El Hierro

[jand]

There are lots of comments on Avcan FB at the moment regarding the situation and a lot more unease about whats happening.



Ojito to that last quake at 8 km, as he says crazy. Also look in the area where there has been, in land and North of the island, nothing to do with the eruptive zone of the South. 8 km are nothing (in terms of megaescala) If an earthquake produced by magma ascending. Any crack in the ground or weakness that area before they can begin to escape gas first and who knows after... (Translated by Bing)

about an hour ago · Like.







Julius Sebastian Tampoco quiero ser alarmista, pero me pregunto, ¿a que profundidad tienen que darse los terremotos en el norte o cualquier lugar de la isla para que el semaforo se ponga en rojo en toda la isla y no solo en la zona marina del sur?

I do not want to be alarmist, but I wonder, does that depth needed to give the earthquakes in the North or anywhere on the island so that the traffic light will put in red on the entire island and not only in the marina South area? (Translated by

[jand]

ý1124837 03/02/2012 14:35:52 27.6913 -18.0306 13 2.4 mbLg SW EL PINAR.IHI

[jand]

OT but another volcano waking up.

Gina N says:

 February 3, 2012 at 18:15

Panorama of Halema#699;uma#699;u is showing a interesting pattern of fuming from the caldera floor
 http://volcanoes.usgs.gov/hvo/cams/KIcam/

Reply

[jand]

Al comparar la altura de la masa oscura del cono de la abertura tercero en las fechas del 01 y 03 febrero de 2012, se desprende que un colapso pequeño, de 15 a 20 metros, la parte superior se ha producido, ya sea en la mañana del 02 de febrero, ya sea la noche de 2 a 3 feb ...

To compare the height of the dark mass of the cone of the opening third in 01 and 03 February 2012 dates, it is clear that small collapse, 15 to 20 meters, the upper part has occurred, either on the morning of February 02, either the night of 2 to 3 feb... (Translated by Bing)


eso es una cojetura basandose en la mancha¿no? porque no hay mas datos ¿o me he perdido algo?


This is a cojetura based on the English channel? because there is no more data or I lost something? (Translated by Bing)

8 minutes ago · Like.







Raymond Matabosch Carmen Tirado Saura, este es un hallazgo mirando a la zona de erupción. La forma del cono puede ser vista desde la costa y El Julan
4 minutes ago · Like

Carmen Tirado Saura, this is a finding looking rash area. The shape of the cone can be seen from the coast and El Julan

[jand]

GeoLurking says:

 February 3, 2012 at 19:20


Quake plot... rotating 3D with Moho, Ocean Crust, Jurassic Sediment, and surface layers.

1 Jan to 3 Feb 2012 quakes.

http://youtu.be/4US-B_O9RUE

[jand]

The earthquakes are increasing in intensity the eathquake this morning at 0440 was a 3.4.
RenatoRio says:

 February 4, 2012 at 05:21


Two more quakes. And a 3.4. This one should be felt...
 1124878 04/02/2012 04:43:00 27.6547 -18.0328 14 1.6 mbLg SW EL PINAR.IHI

1124870 04/02/2012 04:40:28 27.6508 -18.0230 16 3.4 mbLg SW EL PINAR.IHI

[jand]

RenatoRio says:

 February 4, 2012 at 03:39


Meanwhile CHIE has jumped high and has produced big explosions and earthquakes.
 Wow!
 https://fbcdn-sphotos-a.akamaihd.net/hphotos-ak-snc7/s320x320/405439_294318223963566_100001561712665_890391_478847871_n.jpg

Reply

[jand]

Denise says:

 February 3, 2012 at 23:58


AND, guess what? More food for thought! [drum roll here] While I was translating the above post, Barrera (finally!) came out with a new one. So, a bit more hastily translated (and feeling sheepish about my lack of geological vocabulary), here it is:

What is going on with the volcano? Posted Feb. 3 by José Luis Barrera Morate

"Since the 19th of January 2012, the volcano has been behaving in a spasmodic manner, with large intervals (sometimes 10 hours or more) without volcanic activity, in opposition to other periods of great effusive amplitude. The eruption has taken a break, although the gases rise to the surface continuously, often dragging the large blocks of black lava as usual. Is what comes up the original material, or is it dragged by the gases from the walls of the crater? This is not known, but it appears probably that the petrologic composition is the same: BASANITES ("limburgite in the old definition; the term was introduced by the German mineralogist Rosenbusch, in 1872, and derived from the region of Limburg, Germany, where it was prevelent.) Today, the word limburgite has fallen into disuse. For the neophytes, upon viewing it a basanite has an appearance similar to basalt but with fewer visible crystals (nearly all of them are olivine) and an absence of feldspar (in this case plagioclase).

This basanitic composition has been dominant in the most recent volcanism of El Hierro, so it is consistent with what one would expect magmatically. The field of volcanoes of La Restinga and its upper slopes are basanites and must represent a "petrologic province" together with part of the submarine ridge of La Restinga.

Where does the volcano draw the strength from to emit the volcanic materials that are seen on the water with such frequency? Given the volcanic tremor amplitudes it doesn't appear normal that there would be sufficient force to emit the material, if the crater is, as they say, is at 130 meters depth!!!

For 3 days the tremor amplitude has increased but without reaching a high range, rather it is staying low-medium. It is remaining constant in this activity and some times there are large emissions and no tremor increases appear. Perhaps nothing is coming back, this being the magma that was partially crystallized after so many days of emission, thereby reducing its fluidity.
 In the accompanying photo, you can see under the microscope a basanitic composition. The large yellowish crystal on top is olivine which is found in a very finely grained cryptocrystalline matrix with abundant crystals of olivine and clinopyroxene, the principal and major components the rock. If the rock becomes more crystalline, fluidity decreases and the emission of lava will slow. In order to interpret the current behavior of the volcano we must wait for the next petrographic and geochemical analyses that, according to what has been announced, will be soon.

Finally, the appearance of a mini-earthquake crisis since January 23rd must be noted, with several earthquakes having magnitudes exceeding 2.0 on the Richter scale. The epicenters are scattered throughout the areas affected by the seismic activity of the past weeks and months, thereby confirming that the volcanic crisis remains in the same locations as where it began."

http://blogs.elcorreogallego.es/elhierro/2012/02/03/%C2%BFque-le-pasa-al-volcan/

Reply

[jand]

There have been 5 earthquakes already since midnight.

It looks like we now have a 5th earthquake for Feb. 4th, a 1.3.
 http://www.01.ign.es/ign/layoutIn/volcaDetalleTerremotos.do

Reply

[jand]

GeoLurking says:

 February 4, 2012 at 07:26


Rescued from the page roll. Same plot.

GeoLurking says:
 February 4, 2012 at 06:36

Time vs Depth vs Mag.

http://i39.tinypic.com/t6z97l.png

—————–
 Carlos noted:

"It would very intersting if a graphic of tremor could be put at the top of your work, to see in real time how is the evolution of the tremor depending of the plots you marked and how many retarded is tremor respect EQ´s energy"

That's not a bad idea. I may have to fight the dimensions of the two plots (one of which would be a composite) but it is doable.

Good idea.

[jand]

Just posted on Avcan FB the islanders are feeling tremors again.

Last night trembled again strong at least I felt it in the mocanal
See Translation

[jand]

Avcan

A 3.4 near the coast between Cala Pinar and la Restinga, after having many seismic peace, from the beginning of December, since few days more restless estasba and think it is relaunched, has today been confirmed. If someone it has felt, remember to fill in the questionnaire macrosismico of IGN, is very important... so much that it is the only thing that the authorities give importance of truth... felt earthquakes.


1124870 04/02/2012 04: 40: 28 27.6508 - 18.0230 16.4 3.4 SW PINE.IHI iron


http://www.ign.es/IGN/layoutIn/geofisicaCuesmaCuesmaTerremotos.do

[jand]

Avcan

In the graph of evolution of the seismic energy released from the first of December, beginning to see a change and after another day 25 of January of 2012 2.8, the slope of the periods with low seismicity where is the release of energy and which was constant since the beginning of December, has changed and has become more steepIE... more energy is released from the 25th day, seems not very noticeable... But today with the quake of 2.7 and then 2.4, I made the chart and I've seen, in fact indicaria a first step in a revival, the truth is that something is has been revived now... must see if continuing the trend of slightly higher or returns to relax and is only an isolated spike. (Henry)

http://www.avcan.org/sismica/graficas/G784.jpg?t=1328299945

[jand]

Note 439 AVCAN - earthquake activity - VOLCANIC - island of iron - 04 February 2012-11: 00 pm peninsula - earthquake and volcanic activity continues moderada-alta, with a 3.4 as notable simicidad in the South, specifically in the tip of the Lajial area near the coast. Many microsismicidad in the spectrogram is still watching. Continues the signal of volcanic tremor in the eruptive zone of la Restinga, which although it is slightly down the amplitude of the signal, has increased its explosivity, with muchass hidromagmaticas, especially in the early morning explosions (see link). Magnitude between 2.7 and 1.1. New earthquakes 11. Earthquakes senses 1. Depths to 11.9 and 14.5km (two to 8.1 and 9.6 and other two to 15.9 and 16.4). 3 The day before yesterday. Yesterday 11. Today go 6. In total van 12138 earthquakes located in El Hierro by IGN from 9: 00 a.m. of the day 19 July 2011 (Henry).

[jand]

Avcan Copied

Seismicity in view during the last month: her present on the basis of a supposed stratigraphy which considered the substrate deformation caused by the weight of the island, substrates, possibly now occupied by a dense material of plutónico origin. The seismicity appears to be concentrated in the center of the island and where in your day should be the stratum of the tertiary or transition immediately to basaltic oceanic crust at the top,. It should be noted in this period the earthquake of 3.4 in violet, produced early this morning. He has exaggerated the depth and deformation of the ground by a factor of X 3, in order to better visualize it. (JR)

[jand]

Avcan FB Translated

The truth is that you reading can learn of these eruptions, knowing what happened in the past and Maria Elena reminded me something very important eruption of timanfaya:

"Every time evokes me more the eruptive behavior of 1730-36." Eruptions about to run out and rises in other areas of the rift. "According to Chronicles there were moments when the exhaustion of a rash solapaba with other precursors, and even declared eruptive activity"

The truth is that when lei las cronicas de the cure of Yaiza, recalled that it had when it began to decay in a mouth of eruptive activity or is turned off, they saw that that was the precursor of a new activity on another site, and shortly after the tremors began and was opened on the other hand, sometimes even without strong tremors...

Here's a recent document that brings new light on this rash with the collection of existing data... and try to order the course of this rash, the truth is that it is quite interesting (Henry)

http://www.academiadelanzarote.es/Discursos/Discurso%2022.PDF

[jand]

The chronicals of the priest of Yaiza re the Timafaya erruption.



An Eye Witness Account


The area which is now designated the Timanfaya National Park (the 'Fire Mountains') was once one of the most fertile areas of Lanzarote. Fertile, that is until the first day of September, 1730. That day saw the beginning of a six year period during which this area would be totally devastated by successive volcanic eruptions, not terminating until the 16th day of April, 1736. During all that period, there would only be short periods of calm.

The parish priest of Yaiza, Father Andrés Lorenzo Curbelo, recorded the happenings of the first few months of that disastrous six year period.

His account covers the period from the 1st. September, 1730, to the 28th. December, 1731.

He wrote:


"On the first day of September, 1730 between nine and ten oclock at night, the earth suddenly opened near Timanfaya, two miles from Yaiza. An enormous mountain emerged from the ground with flames coming from its summit. It continued burning for 19 days.

Some days later, a new abyss developed and an avalanche of lava rushed down over Timanfaya, Rodeo and part of Mancha Blanca. The lava extended over to the northern areas to begin with, running as fast as water, though it soon slowed down and ran like honey.

On September 7, a great rock burst upwards with a thunderous sound and the pressure of the explosion forced the lava going northwards to change direction, flowing then to the north west and west north west. The lava torrent arrived, instantly destroying Maretas and Santa Catalina in the valley.

On September 11, the eruption became stronger. From Santa Catalina lava flowed to Mazo, covering the whole area and heading for the sea. It ran in cataracts for six continuous days making a terrible noise. Huge numbers of dead fish floated about on the sea or were thrown on the shore.Then everything quietened, and the eruption appeared to have come to an end.

But on October 18, three new fissures formed above Santa Catalina. Enormous clouds of smoke escaped, flowing over the whole island, accompanied by volcanic ashes, sand, and debris. The clouds condensed and dropped boiling rain on the land. The volcanic activity remained the same for ten whole days with cattle dropping dead, asphyxiated by the vapours.


By October 30, everything had gone strangely quiet.


Two days later, however, smoke and ashes reappeared and continued until the 10th of the month. Another flow of lava spewed out causing little damage as the surroundings were already scorched and devastated.

A further avalanche started on the 27th, rushing at unbelievable speed towards the sea. It arrived at the shore on December 1 and formed a small island in the water where dead fish were found.

On December 16, the lava, which until then had been rushing towards the sea, changed direction, heading south west, reaching Chupadero which, by the following day, had turned into a vast fire.This quickly devastated the fertile Vega de Uga, but went no further.

New eruptions started on January 7, 1731, with spontaneous fireworks embellishing the sadness and desolation of the south. Powerful eruptions with incandescent lava and blue and red lighting crossed the night sky.

On January 21, a gigantic mountain rose and sunk back into its crater on the same day with such a terrifying sound, covering the island with stones and ashes. The fiery lava streams descended like rivers towards the sea with the ash, rocks and dense smoke making life impossible. That lava flow ceased on January 27.

But on the third day of February, a new cone threw out more lava towards the sea, which continued for 25 consecutive days.

On March 20 new cones arose, with more eruptions continuing for 11 days.

On April 6, the same cones erupted again with even more fury.

And on the 13th, two more mountains collapsed into their own craters making a frightful sound.

By May 1, the fire seemed to have burned out, only to start up again the following day, with yet another new cone rising and a current of lava threatening Yaiza itself.


By May 6, everything was quiet again and remained so for the rest of the month.


However, on June 4 an enormous land rift took place which opened up three new craters and accompanied by violent tremors and flames which terrified the local people.The eruption once more took place near Timanfaya. Different openings soon joined into one and the river of lava flowed down to the sea.A new cone appeared among the ruins of Maretas, Santa Catalina and Timanfaya. A crater opened on the side of a mountain near Maso spewing out white fumes which had never been seen before.

Towards the end of June, 1731, all the western beaches and shores were covered with an incredible number of dead fish of all species -- some with shapes which islanders had never known before.In the north west, visible from Yaiza, a great mass of flames and smoke belched forth accompanied by violent detonations.

In October and November more eruptions took place which worsened the islanders fears.

On Christmas Day, 1731, the whole island shook with tremors, more violent than ever before.

And on December 28, a stream of lava came pouring out of a newly risen cone in the direction of Jaritas. It burned the village and destroyed San Juan Bautistas chapel near Yaiza".


And so it went on.......

[jand]

It is the 18th-century eruptions that have added the spectacle to the landscape of Lanzarote. Between 1 September 1730 and 16 April 1736, the island was the scene of one of the greatest European fissure eruptions in historic time, in ten-ns of its output volume and duration. No previous historic eruptions had taken place on the island and the subsequent calm has since been broken only by three very brief out-bursts in 1824. One-quarter of Lanzarote was given an entirely new landscape and farms and villages were buried completely in the west-central parts of the island. The black, grey or reddish-brown lavas in deep craters, dark pits, jagged ridges, smooth ash cones or rugged flows give a remarkably brutal impact to this, the starkest landscape in the Canary Islands, which has scarcely a twig of vegetation growing upon it.



Activity took place along a belt of fissures some 4 km wide, stretching over a total distance of 18km. It occurred in five distinct phases and formed over 30 cinder cones, many spatter cones and hornitos, as well as widespread basaltic flows.



The first phase had two separate parts. Activity lasting from 1 September until 19 September 1730 constructed the Los Cuervos cone, 8km northeast of Yaiza, and emitted flows that reached the northwest coast. After three weeks of tranquillity, the outburst resumed on 10 October, some 1.5 km to the north. Fluid lavas poured forth again, covering most of those emitted from Los Cuervos, but also spreading towards Yaiza. At the same time, the Santa Catalina cone erupted over the destroyed village and expelled the largest volume of fragments of the whole eruptive period. A group of vents 1 km to the northwest destroyed Mazo. They formed Pico Partido ("cloven"), a cone almost 200m high, whose jagged cloven black outline is the most striking in Lanzarote. It is crowned by a large spatter cone, with three aligned craters, and flanked by a ruff ring, bordered by the remnants of lava cascades, and containing a congealed lava lake, itself drained by an incompletely roofed tube, emphasized by lichen growth, that winds its way down the cone's lapilli-strewn flanks. Like the olivine xenoliths scattered on its slopes, Pico Partido is a collector's item for admirers of basaltic forms.



The second phase may have begun on 7 March 1731 - and certainly by 20 March   and it lasted until June 1731. Activity concentrated on four vents that formed the   Montanas del Senalo, less than 1 km south of Pico Partido. It is possible  that Corazoncillo, a distinctive cone of rose-pink lapilli 150m high, was also formed   at this time. The more viscous lavas of this phase rarely exceeded 5 km in length, but   still managed to approach the outskirts of Yaiza.



The third phase lasted for six months. Activity suddenly switched 12km westwards along what was to become the main fissure. It began in June 1731 with an   offshore Surtseyan eruption that terrified the population but failed to build a permanent islet. Soon afterwards eruptions began on land and progressed intermittently eastwards along the fissure. Successive vents formed the cinder cones of El Quemado ("burnt") in June, Montana Rajada ("split") in July and the four Quemadas cones between October and December 1731 and January 1732, and their lavas now coat much of western Lanzarote. It was these lava-flows that caused the people of Yaiza to abandon their homes for Gran Canaria early in January 1732.



Activity of the fourth phase was confined to the middle section of the main fissure at Timanfaya from the winter of 1732. As no documentary evidence has been   brought to light, it is uncertain how long this phase lasted, but it seems to have continued for at least a year - and probably simmered for much longer. It constructed emphasized by lichen growth, that winds its way down the cone's lapilli-strewn flanks. Like the ohvine xenoliths scattered on its slopes, Pico Partido is a collector's item for admirers of basaltic forms.



The second phase may have begun on 7 March 1731 - and certainly by 20 March and it lasted until June 1731. Activity concentrated on four vents that formed the Montanas del Senalo, less than 1 km south of Pico Partido. It is possible that Corazoncillo, a distinctive cone of rose-pink lapilli 150m high, was also formed at this time. The more viscous lavas of this phase rarely exceeded 5 km in length, but still managed to approach the outskirts of Yaiza.



The third phase lasted for six months. Activity suddenly switched 12km westwards along what was to become the main fissure. It began in June 1731 with an offshore Surtseyan eruption that terrified the population but failed to build a permanent islet. Soon afterwards eruptions began on land and progressed intermittently eastwards along the fissure. Successive vents formed the cinder cones of El Quemado ("burnt") in June, Montana Rajada ("split") in July and the four Quemadas cones between October and December 1731 and January 1732, and their lavas now coat much of western Lanzarote. It was these lava-flows that caused the people of Yaiza to abandon their homes for Gran Canaria early in January 1732.



Activity of the fourth phase was confined to the middle section of the main fissure at Timanfaya from the winter of 1732. As no documentary evidence has been brought to light, it is uncertain how long this phase lasted, but it seems to have continued for at least a year - and probably simmered for much longer. It constructed the large intersecting reddish cinder cones of Timanfaya, many spatter cones, and lava-flows that spread both northwards and southwards.



The fifth phase of the eruption saw a farther eastward shift along the main fissure in late March 1736. The small Las Nueces cinder cone was formed in a few days and very fluid lavas gushed out which made their way to the southeast coast 20km away. In early April, eruptions lasting ten days built the Colorada ("red-coloured") cinder cone 1 km farther east, and sent out flows that almost reached the north coast. This eruption brought 5Y2 years of activity in Lanzarote to a close on 16 April 1736.



The early stages of the eruption were recorded in two independent sources. The first, the diary of the parish priest of Yaiza, is now lost, but survives, summarized, in translation in German and French. The second source is the correspondence, preserved in the Spanish national archives, between the Royal Court of Justice of the Canary Islands and the committee established on Lanzarote to manage the crisis. The diary ended on 28 December 1731 and the archive correspondence on 4 April 1731, so that only the initial stages of the eruption were recorded directly.

 For Father Andres-Lorenzo Curbelo, the parish priest of Yaiza, it was like this:



 On the first of September 1730 between nine and ten in the evening, the earth suddenly opened up near the village of Timanfaya, two leagues [in fact, 8 km] from Yaiza. During the first night an enormous mountain [Los Cuervos] rose up from the bosom of the Earth and it gave out flames from its summit for 19 days. A few days later, a fissure opened up probably at the foot of the newly formed cones, and a lava-flow quickly reached the villages of Timanfaya, Rodeo and part of Mancha Blanca. This first eruption took place east of the Montana del Fuego, halfway between that mountain and Sobaco. The lava flowed northwards over the villages, at first as fast as running water, then it slowed down until it was flowing no faster than honey. A large rock arose from the bosom of the Earth on 7 September with a noise like thunder and it diverted the lava flow from the north towards the northwest. In a trice, the great volume of lava destroyed the villages of Maretas and Santa Catalina lying in the valley. On 11 September, the eruption began again with renewed violence. The lavas began to flow again, setting Mazo on fire and overwhelmed it before continuing on its way to the sea. There, large quantities of dead fish soon floated to the surface of the sea, or came to die on the shore. The lavas kept flowing for six days altogether, forming huge cataracts and making a terrifying din. Then everything calmed down for a while as if the eruption had stopped altogether. But, on 18 [in fact, 10] October, three new openings formed just above Santa Catalina, which was still burning, and gave off great quantities of sand and cinders that spread all around, as well as thick masses of smoke that belched forth from these orifices [Santa Catalina and Pico Partido] and covered the whole island. More than once, the people of Yaiza and neighbouring villages were obliged to flee for a while from the ash and cinders and the drops of water that rained down, and the thunder and explosions that the eruptions provoked, as well as the darkness produced by the volumes of ash and smoke that enveloped the island ... On 28 October, the livestock all over the nearby area suddenly dropped dead, suffocated by an emission of noxious gases that had condensed and rained down in fine droplets over the whole district. Calm returned on 30 October.



Ash and smoke started to be seen again on 1 November 1730, and they were erupted continually until 10 November, when a new lava-flow appeared, but it only covered those areas that had already been buried by previous flows. On 27 November, another lava-flow [from Pico Partido] rushed down to the coast at an incredible speed, reached the shore on 1 December and formed a small islet that was soon surrounded by masses of dead fish. On 16 December the lavas changed direction and reached Chupadero, which was soon transformed into what was no more than an enormous fire. These lavas then ravaged the fertile croplands of the Vega de Uga [1 km east of Yaiza]. On 7 January 1731, new eruptions [from Pico Partido] completely altered the features formed before. Incandescent flows and thick smoke emerged from two openings in the mountain. The clouds of smoke were often traversed by bright blue or red flashes of lightning, followed by thunder as if it were a storm. On 10 January 1731, we saw an immense mountain rise up, which then foundered with a fearsome racket into its own crater the self-same day, covering the island in ash and stones. Burning lava-flows descended Eke streams across the malpais as far as the sea. This eruption ended on 27 January 1731. On 3 February, a new cone grew up [Montana Rodeo] and burned the village of Rodeo. The lavas from this cone crossed the whole area and reached the sea. These lavas continued to flow until 28 February. On 7 March, still further cones were formed, and their lavas flowed north towards the sea and completely destroyed the village of Tingafa. New cones with craters [Montanas del Senalo] arose on 20 March and continued to erupt until 31 March. On 6 April, they started up again with even greater violence and ejected a glowing current that extended obliquely across a previously formed lava-field near Yaiza. On 13 April, two mountains [of the Montanas del Senalo] collapsed with a terrible noise. On 1 May, the eruption seemed to have ceased, but, on 2 May, a quarter of a league farther away, a new hill arose and a lava-flow threatened Yaiza. This activity ended on 6 May, and, for the rest of the month, this immense eruption seemed to have stopped completely. But, on 4 June, three openings occurred at the same time, accompanied by violent earthquakes and flames that poured forth with a terrifying noise, and once again plunged the inhabitants of the island into great consternation. The orifices soon joined up into a single cone of great height from which exited a lava-flow that rushed down as far as the sea. On 18 June a new cone was built up between those that already masked the ruins of the villages of Mazo, Santa Catalina and Timanfaya. A crater opened up on the flanks of this new cone that started to flash and expel ash. The cone that had formed above the village of Mazo then gave off a white gas the like of which nobody had ever seen before. [The third phase began on the west coast.] ... Then, about the end of June 1731, the whole west coast was covered by enormous quantities of dead fish of all kinds, including some that had never been seen before. These eruptions took place under the sea. A great mass of smoke and flames, which could be seen from Yaiza, burst out with violent detonations from many places in the sea off the whole west coast. In October and December, further eruptions [of the Montanas Quemadas] renewed the anguish of the people. On Christmas Day 1731 the whole island was affected by the most violent of all the earthquakes felt during the previous two [sic] years of disasters. On 28 December a new cone [in the Montanas Quemadas] was formed and a lava-flow was expelled from it southwards towards Jaretas. The village was burned and the Chapel of San Juan Bautista near Yaiza was destroyed.

[jand]

After reading the above is this not a bit uncanny could we be talking about whats happening in El Hierro ??

Reply


GeoLurking says:

 February 4, 2012 at 20:15


I think that your posting shows what could happen over timec it vividly illustrates the potential of what a Canarian eruption is capable of.

With thatc and then a scrutiny of the terrain features present on El Hierroc itfs pretty clear that the island has had itfs own versions of the 1730s Lanzarote event(s).

All the more reason for Pevloca/Involcan to quit playing the political bullpoo games.

As I have notedc gIfm not a geologist.h That statement alone has made people more knowledgeable than I a bit reticent about what it can or can not do. I would hope that if I am incorrect, that they speak up and tell me Ifm incorrect.

The low end tremor of about 0.59Hz is now quite visible at EFAM and CFUE. It has been noted, that this is probably from the deep region down near/in the mantle. The brunt of quakes over the last 34 or so days, has been in the oceanic crust layer, with fewer (but still present) quakes in the Jurassic era sediment. At this depth, collapsing feed paths arenft really gonna show up with more and more quakes. It would show up with lessening quakes. To me that indicates that the system is still under a gfeedingh scenario and that more magma is being mobilized.

Given that the Canaries are a hotspot feature, that Ur/Th points to a deep source, and that the tremor points at that alsoc (as do the quakes), and that Lanzarote illustrates what could happenc well, letfs just say that Pevloca/Involcan are being utter and complete buffoons for not being more forthcoming with information.

In the tradition of the 1840Å's American Westc. a lynching might be in order if they get someone killed with their silence.

Reply

[jand]

OT but look at all the earthquakes (shown in red) in Iceland over the last four hours !!!!!!

http://en.vedur.is/earthquakes-and-volcanism/earthquakes/




Carl le Strange says:

 February 4, 2012 at 20:49


I have solved the mystery with Iceland turning into a christmas tree...

There is actually a small swarm at Helisheidarvirkjun. But there is nothing unusual about it, and those that are locationed outside of Helisheidarvirkjun never happened. And the quakes below 50% solution grade at Myrdalsjökull never happened.

They are all ghosts. From this little party.

Saturday
 04.02.2012 19:24:21 65.709 -27.208 4.7 km 4.5 39.75 124.8 km WNW of Bjargtangar
 Saturday
 04.02.2012 19:24:20 61.955 -25.713 5.0 km 5.0 58.28 196.3 km SSW of Eldeyjarboði
 Friday
 03.02.2012 05:19:01 59.736 -27.419 10.0 km 3.3 99.0 458.5 km SSW of Eldeyjarboði
 Friday
 03.02.2012 05:16:25 59.699 -27.415 10.0 km 3.3 99.0 462.2 km SSW of Eldeyjarboði
 Friday
 03.02.2012 03:17:16 59.967 -28.009 10.0 km 3.4 99.0 449.4 km SSW of Eldeyjarboði
 Friday
 03.02.2012 03:17:04 59.879 -27.730 10.0 km 3.1 99.0 451.2 km SSW of Eldeyjarboði

[jand]

http://neic.usgs.gov/neis/bulletin/neic_b0007vv9_t.html

Theoretical P-Wave Travel Times

Magnitude 5.1 CENTRAL MID-ATLANTIC RIDGE
Saturday, February 04, 2012 at 18:01:46 UTC

[jand]

The stain taken this morning.

[jand]

http://www.bbc.co.uk/programmes/p00gfcjk

Magma on the move.

[jand]

Carlos says:

 February 5, 2012 at 11:36


As Henry says, and 100% agree with him ... the eruption continues, degassing and a surface active volcano ERUPTION IN PHASE emitting lava in the bottom of the sea and grow the volcano ... about 130 m from the surface according to reports. Add that looks like the yellow color in the spectrogram and goes up to 8 Hz, which long ago was not the case ... As Henry says, that can make those look degassing at the surface, while still emitting material and forming volcanic edifice down. For me still has not gone outside the last seismic energy produced and, the system has to continue to release that pressure by the eruption and, in case no erupcón were freed by the system would remain enclosed within the feeding back new microseismicity or seismicity until lograse flow to the outside ... Too bad watching the bathymetry at the elevation is very difficult to see the anchor points that could ensure rapid growth of the volcano. Because it's impressive growth in the base which took advantage of the anchor block island that was there ... If the volcano climbs the escarpment of the canyon, I certainly am not able to distinguish whether there is going to keep going much material or may be some costs abajode anchor or obstacle that you can make for a more rapid growth ...
http://oi42.tinypic.com/10pdnas.jpg

[jand]

Emission of CO2 has tripled.

http://www.gobiernodecanarias.org/cmayot/calidadaire/tiemporeal.jsp


Carlos says:

 February 5, 2012 at 14:25


Atention...
 Since many many many ,many many days ago the value of CO was 0.06 without changes. Just now this value has risen to triple.
 http://www.gobiernodecanarias.org/cmayot/calidadaire/tiemporeal.jsp

[jand]

Note 440 AVCAN - earthquake activity - VOLCANIC - island of HIERRO - 05 February 2012-11: 30 pm peninsula - earthquake and volcanic activity is continuing moderate seismicity located under the area of summits. Besides looks microsismicidad detected but not located in the spectrogram. Continues the signal of volcanic tremor in the eruptive zone of la Restinga, which although it is slightly increasing the amplitude of the signal, yesterday was rising, with a maximum at midnight more or less and then it has fallen, but now this rising again and continuing the explosivity, although less than yesterday, with some explosions hidromagmaticas. Magnitude between 2.1 and 1.3. New earthquakes 2. Depths at 10.4 and 11.8 km. yesterday 11. Yesterday 7. Today is 1. In total van 12140 earthquakes located in El Hierro by IGN from 9: 00 a.m. of the day 19 July 2011 (Henry).

[jand]

http://tu.tv/videos/infierno-volcan

This video is in spanish but has photos maps live footage etc.

[jand]

Volcano cafe.


EHIG, EOSO and EGOM are looking interesting:

http://www.ign.es/ign/head/volcaSenalesAnterioresDia.do?nombreFichero=EHIG_2012-02-05&ver=s&estacion=EHIG&Anio=2012&Mes=02&Dia=05&tipo=2
 http://www.ign.es/ign/head/volcaSenalesAnterioresDia.do?nombreFichero=EOSO_2012-02-05&ver=s&estacion=EOSO&Anio=2012&Mes=02&Dia=05&tipo=2
 http://www.ign.es/ign/head/volcaSenalesAnterioresDia.do?nombreFichero=EGOM_2012-02-05&ver=s&estacion=EGOM&Anio=2012&Mes=02&Dia=05&tipo=2

Reply

[swl]

So keeping this very simple and in one word only what's the percentage probability of a major eruption?

[jand]

Talla says:

 February 5, 2012 at 16:35

CHIE is also changing: although the signal does not appear stronger there is a lot more of the yellow colour in the chart.

Reply

Carlos says:

 February 5, 2012 at 16:58


the values of CO are not dued to the storm...
 The increasing of the yellow colour at CHIE spectrogram is consistent with the new values of CO.
 The CO values are triple than some weeks ago... This value was highly stable during the last weeks at 0,06
 2 hipothesys:
 1 malfunction
 2 increasing in gases... This is coherent with the yellow colour rising at spectrogram and with the mesurements of CO.


http://www.ign.es/ign/head/volcaSenalesAnterioresDia.do?nombreFichero=CHIE_2012-02-05&ver=s&estacion=CHIE&Anio=2012&Mes=02&Dia=05&tipo=2