PPRuNe Forums - View Single Post - Iceland volcano eruption risk level raised for aviation
Old 28th Aug 2014, 21:31
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mad_jock
 
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Another Volcano on yellow alert now.

Askja volcano
◾The dyke from Bárđarbunga volcano has entered Askja volcano. Not the fissure swarm, the volcano it self.
◾Askja volcano status has been elevated to Yellow.

Bárđarbunga volcano
◾Cauldrons in Vatnajökull glacier that is on top of Bárđarbunga volcano have not grown during the night.
◾The water seems to be flowing into Grímsvötn (Grímsfjall volcano) lake. It has risen close to 15 meters in the past few days.
◾Earthquake activity is high. Both in the main volcano were a magnitude 5,4 earthquake (EMSC magnitude, USGS magnitude) took place today (28-August-2014) at 08:13 UTC. The earthquake took place in the caldera rim as most of the large earthquakes have happened.
◾Over 1300 earthquakes happened yesterday in the north end of the dyke swarm.
◾Cracks have started to happen in the crust above the dyke. This means the dyke is getting wider and is higher up in the crust then suggested by earthquake activity. There are reports of small cauldrons in Dyngjujökull glacier in the area, in the place were the glacier is thinnest and ending.
◾Harmonic tremor remains high on all SIL stations around Bárđarbunga volcano.

The situation is extremely dynamic and is going to change fast in next 24 to 48 hours. I am now close to 80% sure that an eruption is going to take place in both Askja volcano and Bárđarbunga volcano, since minor eruptions have been taking place under the glacier already.
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