El Hierro

[fifi]

Thanks for the updates jand. I am off to the Islands in the morning but will try and keep up with what is happening by reading your posts.

[jand]

Yesterday evening there was a 4.4 and early this morning a 4.2.

Pevolca are meeting today at 12:00 although some have said this should have been sooner.


4.4 at 22:42 depth:19km
epicentre:
http://maps.google.co.uk/maps?f=q&source=s_q&hl=en&geocode=&q=%0927.6982+%09-18.1383&aq=&sll=53.800651,-4.064941&sspn=6.347559,21.489258&vpsrc=6&ie=UTF8&ll=27.69812,-18.138428&spn=0.074323,0.167885&t=h&z=13

http://www.ign.es/ign/head/volcaSenalesAnterioresDia.do?nombreFichero=CHIE_2012-07-03&ver=s&estacion=CHIE&Anio=2012&Mes=07&Dia=03&tipo=1#

02.29 27:6940 -18:1524 21 3.8 SW Frontera
02:31 27:6882 -18:1693 21 4.2 SW Frontera

[jand]

On Avcan facebook page there are so many comments by frightened people on the island after all what happened last night and this morning I have copied an example below.

El último gradísimo de las tres y media, creo, me ha sacado de la cocina, donde estaba tratando de dormir un poco y he sacado la colchoneta afuera, pero ha sido tan tremendo, que no puedo dormir y ahora estoy tomándome un chocolate y escribiendo estas lineas. Espero que no haya más así de grandes. He oído caer alguna piedra, pero nada importante. Buenas noches a todos.

The last three and a half gradisimo, I think I got the kitchen, where he was trying to sleep a little and I have taken the mattress outside, but has been so tremendous, that I can not sleep and am now taking me a chocolate and writing these lines. I hope there not more so large. I heard fall a stone, but nothing important. Good evening to all. (Translated by Bing)

Ánimos Nieves, mientras no se rompa el sello los sismos seguiran siendo así de intensos... Desde aquí EXIGIMOS al Pevolca que se deje de politiqueos y que tome de una puñetera vez todas las medidas de protección de la población herreña y, todas las políticas informativas... Que se dejen de desinformación politiqueada y de cuidar los intereses económicos por encima de la seguridad y de la tranquilidad de la población... Vergüenza... Vergúenza... Vergüenza...


Encouragement Nieves, while not break seal the earthquakes will continue being so intense... From here demand the Pevolca that stops politiqueos and to take all measures of protection of the population now and all informational policies once bloody... Let themselves be politiqueada misinformation and take care of the interests above the safety and peace of mind of the population... Shame... Shame... Shame... (Translated by Bing)

[jand]

Update 03/07 – 00:22 UTC
-The people who have subscribed to our El Hierro earthquake notifications (see below) must certainly have been surprised by the many M3+ earthquakes (we are subscribed too ). It gives an immediate feeling how much people in the area are suffering. A lot of these M3+ earthquakes are being felt  by the people (at least part of the people like in Sabinosa, Frontera, El Pinar, etc.) . Most of these earthquakes will not be marked as "sentido" because people are giving up to fill in the IGN forms, they rather discuss their emotional feelings at the Avcan FB.
If you are getting annoyed by the many emails (when you have set your level too low, please unsubscribe and resubscribe to a higher value)

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Update 02/07 – 23:57 UTC
- What a night ! All this El Hierro strong quakes and it isn't over yet – especially for the local population
+ a short-while ago : a strong earthquake to report near the Ica, Peru coast.

Important Update 02/07 – 23:16 UTC
- The people from El Hierro will have a bad night sleep mostly based on what to come next ?  The latest series of earthquakes are even stronger than earlier today. The latest one being a very strong M4.4 at 19 km depth here (please be aware that these are preliminary data who can be changed after manual intervention).
- We are arriving at Magnitudes were the international agencies like Geofon and USGS will capture the signal and report about it.
- Based on our experience with earthquakes and the type of earthquakes El Hierro is suffering, we do not think that damage will be inflicted (not even slight damage) at less than M5. The biggest danger for El Hierro are the possible landslides due to the strong shocks. We would not be surprised that Pevolca will take safety measures for people living near the Sabinosa cliffs if the strong earthquakes do continue for a while.
- It is a certainty now that this activity is far from over

Update 02/07 – 22:22 UTC
- One of the first "shallower" strong earthquakes so far. At 21:52 UTC a Magnitude 3.6 earthquake occurred at a depth of 11.6 21 km.  This depth was preliminary (soon reported after occurrence). Calculation of the earthquake parameters is very complicated and is mostly recalculated by scientists afterwards. In case of this earthquake, IGN personnel will soon work with the data. Epicenter here.

www.earthquake-report.com

[jand]

Update 03/07 – 09:03 UTC
Joke reports : A lot of people did not slept in El Pinar. Same for the villages in the El Golfo bay neither... I only slept for a few hours so now and then. At six I was on my way to the Tembargena-mountain-top (which has a view on the Lighthouse area), to take pictures.... I did not saw any stain.. It was a hard days night.
– Pevolca will (of course) meet later today to discuss the present situation of sometimes very strong earthquakes. Our expectation : some advise to calm the people and to tell them what to do in case of an earthquake (click here for our worldwide advise) + some limited additional measures to prevent the chance on injuries from landslides. The meeting will be held at noon (local time) http://earthquake-report.com/2011/09/25/el-hierro-canary-islands-spain-volcanic-risk-alert-increased-to-yellow/

Reply

www.earthquake-report.com

[jand]

14:05:31 27.7063 -18.1488 18 3.1 mbLg SW FRONTERA.IHI

• 
  14:02:22 27.6879 -18.1572 21 3.3 mbLg SW FRONTERA.IHI
• 
  13:58:53 27.6981 -18.1723 21 Sentido 3.2 mbLg SW FRONTERA.IHI
• 
  13:49:00 27.6919 -18.1602 21 2.7 mbLg SW FRONTERA.IHI
• 
  13:47:53 27.6923 -18.1533 20 Sentido 3.8 mbLg SW FRONTERA.IHI
• 
  13:47:14 27.7126 -18.1574 19 3.0 mbLg SW FRONTERA.IHI
• 
  
  1153953 03/07/2012 14:02:22 27.6879 -18.1572 21 3.3 mbLg SW FRONTERA.IHI
• 
  1153951 03/07/2012 13:58:53 27.6981 -18.1723 21 3.2 mbLg SW FRONTERA.IHI
• 
  1153925 03/07/2012 13:47:53 27.6923 -18.1533 20 3.8 mbLg SW FRONTERA.IHI
• 
  1153952 03/07/2012 13:47:14 27.7126 -18.1574 19 3.0 mbLg SW FRONTERA.IHI
• 
  1153950 03/07/2012 13:42:56 27.6967 -18.1554 20 2.6 mbLg SW FRONTERA.IHI
• 
  1153947 03/07/2012 13:42:12 27.7119 -18.1504 19 2.6 mbLg SW FRONTERA.IHI
• 
  1153923 03/07/2012 13:39:35 27.6900 -18.1499 20 2.8 mbLg SW FRONTERA.IHI
  
  ign.es

[jand]

Update 03/07 – 14:50 UTC
- Strong activity started again at 13:40 UTC (14:40 local time) with a couple of serious jolts. The first one was measured at M3.8, the stronger activity is still going on while writing this update
- The PEVOLCA meeting has ended and as expected did not decide too many things. The meeting was also attended by the subscretary of the Spanish Interior Minister. All equipment will be made ready in case El Hierro do need it.  The participation of the National entities of the Army and the Guardia Civil (ie for eventual bathymetries) has been guaranteed. A lot of different specialty departments have also attended the meeting (too much to summarize).
The meeting got a detailed analysis of the present situation where was stated that the seismicity and the deformations had a tendency to decrease .... (translated by ER). The prompt answer of the volcano : a M3.8 jolt shortly after the meeting (but they surely haven't felt it as the meeting was held in Tenerife)
Comment ER : we think the decisions are logical as we have written this morning. This Pevolca overview has been elaborated based on the reports in the local press and the press report.

www.earthquake-report.com

[jand]

The latest statement by the Goverment of the Canarias.

Translated.

The vibration felt by the population of El Hierro last night due to a succession of earthquakes

03-07-2012... 14: 52 – Ministry of economy, finance and security

The yellow traffic light of information to the public is kept in the same area

The Working Group of the Scientific Committee has been reported after his meeting this morning, the vibration felt by the population during the last night due to the succession of chained earthquakes.

It has also confirmed that the center of pressure of the magmatic process follows 20 kilometers deep South of El Julan, in the Mar de las Calmas.

The Working Group, which involved scientists from the IGN, CSIC and the University of La Laguna, has concluded are expected higher magnitude earthquakes in the next week.

This situation does not change in the light of information to the population, which is in yellow for the zone outlined last week, but yes insists on recalling the measures of self-protection in case of earthquakes. In this sense the Cabildo de El Hierro has resumed its formative and informative task as it evolved in the upstream of the eruptive phenomenon of last year.

Also on the island is already shifted position of advanced remote control (WFP), technical and personal group of emergency and rescue of the Directorate General of security emergency, to assist in strengthening operational coordination and communications tasks.

As already reported this morning, the seismic activity associated with the active magmatic process affecting the island of El Hierro has intensified and shows a lower growth rate in the deformation. In this sense, the National Geographic Institute reported to the direction of the Plan of Civil protection by volcanic risk (PEVOLCA) on the location of the seismicity during the last 24 hours, has focused on an area less scattered than the previous days, mainly on the coastal area of Orchilla, West of El Julan and the Mar de Las Calmas.

From 21: 40 pm yesterday on 2 July, 03: 00 h of today July 3, the seismicity has accelerated registering a strong episode of remarkable magnitude earthquakes, widely felt by the population. So far, have been located over 1,505 earthquakes, 234 of which are of magnitude greater than 2.7 degrees on the Richter scale. The maximum of this series, 4.4, magnitude has been in yesterday, July 2, at 22: 42 hours, with its epicentre in the sea off the coast of Orchilla, 19 kilometers of depth and a maximum current of IV EMS. The depth of these earthquakes continues to hold around 20 km (between 17 and 21 km). No superficial earthquake has not been registered in the last hours.

On the released seismic energy, IGN noted that in the last 24 hours he has experienced a strong increase, reaching a total aggregate value of 1.4×10 Joules (12). Instead, stations of the GPS network, and up to 24 hours of yesterday, continue to show a lower speed of growth in the horizontal components and stabilization or slight change of trend in the majority of the vertical, marking an apparent Center of pressure in the Mar de las Calmas. The total cumulative displacement from the June 24 and up to 24 hours yesterday, is about 7 centimeters in the horizontal components and the vertical, a maximum of 9 centimetres deformation

Finally, stresses the report by IGN, temperature values, CO2, radon in the galleries in the North of the island, where are located the geochemical continuously recording stations, are normal and not shown any significant change since the beginning of the activity.

It is useful to recall the measures of self-protection in case of earthquake:

If you are in the interior of a building it is important:
** Do not leave the building until the end of the movement.
** Seek refuge under strong structures.
** Keep away from Windows, glass Windows, showcases, walls and objects that may fall out and hit you.
** Not to be in the kitchen.
** Do not use the elevator.
** If the movement is strong, once completed, turn off the supply of electricity, water and gas.

In a public building (supermarket, cinema, library, etc):
** Do not run terrified towards the exit.
** Move away from Windows or glass doors.
** Protect under strong structures.
** In spaces with shelves (libraries, archives, supermarkets, etc.) out of the corridors where the shelves and stooping, kneeling, j lard to the sides of the shelves.
** The school made that children and students kneel under his desk, putting a book on your head

If the blast surprised abroad
** Keep calm and others to save it. Try to control any situation of panic.
** Go to an open area, away from the damaged buildings.
** If any damaged buildings, do not enter them
** If it is flowing in the car slowly stop the vehicle, procures you do not block the road. Turn on the radio to know authorities the situation and recommendations in particular by road blockages.
** The authorities indicate protective measures to take through the media, information centres and centres of affiliation and registr

[jand]

The graph of energy is still rising.

http://www.avcan.org/sismica/graficas/G1162.jpg?t=1341334182

[jand]

Thanks for the updates jand. I am off to the Islands in the morning but will try and keep up with what is happening by reading your posts.

Hi Fifi

If you are going holiday have a great time.

The quakes are getting stronger some islanders chose to sleep outside las night because they were too scared to sleep indoors because of all themovements.

Its just a watching and waiting game please take care.

[jand]

Update 03/07 – 15:41 UTC – very interesting Press Conference
IGN expects new strong earthquakes (up to M4.5-M4.6)  for the next 7 days. This has been said at a press conference today. Pevolca does not have the intention the meet soon again if only these earthquakes are continuing as this is expected from now on. Pevolca asks the population of El Hierro to be ready for whatever eventual urgent communication which Pevolca may decide. The Grupo de Emergencias y Salvamento (GES) will be at El Hierro to reinforce the local groups, this to be prepared for whatever crisis to come.
María José Blanco (IGN) has said that an eventual eruption at the present seismic center (Las Calmas sea south of the lighthouse), where depths of the hypocenters are still measured at 20 km, can be excluded at this moment.  She said that it also lasted quite some time last time before an eruption took place. The epicenters of the earthquakes had to migrate more than 20 km to the south before the magma found his way up.  María José Blanco also said that an eruption on land can be excluded at the moment but that IGN follows up the situation very consciously as all the events are going much quicker than during last years eruption.  (compiled by ER from a number of local press reports like Diario El

www.earthquake-report.com

[jand]

Very important Update 03/07 – 23:55 UTC
A report from the GSC (Communication department of Canary Islands) has revealed that a helicopter survey unit has noticed a (small) jacuzzi and a white stain at coordinates 27º 4.573" N y 18º03.761" W in the Las Calmas sea approx. 180 meter out of the coast. The images which have been taken by the helicopter will now be analyzed by the IGN scientists. A new flight above the zone is planned for tomorrow.

- Nobody is sure at this moment whether this picture really reveals a new vent or shows just some currents. The similarity is at least what we used to see as colors and as water agitation during the 2011 eruption.

Jon Frimann (Icelandic volcanoes blog) writes an interesting comment which we share : Dike intrusions can happen with and without harmonic tremor. Dike intrusions with harmonic tremor happens mostly at places where conduct is well established. That is not the case now. So I would not trust any signs for harmonic tremors just yet. Harmonic tremor pulse might be seen few hours before the eruption starts. Given my experience and what I did see during Eyjafjallajökull volcano eruption in the year 2010. Given the amount of earthquake activity. I am assuming that some of the magma has reached less depth in the crust without making many earthquakes at present time. The reason for that is magma has easier time to make the rock soft at less depth. Soft rock means few to no earthquakes. How this plays out is all big question that currently nobody has an answer to at the moment. (Thanks to Ian Carson for informing us)

www.earthquake-report.com

http://i50.tinypic.com/4h5wm0.png

[jand]

FCO Advise  .

There has been an increase in seismic activity on the island of El Hierro, Canary Islands. The risk level for the towns of El Julan and La Dehesa has been raised to amber as a precautionary measure, the rest of the island remains at green. Check the Canary Government website for updates on the situation . See Natural Disasters - volcanoes

[jand]

Update 04/07 – 14:27 UTC
- The local (wise) fisherman have been proved right so far.
Not official yet but Islanders are writing : "El PEVOLCA confirma que no se observan parámetros anómalos en la zona sobrevolada por el helicóptero del GES.  Científicos del INVOLCAN, que portaban una cámara térmica, y del Instituto Geográfico Nacional no han observado parámetros anómalos en el vuelo de reconocimiento que han realizado esta mañana en el helicóptero del GES, en la zona en la que ayer se atisbó una mancha blanca en el mar y burbujeo.  Con este vuelo queda definitivamente confirmado que no se han producido cambios significativos en el proceso magmático activo en la isla de El Hierro, aunque se mantiene el análisis de datos de forma continua."
PEVOLCA confirmed that no abnormal parameters were observed in the area flown by the GES helicopter. INVOLCAN scientists, carrying a thermal camera, and IGN personnel have not observed abnormal parameters during this morning's recognition flight. The flight has confirmed that there were no significant changes in the active magmatic process on the island of El Hierro. (ER translation)

Update 04/07 – 11:58 UTC
- Joke reports that a GES Helicopter with divers on board has left Frontera a short-while ago. IGN and Pevolca are taking no risk this time and do all they can to clarify the situation.
- Also the IGN GPS stations are showing all a strong vertical uplift today.
- Earthquake epicenters are still concentrated to the south of the lighthouse area, no change in depths.

Update 04/07 – 09:37 UTC
- Joke will try to take a few some zoom pictures from the so called detected emission spot at noon.
- In the meantime, villagers are discussing the new emission location and what they can see on the pictures. Joke reports by SMS that the local fisherman do not believe in a new emission spot but are calling it a natural phenomena, ocean floor sea (sorry if this word does not exist in English as we have no other way to describe it).  The phenomena is when the current are stirred over the ocean floor and are generating white foam waves at the surface.


Deformation data courtesy Involcan / Univ. Nagoya, Japan

Update 04/07 – 07:18 UTC
- After comparing new "ultra rapid" deformation data from the University of Nagoya (Japan) we can conclude that horizontal (East) and vertical deformation is increasing again at SABI, REST and FRONT, in fact all GPS stations except PINA monitored by Dr. Takeshi Sagiya. The increase is strongest in the vertical deformation.

Update 04/07 – 06:39 UTC
- Everybody will be curious today whether the new "gas emission" spot will pass the IGN scientists testing or not.
- Even when the GES detection is being confirmed, this is far from being a new eruption. If magma would have been flowing on the present location, big steam clouds would have been seen as the depth is no more than 10 to 50 meters.  We haven't succeeded in finding the actual depth of this location. Google Earth, who is quite accurate in giving Ocean depths, shows a disappointing "o" .
- Was the erroneous location data given by the Gobierno in their press report deliberately wrong or just a simple human error?. In 2012 these kind of tricks are no longer holding. Never underestimate a couple of hundred dedicated people who will start searching for secrets with todays internet tools. Congratulations to some Avcan detectives who apparently found the spot even earlier than we (what a disappointment to see that )
- Hypocenter depths of the earthquakes remains at 17 to 21 km
- 169 earthquakes have been counted (or rather listed) by IGN yesterday
- we have counted 45 "terremotos" so far today
- a very calm seismogram today (and partly yesterday) – 1 week ago we would have called the current seismicity "spectacular"

www.earthquake-report.com

[jand]

The energy graph is again still rising .

http://www.avcan.org/sismica/graficas/G1171.jpg?t=1341397376

[jand]

The new update by pevolca is saying that both La Palma and Tenerife are showing signs of deformation.

New report by Pevolca is saying that both Tenerife and La Palma are showing deformation ??

,,New informative part of the PEVOLCA on the page of the Government of Inseln (Henry) in the last 24 hours reduce the earthquakes and is ESTABILIZA the speed of the DEFORMATION in EL HIERRO. 04-07-2012... 16:28 – Ministry of economy, finance and security until the time have located more than 1,650 earthquakes, 263 of which are of magnitude greater than 2.7 in the last 24 hours has decreased the seismicity in the island of El Hierro as it emerges from the report that the National Geographic Institute has moved to the direction of the Civil Protection Plan by volcanic risk (PEVOLCA). The zone of seismicity continues paging over a large area near the lighthouse of Orchilla, mainly at sea, to the West of El Julan and the Mar de Las Calmas. From 3: 00 pm yesterday, July 3, the seismicity has decreased, both in number of registered at magnitude events, showing a comparable to the registered activity prior to the strong intensification of day 2 and 3 morning. So far have been located more than 1,650 earthquakes, 263 of which are of magnitude greater than 2.7 mbLg. The maximum of this series of 4.4 magnitude mbLg, registers 22: 42 on July 2, with its epicentre in the sea near the coast, South of Orchilla, 19 kilometers of depth and a maximum current of IV EMS. The depth of the earthquakes located remains around 20 km (between 17 and 21 km) and there has been surface earthquake one. The released seismic energy reaches a total aggregate value of 1.5×10 (12) joules. Deformation up to 24 hours of yesterday, July 3, the GPS network, which measures the surface deformation on the island, still shows a growth rate similar to the last days (which is less than the initial days), both in the horizontal and vertical components, marking an apparent Center of pressure in the Mar de las Calmas. The total cumulative displacement between June 24 and 24 hours yesterday, is about 8 centimeters in the horizontal components. The vertical component registers a maximum of about 10 centimeters deformation. The deformations of the analyzed last 24 hours show a slight positive northward in the horizontal components and upward trend in the vertical component, in all seasons, both in El Hierro and control stations of IZAN (Tenerife) and LPAL (La Palma), by what not so we can associate only with a local movement caused by abnormal process of El Hierro,,

[link to www.gobcan.es]

[jand]

SPECIAL NOTE AVCAN 026 – 04/07/2012 – 21:00 Peninsula. – EVOLUTION AND MONITORING EARTHQUAKE SWARM-VOLCANIC ISLAND IN THE IRON. In the seismicity map update today, and yesterday took 86 169 earthquakes located by IGN, and other highly concentrated seismic swarm in the Lighthouse Orchilla like a ball, with the earthquakes of scattered efforts around is seen as the last-ball This indicates that the intrusion of magma pressurization progresses and also (of course all go back up GPS), for the time and efforts continue to break Note that the system of NNW-SSW faults is the most resented by aligning the earthquakes in that direction. This makes it more seismicity expected throughout the day with a maximum located between 01:00 and 04:00 h UTC this morning, although there may be some isolated strong earthquake before .. (Enrique) Emphasize what is said in the previous note, I have to emphasize that the next 48-72h hours are very attentive to all notices and official communications, as well as the notes or parts that can be issued PEVOLCA which alone are worth and we all must heed, and they are the only official source authorized to give information to the public. is important not to adhere to recommendations, information or comments from social networks (including this one), or independent forums or officially unauthorized by PEVOLCA or rumors can move around, stay calm at all times and be alert. (Enrique)

http://www.facebook.com/pages/Actualidad-Volc%C3%A1nica-de-Canarias-AVCAN/163883668446

[jand]

Remember the post in 2 working hypothesis) that explain the note above is not nor more nor less than the application of the predictive method of eruptions which uses the inverse of the released seismic energy accumulated as a predictive method of eruptions that we are testing and which sometimes gives results... and the truth is that in the areas where energy seismic with a pattern determined more or less constant time is released and continues this pattern up cut the the coordinate axis (where the energy would be infinite) tells you the time in which it is expected a large release of energy, a rash or a stronger earthquake.In the case that concerns us, if we take from 00: 00 h on day 02 at 06: 00 pm of the same day, we get a straight line than to extend it and cut the zero, we would give a time that would be the morning of 05 July at 20 h UTC... more or less... with an error of 1.5horas... or between 01: 00 and 04: 00 h, to see whether it meets... the truth is that it would be the range of the next rally, we'll see what happens, already all of these are working hypothesis, very serious indeed and that according to the literature already have been used by r. Ortiz successfully in the Tungurahua volcano to predict more explosive phases. Because that tonight we will see and we prove this hypothesis... (Henry)
http://www.avcan.org/sismica/graficas/G1179.jpg?t=1341399528

[jand]

I repeat this answer also, proof that this already worked before, because already posts, why I tell you this, is that we have two cases that have been met, the first is met, if we take the slope area between June 29 between 01: 00 and 13: 00 h and we prolong, we're going to 02: 30 h on 03 day where there was a 3.8 and 4.2... almost nothing.On the same graph, if we take the slope from 22: 00 h on June 29 to 08: 00 h on July 30 day leaves us on the 11: 00 pm on the night of day 02, where there was a 4.4 and many more.So this method which is not to take a joke.(Henry).http://www.avcan.org/sismica/graficas/GPruebaEnergiaAcumulada.jpg?t=1341401444

[jand]

This is a statement from the American USGS Site.

HIERRO Canary Islands (Spain) 27.73°N, 18.03°W; summit elev. 1500 m

On the night of 24 June, a M 3.1 earthquake occurred offshore N of El Hierro island at a depth of 20 km. After that event, both the seismic activity and the deformation greatly increased. The seismicity, initially located N of the island in the El Golfo area, migrated S, then later to the W, along the E-W rift zone. On 27 June, the Plan de Protección Civil por Riesgo Volcánico (PEVOLCA) raised the Alert Level to Yellow (on a three-color, traffic-light scale) for areas near El Julan (along the SW coast) and La Dehesa; The Alert Level remained at Green for the rest of the island.

On 28 June, seismicity migrated to the SW in Las Calmas Sea and remained SW of the island, mainly offshore, until 3 July. The depth of the events was concentrated around 20 km. Since 24 June, more than 1,500 events have been located, and more than 250 of those events were M 2.7 and higher and often felt by residents. The biggest event was a M 4.4 that occurred on 2 July at 2242, located offshore SW the island, at 19 km depth. High deformation rates were measured by every GPS station on the island, reaching 8 cm in the horizontal component and about 10 cm of vertical displacement.

Geologic Summary. The triangular island of Hierro is the SW-most and least studied of the Canary Islands. The massive Hierro shield volcano is truncated by a large NW-facing escarpment formed as a result of gravitational collapse of El Golfo volcano about 130,000 years ago. The steep-sided 1500-m-high scarp towers above a low lava platform bordering 12-km-wide El Golfo Bay, and three other large submarine landslide deposits occur to the SW and SE. Three prominent rifts oriented NW, NE, and south at 120 degree angles form prominent topographic ridges. The subaerial portion of the volcano consists of flat-lying Quaternary basaltic and trachybasaltic lava flows and tuffs capped by numerous young cinder cones and lava flows. Holocene cones and flows are found both on the outer flanks and in the El Golfo depression. Hierro contains the greatest concentration of young vents in the Canary Islands. Uncertainty surrounds the report of an historical eruption in 1793.



http://www.volcano.si.edu/reports/usgs/

[jand]

It has been noted on other sites that the earthquakes seem to be changing direction now to a North West direction as per the graph from IGN  shown on the link below.

http://www.01.ign.es/ign/resources/volcanologia/jpg/Eventos_HIERRO_2D.jpg

[jand]

IGN have reported that La Palma and Tenerife are moving horizontally.

Update 06/07 – 14:28 UTC
– A new Pevolca reports confirms what we have written earlier today and yesterday. Additionally IGN has reported that also the islands of Tenerife and La Palma are moving horizontally. The El Hierro activity cannot be the only reason for this horizontal deformation. IGN also sampled air and water in the earthquake epicenter area and has found no abnormal values.,,

http://earthquake-report.com/2011/09/25/el-hierro-canary-islands-spain-volcanic-risk-alert-increased-to-yellow/

[jand]

Fifi this video has been made by Mary Greeley I seem to remember last year I think you posted something else from her.

If nothing else the maps and graphs are interesting.

http://www.youtube.com/watch?feature=player_embedded&v=MMcB_uY-xp4#!

[jand]

The latest goverment statement.

Seismic activity in the iron maintains a low level and gives a lower growth in the deformation.

07-07-2012... 10: 59 – Ministry of economy, finance and security

** In the vertical component continues to have a maximum value of 10 centimeters of deformation

The seismicity corresponding to the active magmatic process in El Hierro maintains a low level of activity and lower growth occurs in the deformation. These are the main conclusions transferred by the Instituto Geográfico Nacional (IGN) to the direction of the Civil Protection Plan by volcanic risk (PEVOLCA).

Earthquakes continue localizing in the environment of Orchilla, mainly at sea, both to the South and to the West, to a depth around 20 kilometres without producing migration to the surface. The released seismic energy reaches a total accumulated value of 1. 57x1012julios.

Up to 24 hours of yesterday, July 6, the GPS network shows a stability of deformations both in the vertical and horizontal components. Distortions show an apparent Center of pressure in the Mar de las Calmas, which for a few days, gradually moves towards the Southwest. It should be noted that the total cumulative displacement between June 24 and 24 yesterday, is still about 8 centimeters in the horizontal components and about 10 centimeters in maximum deformation in the vertical component.

On the other hand, add the deformations of the 3rd and 5th of July show anomalous behaviour in all stations of the island, as well as control stations of IZAN (Tenerife) and LPAL (La Palma). That is why that IGN does not associate them only with a local movement caused by abnormal process of El Hierro. In a relative way, distances between the stations of El Hierro and LPAL as reference station, confirm the pattern of stability.,,

http://www.gobiernodecanarias.org/noticias/index.jsp





http://www.gobiernodecanarias.org/noticias/index.jsp?module=1&page=nota.htm&id=149828

[jand]

There has been an earthquake this morning at only 10km deep.


Region CANARY ISLANDS, SPAIN REGION
Date time 2012-07-07 11:02:31.1 UTC
Location 27.85 N ; 18.19 W
Depth 10 km

[jand]

There has been another LP earthquake between 16:00 and 17:00.

http://www.02.ign.es/ign/resources/volcanologia/CHIE/imagenes_sismica/HORA/CHIE_2012-07-07_16-17.jpg

[jand]

You can see the energy on this IGN graph.

http://www.02.ign.es/ign/head/volcaSenalesDiasAnterioresHora.do?nombreFichero=CHIE_2012-07-07_16-17&estacion=CHIE&Anio=2012&Mes=07&Dia=07&tipo=2&hora=16-17

[jand]

Another phase of activity has started late this afternoon .

http://www.01.ign.es/ign/resources/volcanologia/CHIE/imagenes_sismica/HORA/CHIE_2012-07-07_18-19.jpg

[jand]

http://www.01.ign.es/ign/head/volcaSenalesAnterioresDia.do?nombreFichero=CHIE_2012-07-07&estacion=CHIE&Anio=2012&Mes=07&Dia=07

[jand]

Strong movements are being felt on the island now.

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