and whose summary begins like this.

" Long-term (LP) Long-term earthquakes have been described from several andesíticos and dacíticos volcanoes, which usually accompany the rise and increase of the effusion (surface eruption) of viscous magma. However, the processes that control the occurrence and characteristics of the period between tremor and tremor, known as drum and lp earthquakes in general remain controversial.
In April 2015 after 17 years of eruption in progress. After four days of high levels of continuous tremor and "pressed", highly periodic lp earthquakes appear for the first time on April 10th. (see the last figure of the seismogram mentioned in white and black compared to that of involcan that is in several colors) "...

The summary is completed with this conclusion: " observations increase the phenomenology of drum lp earthquakes and suggest that in the tungurahua volcano they are the result of the gas flow and the rapid controlled pressurization of it by the failure that has been opened and the touch From the margins of the column with the ascending magma."

But we went back to Tenerife, yesterday, past four and a half of the afternoon began a new seismic swarm in the area of the central caldera of the teide-Pico Viejo System, on the island of Tenerife of which some 80 Events have already been located Of the more than 500 that occurred.

The Swarm had as a prelude an Earthquake at 14:28 hr, the ign assigned it a magnitude of 1.9 and located its hypocenter at 12.8 km deep, placing its epicenter a few 5 km to the so of the crater of the Old Pico Volcano. This Earthquake has now been the most energetic of this series.

A little later, about four and a half began to appreciate in the spectrogram of the seismic station Maci, a series of signs indicating the beginning of a seismic swarm. A lot of vertical signs began to appear all very together, almost overlapping each other. This clustering of seismic signals is sometimes known as "tremor tremor".

Earthquakes were happening at a rate of four or five per minute, coming to be counted in an hour and a half more than 500 Events. The series stopped on six in the afternoon, with two new earthquakes a little more energy; from 1.2 and 1.6 to 12 km deep. Most of the earthquakes did not reach magnitude 1.0 and its average depth is 14 km.

I invite you to listen to it in this accelerated audition put by the involcan where you hear it as if it were a metal bar crunching before you split until it's part. It's awesome:
https://www.youtube.com/watch?v=CXC4untvHkA

In the analysis of seismic signs we see how in the wave form the arrivals of the p and s waves are appreciated, while in the spectrogram we see as the signal marks above all on low frequencies.

And highlight like yesterday that for the ign these earthquakes are hybrids, while for involcán they are long-term Events. Even in this they agree, although in my case I have it very clear, these are long-term Events when fulfilling all their requirements

Yesterday I tried to explain it, but as in the spectrogram and seismograms of the ign do not appreciate the earthquakes, attached a series of graphics with data from maci where we can see:

- Seismogram and spectrogram of the whole swarm, period of time: 16:27 ~ 18:05

- graphic where we appreciate in more detail the signs of wave and spectrogram. We see how every minute occurs between four and five earthquakes.

- analysis of the seismic signs of the 14:28 hr event. The ign assigned him a magnitude of 1.9 and located him 13 km deep. It shows wave form and spectral analysis of the signal both in spectrogram and in energy distribution as often.

Figures:
- public data of the station station served by the usgs and visualized by Isaac.
http://ds.iris.edu/ds/nodes/dmc/tools/st...k/IU/MACI/
- Map of the Earthquake viewer in the Canary Islands of the ign on which it has been interpreted what is happening in Tenerife, drawing the area of the swarm, the main alignments and the efforts.
http://www.ign.es/web/resources/volcanol...arias.html#

Source Tweet Tunguragua:
https://twitter.com/AndyFBell/status/113...8078821381


DECREE APPROVAL PEVOLCA:
https://www.iberley.es/legislacion/decre...a-25989741

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Tenerife seems to be still having micro swarms example between 1700 - 1800 this afternoon.


https://www.ign.es/web/ign/portal/vlc-se...hora=17-18

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Enrique has commented that volcanodiscovery.com have updated about all the activity.

Translated.

"By the way these things make change and improve things, so it's time to warn of an improvement, in one of those portals, the volcanodiscovery.com have finally included the data of the complete catalogue with all earthquakes in the Canary Islands, - including The children of 1,5-which gives a result like the one we showed on their day in avcan (it was a great tool and that made in lack) and that gives us account of the seismic swarms and their depth. In the chart you appreciate the last two with a grouping of yellow earthquakes, the old peak of the past day 14 and the deep that we had in front of the shores of güímar at the first of the month. (Enrique)"

https://www.volcanodiscovery.com/tenerif...9-jun.html

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Possibly more LP earthquakes today between 1200 - 1300 and 1400 - 1500.

https://www.ign.es/web/ign/portal/vlc-se...hora=12-13

https://www.ign.es/web/ign/portal/vlc-se...hora=14-15


https://www.ign.es/web/ign/portal/vlc-se...hora=14-15