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Earth of fire

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

Publié par Bernard Duyck
Publié dans : #Actualités volcaniques
 Holuhraun - lava fountains from Reykjavik Helicopters

Holuhraun - lava fountains from Reykjavik Helicopters

 The plume and ashes of the eruption Holuhraun - photo Geir Ólafsson / Iceland Review

The plume and ashes of the eruption Holuhraun - photo Geir Ólafsson / Iceland Review

The intensity of the ongoing eruption continues unabated ... the lava flow towards the ENE grew substantially and the covered area is approximately 10.8 square kilometers. No evidence of subglacial eruption, or changing in discharge and conductivity in the Jökulsá River.

The low-frequency tremor, measured yesterday stopped around 21:30 to resumeon 04.09  morning in a minor key. The source of the tremor was not identified with certainty; one possible explanation is according to scientists, an interaction between magma and water.

Extension of the lava field in Holuhraun with dates - map IMO

Extension of the lava field in Holuhraun with dates - map IMO

The fissure in Holuhraun - a plane in down center for scale - photo Ragnar Sigurdsson / Arctic Images

The fissure in Holuhraun - a plane in down center for scale - photo Ragnar Sigurdsson / Arctic Images

Cracks in Holuhraun - photo RUV - pic.twitter.com/y0qsI5hjSn 02.09.2014

Cracks in Holuhraun - photo RUV - pic.twitter.com/y0qsI5hjSn 02.09.2014

  2014.09.03 - Crevasse near the site of eruption - photo Lara Omarsdottir / via Twitter

2014.09.03 - Crevasse near the site of eruption - photo Lara Omarsdottir / via Twitter

Earthquakes are still detected in the northern part of the dyke, in the eruption site, and under the Dyngjujökull. Four tremors above magnitude 4 were detected in the caldera of Bárðarbunga, the largest M4,8 at 3:09 tonight.
 

Location and magnitude of earthquakes in northern Vatrnajökull the 04.09.2014 / 15:05 - Doc. IMO
Location and magnitude of earthquakes in northern Vatrnajökull the 04.09.2014 / 15:05 - Doc. IMO

Location and magnitude of earthquakes in northern Vatrnajökull the 04.09.2014 / 15:05 - Doc. IMO

Emissions of sulfur dioxide continue and, due to low wind conditions, are concentrated near the site of eruption, reaching dangerous levels for health

Regarding the graben that forms south of the eruption, cracks identified by the radar, and some well visible by aerial observation, show horizontal and vertical above the dyke travel.

 

Radar images of the graben (rift) - one click to enlarge - doc. University of IcelandRadar images of the graben (rift) - one click to enlarge - doc. University of Iceland

Radar images of the graben (rift) - one click to enlarge - doc. University of Iceland

Position and movement of GPS stations - the distance in the opposite direction on each  side of the dyke, shows the opening of the rift in the ice Dyngjujölull - doc IES

Position and movement of GPS stations - the distance in the opposite direction on each side of the dyke, shows the opening of the rift in the ice Dyngjujölull - doc IES

A picture taken at night in infrared details the front washing and crack, warmer zones
 

Top, high-resolution infrared Holuhraun composite - bottom Holuhraun in infrared at night - Doc. NASA MODIS Aqua
Top, high-resolution infrared Holuhraun composite - bottom Holuhraun in infrared at night - Doc. NASA MODIS Aqua

Top, high-resolution infrared Holuhraun composite - bottom Holuhraun in infrared at night - Doc. NASA MODIS Aqua

As a bonus, because we will never do the same ... "JUMP INTO HELL" - a photo of Iurie Belegurschi Photography

As a bonus, because we will never do the same ... "JUMP INTO HELL" - a photo of Iurie Belegurschi Photography

Sources :

- IMO

- Institute of Earth Siences / University of Iceland

- Iceland review - link

- Nasa visible Earth - infrared views of Bardarbunga - link

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