A heightened level of seismic activity has been recorded beneath the Bárðarbunga volcanic system in Vatnajökull National Park prompting officials to increase the aviation alert level. The Icelandic Meteorological Office raised the flight colour code to yellow shortly before 1am. The decision followed a significant earthquake swarm in the northern part of the caldera, RÚV reports. What’s… The post Hundreds of Tremors Shake Bárðarbunga Volcano System appeared first on Iceland Review.