
It's now clear that the Holuhraun eruption is the greatest eruption in  Iceland in more than 230 years. This eruption some unique qualities when  compared to other Icelandic eruptions through the ages - but also on a  global scale.
Earlier this week scientists announced with  certainty that the new still-growing lava field north of the Vatnajökull  glacier, whom many want to be called Nornahraun (Witches's lavafield)  is larger than any other lava field since the Laki eruption in 1783-1784  - an eruption that had greater and more dire consequences than most  other eruptions in recorded history.
The lava field now covers 65 square kilometers and is still growing rapidly.
FIVE ERUPTIONS IN THE AREA
Volcanologist  Ármann Höskuldsson says that the eruption has kept a steady flow since  Oct. 6th and that it is impossible to predict when it will stop. As has  been stated before it is considered a given that another eruption will  soon begin in the area, considering the constant activity in the area.  It is now accepted that five eruptions have taken place in the area; two  sub-glacial ones, two smaller eruptions north of Dyngjujökull and then  the one that's currently in action.
"Although the lava flow has  reduced somewhat, it's still over 100 square meters per second, which  equals the Skjálfandi river during summer time. The flow was immense in  the beginning and was triple its current volume," states Ármann and adds  that the lava flow covered 20 square meters of land per second.
Ármann  agrees that the eruption is of a historic scale, and adds that it made  the history books in the first couple of weeks. "People tend to measure  volcanic eruptions by the cubic meter volume that emerges from the  volcano, but that's not a good scale of measurement. It's more about the  speed of things. You can talk about big volume volcanoes that took  decades or even centuries to accumulate. In this case we're getting an  incredible amount in an almost absurdly short amount of time.
GAS REMAINS A RISK
The gas pollution from the  caldera is currently the biggest concern, but in the beginning the force  of the eruption and the thermal uptake was so great that the gas was  launched high into the sky where no one noticed it. Later, as the force  of the eruption diminished, the gas has lain over the land and been a  nuisance. 
There's no end in sight to this problem, in fact  experts like Þorsteinn Jóhannsson at the Icelandic Environmental Agency  are predicting the exact opposite - that the winter weather will  escalate the problem, especially during the calm frost. "This problem  will only get worse with time and it is unlikely that the eruption will  grow in force and start kicking the gas to a higher altitude."
ICELAND AND THE WORLD
Even when the Holuhraun eruption is compared to eruptions all over the world the facts remain the same. Ármann states "We'd have to go way back, there's a huge eruption in the Canary Islands during the middle of the 18th century that's probably larger than this one. So even on a global scale the Holuhraun eruption is making history. Simply put it's the biggest lava eruption Mankind has seen since the 18th century."
FIREHEART
When asked  further about the eruption, Ármann notes that the eruption has already  lasted longer than both the Fimmvörðuháls and Eyjafjallajökull eruptions  combined. Ármann also adds that the magma that's coming up is unusually  hot; it's around 1200 C° which is around 200 C° greater than magma  coming from other known eruptions.
BÁRÐARBUNGA
But  that's not all. Ármann mentions that Icelandic geologists have poured  over every text and historic reference they know of, looking for  examples of a series of events anything like that which the nation has  been seeing in Bárðarbunga for the past couple of months.
"Bárðarbunga  is a huge concern and we've never seen anything like this. The large  amount of strong earthquakes, sometimes many a day, for days and weeks  on end. 
We've looked up every observed volcano, and this is  unprecedented. That makes the big picture much harder to see, because we  don't know what it all means," says Ármann who adds that the data that  has been collected from the Holuhraun eruption will take several years  to work through. No one can claim when that data gathering will end  though, as the Holuhraun eruption is surely only the beginning of a far  longer series of events in and around the Vatnajökull glacier.