Donnerstag, 2. Oktober 2014

THE CANARY HOTSPOT- volcano islands blog and forum- OCTOBER 01- 30 - 2014

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CANARY ISLANDS- ISLAS CANARIAS- KANARISCHE INSELN


^background image by wikicommonsBerthold Werner/ TEIDE Volcano Caldera/ Teneriffe/Islas Canarias
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ACTIVITY/ OCTOBER   01- 31 2014 


internal links > START HOME SOLAR BLOG VOLCANO WATCH VOLCANO MAPS external links > IGN AVCAN AVCAN/ fb. EMSC GVP NOAA






Activity report here will ony follow, if new events take place. For other environmental reports, please visit the solar and terrestrial blog on my homepage
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ACTIVITY REPORTS-  OCTOBER   01- 30 2014 


OCTOBER 21- 31- 2014:


not much was happening during the past 10 days. On November 1st, another solar proton event (SEP occured with first protons impacting into the geomagnetic field after 14 UTC:




This is above the Atlantic and pretty  close to the longitude of the Canaries and Iceland. Indeed magmatic earthquake activity near to this longitude significantly rose on November 2nd with three stronger  earthquakes on the northern Mid Atlantic ridge and a new  increase of the magmatic activity below Iceland which had already  gradually and slowly decreased oner the past 2 weeks :


M 5.3 - NORTHERN MID-ATLANTIC RIDGE - 2014-11-02 09:03:03 UTC



All though the Canary volcano system and hot spot seems to react very  slowly on solar SEPs than most other hotspots ( such as Yellowstone and Hawaii where the activity has again risen significantly after the latest SEPs as on all others before ) the name el Discreto describes it best . Its just not well known but surface volcanic activities remain still a rsik as long as the magma intrusion for the earthmantle continues and doies not really stop at least for some montghs

INCREASE OF MAGMATIC ACTIVITY VERY LIKELY


This solar proton impact however will very likely also lead to an rather slight increase of  activity on the Canary hotspot below El Hierro. Magma however was already pretty close to the surface once this year in June 2014,  when  an isolated event was registered just 5 km below Sea level on the geograophic position of El Teide and interprated even by staff of AVCAN as an rise  or a decline of magma below the volcano ( see earlier reports) , which is with el cumbre vieja on von La Palma the only but largest intact stratovolcano on the islands ( while all others such as La Gomera, Gran Canaria and parts of El Hierro  have already collapsed to a Caldera that poses the lowest volcanic threat of all volcano types.)  


EventoFechaHora(GMT)*Latitud Longitud Prof.
(km)
Int. Máx.Mag.Tipo Mag. (**)LocalizaciónInfo
130362430/10/201419:57:4927.7452-18.106111 1.7mbLgW FRONTERA.IHI[+]
130310729/10/201411:29:4327.7175-18.000911 2.3mbLgNW EL PINAR.IHI[+]
130304329/10/201407:32:1528.2114-16.1669  1.6mbLgATLÁNTICO-CANARIAS[+]
130250427/10/201410:33:1727.7305-18.021312 1.6mbLgSW FRONTERA.IHI[+]
130228325/10/201403:38:4827.7889-18.09449 1.5mbLgNW FRONTERA.IHI[+]
130223924/10/201422:04:3828.0599-16.157228 1.9mbLgATLÁNTICO-CANARIAS[+]


OCTOBER 14- 20- 2014:



magmatic activity below El Hierro  increased a bit after October 20. There are still no seismic data from Gran Canaria. Tremor activity on all other islands however is currently very low.



EventoFechaHora(GMT)*Latitud Longitud Prof.
(km)
Int. Máx.Mag.Tipo Mag. (**)LocalizaciónInfo
130183122/10/201423:01:3927.7185-18.0336122.5mbLgSW FRONTERA.IHI[+]
130183222/10/201422:59:2527.7215-18.0367111.6mbLgSW FRONTERA.IHI[+]
130129320/10/201408:59:3827.7183-18.1091191.6mbLgSW FRONTERA.IHI[+]
130126420/10/201403:31:2027.7074-18.0240121.7mbLgW EL PINAR.IHI[+]
130116518/10/201411:18:2027.6970-18.028115II2.6mbLgW EL PINAR.IHI[+]
130114318/10/201409:08:2928.1447-16.10451.8mbLgATLÁNTICO-CANARIAS[+]
130095816/10/201414:12:4827.7523-18.0311101.6mbLgW FRONTERA.IHI[+]
130049314/10/201402:12:3227.7367-18.0375121.6mbLgSW FRONTERA.IHI[+]
130047813/10/201417:42:2927.6758-18.2732212.8mbLgSW FRONTERA.IHI[+]



OCTOBER 05- 06 - 2014:


Three quakes on October 05 and 3 more on October 06. Seismicity is increasing and the depths of the quakes below El Hierro is first time lower than 10 km:

EventoFechaHora(GMT)*Latitud Longitud Prof.
(km)
Int. Máx.Mag.Tipo Mag. (**)LocalizaciónInfo
129924506/10/201411:13:3327.7069-18.009991.7mbLgW EL PINAR.IHI[+]
129916906/10/201401:33:0527.7024-18.0283112.2mbLgW EL PINAR.IHI[+]
129915706/10/201400:35:3627.7168-18.016291.6mbLgW EL PINAR.IHI[+]
129915506/10/201400:20:5227.7288-18.0166111.5mbLgSW FRONTERA.IHI[+]
129915205/10/201423:46:3627.7310-18.0210121.7mbLgSW FRONTERA.IHI[+]
129915105/10/201423:40:5427.7283-18.0170112.0mbLgSW FRONTERA.IHI[+]
129914105/10/201419:41:4227.7157-18.0338111.5mbLgW EL PINAR.IHI[+]


TREMORS:


The spectrogramm of El Hierro suggests hot magma below the island:



Tremors increased also and are currently strongest on La Gomera and Teneriffe. The seismograph on Gran Canaria is still out of order


DEFORMATION:

There was no further lift  up process on El Hierro during  past  3 months, what does not mean, that the magma intrusion has come to a stop.Would be logical,  that- since the magma can flow to somewhere else- the  strong expanding force, magma develops while surging up from the earth mantle to the Earth crust just does not built up its pressure below El Hierro anymore, but  somewhere else. However: there are no technical means today, those would make such a magma flow or bubble visible in that depth, where it currently happens: Means:  we don`t know anything for sure , thus all  about this activity is based on suggestions.


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OCTOBER 04 - 2014

 A some  stronger 2.5 quake was registered on Oct 04 near El Pinar and  was also reported (as all quakes within Europe  above M 2 usually are)  by ESMC:
There was no further shallow earthquake yet since Oct 02..Thus this was another isolated event, which nevertheless indicates,  that magma is someway further on its way to the surface..



EventoFechaHora(GMT)*Latitud Longitud Prof.
(km)
Int. Máx.Mag.Tipo Mag. (**)LocalizaciónInfo
129902304/10/201406:39:4227.7080-18.0575222.5mbLgW EL PINAR.IHI[+]
129873003/10/201402:11:5027.7055-18.0811141.5mbLgSW FRONTERA.IHI[+]
129872703/10/201401:41:2827.7054-18.0294131.6mbLgW EL PINAR.IHI

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OCTOBER 02- 2014



(uncorrected draft )

Another likely shallow M 1.9 quake took place  today near Puerto de La Cruz 1- 2 km off the coast of Teneriffe.

 The Spanish IGN  has not issued about the exact depth of the event. Yesterday the  with 3 km yet most shallow earthquake since end of the first activity pga´hase in 2012 was registered ion the valle delo Golfo on El Hierro. Its time now to observe the activity very closely , as this could be the last indicator  before the magma now might break through to the surface. either in a submarine eruption or anywhere else... Noone knows where, but Teneriffe.- as seimic data showed over mointh, is since the thrid activity phase began in late 2013, the place where the act magmatric activity concentrates ( see, earlier reports)


EventoFechaHora(GMT)*Latitud Longitud Prof.
(km)
Int. Máx.Mag.Tipo Mag. (**)Localización
129849301/10/201421:09:0328.4233-16.58221.54W PUERTO DE 






This would  not the first time, that the IGN or AVCAN turns off seismometers or hold back other information on the current volcanic/ seimic activity on the Canaries. ON the oine side the tiouzrist business is most imprtant for Spain and Spanish  employees. On the oither side, its seems turue that the most people know little about the volcanism on the Canaries, which are like the volcanoes oin icleand  situated in a continental spreading tone-. the Atlantic. In those regions magma , if it begins to rise upwards forom the Earth mantkle ( intrusion) first  finds many  cracks, fissures hollow spaces and caves  where it can rund to, before it would at any time reach the surface.



This is why these violcanoes are so silent..
Nevertheless- since December 2013 until now - a more or less continuous magma intrusion took  place form the hot spot and mantle plume  below El Hierro deep below the islands asnd the amount of magma that assembled in the old caldera between ths islands cannot be monitored or really estimated. Hotm spopt magma is very hot and viscous and contains no gazes,  in earlier articles I decsribed the incredible expansion forces, thos effect on this magma as more iot rsies up . The other effects is, that it gets even hotter as more it expands by the decreasing gravity pressure. Its com,parable to a refrigerator, where gazes are first compressed and comsume heat energy from their environment when they expand again. ( cooling effect/ Jule Thomson principle)

what finally might cause an explosive eruption, is when that magma rises upo to  regions in the earth curst those contain water.. The reaction of magma with water ( forming steam, but also hydrogen or Sulforhydrogen oither high energetic gazes ) is meanwhile believed to responsible for almost all explosive volcano events.The Canary islands are situated on a plateau that rises up to 3.700 m below zero.( sea level), thus magma might come earlier  in contact withg water than on continental formations

But baiscally the magma is pressed upwards form tghe earth and as long such a magma intrusion continues( what can only be monitored by theses weak sesimic / magmatic quakes it produces, while it breaks ( moves upwards through the earth crust. On the other side ,chambers where this magma then assembles and gathers anyway in the underground filled with hot magma do not cause any kinds of seimic shocks . THey cause socalled harmonic tremors on the seismographs , but this onlxy gives an idea about how much magma might have assembled . However. there  is no way to monitor or even to find those magma chambers or magma bubbles in the undergiround,  .These storages ar just to deep and no driller or  material could withstand the temperatures there in a depth of more than 5 km..
a § D model of the seimic activity within the  Yellowstone park finally turned out not to be the magma chamber ( if there is one?) , but the mantle plume  .

TREMORS:


Tremors are harmonic but have low amplitudes on Teneriffe and the other islands:

< Temerife/ 20141001


The seimograph on Gran Canaria however seems to be out of order or servide . The spectrogram seems to be overloaded., as it was often the case with the seismograph on Teneriffe in the first months after the  begin of the third activity phase in December 2013, when activzty was strongest:



MODVOLC HOT SPOT SURVEY/ 20141002:



To my impression, there is not much difference  to see compared the the images of last months


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useful links/ nützliche Links:
EMSC
Global Volcanism Program
Facebook Seite der AVCAN
IGN (Spain) Serie El Hierro
Volcano-discovery.com
Earthquake- report. com
MEDIEN:
KARTEN:
SOLAR (SAT)
SOLAR (info)

REAL TIME FEATURES:
(click on the images to enlarge them)

letztes Beben(Kanarische Inseln ( IGN)



Bebenmap( El Hierro)


GPS deformation measure stations on El Hierro

MODVOLC/ Hawaii  thermal alerts:


^
near real time thermal alert
for El Hierro, la Palma, Teneriffe and la Gomera ( updated once per week)

volcano discovery. com : Earthquake within 30 km radius around El Hierro:


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previous posts those contain articles about the Canary volcanism in general: 


February 10- 16- 2014

 January 15- 19- 2014

January 20- 27- 2014




Mnt Teide ( Teneriffe)

related free online sources:


VOLCANOES:

"Eruptions that shook the world"

a very interesting and freely avaible  source how volcanoes work where you find all what you want to know about volcanoes

Sources of the volcanic activity at El Hierro ( since 2011):

Some may like to read a review on the volcanic activity below El Hierro in 2011:
Here is a data based report  by earthquake .com- an excellent site regularly reporting (what you never get in the news) about Earthquakes and related volcanism

worldnews.com: Special environmental reports about the Canaries 

Miscanellous:
 Geschichte Teneriffas (deutsch)





 Fataga ( Gran Canaria)



 San Cristóbal de La Laguna in 1880 (Tenerife)




Caldera de Taburiente National Park (La Palma).




Garajonay (La Gomera)




   (BBC/ 20111204)Canary Island volcano: A new island in the making?

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