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Earth of fire

Actualité volcanique, Articles de fond sur étude de volcan, tectonique, récits et photos de voyage

Articles avec #actualites volcaniques catégorie

Publié le par Bernard Duyck
Publié dans : #Actualités volcaniques
Fogo - eruptive plume - photo Fogo News 13/01/2015

Fogo - eruptive plume - photo Fogo News 13/01/2015

Despite a seeming of decline last week, the eruption of Fogo is not completed.

On January 12, at the end of afternoon, a series of loud explosions lasted approximately about two hours (15h30-17h10). A dense and dark plume is formed, amount to an altitude of 2,000 meters before moving eastward.

Fogo - the active cone - photo Fogo News 01/13/2015

Fogo - the active cone - photo Fogo News 01/13/2015

Between Monte Beco and Monte Saia, noises associated with underground progression of  lava were collected; a small forked lava flow is formed along a small crack, at 2-3 meters from the lava tube at the base of the cone ... according to volcanologists from the University of Cape Verde, the lava flow has probably formed in relation to the explosive event of 12.01.
 

Fogo - forked lava flow in relation to the activity of 12/01/2015 - photo Capo Verde Universidad

Fogo - forked lava flow in relation to the activity of 12/01/2015 - photo Capo Verde Universidad

On January 13, the eruption was actively pursued, with rhythmic and continuous explosions, forming an ash plume of 1,500 meters.

Measures practiced by scientists at the University of Cape Verde, give a temperature of lava as the base of the cone than at the lava fronts of about 100 ° C (measures with the thermal camera). SO2 rate of 12 January is 1,200 tons per day. Lava fronts remain stagnant.

According to Sónia Silva, it was necessary to wait more than a week to see the behavior of the volcano ... no expected date for the end of the eruption.

Fogo - left, Gas and ash explosion on 13.01.2015 / 18.15 - Photo Volcanológico Observatorio de Cabo Verde. - Right, the time evolution of the average weekly value of sulfur dioxide (SO2) emissions in the atmosphere by the recent volcanic eruption of Fogo, Cape Verde - a click to enlargeFogo - left, Gas and ash explosion on 13.01.2015 / 18.15 - Photo Volcanológico Observatorio de Cabo Verde. - Right, the time evolution of the average weekly value of sulfur dioxide (SO2) emissions in the atmosphere by the recent volcanic eruption of Fogo, Cape Verde - a click to enlarge

Fogo - left, Gas and ash explosion on 13.01.2015 / 18.15 - Photo Volcanológico Observatorio de Cabo Verde. - Right, the time evolution of the average weekly value of sulfur dioxide (SO2) emissions in the atmosphere by the recent volcanic eruption of Fogo, Cape Verde - a click to enlarge

Sources :

- Université du Cap-Vert - Informação sobre a atividade eruptiva da ilha do Fogo de 08 a 12 de janeiro de 2015 - link

- Fogo News / Facebook

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Publié le par Bernard Duyck
Publié dans : #Actualités volcaniques

The eruption of Hunga Ha 'Hapai in the Tongan archipelago, continues without images ... unfortunately due to cloud cover.

New Zealand 
authorities issued an aviation alert following the Wellington VAAC report relating a "dark volcanic cloud" emitted by the volcano, at more than 4,800 meters high and up to 18 km from the eruptive site. According to the media Stuff.nz, the eruptive plume above the cloud cover, and was photographed by a passenger during a flight to Tonga.

The Air New Zealand flights from Auckland to Samoa were diverted, while Fiji Airways canceled a flight Nadi -Tonga

Sources:

- Stuff. Nz - Tongan volcano eruption leads to flight diversions - link

- VAAC Wellington / met service  - link

Hunga Ha 'Hapai - ash advisory 12.01.2015 / doc VAAC Wellington

Hunga Ha 'Hapai - ash advisory 12.01.2015 / doc VAAC Wellington

Sinabung eruption continues with his daily lot of plume and pyroclastic flows.

After Sunday's lahars, ash fallout have particularly affected the village of Berastagi this January 12th. Volunteers distribute masks to villagers to protect the airway.

In its edition today, the Jakarta Post reminds the situation of displaced people who no longer receive local government support ... no longer considered as refugees. Only families in the red zone, or within a radius of three kilometers, still receive some assistance. The displaced numbered 3549 in December 2014, including 2,433 still living in shelters.

Sources:
Jakarta Post - Thousands of Mt. Sinabung evacuees receive no help - link
 

Sinabung - co-pyroclastic plume 01.12.2015 / 14h05-14h45 - photo Bidar Sinabung

Sinabung - co-pyroclastic plume 01.12.2015 / 14h05-14h45 - photo Bidar Sinabung

Sinabung - co-pyroclastic plume 01.12.2015 / 14h05-14h45 - photo Bidar Sinabung

Sinabung - co-pyroclastic plume 01.12.2015 / 14h05-14h45 - photo Bidar Sinabung

Sinabung 01/12/2015 - Ash on Berastagi - a click to enlarge - photos endrolew@Sinabung 01/12/2015 - Ash on Berastagi - a click to enlarge - photos endrolew@

Sinabung 01/12/2015 - Ash on Berastagi - a click to enlarge - photos endrolew@

Sinabung: mud and ash everywhere! - Photo AP - Binsar Bakkara & Twitter Mitigasi BencanaSinabung: mud and ash everywhere! - Photo AP - Binsar Bakkara & Twitter Mitigasi Bencana

Sinabung: mud and ash everywhere! - Photo AP - Binsar Bakkara & Twitter Mitigasi Bencana

In Iceland, the lava field Holuhraun reached to January 10 over 84 km².

Scientists at the University of Iceland estimate the thickness of the lava field averaged 10 meters, 12 meters in the center and 14 meters in its western part. The lava emitted volume is estimated at 1.1 cubic kilometers, enough to considered the eruption as Flood basalt.

Subsidence of the caldera of Bárðarbunga decline from 80 cm to 25 cm / day, a sign that less magma comes to the surface ... satellite observations also shows a decline: the heat flux fell from over 20 gigawatts in early September less than 5 gigawatts in late November, but that does not mean the end of the eruption.

Sources:
- Icelandic Met Office
- Iceland Review
- University of Iceland

Holuhraun - stir in the lava lake - photo University of Iceland 10/01/2015

Holuhraun - stir in the lava lake - photo University of Iceland 10/01/2015

Holuhraun - the lava lake within its walls - photo University of Iceland 01/10/2015

Holuhraun - the lava lake within its walls - photo University of Iceland 01/10/2015

Holuhraun - photo University of Iceland 10/01/2015

Holuhraun - photo University of Iceland 10/01/2015

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Publié le par Bernard Duyck
Publié dans : #Actualités volcaniques
Etna - the strombolian explosion 10.01.2015 / 4:28 p.m. UTC - webcam Montagnola INGV Catania

Etna - the strombolian explosion 10.01.2015 / 4:28 p.m. UTC - webcam Montagnola INGV Catania

Etna in Sicily, the crater of Voragine continues to operate with intensity in decline and less frequent emissions ... the strombolian activity is down, and the lowering level of magma in the eruptive conduit leads to collapses and emissions of ash mixed with gases.

On the evening of January 9, ash emissions were accompanied by expulsion of incandescent pyroclastic materials falling sometimes on the outer flanks of the central summit cone. Ash emissions continued on 10 in the morning; after a break, they resumed later in the afternoon, accompanied by Strombolian explosions, and without significant changes in the amplitude of tremor (INGV Catania - iEtna)

Fogo / Cape Verde - on 08.01.2015 - decline of the eruption - photo OVCV

Fogo / Cape Verde - on 08.01.2015 - decline of the eruption - photo OVCV

In Cape Verde, the activity of Fogo is described as calm, despite a small increase on January 9, according to Sonia Silva, a volcanologist at the University of Cape Verde. Friday, gases and ash formed a dark brown plume top of 1200-1300 meters. On 10.01, the gas column is of low density and high of 200-300 meters and the lava fronts stagnants. The quantities of gases do not consider the eruption as completed. (Fogo news)

Shiveluch - 01/10/2015 - the cone is covered with ashes with small pyroclastic flows - photo Y.Demyanchuk

Shiveluch - 01/10/2015 - the cone is covered with ashes with small pyroclastic flows - photo Y.Demyanchuk

In the Kamchatka, the Klyuchevskoy presents a strombolian activity at the summit crater, a lava flow on its southern flank and phreatic activity on its slopes. The aviation code is orange (Olga Girina / kscnet)

After the large plume of 7 January, the Shiveluch's cone remains covered with ashes. Small pyroclastic flows are reported to the southeast and Békés river. A strong smell of sulfur is perceived by hunters in northern Shiveluch. The alert level remains at orange (Yuri Demyanchuk / Volkstat)

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Publié le par Bernard Duyck
Publié dans : #Actualités volcaniques
Shiveluch - 07/01/2015 - photo Y.Demyanchuk / Volkstat.ru

Shiveluch - 07/01/2015 - photo Y.Demyanchuk / Volkstat.ru

Shiveluch volcano / Kamchatka presented a violent explosion that January 7 to 12:40 local time. She was accompanied by a rising ash plume vertically 8-9000 meters, before moving on more than 100 km. NO do to the volcano, and pyroclastic flows, about 3 km, which marked the southeastern flank of the dome.
The plume is confirmed at this height by satellites (NOAA 2:15 UTC) and visual data.

The alert level emitted by the rest KVERT orange.

Sources:
- KVERT / VONA
- Volkstat.ru

 

The plume of Shiveluch seen on 01/07/2015 by the Aqua satellite - Doc. via Avcan

The plume of Shiveluch seen on 01/07/2015 by the Aqua satellite - Doc. via Avcan

The Colima volcanic center in the Mexican west field, consist of two volcanoes, the Nevado de Colima (4320 m) and the Colima Volcano / Fuego volcano (3850 m), as well as cinder cones.

The GVP reports that the new crater formed during Colima explosive activity in January 2013 is gradually filled by the growth of a lava dome.

Observations in January 2015 before the new explosions January 5 and 6, respectively photographed at 18h31 p.m. and 18h07.

Colima - the dome on 04/01/2015 - photo Hernando Rivera / Facebook

Colima - the dome on 04/01/2015 - photo Hernando Rivera / Facebook

 The plume of Colima 01.05.2015 / 6:31 p.m. - Photo Foto Tapiro

The plume of Colima 01.05.2015 / 6:31 p.m. - Photo Foto Tapiro

 Colima on 06.01.2015 / 6:07 p.m. - Photo Foto Tapiro

Colima on 06.01.2015 / 6:07 p.m. - Photo Foto Tapiro

Sources:

- Facebook / Popocatepetl

- Tapiro Fotografia

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Publié le par Bernard Duyck
Publié dans : #Actualités volcaniques

In an interview with the newspaper La Nacion, the volcanologist Raúl Mora Amador, from the Red Nacional Sismológica (RSN) of the Universidad de Costa Rica, said the dangerousness of Turrialba and the impossibility of predicting an eruption, especially if it is phreatic type ... remember the deadly eruption of Ontake in 2014.

After a major eruption of VEI 3 in 1866, it remained inactive for 130 years. In 1996, a slight increase in temperature fumaroles is detected and inflation ... more obvious factors as from the years 2000. In January 2010, heavy ash eruptions mark the volcano; they are repeated in 2012 and 2013.

 

Turrialba - phreatic eruption in March 2012 - Photo RSN / Raul Amador Mora

Turrialba - phreatic eruption in March 2012 - Photo RSN / Raul Amador Mora

In 2014, an eruption, considered the most important of the past 148 years beginning October 29th and lasts until December 8 (GVP).

In a few numbers:
- Falling of ash reach Puriscal, at 63 km. of the Turrialba
- The crater has widened considerably and gives way to the exit of bombs, some with a diameter of five feet, which fall at 700-800 meters from the main crater
- Between June 2010 and June 2014, a cumulative inflation of 28 mm is measured
- The gaseous emissions remain high, with an average daily flow of 1,000 to 3,000 tons
- The temperature of the fumaroles climb from 90 ° C in 2000 to around 800 ° C in 2014.


 

Turrialba - the plume of ash and gas on 1 November 2014 / 5:45 - Photo of Santa Cruz. - Lucre García López - Ovsicori

Turrialba - the plume of ash and gas on 1 November 2014 / 5:45 - Photo of Santa Cruz. - Lucre García López - Ovsicori

Southwest crater of Turrialba in November 2014 - photo Andre Quiros / fotos Aereas de Costa Rica

Southwest crater of Turrialba in November 2014 - photo Andre Quiros / fotos Aereas de Costa Rica

 Turrialba - 14 years of constant changes to the southwest crater - Doc. RSN / La Nacion 01.2015

Turrialba - 14 years of constant changes to the southwest crater - Doc. RSN / La Nacion 01.2015

All these changes in activity requires a permanently monitoring of the volcano.The volcanologist  Raúl Mora Amador said "it would be wise to establish a perimeter of risk of 5 km. around the crater." He mentions "the possibility this year of major eruptions that in 2014".
 

Turrialba - changes in vegetation between 28.09.2007 and 12.10.2011 - Doc. E.Duarte / Ovsicori-UNA / GVP

Turrialba - changes in vegetation between 28.09.2007 and 12.10.2011 - Doc. E.Duarte / Ovsicori-UNA / GVP

Turrialba - December 2014: the trees are covered with ash and / or burned by gas - photo Andre Quiros / fotos Aereas de Costa Rica

Turrialba - December 2014: the trees are covered with ash and / or burned by gas - photo Andre Quiros / fotos Aereas de Costa Rica

Ashes and persistently emitted gases have impacted the plantations and buildings around ... and operators continue to enter the area to work there every day!

Turrialba - a picture of Tanguy de Saint Cyr demonstrates the desolation of this flank of Turrialba - a click to enlarge - Adventure and Volcanoes travel in December 2014.

Turrialba - a picture of Tanguy de Saint Cyr demonstrates the desolation of this flank of Turrialba - a click to enlarge - Adventure and Volcanoes travel in December 2014.

Sources :

- La Nacion  - Vulcanólogos califican de ‘alto riesgo’ al Turrialba - link

- RSN - rapports mensuels - link

- Global Volcanism Program - Turrialba

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Publié le par Bernard Duyck
Publié dans : #Actualités volcaniques

After the intense but very short paroxysm of 28 December 2014, which began around 5:50 p.m. and ending at 21h, with fountains and lava flows towards east and northeast, and lapilli fallout on Milo, Fornazzo, San Alfio and Giarre, the volcano has recovered to emit large amounts of ash that January 2, 2015.

Etna - the climax of 12.28.2014 - photo Francesco Managlia / Twitter

Etna - the climax of 12.28.2014 - photo Francesco Managlia / Twitter

Etna - ash emissions 02/01/2015 - photo Turri Caggegi / iEtna

Etna - ash emissions 02/01/2015 - photo Turri Caggegi / iEtna

The strong wind slept the ash column on the southwest flank, and justified the closure of Catania airport.

For now, there is only a small increase (stable) of tremor.

Etna - left, curve of the tremor 01.02.2015 / 4:34 p.m. to - Doc. INGV Catania - right, forward dispersal areas of ash - doc.Ash Malta - a click to enlargeEtna - left, curve of the tremor 01.02.2015 / 4:34 p.m. to - Doc. INGV Catania - right, forward dispersal areas of ash - doc.Ash Malta - a click to enlarge

Etna - left, curve of the tremor 01.02.2015 / 4:34 p.m. to - Doc. INGV Catania - right, forward dispersal areas of ash - doc.Ash Malta - a click to enlarge

Etna 02/01/2015 - NSEC and the crack open on its side - photo Fabio Caltabiano / Etna Hike

Etna 02/01/2015 - NSEC and the crack open on its side - photo Fabio Caltabiano / Etna Hike

Etna - ash emissions 01.02.2015 / 11:10 - webcam Etnatrekking schienna

Etna - ash emissions 01.02.2015 / 11:10 - webcam Etnatrekking schienna

Etna - 01.02.2015 - photo Irina Kotova / Etnanativo

Etna - 01.02.2015 - photo Irina Kotova / Etnanativo

Etna Time Lapse, Volcanic Ash Emission / Turri Caggegi

Sources:

- INGV Catania

- iEtna / Turri Caggegi

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Publié le par Bernard Duyck
Publié dans : #Actualités volcaniques
Lava tube near Dray Sap Falls, Vietnam - photo VNE / CVN

Lava tube near Dray Sap Falls, Vietnam - photo VNE / CVN

A geological study, conducted in 2007 by scientists at the Vietnam Museum of Geology and Japanese counterparts, led to the discovery of a vast network of basaltic "volcanic caves" and many craters.

The first results were published on 26 December 2014 to raise funds for future research.

 

Vietnam - lava tunnel in Tay Nguyen (Highlands) - photo VNE / CVN

Vietnam - lava tunnel in Tay Nguyen (Highlands) - photo VNE / CVN

Vietnam - lava tunnel in Tay Nguyen (Highlands) - photo VNE / CVN

Vietnam - lava tunnel in Tay Nguyen (Highlands) - photo VNE / CVN

A dozen of these caves have their network extended of about 25 km., extending from a crater located in the village of Choar along the Serepok river to the Dray Sap falls.

Three caves were examined in detail ... The C7 cave is 1,066 meters long and is according Ngyen Van Thuan, head of the department of geology and mineralogy, the largest system of volcanic caves of Southeast Asia. Its walls are covered with lava stalactites.

A lava tunnel, located two kilometers of the falls is 15 meters wide. It is divided after 50 meters into two branches, each 300 meters long and 6 meters high.

Volcanic eruptions and lava flows responsible for their creation date of tens of millions of years. No trace of human presence was discovered, the network being in a primary forest, but it served as a shelter for animals.

 

Vietnam - lava tunnel in the province of Dak Nong - photo Tuoi Tre

Vietnam - lava tunnel in the province of Dak Nong - photo Tuoi Tre

Vietnam - lava stalactites and roots of plants - photo Tuoi Tre

Vietnam - lava stalactites and roots of plants - photo Tuoi Tre

This scientific and natural heritage is an opportunity for tourism development in the central Highlands (Tay Nguyen) and Dak Nong province. The geology department plans to classify it in volcanic Geopark, like the limestone Geopark in Ha Giang Province in northern Vietnam.

Sources:
- Vietnam breaking news
- Le Courrier du Vietnam

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Publié le par Bernard Duyck
Publié dans : #Actualités volcaniques

Other volcanic structures mark the hotspot Cordillera south of the Canary Islands:

Tropic seamount - 23 ° 53.09 'N / 20 ° 42.64' W - is a pseudo-circular base guyot with a cross-shaped top, its southern tip forming an angle of 90 ° and 60 respectively . Its area is 1,529 km². Its slopes are steep, with a maximum tilt of 62.5 °, and have important avalanche scars.

Tropic seamount - 3D bathymetric picture above - down, digital model of Tropic seamount on the basis of data Multihaz - Doc. Informs Científico-Técnico of Campaña oceanográfica DRAGO 0511 - Vasquez et al.
Tropic seamount - 3D bathymetric picture above - down, digital model of Tropic seamount on the basis of data Multihaz - Doc. Informs Científico-Técnico of Campaña oceanográfica DRAGO 0511 - Vasquez et al.

Tropic seamount - 3D bathymetric picture above - down, digital model of Tropic seamount on the basis of data Multihaz - Doc. Informs Científico-Técnico of Campaña oceanográfica DRAGO 0511 - Vasquez et al.

Iron and manganese crusts are abundant in metric dimensions in all sampled seamounts (Exarcan project). The internal structure is laminar to columnar, formed by layering slices of oxides and hydroxides of iron and manganese, occasionally colonized by corals or tube worms. The base of the crust is formed of volcanic rocks, lapilli and carbonates.

Tropic seamount : Fe-Mn crusts on bedrock, photo taken at a depth of 1,300 meters - Doc. Informs Científico-Técnico of Campaña oceanográfica DRAGO 0511 - Vasquez et al.

Tropic seamount : Fe-Mn crusts on bedrock, photo taken at a depth of 1,300 meters - Doc. Informs Científico-Técnico of Campaña oceanográfica DRAGO 0511 - Vasquez et al.

Tropic seamount - altered, and little vesicle basalt - with vacuoles containing pyroxene and calcite. - Doc. Informs Científico-Técnico of Campaña oceanográfica DRAGO 0511 - Vasquez et al.

Tropic seamount - altered, and little vesicle basalt - with vacuoles containing pyroxene and calcite. - Doc. Informs Científico-Técnico of Campaña oceanográfica DRAGO 0511 - Vasquez et al.

Tortuga is a submarine volcano -shaped sub-elliptical cone in form of a turtle with its head northeast. Located at coordinates 25 ° 51.39 'N / 20 ° 41.45' W, it is a small area compared to previous structure, 25.72 km², with slopes of 45 ° max, for a height of 700 meters . Debris avalanche deposits observed southeast.

Tortuga seamount - bathymetric 3D image - Doc. Informs Científico-Técnico of Campaña oceanográfica DRAGO 0511 - Vasquez et al.

Tortuga seamount - bathymetric 3D image - Doc. Informs Científico-Técnico of Campaña oceanográfica DRAGO 0511 - Vasquez et al.

Infinito Hill - 8.18 ° 26 'N / 21 ° 25.62' W - two cones form the hills aligned NE-SW, one conical, the other with a deep central depression 70 meters. This small structure of 5.13 km on 2.79 / 12.29 km², has slopes up to 49 °.
 

Infinito Hill - bathymetric 3D image - Doc. Informs Científico-Técnico of Campaña oceanográfica DRAGO 0511 - Vasquez et al.

Infinito Hill - bathymetric 3D image - Doc. Informs Científico-Técnico of Campaña oceanográfica DRAGO 0511 - Vasquez et al.


Other seamounts, from the largest to the smallest, are detailed in the original document.

 

Sources :

- Avcan noticias - El otro archipiélago sumergido de Canarias - link

- Informe Científico Técnico de la Campaña DRAGO 0511 - by Vázquez & al.- link

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Publié le par Bernard Duyck
Publié dans : #Actualités volcaniques

Everything concerning the submarine volcanism is little accessible to observation of ordinary volcanophiles, which should refer to oceanographic institutes for this exploration.

The underwater volcanic structures of the Canary Islands have recently been highlighted by the IEO during the submarine eruption off the Restingua / El Hierro.

3D bathymetry of the submarine volcano south of La Restingua / El Hierro - Doc. 7-8.02.2012 / IEO

3D bathymetry of the submarine volcano south of La Restingua / El Hierro - Doc. 7-8.02.2012 / IEO

Location of underwater volcanoes in southern Canaries - the dotted red line marks the "Cordillera oceánica punto caliente Canarias" - the area bounded in black is the area studied in the project Exarcan / campaign Drago 0511 - in Informe Científico-Técnico of Campaña oceanográfica DRAGO 0511 - Vasquez et al.

Location of underwater volcanoes in southern Canaries - the dotted red line marks the "Cordillera oceánica punto caliente Canarias" - the area bounded in black is the area studied in the project Exarcan / campaign Drago 0511 - in Informe Científico-Técnico of Campaña oceanográfica DRAGO 0511 - Vasquez et al.

The Exarcan project provides an access to bathymetries and samples on seamounts and peaks located in the southwest of the Canary Islands, Hijas, Bimbache (Hierro or Echo norte), Echo (or Endeavour) Paps, Drago and Tropic and to a lesser elevation field compound of Malpaso, Pelicar, Tortuga and Infinito.

Las Hijas saemounts, or " the girls" as a group of three submarine volcanoes, dated of 141 Ma, two of which are linked by a ridge-like structure. The largest, located at 27 ° 07 'N / 18 ° 37' W, measured at the base 10 km. on 8, and rises from -3.800 within -2,200 meters. Its neighbor to the northeast, has a basal diameter of 3 km and exceeds
the seabed of 400 meters. The third, mid-size, is located in the southwest of the largest and has a basal diameter of 4 km. and a height of 650 meters for a volume of 2 cubic km.

(Las Hijas seamounts, the next Canary island - by R.Rhim & al.1998)

Bimbache seamount -  3D bathymetry / in Informe Científico-Técnico of Campaña oceanográfica DRAGO 0511 - Vasquez et al.

Bimbache seamount - 3D bathymetry / in Informe Científico-Técnico of Campaña oceanográfica DRAGO 0511 - Vasquez et al.

The seamount Bimbache, also called Echo norte / Hierro - 26 ° 2.46'N / 18 ° 39.56'O - has a north-south oriented direction, 36.03 km on 13.62 km, with an area of 490. km², with a morphology of crest or ridge, characterized by a maximum difference in height. 2.700 meters and slope max 69 °. The dating of the Hierroridge is 133 Ma, much older than the island of El Hierro, from 1.1 to 0 Ma.

Echo sur seamount -  3D bathymetry / in Informe Científico-Técnico of Campaña oceanográfica DRAGO 0511 - Vasquez et al.

Echo sur seamount - 3D bathymetry / in Informe Científico-Técnico of Campaña oceanográfica DRAGO 0511 - Vasquez et al.

Echo sur seamount, also called Endeavour - 25 ° 22.34 'N / 19 ° 25.26' W - is a guyot sub-circular, in shape of a truncated cone, with an area of 1,406.5 km². Its slopes are 36 ° max.,  traversed by canyons. His plan top left more than a few small irregular cones, and its side is a scar of a possible debris avalanche.

"The Paps" seamount  consists of two very different sectors oriented roughly NW-SE. - bathymetry 3D / in Informe Científico-Técnico of Campaña oceanográfica DRAGO 0511 - Vasquez et al.

"The Paps" seamount consists of two very different sectors oriented roughly NW-SE. - bathymetry 3D / in Informe Científico-Técnico of Campaña oceanográfica DRAGO 0511 - Vasquez et al.

"The Paps" seamount - 25 ° 55.26 'N / 20 ° 21.61 W - consists of two very different sectors oriented roughly NW-SE.

Large of 38 to 17 km, for a total length of 90.8 km, its area is 2,150 km². .The Northern sector has a pronounced cone and a semi-flat top, secondary cones, debris avalanche scars and deposits on its western part.


To be continued ...

 

Sources :

- Avcan noticias – El otro archipielago sumergido de Canarias - link

- Informe Científico Técnico de la Campaña DRAGO 0511 - by Vázquez & al. .- link

- Las Hijas seamounts, the next Canary island ? – by R.Rhim & al. 1998 – link

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Publié le par Bernard Duyck
Publié dans : #Actualités volcaniques

A strategic project of the Spanish state, called EXARCAN / EXtension de la platAfoRma Continental de CANarias, to delineate the deep ocean areas where it can assert its rights of exploration and exploitation of subsoil resources, and of species living there, took place off the Canary Islands.

The campaign DRAGO 0511 has delivered information and scientific arguments to demonstrate that the submarines mountains and peaks located southwest of the Canary Islands, Hijas, Bimbache, Echo, Paps, Draco and Tropic, whose are known to exist and those that could be discovered, are a group of volcanic edifices common with buildings forming the islands of the archipelago, including those in the north, as the Banco de la Concepción.

Purpose of the area of the DRAGO 0511 campaign and various seamounts in the region: Bimbache, Paps, Echo, Tropic and other lower elevations, located in the Spanish EEZ - exclusive economic zone - and between 200 and 350 miles west of the Canary Island   / doc. in Informe Científico-Técnico de la Campaña Oceanográfica DRAGO 0511 - Ampliación de la Plataforma Continental de España al Oeste de las Islas Canarias – by Vázquez & al.

Purpose of the area of the DRAGO 0511 campaign and various seamounts in the region: Bimbache, Paps, Echo, Tropic and other lower elevations, located in the Spanish EEZ - exclusive economic zone - and between 200 and 350 miles west of the Canary Island / doc. in Informe Científico-Técnico de la Campaña Oceanográfica DRAGO 0511 - Ampliación de la Plataforma Continental de España al Oeste de las Islas Canarias – by Vázquez & al.

Work area of the 0511 campaign Drago southwest of the Canaries and the seamounts concerned - the red dotted line marks the "Cordillera oceánica de punto caliente Canarias" - in Informe Científico-Técnico of Campaña oceanográfica DRAGO 0511 - Vasquez et al.

Work area of the 0511 campaign Drago southwest of the Canaries and the seamounts concerned - the red dotted line marks the "Cordillera oceánica de punto caliente Canarias" - in Informe Científico-Técnico of Campaña oceanográfica DRAGO 0511 - Vasquez et al.

Scientific arguments, which allow to argue that the islands and seamounts of Canary form "a mountain range formed by volcanic activity in relation to the movements of the crust over a hot spot" are:
- Morphotectonics the structure of seamounts and
- Petrological, mineralogical and geochemical characteristics of effusive rocks forming the basis of seamounts.

 

Potential expansion area of Spain in the west of the Canary Islands between 200 and 350 nautical miles, under Article 76 of the Convention. This potential area of about 270,000 km2 - in Informe Científico-Técnico of Campaña oceanográfica DRAGO 0511 - Vasquez et al.

Potential expansion area of Spain in the west of the Canary Islands between 200 and 350 nautical miles, under Article 76 of the Convention. This potential area of about 270,000 km2 - in Informe Científico-Técnico of Campaña oceanográfica DRAGO 0511 - Vasquez et al.

The study of debris flows characterizing the pre-islands of hotspot will help to determine the deepest limit of the base of the continental slope and the natural extension of the border of the Canary Islands.

These data are expected to extend from 200 to 350 nautical miles to the west limits of the Spanish continental shelf.


To follow, some bathymetric views of underwater volcanoes of the Canaries.

 

Sources :

- Avcan noticias – El otro archipielago sumergido de Canarias - link

- Informe Científico Técnico de la Campaña DRAGO 0511 - by Dr. Juan Tomás Vázquez Garrido & al.- link

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