El Hierro

[fifi]

Another hour with similar lines on the Tenerife graph. I wonder why the other stations are not picking it up? Lanzarote is turned off. I think those long lines may mean that it relates to something that has happened far away because there are no surface waves (or I could be completely wrong in my understanding of this page.... have a look jand)http://www.geo.mtu.edu/UPSeis/reading.html There have been quite a few big earthquakes around the world ....maybe India or Japan?

While I was trying to figure out where it may have been I noticed that there have been quite a few large earthquakes around Portugal, Morocco etc in the last week or so.... up to 4.7 on the Richter scale http://www.ign.es/ign/layout/sismo.do

[c matthews]

the webcams are down

[jand]

Fifi Happy New Year this graph from Tenerife is being discussed on the other sites have copied a few comments below dont think anyone knows what caused this.

wordpress.com copied.

This one is also nutty.
 Ok so I went and looked on the earthquake site and found out that there was a 6.8 quake at the Izu islands Japan,at a depth of 348km at 5.27 I am not sure if this quake has anything to do with the strange recordings.

Reply

GeoLurking says:

 January 1, 2012 at 09:21

Well... the traces get squirrelly in the 4:00 hour, the quake was in the 5:00 hour. Additionally, the Canaries fall into the shadow zone.

I don't think it was the quake.

Newby says:

 January 1, 2012 at 10:39

That really is strange Hattie, I just checked it here. http://www.ign.es/ign/head/volcaSenalesDiasAnterioresHora.do?nombreFichero=CCAN_2012-01-01_09-10&estacion=CCAN&Anio=2012&Mes=01&Dia=01&tipo=2&hora=09-10 Surely it must be a faulty recorder as it is too late for fireworks explosions.

Isn't Tenerife the island with Tiede on it? If so I hope it hasn't developed delusions of granduer after watching Bob struggling to survive. Is it possible instability could trigger a rumble or two from Tiede?

Reply

[jand]

Update 01/01 – 10:19 UTC
 -  The start of the year has not been missed by the volcano. A swarm of 7 earthquakes will probably give new strength to the eruption. The number of earthquakes is the biggest during a limited time frame since many weeks.
 - Harmonic tremor is still limited, which may be the cause of the many earthquakes
 - Telefonica and Movistar will have some days off – The server problem is not yet solved (all 4 webcams do not work). We remind our readers that Movistar / Telefonica is one of the most important telecommunications companies of the world !?! We really liked what they did so far, but this can be handled better.


 - The good old fixed U-stream webcam is the only one who also works on New Years day and he shows a lot of activity this morning. Big stain and a wide stirring area.
 - The epicenters of the many earthquakes are both in the El Golfo area close to the beach or below Tacaron, La Restinga and El Pinar. The strongest earthquake was a 2.5 magnitude with epicenter in the El Golfo area. We are anxious to hear what IGN has to say about this new development

[fifi]

Tenerife .... http://www.ign.es/ign/head/volcaSenalesAnterioresDia.do?nombreFichero=CCAN_2012-01-01&ver=s&estacion=CCAN&Anio=2012&Mes=01&Dia=01&tipo=1

[fifi]

Happy New Year Jand. I could get on to one of the webcams this morning c Matthews but the other two were down.

[jand]

From joke volta, ER.

Update 01/01 – 12:38 UTC
– Joke has just confirmed that the stain is very big and that a couple of circular brown stirring areas can well be seen from La Restinga
– Joke went already to the CAP science center this morning. The man on duty was a Greek volcanologist who was staring with his binoculars to the vent. He said that almost the entire area is brown. Although CAP is closed in the evening, employees from cap returned to the science center during the night to check whether all instruments worked well from 2011 into 2012 (fear of the post millennium bug ? : ) ). He also said that he has seen a few big smoking pyroclastos (lava stones) in between 07:00 and 08:30.

[jand]

Avcan FB Copied and Translated.

NACC this morning seems a natural signal by frequency and strength, but has something strange, is very dry and violent, so it is not the ground, it is rather a parasite, interference, but it is not electronic, it is caused by something in the vicinity of the sensor, as if had strong wind and something overhead violently near the seismography as a door that has been the bolt and begins hitting recondition for the wind... that or are making rounds of artillery in the Glens.... or not is that it may be, but does not have a pattern sismico and indeed stronger signals saturate the sensor and this falla (Enrique).
2 hours ago · Like · 10

EOSO in Gran Canaria is different... is not the same as the NACC since it does not coincide in time and it shows the telesismo of Japan 05: 47 and some electronic parasites... These are not foreign interference, i.e. electric problem..., anyway I leave that I have food new year... to pass happy day and of course happy 2012, lucky and happy year (Henry)
2 hours ago · Like · 15

[jand]

http://lance-modis.eosdis.nasa.gov/imagery/subsets/?subset=AERONET_Izana

[Paddster]

quote:

c matthews
Frequent Contributor



United Kingdom
68 Posts
 Posted - 01 January 2012 :  13:41:42
--------------------------------------------------------------------------------

the webcams are down

Damn................

[jand]

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

Video of the stain today,

[jand]

volcanocafe copied.

I think I can see a clear pattern in the CCAN tremor signal now. It is so regular, I cannot believe it is natural. It goes like this:

ca. 7 minutes high amplitude
 ca. 3 minutes low amplitude
 ca. 2 minutes high amplitude
 ca. 3 minutes low amplitude

Together a period of 15 minutes; it repeats itself every quarter of an hour at least for 8 hours now.

http://www.ign.es/ign/resources/volcanologia/CCAN/imagenes_sismica/DIA/CCAN_2012-01-01.jpg

[jand]

Carl le Strange says:

 January 1, 2012 at 21:49

I am actually starting to lean towards it not being the equipment.
 Why?
 It actually had a bit of warmup before going totally bananas, this is from 00 – 01 the night before. Same large slow transient wave lasting more than a minute. There are more of them if one starts to look for them. This rather lowers the probability of it being an instrumental fault since it is a known behaviour that just have increased a lot.
 http://www.ign.es/ign/head/volcaSenalesDiasAnterioresHora.do?nombreFichero=CCAN_2011-12-31_00-01&estacion=CCAN&Anio=2011&Mes=12&Dia=31&tipo=1&hora=00-01

Reply

Carl le Strange says:

 January 1, 2012 at 21:52

Also that it increases in amplitude and frequence over time is making it more likely to not be an instrumental error. But what it is, horked if I know, it could be anything at this stage, but it would need a bit of punch to show that clearly.
 http://www.ign.es/ign/head/volcaSenalesAnterioresDia.do?nombreFichero=CCAN_2012-01-01&ver=s&estacion=CCAN&Anio=2012&Mes=01&Dia=01&tipo=2#

Reply

[jand]

Food for thought interesting comments?

Volcanocafe Copied.


Hattie says:

 January 2, 2012 at 02:11

Hello, nothing to report so far tonight.

Reply

Hattie says:

 January 2, 2012 at 05:09

Tremor has dropped over the last hour. It looks to me like there might have been a small quake at 3.08, but nothing is showing up on the lists. Also CHIE is down again.
 http://www.01.ign.es/ign/head/volcaSenalesDiasAnterioresHora.do?nombreFichero=CHIE_2012-01-02_03-04&estacion=CHIE&Anio=2012&Mes=01&Dia=02&tipo=2&hora=03-04

Reply

Hattie says:

 January 2, 2012 at 05:57

Earthquake. 2nd 3.07 Lat 27.6521 Long 18.0380 depth 9.50 mag 1.40 SW El Pinar
 2nd 3.52 Lat 27.6307 Long 18.0286 depth 17.20 mag 1.10 SW El Pinar

Reply

GeoLurking says:

 January 2, 2012 at 06:16

Well... nothing, maybe. Then again, maybe not.

I've maintained for a while, though I haven't really emphasized it that much, that the tremor we see is not just from Bob.
A few weeks ago, someone posted an audio file that had converted the tremor graphs into an "audio representation." We could all hear a fascinating sound... based on Bobs tremor signal, but there was not a scientific method used in the generation of it, so you couldn't really throw it through something like CoolEdit and extract a running spectrogram that changed as the trace ran.

There was no way to reverse engineer the program's algorithm to see what it was.

There is however, a way to extract meaningful data from those spectrograms. If you take the image, and split into it's Hue, Saturation, and Lightness, you can get a single color (shades of gray) that represent the relative strength of that individual pixel. Using just the "Hue" component, I can then pipe it into Dplot and have the software extract a plot from it.

Once I do that, I have something that I can then used to pull the intensities of single frequencies vs time. My choice was 1 Hz, since that is about the middle of the road for these traces.

Comparing three stations, and the relative intensity of the 1 Hz signal across them, it's pretty obvious that there is more to the tremor than just Bob's indigestion.
Notice that EHIG's signal doesn't seem to care what Bob is doing. That means that there is another source of tremor, and in all likelihood, it's down in the pipe... deep. I say deep because both of the green and red trace stations are on the island, while EHIG is up on La Palma.

http://i40.tinypic.com/fmmgpe.png

Reply

GeoLurking says:

 January 2, 2012 at 06:18

BTW, "Level" is just the relative level of the Hue for those images.

Reply

[jand]

Diana Barnes Volcanocafe Copied.

I have suspected for some time that there is another source somewhere. That Bob is not alone. Maybe it is further North along the fissure or Henry Sea Mount.I agree that your plot does show a possible other source of tremor.

Reply

[jand]

Update 02/01 – 13:38 UTC
 - Joke made her daily morning walk and took a lot of beautiful pictures. The stain and the brownish center can well be distinguished on the images.  Click on one of the thumbnails to watch the entire series.
 - While making her walk she had a talk with the Cabildo / Telefonica maintenance webcam technician. When Joke asked him what was going on he was very surprised (means that he isn't looking at the images himself) and he said that his webcam was working perfectly. He then continued saying that "it must certainly a Madrid servidor issue". We are almost certain that in Madrid NOBODY knows what is going on.

[jand]

Fifi is this showing magma on the move now under La Palma?


Una Canaria says:

 January 2, 2012 at 17:18


volcanacafe copied.

La Palma is starting to worry me. See the seismogram.

http://www.ign.es/ign/head/volcaSenalesAnterioresDia.do?nombreFichero=EHIG_2012-01-02&ver=s&estacion=EHIG&Anio=2012&Mes=01&Dia=02&tipo=1

[fifi]

quote:Originally posted by jand


Fifi is this showing magma on the move now under La Palma?


Una Canaria says:

 January 2, 2012 at 17:18


volcanacafe copied.

La Palma is starting to worry me. See the seismogram.

http://www.ign.es/ign/head/volcaSenalesAnterioresDia.do?nombreFichero=EHIG_2012-01-02&ver=s&estacion=EHIG&Anio=2012&Mes=01&Dia=02&tipo=1

Im not sure jand. Those blobby bits could be from a helicopter. Have a look at this graph which shows what they look like when a helicopter lands. http://www.iris.edu/hq/programs/education_and_outreach/animations/17

[jand]

And now this ?

[fifi]

Strange allright jand. It doesnt seem to be linked to anything to do with El Hierro if you look at the two graphs between 4 & 5pm.
               LA PALMA




               ..............

              EL HIERRO

[jand]

New photo of the erruption taken yesterday  the pink colour is due to Iron.

[jand]

[jand]

[jand]

[jand]

[jand]

First earthquake today.

1119891

03/01/2012

05:24:52

27.6424

-18.0071

 16

2.0

4

SW EL PINAR.IHI

[jand]

Movistar Webcam back up working now lots of activity this morning with smoking plumes clearly visable.

[jand]

Sissel says:

 January 3, 2012 at 12:56

I wonder if the long ongoing tremor registered by CHIE (not the violent part of it) has to do with transport of hydrothermal fluids to Henry Seamount. The discharge of hydrothermal fluids there has been documented.

http://geology.geoscienceworld.org/content/39/9/855.abstract :
 "Seamounts can provide conduits for the entry and exit of hydrothermal fluids in ocean basins. However, only a few ridge flank hydrothermal systems that discharge through seamounts have been discovered, all located on relatively young crust. We have retrieved samples from 126 m.y. old Henry Seamount, an extinct volcano near the youngest Canary island of El Hierro, that provide evidence for Holocene low-temperature hydrothermal fluid discharge. This is the first documented finding of such activity at the Canary archipelago."

http://goldschmidt.info/2007/abstracts/A496.pdf :
 "How can Recent fluid venting at Henry Seamount be reconciled with its early Cretaceous age? We propose that hydrothermal circulation within the Jurassic oceanic crust around El Hierro is driven by a mechanism similar to that proposed for young crust of the Juan de Fuca ridge flank
 (Fisher et al., 2003), the ultimate heat source being the hotspot beneath the western Canary Islands."

[jand]

Carl le Strange says:

 January 3, 2012 at 13:03

I have a rather more simple explanation.
 We all know that Bob is just the last incarnation of an eruptive period that has been following a trend towards Henry Seamount. It is not a that far stretch of the imagination to believe that the first of those eruptions was the one furtherest out in a long fissure, and that the subsequent eruptions have happened closer and closer to the Island proper with Bob being among the closest, or the closest.
 Following that line of guesswork it would not be totally impossible that Henry Seamount or right next to it got the first dose of magma from the fissure as it opened up.

The reasoning behind the progression towards the island is that the fissure/tube would clog up close to the entrance as residual magma cooled off, and the other magma returns to the chamber as pressure disapears, so that behind the plug, there is an open conduit for the next eruption. I hope this was a bit understandable, I am still on my second cup of coffee.

[jand]

Video of smoking lava stones this morning.

http://www.youtube.com/watch?v=eJKDwbfg_Z8&feature=player_embedded