Earthquake activity followed by a change in activity on 2 – 4Hz band in Bárðarbunga volcano

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Photo of IMO geologists inside the Baugur crater on 4 March 2015. From the photo it appears that the vent discharging the lava is in the distance at the far end of the crater (area with white plume). According to the IMO caption, the photo was taken from the central part of Baugur crater as viewed looking along it to the N. The encrusted surface of the lava lake has collapsed, its remains seen as coarse, black rubble at the crater floor. On the crater floor, observers saw small vents sporadically discharging bluish gas. Part of the crater rim seen on the right side had broken, providing an outlet onto the lava field beyond. The resulting lava channel was about 50 m wide and 40 m deep. Courtesy of IMO (Ármann Höskuldsson; taken from IMO’s March-April 2015 report).
Photo of IMO geologists inside the Baugur crater on 4 March 2015. From the photo it appears that the vent discharging the lava is in the distance at the far end of the crater (area with white plume). According to the IMO caption, the photo was taken from the central part of Baugur crater as viewed looking along it to the N. The encrusted surface of the lava lake has collapsed, its remains seen as coarse, black rubble at the crater floor. On the crater floor, observers saw small vents sporadically discharging bluish gas. Part of the crater rim seen on the right side had broken, providing an outlet onto the lava field beyond. The resulting lava channel was about 50 m wide and 40 m deep. Courtesy of IMO (Ármann Höskuldsson; taken from IMO’s March-April 2015 report).

On 26-December-2015 two magnitude 3,3 earthquakes took place in Bárðarbunga volcano. This earthquake activity was followed by a change in activity on 2 – 4Hz band, it might signal a inflow of magma at depth into shallow parts of the crust. This is however this change in signal and it’s origin.

von.svd.26.12.2015.at.17.26.utcThe change in the SIL station can be seen between 25 and 26-December-2015 on the blue line. Copyright of this image belongs to Iceland Met Office.

The risk of eruption in Bárðarbunga volcano is increasing fast and Bárðarbunga volcano might erupt without warning at any time. Iceland Met Office holds a different view and that is there is no major risk of eruption in Bárðarbunga volcano at the moment, even if magma continues to flow into Bárðarbunga volcano.

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The earthquake activity in Bárðarbunga volcano. Copyright of this image belongs to Iceland Met Office.

The magnitude 3,3 earthquake in north-east part of Bárðarbunga volcano caldera had the depth of 0,1 km. The magnitude 3,3 earthquake in south-east part of the caldera had the depth of 2,5 km. At 08:20 UTC this morning a magnitude 1,0 took place in Bárðarbunga volcano, that earthquake had the dept of 20,3 km and that suggest the magma inflow might be more than current ideas and models suggest (this earthquake is on the edge of the volcano, not far from Tungnafellsjökull volcano). I don’t know what is going to happen next in Bárðarbunga volcano. Since nobody knows for sure what is going to happen next in Bárðarbunga volcano.

Update 1

The earthquake activity in Bárðarbunga volcano has now created a half-circle of earthquakes in the caldera. Over the past 24 hours there has been slight increase in activity in Bárðarbunga volcano after the magnitude 3,3 earthquakes. There has also been some odd harmonic tremor spikes around Bárðarbunga volcano, the problem is that at the moment there is bad weather taking place at this location in Vatnajökull glacier area. So this might just be wind. I have to wait until the weather gets better in order to see if anything changes.

 Map of the new lava from Bardarbunga, prepared on 21 January 2015. During January, the lava thickened, without extending much further. Numbers indicate the thickness (m) which is also color-coded (legend on right). Courtesy of Institute of Earth Sciences (IES), University of Iceland
Map of the new lava from Bardarbunga, prepared on 21 January 2015. During January, the lava thickened, without extending much further. Numbers indicate the thickness (m) which is also color-coded (legend on right). Courtesy of Institute of Earth Sciences (IES), University of Iceland

Article updated on 27-December-2015 at 17:56 UTC.

Iceland Met Office

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