Gordon Hervey Note WARNING here again!!! Bárðarbunga Caldera, - TopicsExpress



          

Gordon Hervey Note WARNING here again!!! Bárðarbunga Caldera, Iceland Update September 17 13:05 UTC Scientific Advisory Board Warning E-ly winds with the polluted area to the west and northwest of the eruption, marked by Hofsjökull glacier in the west and Skagafjörður in the north. Tomorrow pollution can be expected over the central highlands west and southwest of the eruption. Valid until midnight tomorrow, thursday. - Measurements show that the lava field in Holuhraun continues to expand. There are no signs of decreasing lava production. - The subsidence of the Bardarbunga caldera continues with the rate of about 50 cm over the last 24 hours. - Seismic activity has been rather intensive over the last 24 hours. Yesterday 7 earthquakes larger then M3,0 were detected in Bardarbunga. The biggest were M5,4 and M4,8 last night. Smaller earthquakes were detected in Dyngjujokull glacier and in north part of the dyke. - GPS monitoring show irregularity in in the crustal movements over the last few days. This sign could indicate that the magma movement under Bardarbunga is changing. No change has been detected in water measurement. Three scenarios are considered most likely: - Subsidence of the Bárðarbunga caldera stops and the eruption on Holuhraun declines gradually. - Large-scale subsidence of the caldera occurs, prolonging or strengthening the eruption on Holuhraun. In this situation, it is likely that the eruptive fissure would lengthen southwards under Dyngjujökull, resulting in a jökulhlaup and an ash-producing eruption. It is also possible that eruptive fissures could develop in another location under the glacier. - Large-scale subsidence of the caldera occurs, causing an eruption at the edge of the caldera. Such an eruption would melt large quantities of ice, leading to a major jökulhlaup, accompanied by ashfall. - Other scenarios cannot be excluded. Spread of lava at Holuhraun from TerraSAR-X: earthquake-report/2013/05/27/wordwide-volcano-activity-copahue-volcano-chile-alert-raised-to-red/
Posted on: Wed, 17 Sep 2014 17:43:32 +0000

Trending Topics



Recently Viewed Topics




© 2015