The "Mount Pinatubo" of Iceland, Then and RIGHT NOW!
Bardarbunga volcano in Iceland goes up like Mount Pinatubo. This eruption is rated a 6 out of 7 on the Volcanic Explosivity Index. In other words, it's not the Apocalypse, but if you were anywhere near it you certainly thought the end was near, right before the end came... for you. It is putting out an amazing amount of ash and lava. Pyroclastic flows are a wave front of superheated gas and rock, traveling for miles at super-speed, destroying everything in it's path. Although lava in Iceland is more-or-less like lava in Hawaii, the Bardarbunga volcano has been VERY explosive in the past and over it's life, it has put out more lava than any other volcano.    
This Year in Wikipedia
Year 1477, Wikipedia.
- Bardarbunga - Wikipedia (2014). Retrieved on 21 November 2014.
- Volcanic explosivity index - Wikipedia (2014). Retrieved on 21 November 2014.
- Iceland: Geology - Wikipedia (2014). Retrieved on 26 November 2014.
- Effusive eruption - Wikipedia (2014). Retrieved on 26 November 2014.
- 2014 eruption of Bardarbunga - Wikipedia (2014). Retrieved on 26 November 2014.
- Eruption update Bardarbunga volcano, Iceland: latest information & news. VolcanoDiscovery.com (2014). Retrieved on 26 November 2014. “Seismic activity in the dyke intrusion thought to feed the Holuhraun eruption remains low. As long as the Holuhraun fissure eruption remains active it releases the pressure below the Bardarbunga caldera. If the Baugur crater would however get 'obstructed' whilst magma continues to well up, the pressure is likely to increase as magma searches for another eruption location. Regardless of what happens next, this eruption is record-breaking as it already emitted an impressive volume of more than 1 cubic kilometer of lava. This makes it the second largest effusive eruption in Iceland since the 18th century.”
- Holthaus, Eric (2014). Iceland volcano Bardarbunga: How bad would an eruption be?. Slate.com. Retrieved on 26 November 2014. “Update, Aug. 20, 2014: Iceland's National Crisis Coordination Center has been activated, and a large uninhabited area surrounding the volcano has been evacuated. The Icelandic Met Office reports that about 1,000 small earthquakes occurred near the volcano on Tuesday. Also on Tuesday, Iceland's Civil Protection raised the nation's threat level from Uncertainty Phase to Alert Phase.”