The University of Iceland has made it official.
As of Friday, October 17, the Bardarbunga fissure eruption was larger by volume of magma than the Hekla eruption of 1947, said a Tweet from the University of Iceland. It is now the largest Icelandic eruption since the Laki (Skaftáreldar) eruption of 1783-1784
The Holuhraun lava field now covers more than 59 sq km (22.78 sq miles), and around 0.83 km³ (.51 cu miles) by volume.
— Univ. of Iceland (@uni_iceland) October 17, 2014
This info came from a report by Jon Frimann.
Thanks to William Dugan for this link
“There have also been reports also the magma what’s now coming up is more gas rich,” says William.