El Hierro

[jand]

http://212.170.244.196/

The stain is looking really prominent and wider this morning on the above webcam link.

[jand]

Volcanocafe copied.

The tremoring has picked up again, to levels not seen for over a month. Earlier today we had signal clipping for period, so do not be surprised if the signal is rescaled again.

As I wrote yesterday that activity at Bob would pick, so has happened. It seems that Bob today is mainly producing a lot of tephra or grained pumice. So far I have not seen any pyroclasts bobbing about, and no steam. But the water is highly discolored (large stain), and there seems to be unusually large amounts of gas coming up to.

And this time the tremoring is increasing while Bob is having an episode of high activity. My guess is that this is due to new material having arrived, this is surmised on the activity of low frequency harmonics on several stations indicating a deep source.

[jand]

Volcocafe Copied.

Carl le Strange says:

 January 17, 2012 at 11:08


As I have said before about the authorities in question.
 They are not that good at volcanoes to begin with. Their greatest worry is about landslides happening. The equipment was initially mainly targeted at the possibility of a new landslide happening at El Hierro.
 Now they have corrected this, but they still only show the landslide data (GPS), and one SIL-station. I would also not be surprised if they have employed a volcanologist, and they have started to take in foreign consultants to help. Which is good.

So, to answer your question. Yes, I seriously think they believed that Bob was dead or dying in December. And I think this was a rather humbling experience for them to be proved wrong. We should note that other volcanologists and experienced volcanobloggers thought the same.
 Although there are no volcanologists commenting on here (as far as I know, even though I have one suspicion), together we make a fairly decent one, and we collectively do not miss much. So together, after all the commenting, seem to come up with a rather good concensus of what is going on.
 Wonderfull with loads of commentators and comments.

[jand]

Volcanocafe Copied.

A lot of activity under the surface again. The white stuff is floating everywhere and the seagulls are more active than yesterday:

http://www.youtube.com/watch?v=5GlbuKaHI2Y&feature=player_embedded

[jand]

volcanocafe copied.

The stain pictures from yesterday also were great. A lot of gases and ashes must be ejected. The flower-like pattern of the stains center keeps me wondering what the eruption looks like underwater. I do think it looks like this – with the only difference that the "branches" do not rise above the sea surface:

http://i1112.photobucket.com/albums/k499/sissel59/SurtseyanEruption2007jpgjpg.jpg

[jand]

This is interesting and relates to the map posted a couple of days ago showing the earthquakes forming a circle.

Avcan FB Copied and translated.

Henry and members of AVCAN; last night I copied a coseja of a book that many will know, and I see that you can have relationship with things that are happening:
Bernabé Moreno Ramirez copy: "before an eruption in the region sumital of the volcano Kilauea swells (tumescence), creating a structure of lifting circulr." This occurs as a result of the entry of magma which rises through the duct circular in the central reservoir. The pressure of the magma increases deforming and lifting rocks overlying in more than one metre. Finally, the resistance of these rocks is overcome and occurs the spread of docks to the top of the volcano or inject laterally within the rift zone. In fact, the majority of the magma is injected laterally and can flow more than 40 km. through ditches to rash in the form of lavas from the flanks of the volcano. As the magma is extracted from the reservoir, the internal pressure of the diminish, the upper part of the building undergoes a variable subsidence. "In some cases, the rocks that form the roof of the reservoir collapse widening the caldera that forms the Summit of the volcano" SPARKS, R.S.J. MARTí, j. and spider, V. (1993): the current volcanology. Madrid, CSIC, page: 34.
11 Hours ago
Then I did an aprecicación:
that is why I think that spoken both Henry the other day of the circular shape of the earthquakes in the interior of the island and spoke of that required both gravimetry and magnetometry etc, to understand if there is something well or not and why he also commented that it would have to ask if we have dikes, camera or what...
11 Hours ago
What do you think?

Reply

Bernabe... want to tell you... no more data can make a Bible of hypotheses based on few data have whoever to the believe and which not, because that... not us who have to say, but those who are managing is rash for the safety of all Islanders and Canaries. So that you understand this writing I'm going to leave a link very didactic process, then entenderas of that need more GPS data, Inclinómetros, gas, gravimetrias, magnetometrias, etc...


(http://hvo.wr.usgs.gov/howwork/subsidence/inflate_deflate.html(Enrique)

Enrique, thank you. This came to story because there was talk of advice to foreign experts and I said that there were many national experts who knew full well what could happen. The part of the chapter the copied so that would be that there were many scenarios studied already... The eruption of el Hierro, comparing with this article of the USGS and the part of the book, increasingly is resembling more "of the manual"; Although all we have caught a bit with an open mouth no background on the island... I wanted to look to be parallels with other cases, but then they do not exist, such that I am very aware of this and I have no authority to speak both of this... What disturbs me is that it belongs, outside your Association and Yes you have the necessary data, don't say anything.

[jand]

¨m agree with Carl about the last seismicyti was pressure related.
 But who was 1st the egg or the chicken?
 Are we talking there are randomize entries of magma or are we talking when there is some blockage the pressure feeds the microseismicity or seimicity making able news entries of pressure and magma feedeing eruption?
 My guess or my bet is the last option a feedback or pressure related as said Carl.
 My main doubt in this moment is if the actual spikes are showing us water reaction with lava fragmentation. If I saw the tiny lines spikes over the amplitude and the ashy brown colour my guess is this is dued by water reaction. In this moment with a good ration magma/water (showed by the continuos spark) But we are watching this ashy brown colour and we are watching too the green colour typicall of the gases of the own eruption... It seems each diferent hole is making diferent things o diferent eruptive phases...
 It would be very interesting when we saw the scientist´s flight to point above the sea surface and recognize what points of the volcanic building are making each thing (we had some vents and a fissure with emissions or fume).
 Instead my bet of future it does not mind it the actual situation is dued by the own eruption or it is dued by water reation when the actual eruptipe activity had some blockage then microseismicity or seimicity will bee shooted (pressure related) and eruption will be feeded.
 Feedback or pressure related.
 As Carls said inside this phenomenon all is one.

[jand]

Harmonic tremors have increased x 3.

http://www.ign.es/ign/head/volcaSenalesAnterioresDia.do?nombreFichero=CHIE_2012-01-17&ver=s&estacion=CHIE&Anio=2012&Mes=01&Dia=17&tipo=1

[jand]

This is long but interesting to read.

GeoLurking says:

 January 18, 2012 at 06:00

To:GeoLurking

Dear Sir,
 The Takeshi Sagiya's GPS data from El Hierro is not a public data and is related to a research project in progress. I would appreciate if you can delete the videos based on this information which it has been taking from Takeshi Sagiya web page without his permission. Thank you in advance for your collaboration.
 Nemesio M. Pérez (Scientific Coordinator INVOLCAN)

Reply

GeoLurking says:

 January 18, 2012 at 06:10

FYI.... Anything published on the web is in the public domain.

No passwords were compromised, no firewalls were breached. If it's not behind a firewall or secured, it is not private.

I'm yanking the vids in a few minutes anyway since it is pretty obvious that INVOLCAN wants to control the message about what you, the public see.

Best of luck citizenry of El Hierro... you're gonna need it.

Note to all, the GPS data was stale anyway.,. no great loss.

Reply

Hattie says:

 January 18, 2012 at 06:22

Hey Lurking, maybe I am taking things the wrong way, but to me Nemesio Perez comes across like a control freak. He has made himself look pretty bad.

Reply

GeoLurking says:

 January 18, 2012 at 06:29

That's why I feel for the people of El Hierro. Until now I just figured is was some idiot bureaucrat. Now I think these guys are actually out to harm people.

Hattie says:

 January 18, 2012 at 06:41

It's crazy, the peoples safety is first and foremost. I am a bit stunned over this.

GeoLurking says:

 January 18, 2012 at 06:19


I'm also sitting here discussing this with a professional contact that I know ... and the question of "why now?" comes to mind.

All the GPS vids that I had showed something ... 'not nice,' is going on under Tanganasoga's north slope.

Is it because I am curious and searching for thermal anomalies?

Dunno, time will tell.

Reply


Birgit says:

 January 18, 2012 at 07:05


Whatever might be up. Dont take it to heart. We here appreciate very much what you are doing, and i dont think anyone could do anything if you use public data. This secrecy is really getting ridiculous.

Reply




Nosey Nelly says:

 January 18, 2012 at 07:02


OMG .... no way? REALLY?

Reply




GeoLurking says:

 January 18, 2012 at 07:08


Now I ruminate.

I have been apprehensive about doing so.... mainly because I did now want to cause an uproar over my non-professional and not geologist background.

As I noted, in those GPS plots that I did, one common thing coupled them all together.

Tanganasoga

Very early in the swarm, I noticed a hole in the quake plot. I didn't think much of it. It was almost perfectly round, and it extended down into the middle of the swarm that was there at the time. My interpretation was that it was tough old material, probably a remnant or artifact from the original El Golfo volcano.

Isn't interesting that most of the deformation from my IGN sourced lateral offset GPS plot... had most of the deformation on either side of that "non quake circular area?"

Based on that last GPS plot (which did not use the buggy Sagiya data) my interpretation was that something... (probably magma) was at a shallower depth. This region is well into (or possibly above) the Jurassic era sediment. From experience, we know that this layer is much more silent than the oceanic crust, which seems to have no issue making a quake when the pressure is right.

If I am correct... I would be a bit worried if I lived along that region of the island. I would be demanding that the officials get of of their lazy self obsessed asses (yeah, I said asses) and look into what is going on.

If I am right, and they are hiding information... they are gonna get somebody seriously hurt. All it is going to take is for a vent to open up almost directly on top of that "chamber" and it's going to take whatever flow is headed south of La Restinga, and push it right up the shortest path.

Again, I caveat this with the fact that I am not a geologist. But I am a pragmatist. That is the logic of the situation.

Not saying it's gonna happen... but if it does, good luck.

Reply




GeoLurking says:

 January 18, 2012 at 07:37


In a way, I feel a little bit honored. Sure it used Sagiya's data... and if he wanted it private the why was he waving it on the internet like an appendage that he was proud of?

I brought attention to it, and if you are waving your appendage at people, it's pretty ovious that you want someone to look at and admire it's ridgid beauty...

Eh, no biggy. I bashed him pretty hard for the odd sequencing of his not very well ordered timestamps. I should have expected it.

Reply


Diana Barnes says:

 January 18, 2012 at 07:38


http://www.ign.es/ign/head/volcaSenalesAnterioresDia.do?nombreFichero=CHIE_2012-01-18&ver=s&estacion=CHIE&Anio=2012&Mes=01&Dia=1

Some mighty large Bob wobbles ..... tremors this morning to greet the new day.(Yes! I KNOW the tremors are not really from Bob ...but well it sort of makes things easier to describe when activity is shrouded in mystery)
 Iceland is also quiet. A small swarm near or at Hengil. Askja area also has seen a small activity.
 Now for my Link Pick of the Day.
 This is a series of posts by the Men ( and women) who know. There are several Pages each dedicated to a possible type of doomsday scenario ranging from evidence (or lack of ) of Giant Asteroids to the tiny diatoms and viruses. (Most involve some form of seismic or volcanic activity so not really OT )
 This will either increase your paranoia or give you the healthier option of marvelling that the human race has made it this far in the complex systems of space and earth.
 I suggest you read Dr Erik Klemetti's excellent article on Yellowstone (http://www.wired.com/wiredscience/eruptions ) before you go for the full Monty here !

http://www.wired.com/wiredscience/2012/01/scientific-doomsday-scenarios/?intcid=story_ribbon.

Reply

[jand]

Betty says:

 January 18, 2012 at 08:02

Makes no sense to me. Is it still there? Perhaps, at the time it was public, it did not mean anything in particular to him, but now...interesting how they would worry about this now...perhaps you have beat him to something...we'll have to read the paper to figure it out.

This may not mean much to you, but I am proud of you. You did it for nothing, because you searched for the truth of it.

Reply


GeoLurking says:

 January 18, 2012 at 08:11


Even if I beat him to "something" he did the heavy lifting and collection of data. I respect that and so I pulled the vids.

My only goal is to find out what is going on since the people in charge are either clueless or maliciously silent in order to protect (apparently) tourism.

Nah, doesn't matter if someone gets hurt.... keep them tourists rolling!

Reply

[jand]

Harmonics have really picked up again today even more than yesterday.

[jand]

GeoLurking says:

 January 18, 2012 at 08:48

Yet another funny... as in "Hah!"

My last stuff, the statics used in the "rapid gps" post.... only used IGN data. The same thin for my 750k cubic meter per day estimate... and my amateurish Mogi model. All from IGN's gimped gps info. (Lateral offset only).

In fact, I quit using Sagiya's data almost two months ago... after he yanked the text files when I berated the sequening.

Carl le Strange says:

 January 18, 2012 at 09:21

@Betty:
 This blog follows 2 sets of data.
 1. Swedish Law: According to Swedish law all data by all institutions of governmental nature is legal to do anything with and publish as long as they are attributed. Exception is if it is classified data. This data is not classified by Swedish Authorities. So, it is legal to publish.
 1. EU Law: According to EU law all oublicly available data by all institutions of governmental nature is legal to do anything with and publish as long as they are attributed. Exception is if it is classified data. This data is not classified by the EU parliament. So, it is legal to publish.

I do not in any way care about other laws. Anywhere, or for any reason. So I can by King, God & Law publish what the hork I want, whenever I want. And Nemezio Perez can kiss his hairy opening at the lower end of the alimentary canal through which solid waste is eliminated from the body!

Information wants to be free! *Raising fist*

Carl le Strange says:

 January 18, 2012 at 09:15

Uhm...
 Two small points here.

1. I think that the data is not belonging to INVOLCAN. It belongs to the University of Nagoya.
 2. If it does belong to the INVLOLCAN it is by EU Law Public Property.

Nemezio Perez is either way lying. As usual.

[jand]

GeoLoco says:

 January 18, 2012 at 08:45


In fact I always thought that everything points to a Tanganasoga eruption. It came out more clearly when the chugging began some weeks ago. From the beginning on we had some talking about the possibility of magma rising and finally finding a way up through the old pathways ans so on. Then came Bob, which effects are the clearly unpredictable element in the whole stuff. The "valve-effect" can be so massive that it "replaces" the eruption that was preparing, as it could only make it last longer until the bang on the island happens. I was even called a scare monger because I keep stating that living on an active volcano is a bad idea... It's like everything in life – as long as everything goes well, everything is good. But at the slightest step out of the right way, the whole thing might got towards sh... El Hierro is a volcano, and this volcano right now is active. Prediction on this kind of beast has got much better in the last years, but still has nothing 100%y... So it's a matter of logic and prevention / precaution to be very, very carefull – becaus volcanoes are beautiful from far, but bring death from near. Just a fact, no scare-mongering. Those who can't accept that have a problem my 4 year old daughter has solved: she knows that Hello Kitty is not a living animal...

[jand]

Nemesio M. Pérez


To:GeoLurking

Dear Sir,
 The Takeshi Sagiya's GPS data from El Hierro is not a public data and is related to a research project in progress. I would appreciate if you can delete the videos based on this information which it has been taking from Takeshi Sagiya web page without his permission. Thank you in advance for your collaboration.
 Nemesio M. Pérez (Scientific Coordinator INVOLCAN)

This is one of the greatest brain farts I have had the pleasure of mentally smelling. It is wrong on so many levels. First of all, it is not Nemesio M. Pérez that owns the GPS equipment. It is not INVOLCAN that owns the equipment. It is the University of Nagoya that owns it. So he does not have the right to claim, state, or ask anything. The one who could do it is Professor Sagiya, who happens to control the equipment.

Second of all, it is publicly published on the Internet. And as such it is free to use in Europe as long as his name is stated as the source.

Third, INVOLCAN, IGN & PEVOLCA is in the middle of an enormous crisis of trust. They have willfully misled people, blanketed out data, and done a wonderful job of trying to cover up their mistakes. And more over, they have been blatantly wrong in their predictions for the volcano at El Hierro so far. In most parts they are a risk for the safety of the citizens of El Hierro. The worst among their errors have been to declare the eruption to be dead without any proof thereof.

Nemesio M Pérez, Sir, you are just making an ass of yourself. Question is if it is out of jealousy? I would also like to state that by attacking GeoLurkings works, you are attacking a valued member of this community. Our little community (Blog) has 5 000 views on an average day. By going after GeoLurking you have attacked us all here. That is why I feel fine about writing a public post about your behavior Nemesio M. Pérez. And just so you know it, in here among the 5 000 daily views, GeoLurking is wildly more respected than you are. I hope you are happy about having lowered the opinion about your person quite like this.

Legal matters

Since the subject is up for discussion I will here state the position of this Blog.

I am a Swedish citizen. I am the duly appointed Publisher of this Blog. Under Swedish law I am protected by very strong publishing laws. Anyone who wishes to start a legal battle with me will have to do so in a Swedish Court of Law.

And by both Swedish and European law any information available from a Governmental Internet Site is fair game since it is Public material and as long as the source is given.

Any user who publishes here is automatically protected by Swedish Law. And I am protected by law to not give out names or email addresses for the users.

Anyone who tries to impinge on my freedom of expression, and my right to publish other peoples expressions will post haste be taken to a Swedish Court of Law. To put it bluntly, I can afford more lawyers than you can.

Personal note

The oppression of the Freedom on the Internet must end now. Also the willful suppression of scientific information from the Spanish so called "Competent Authorities" must end now. Information not only wants to be free, it must be free.

On an even more personal level I have another thing to say. I pay a lot of taxes and a part of them the Swedish Government sends to pay for the squandering Spanish Government. I just calculated how much of my taxes go to Spain. It is about the same as Nemesio M. Pérez yearly salary. I morally therefore feel that I am the one paying his salary. And since it is my money I feel free to say this. Nemesio M Pérez, shut up or I will stop paying you!

CARL

[jand]

Bobbi says:
 January 18, 2012 at 13:00

You have my total respect and support. There are some very smart people on this blog and I believe that is a big threat to some authorities who may be struggling with the knowing or not knowing what to do about Bob. They are showing their arrogance and/or incompetence.

Reply

[jand]

Picture of the stain this morning at 11:13 to show howmuch it has grown and spread.

[jand]

Carl le Strange says:

 January 18, 2012 at 13:22


I want to make a clearification.
 I have tried to contact INVOLCAN to make it possible for Nemesio to give a rebuttal, or make cleafications to the post.
 I have not succeded in finding contact info for INVOLCAN except for their Facebook page. I will for apparant reasons not write on a Facebook page.
 The homepage for INVOLCAN is non operational.
 http://www.institutovolcanologicodecanarias.org/

I just wanted you all to know this. I am not into taking pot-shots at people without giving them a chance to defend themselves.

[jand]

http://212.170.244.196/

On the above webcam the sea is steaming again (could be errupting hot rocks again) and there is a boat looking at it now.

[jand]

The harmonics are showing now short bursts of explosions.

[jand]

Carl le Strange says:

 January 18, 2012 at 17:59

That boat should go home quickly, the harmonics are going wild again.
 http://www.01.ign.es/ign/head/volcaSenalesAnterioresDia.do?nombreFichero=CHIE_2012-01-18&ver=s&estacion=CHIE&Anio=2012&Mes=01&Dia=18&tipo=2#

[jand]

This video regarding La Palma is in Spanish but you can still understand some of it and some is in English there are maps and photos .

The spanish scientists actually travel under the heart of the volcano cumbre viaje and its amazing to watch.

http://www.rtve.es/television/20120110/cuando-ciencia-amenaza/488644.shtml

[jand]

There have just been 2 earthquakes within 10 minutes of each other.

karenZ says:

 January 18, 2012 at 21:49

Yes, shortly followed by one in Atlantico Canarias:

1122117 18/01/2012 20:38:50 29.0582 -16.7019 38 2.2 mbLg ATLÁNTICO-CANARIAS
 1122116 18/01/2012 20:28:52 27.6768 -18.0398 16 2.2 mbLg SW EL PINAR.IHI

[jand]

Harmonics have been going crazy this morning and lots of action on the webcams.

[jand]

earthquake-report copied.

Update 19/01 – 11:38 UTC
 - Yesterday's title is still correct – heavy smoking lava balloons (not too many tough)
 - everybody has to same question : How deep is the vent at the moment ? Only IEO can answer. Mostly the results are suddenly showing up at the webpage of the Gobierno de los Canarias, the official website of Palo Rivera or in the IEO website in Madrid. Even the IGN is sometimes surprised about the appearing results

[jand]

volcano cafe copied.

Re El Hierro,
 the December issue of Nature Geoscience (yeah that "Nature") had a fascinating article on plume research that answered one question that always puzzled me, namely where did the trigger come from for all the seismic activity/magma genesis in the first place?
 There is a great review article by Weis, Garcia, Rhodes, Jellinek, Socates and Lurking, ok, just kidding, not Lurking, on Hawaii and the reasons why it displays two different magmatic signatures (the Kea trend and the Loa trend). If I understood it correctly this corroborates the second hotspot type put forward by Courtillot in a model he drew up a decade ago and discussed by Koppers (wow, all this referencing sure is tedious) elsewhere in the issue, that these superplumes originate from the core mantle boundary with 90% of the superplumes stalling out at the DII boundary but feeding isolated plumes in the upper mantle (which I guess also explains the spatial discrepancies of the Canaries that stretch over 300 km).

But as with every little insight on the way to Nirvana this just opens up more questions for me:
 1. If the trigger comes from a deeper source in the mantle, why was there no seismic signature marking its ascent?
 2. Is the ascending plumelet molten (I guess it would have to be otherwise we'd be waiting for millions of years between eruptions)
 3. If there is no signal for it, how can we know it has stopped feeding the magma stored under El Hierro – i.e. maybe Bob could keep spewing for years..
 etc.

And for the sake of completeness, there was another great paper modeling the chemical density of plumes from the core mantle boundary by Deschamps, Kaminski, Tackley and Lurking, no not Lurking.

Reply


Betty says:

 January 19, 2012 at 09:01


Oh, Bruce, I appreciate this post so much! It seems that I have been reading papers in just this arena. I was wondering about the trigger, and rolled around to papers on the geochemistry (based on the pretty colors in the Calm, Calm Sea, which the guy came and evaluated. ) Then, I got off track and started watching a science fiction movie about triggers for horrible storms...when I get back on track, I'll be able to discuss just a teensy bit of it. The heavy hitters here will have to do it until then.

Reply


Bruce Stout says:

 January 19, 2012 at 09:33

Thanks Betty, yeah, my eyes glaze over when I get to the geochemistry too.

Reply

Carl le Strange says:

 January 19, 2012 at 10:37

I will answer your 1 and 3.
 We have during the last hundred days (that I know about) had several instances of a very low frequency signal in three distinct frequencies. 0,259, 0,59 and 1,2.
 Thare have been picked up simultenously by almost all stations when it has been going, with the exception of CHIE. This low frequency sound artifact indicates a deep source compared to other sounds recorded. My hypotheis is that this is magma coming up through the feeding hotspot mantleplume.
 This episodes are often followed by other signs of magma arrival such as, increased harmonic tremoring and inflation.

[jand]

Carlos says:

 January 19, 2012 at 12:23
Curiosly the values of S02 this morning were the lowest I have seen over 1.6 So2.
 The last week with the "stability" So2 values was around 9. http://www.gobiernodecanarias.org/cmayot/calidadaire/tiemporeal.jsp
 There are many papers talking about desgasing and So2 values to predict microseismicity and eruption.
 Papers talking about microseismicity related to desgasing and I remember this paper talks about low So2 values previous eruption.
 To compare activity in specgtrogram there were some relevant dates of activy.
 The begginig october 10th.
 November between 5th and 25th. (I dont remember the exact period on november) and with the notebook is very tired to review screens.
 Finally the periode around december 10th-15th (I dont remember the exact date).
 As said Carl this frequencies were seen in the maxium periode of activity...
 Instead in the grat periode of activity around december the frequencies If I remember well were low around 3hz the red colour. (this periode of december was when the scientist said water was enterening in the conduits or tubes).

Reply

Carl le Strange says:

 January 19, 2012 at 12:27

I think that the SO2 is dropping on the island due to the gas being released out at Bob. It seems like Bob is the center of attention again.
 I would say that Bob is now having a full blown eruption phase again.

Reply

Carlos says:

 January 19, 2012 at 12:34

Yes Carl.... It seems is doing that full blown eruption.
 Thanks to bathymetry we could see in the activity of november 8th (on that week) was when Bob with the fissure associated to volcano eats the northern slope of the canyon and make different dynamics of building and destroy the volcanic building...
 With the notebook is very difficul to me compare if the actual activity seems more like october 10th or seems like the activity around november 8th (that week).

Carl le Strange says:

 January 19, 2012 at 12:38

Right now it is looking more like the period of full eruption and building up of the cone.

But the problem I have is that I think that Bob have quietly and slowly been building up the side that collapsed. So, now it would be nice to know the depth of the cone.
 If this keaps up it is though clear that the cone will be building rapidly once more.

[jand]

Avcan FB Copied

The truth is I think tamponade of the output by a small detachment in the crater or something through asi, and high tremor and seismicity tells us that magma has now to clear the output or seek another, by what it would be rare that opened another mouth in the vicinity and the tremor gave a sudden downturn. How much is coming out and his force frames, that is difficult to know... but seen so pretty (Henry).
about an hour ago · Like · 12

Current volcanic Canary Islands (AVCAN) Buenos days. It would be interesting to those who live in El Hierro, could tell if you're feeling some kind of special vibration to coincide with explosions, ruídos, blockages of ears, smells... It's always. And it is very important to know the area where this occurs, if it occurs. Thank you (Elena).

[jand]

Avcan FB Copied

That's another thing Bernabe... I think that could open a mouth for gases on the Canal, on the ground when this happens, forms a structure called a spatter cone, so that you do an idea, a structure that the most known is that of the cloak of the Virgin in Timanfaya, and when it would have released pressure sealing again...


What happens there is a problem, we are under water, the duct must be very narrow and pressurized so that water will not enter and if happens that, lowering pressure come the water into the Canal and would have more explosions at that point that could open another mouth, this time with everything to block the duct of magma flowing below (Henry).

Photo of the cloak of the Virgin near the islet of Hilario in Timanfaya (Lanzarote)
http://www.timanfaya.org/CentrosTuristicos/timanfaya/images/Timanfaya_mantodelavirgen.jpg

[jand]

El Hierro – Short Update

Posted on January 19, 2012by volcanocafe

Image by IGN. Hard clipping over at CHIE.

Between 11.00 and 12.53 the SIL-station at CHIE showed a very large increase in harmonic tremoring causin the signal to overload and clip. The pattern showed every sign of a full blown eruption happening down there. There have been reports of prolonged steaming from the same spot, and a lot of gas has been spotted coming up. I have also seen pyroclasts surfacing during the day.

During the last two days the temperature above the vent has increased in temperature.

This level of activity has not been since back when the eruption was at its previous peak. There has as the readers of this blog knows been quite a lot of activity at the volcanic vent known as Bob, as well as rapid movements indicating a succession of inflation and deflation periods happening under the Tanganasoga volcano.


Image by GeoLurking (Lurking). Slight decrease in distances between GPS stations on El Hierro following a phase of rapid expansion between them. Based on data from IGN.

The next few days might be very interesting for those who like to follow Bob south of La Restinga.

Wanted

GeoLurking (Lurking) has during the last days asked for thermal imaging, or satellite thermal images. If anyone knows where to find them, or have access to them, please inform him in a comment in here. We will all benefit from this in the usual plotted manner I am sure.

CARL

[jand]

El Hierro – Short Update (Updated)

Posted on January 19, 2012by volcanocafe


MAJOR UPDATE DUE TO IEO REPORT!


IEO has released a report on the bathymetric measurments. It is based on the measurments from 11th and 12th of January. So it does not take into account the last weeks heightened activity.

The current depth of the volcano is 130 meters. The cone is now mended with new material and has a lower incline of the slope, and should as such be more stable. This new stabillity should give Bob a good chance at growing if the eruption continues.

A lot of the ejected material has gone down slope, both from the earlier flank collaps, but also with a lot of new material. It has now filled up the canyon leading away from Bob. This should also increase the growth rate.

The total volume ejected via the volcanic flank eruption vent called Bob is now above the 0,145 cubic kilometre mark. Considering the amount of tephra suspended in the water, high volume of floating pumice stone (pyroclasts) we could now consider Bob to be rated at a VEI-3 on the explosivity scale. But remember that this has been achieved over more than a hundred days of activity. As a direct comparison we can compare with Eyjafjallajökulls eruption that lasted about 90 days and ejected a total lava volume of 1.4 ± 0.1 x 107 m3, comparing tephra volume is hard, but should be about the same really although the tephra here is suspended in the water. But judging from stain size it is a probable guess that we can assume roughly that Bob has ejected 1.4 x 108 m3 of tephra

Our little Bob is actually not that small. Just very slow and steady in his build up