El Hierro

[jand]

1108646 29/10/2011 15:04:48 27.8154 -18.0343 23  Sentido  3.6  4  NW FRONTERA.IHI

http://www.01.ign.es/ign/head/volcaSenalesAnterioresDia.do?nombreFichero=CHIE_2011-10-29&estacion=CHIE&Anio=2011&Mes=10&Dia=29

[jand]

This is strange on this site its saying the earthquake 3.6 was at 8km deep.

ML 3.6
Region CANARY ISLANDS, SPAIN REGION
Date time 2011-10-29 15:04:47.0 UTC
Location 28.04 N ; 17.93 W
Depth 8 km
Distances 165 km W San cristóbal de la laguna (pop 139,928 ; local time 16:04:47.5 2011-10-29)
68 km S Los llanos de aridane (pop 19,635 ; local time 16:04:47.5 2011-10-29)
50 km S Fuencaliente de la palma (pop 1,894 ; local time 16:04:47.5 2011-10-29)

But Ign are reporting it was 23km deep?

[fifi]

I noticed that about EL Hierros graph too Magoo. I think it may have been desensitised.

AVCAN have todays strongest earthquake listed as being 23.2 km so the same as IGN jand. http://www.avcan.org/?m=Animacion

I will try and catch up with what is going on later.



The latest photo of the pollution in the sea.

[jand]

Reply from Earthquake Report re the other site reporting the depth was 8km.

Armand Vervaeck says:
October 29, 2011 at 4:43 pm
We trust on IGN instruments because they have a lot of material installed on El Hierro. please trust IGN on the El Hierro data.

[Captain Sensible]

In www.islandconnections.eu :

Life is returning to normal on El Hierro with the decision to fully reopen the Los Roquillos tunnel and allow people in La Restinga to return home.


28.10.2011 - Schoolchildren at La Restinga's small village school are also being allowed back after several weeks of temporary classes in the town of El Pinar. The decisions were announced late last night by the Canarian government, which says the risk of subsidence and rockfalls is now very low as the seisimc activity off the island stabilises further.

[fifi]

http://www.emergenciaselhierro.org/ The official Cabildo of El Hierros statement. ( Translated  by Google)
The tunnel Roquille back to normal

    The school will rejoin the college of La Restinga

The  Roquille tunnel can immediately function normally again, as decided by the Committee Director of Civil Protection Plan for Volcanic Risk (PEVOLCA) met this afternoon at Valverde. The reason for this reopening has generated has been that the risk of seismicity that can cause landslides have dropped.

The Committee also agreed the Director of PEVOLCA back to La Restinga of the students who received their lessons in El Pinar and evacuees who were still bedridden.

Despite these measures, the Director General of Security and Emergency, Juan Manuel Santana, insisted that "all Civil Protection authorities remain pre-alert 24 hours" as it continues in La Restinga, in Tier 1 risk-free the population, "but we must remain vigilant." In this sense, Santana reported that the buses required for a possible evacuation will remain in La Restinga, the deployment of the Red Cross will continue stored in Valverde and Military Emergency Unit will remain in El Hierro.

The Director General of Security and Emergency recalled the recommendation of Public Health not to swim in areas affected by the spot and also informed that there will be a regular collection of water and fish samples for analysis by the Reserve Coordinator Marina de La Restinga.

As for the evolution of the eruptive process, the Scientific Committee noted that the deformation PEVOLCA is stable, which is another symptom of the eruption has ended.



Referring to the seismicity is occurring in the north of the island and is being produced at 20/25 miles deep, that Committee stated that it requires a thorough study "because the current data can not conclude anything" . Also emphasized that the constant presence of tremor difficult to locate earthquakes, necessitating the placement of a seismic array to characterize the seismic signals.

Finally note that the proposed integration of the Spanish Institute of Oceanography (IEO) in the Scientific Committee of PEVOLCA.

[jand]

La Restinga is now returning to some form of normality except for the fishermen and dive schools in the area and swimming is not allowed in the sea.

The issues now which are worrying are with the north west of the island near Frontera where the earthquake swarms have increased eartquakes are getting stronger and being felt on the island and pressure is rising rapidly which is also a major talking point at the moment.

[fifi]

28/10/2011 ... 13:59 - Ministry of Agriculture, Livestock, Fisheries and Waterhttp://www.gobcan.es/noticias/index.jsp?module=1&page=nota.htm&id=144260 (Translated by Google)

On the island of Hierro

The purpose of the meeting, to be held on November 3, is to analyze and assess the consequences of the volcanic eruption and its impact on the marine reserve

The General Secretariat of the Sea,;Ministry of Environment and Rural and Marine Affairs and the Ministry of Agriculture, Livestock, Fisheries and Water Canary Islands Government have called for the November 3rd meeting of the Monitoring Committee of the Marine Reserve Punta de la Restinga-Sea of Calm, on the island of El Hierro.

The purpose of the meeting, will be attended by the Spanish Institute of Oceanography, the Fishermen's Associations and diving, in addition to the authorities involved.It is to analyze and evaluate the consequences of volcanic activity.

The underwater volcanic eruption has affected water and money around the southern coast of the island of El Hierro. In this area, known as the Calm Sea, lies the Marine Reserve was created in 1996 at the request of the brotherhood of fishermen of La Restinga, to protect an area of great environmental value and high potential for fishing craft.

Until the eruption, the Reserve had achieved good results regarding the regeneration of interest in fishing resources and environmental protection funds and species of flora and fauna.


The General Secretariat of the Sea and the Ministry of Agriculture, Livestock, Fisheries and Water Canary Islands Government have been, since the first moment of the volcanic eruption, in constant contact, and with all the agencies involved are doing surveys and studies place, in particular with the Spanish Institute of Oceanography.

[fifi]

The news from La Provincia .es (Translated)http://www.laprovincia.es/especiales/2011/10/29/hierro-sufrio-ayer-sismos-mayor-grados/411829.html?utm_source=rss&utm_source=twitterfeed&utm_medium=twitter



 An earthquake of magnitude 3.6 on Richter scale was registered today in El Hierro by the National Geographic Institute (IGN), with its epicenter in the sea northwest of Border and 23 miles deep.

The tremor which was felt by the population, occurred at 15.04 hours and is the fifth in the last two days that exceed the magnitude 3.0, among the nearly one hundred registered between Friday and Saturday, mostly northwest of Frontier at a depth of between 16 and 26 kilometers.

The situation on the island volcanic alert remains at yellow lights, except for the part of La Restinga, the closest to the eruption underwater, where it is red light.

According to the Government of the Canary Islands, the spot in the sea caused the submarine eruption has reached the White Sands area, northwest of the Gulf, led by strong currents and wind.

The Directorate General of Public Health of the Canary Islands should not swim in areas affected by the volcanic eruption, "even for the scientists to finalize such a phenomenon."

The surveillance network IGN volcanic earthquakes located 63 Friday, two of whom felt by the population, the strongest of magnitude 3.3 on the Richter scale.

Unless a motion recorded west of the town of El Pinar, the rest of epicenters are located north of the island in the Gulf area, aligned NNW SSE from the sea, about 12 kilometers from the coast to the center of the island.

The tremor signal, submarine magma activity has continued at levels similar to previous days.

The deformation in the south of the island shows a referral to the east and a slight increase in a northerly direction, while the deformation in the north of the island is stable.

[fifi]

This may be of interest to anyone who enjoys looking at the graphs.


How to read seismograms.http://www.geo.mtu.edu/UPSeis/reading.html

http://www.geo.mtu.edu/UPSeis/locating.html

[jand]

Thanks Fifi for that info will be interesting to read think I have just managed to work out when the lines move up and down it means something has startled the machine !!!!.

[fifi]

[][][]

I understand the first link but havent tried the second yet. Too complicated for tonight I think.[]

[fifi]

AVCANS reaction to the reopening of the Roquille tunnel and the Governments latest report (Translated)

Current volcanic Canary Islands (AVCAN)
We are witnessing with astonishment  the reopening of the Roquille tunnel which lacks internal reinforcement structure, and the deployment of the Red Cross, while in the Gulf there are still some earthquakes, increasingly larger, which could affect the safety of the tunnel. We recall that  the Scientific Committee said that they did not know what could be happening: "do not know", GPS HI04 was out of use for the failure of the WiFi. Now, in the new note from the Government of the Canary Islands of today, said that distortion remains stable in the North of the island, but did not clarify if HI04 works correctly. Not answering the question of why there is  new Seismicity in the Gulf: if  it is resettlement or a possible new injection of magma. It is necessary to recall that, according to the Scientific Committee itself, such doubt was caused by the malfunctioning of the station HI04. Has it been repaired? Have they  replaced the WiFi of another station, HI01, for example? We do not know, but on the official website of IGN HI04 still provide data. What so far has been an adequate performance of scientists and authorities is becoming unfortunate. The population of El Hierro deserve a minimum of respect. AVCAN  request a response from the Government of the Canary Islands and the Scientific Committee  in line with the current situation.

[jand]

Fifi have you read anything about small harmonic tremours being picked up in the UK yesterday?

http://www.earthquakes.bgs.ac.uk/helicorder/heli.html

[jand]

This is one comment from someone living on El Hierro although there are many more that are feeling the same that have posted on Avcan.

Translated from Spanish.

So many days sleeping poorly by uncertainty. Not be able to rest that every home trembles. Live without knowing what will happen... begins to break many colleagues. It is the first time since the beginning the crisis I see many colleagues near the limit line. It is not the best situation to deal with the next few days if continues the trend of the last few hours. Institutions that are responsible for directing this crisis should study why this situation has been reached and put a solution. It is his duty.

[jand]

http://www.youtube.com/watch?v=RXBmh-qND_8

As far as I can make out this is the worry that the next eruption is going to be on this volcano and may cause a landslide .

[jand]

They have just had the strongest earthquake so far a 3.9 and it was felt on the island..

1108771 30/10/2011 07:46:35 27.7866 -18.0447 22  Sentido  3.9  4  NW FRONTERA.IHI

[fifi]

quote:Originally posted by jand

Fifi have you read anything about small harmonic tremours being picked up in the UK yesterday?

http://www.earthquakes.bgs.ac.uk/helicorder/heli.html

Hi jand, no I was just trying to catch up on what was happening in el Hierro and didnt read anything else.

             .....................

Important Update 30/10 – 07:53 UTC
- Based on all what follows Earthquake-Report.com predicts that PEVOLCA will meet very soon. Main reason : The increasing strength of the earthquakes.
- The strongest earthquake since October 8 (a M 4.4 quake at the time), now a Magnitude 3.9 quake, occurred at 07:46 this morning in the El Golfo bay.   Its epicenter was close to the Frontera coast line.  The 4.4 earthquake on October 8 was the start of a number of events like the beginning of harmonic tremor and the start of the green stain (eruption) soon after. The depth is still a secure 22 km. Some scientists are linking however the magma area below the El Golfo to the still continuing eruption to the south of La Restinga. These are however speculations who cannot be proofed.
- At earthquake-report.com we do not consider quakes up to Magnitude 5 as dangerous for houses, although indirect damage can be triggered by rockfall and landslides in mountainous areas like El Hierro.  Authorities will certainly follow up the El Hierro landscape scars when the quakes get again to Magnitudes 4 to 5. This will be a major concern for the El Hierro authorities from now on.
- Harmonic tremor remains the same as during recent days.  This may change fundamentally if the quakes continue and are getting more powerful.
- Since midnight UTC IGN listed 11 earthquakes and only 2 of them were lower then 2! The last 3 quakes had values of 3.2, 3.9 and 3.0.


              ....................

The stations on the other Islands are picking up the tremor.http://www.ign.es/ign/head/volcaSenalesAnterioresDia.do?nombreFichero=CFUE_2011-10-30&ver=s&estacion=CFUE&Anio=2011&Mes=10&Dia=30&tipo=1

[falkirkdan]

Well thankfully Fi the volcano did not erupt and trap us on Fuerty.

Or again maybe I should be saying sadly the volcano did not erupt and we were not trapped on Fuerty and had to return to cold Scotland[]

[fifi]

Welcome back Danny. It takes a while to get used to the cold weather again doesnt it?[]

[fifi]

A yellow alert has been given due to large waves.


Risk: Coastal Phenomena (swell 3 to 4 meters)

Start Time Phase Risk Situation
28/10/2011 12:00 preemergence coastal phenomena pre-alert


   http://www.emergenciaselhierro.org/

[jand]

New comments just posted

www.jonfr.com/volcano

[fifi]

The Government have issued a new press release.http://www.gobcan.es/noticias/index.jsp?module=1&page=nota.htm&id=144270




30/10/2011 ... 10:42 - Ministry of Economy, Finance and Security

He felt as Valverde and Frontera CECOES 1-1-2 calls

The National Geographic Institute has confirmed this morning the direction of the Civil Protection Plan for Volcanic Risk (PEVOLCA) an earthquake of 3.9 magnitude, northwest of Frontera, located in the sea to 22 miles deep. The quake, which was felt by the population, occurred at 7:46 pm and is the largest earthquake recorded in the island after the onset of the eruption south of La Restinga.

The 1-1-2 CECOES received calls from the towns of Isora, Guarazoca, Mocanal (Valverde) and Tigaday (Border)

The evolution of seismicity in the north of the island has increased in recent days and scientists who are monitoring constantly shuffled all possible scenarios, but still can not be defined with sufficient precision. In this sense incline between the main options that the process reduces or evolve into a rash located, most likely, at sea, with the features being developed to the south, whose parameters are stable.

Moreover, those responsible for the IGN confirm that during the day yesterday, October 29, 62 earthquakes were located, two of which were felt by the population. The earthquake of greatest magnitude reached a value of 3.6 on the Richter scale. This movement has been located at sea in the Gulf area about 4 miles from the coast at a depth of 23 km has been felt by the population with maximum intensity IV in the town of Valverde.

Most of the other registered events are located in the same area, aligned NNW SSE from the sea, about 12 kilometers from the coast to the center of the island. The depths vary between 15 km and 25 km.

In total, since the day July 17, 2011 10 615 events have been found.

Deformation
.According to reports from scientists at the University of Cadiz, and with reference to the deformation of the ground, continue two separate scenarios. The south of the island shows a remission in increasing deformation, clearly marked by the eruption process and that is evident in the data recorded in the GPS station of La Restinga.
In the north of the island, seen in the deformation component increased to a lesser extent North and the East.

Spot
Throughout the day have been observed clearly the main emission areas in which it has been seen fragments of lava. Also during the October 29 confirms that the stain has already spread to the entire Gulf area

[SurfJames]

My take on this is that the magma is once again making it's way to the surface, and this is causing the earthquakes. These are of low magnitude and unlikely to cause damage to houses or tsunami waves. It would appear that the activity now points to the north of the island, and we can expect an eruption there shortly. Rifts can open extremely quickly. This may then lead to a tectonic slip, and it may well be that lava is expelled on the island itself.

What is clear, is that these events present very little danger to the islanders. The icelanders live with far more dangerous volcanos and seem unworried by the events.

Keep up the posts Fifi and jand. Fascinating stuff.....have you thought about careers as investigative journalists?

[fifi]

Its exciting allright Surfjames. I love following every angle of a story like this because it shows the true picture (hopefully) of what is happening. Its a bit tricky sometimes because of the language barrier though. Hopefully soon you will find out if your theory is correct. I dont really know what to expect at all.[]

PS....the Government mentioned the main emission areas which I thought was interesting because normally they only mention one.

[jand]

el buque oceanográfico 'Ramón Margalef' ha detectado plumas térmicas en el Mar de Los Llanillos, que podrían estar ocasionadas por la emisión de gases. De confirmarse este extremo, podría estar produciéndose una nueva fractura volcánica, en este caso en el mar frente al Valle del Golfo.

The ocanographic ship, 'Ramon Margalef' had detected 'termic plumes' in the sea – In El golfo sea -, From a blog ( not confirmed)

Reply

[fifi]

[][][] You beat me to it jand.

[jand]

Data Update 30/10 – 11:55 UTC
- As expected in our update of 07:53, a meeting will be held this afternoon to evaluate the situation after the strong 3.9 magnitude earthquake. Will be present : scientists, authorities and the person in charge of safety and emergencies.
- The 3.9 earthquake from this morning 07:46 was followed by 1 M 3.0 and 8 M+2 earthquakes.

[jand]

Hi Fifi

I am looking on so many sites to get any more news updates  so hopefully I wont duplicate what you are posting.

The whole world is watching what is going on at the moment in El Hierro I have seen comments from Canada USA Germany Scandinavia Rumania Uk Spain just to name a few.

[fifi]

Tweets....

PrensaElHierro Cabildo de El Hierro
The helicopter GES has made new visual inspection during this morning.


There should be a video released later if there is something to show.[]

Tweeted question to the Cabildo

Rayco RaycoDorta Dorta
@
@ PrensaElHierro Is there a risk of volcanic eruption on Earth? Let's hope this nightmare ends soon and recuperates calm.

Their answer

PrensaElHierro Cabildo de El Hierro
@
@ RaycoDorta at the moment scientists do not rule out any scenario


15 minutes ago
....................


Keep up the good work jand.[]