Eruption in Holuhraun - update on 04/09/2014.

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.

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.
 

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.
 

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

Sources :

- IMO

- Institute of Earth Siences / University of Iceland

- Iceland review - link

- Nasa visible Earth - infrared views of Bardarbunga - link