The latest excitement: a new fissure opened up yesterday lunchtime, hundreds of metres away from the original one. It's on a high plateau, close to the edge of the next valley (Meradalir), so there is now a lava stream pouring down the side of the valley and spreading out at the bottom. The old fissure is still active; I haven't seen anything yet to indicate whether the new fissure is affecting the flow rate from the old one.
The mbl.is webcam is still pointing at the original fissure, but the
RÚV one has been moved. Soon after the new eruption it was turned to point at the new fissure; overnight it was moved completely (or a new one installed) to the far side of the Meradalir valley, so there is now a clear view of the new fissure, the lava stream down the hillside, and the spreading lava on the valley bottom.
Iceland Monitor has an
article on the new fissure, with a video taken from a helicopter yesterday afternoon. This drone video also gives a good view:
EDIT 08/04/21
Clearly one new fissure was just not enough - shortly after midnight local time yesterday (7 April), a
third fissure opened up. It's on the same high ground as the second fissure, but on the Geldingadalir side, so its lava flows towards the first one. Unfortunately, this was the location that mbl.is chose for their webcam observing the original fissure, and so at 08:19 yesterday it went off-line, permanently - the first, and hopefully only, casualty of this eruption. Inevitably, someone's made a timelapse of its last hours:
On the up side, we can now be a bit more confident that something of twenty-first century technology is going to make it into the fossil record
On the webcam front, RÚV now have two, one looking over Geldingadalir to cover the first and third fissures, and one looking over Meradalir to cover the second fissure. Both are reassuringly high up and distant from the fissures. I think mbl.is have replaced their webcam, also somewhere safer but alas further from the action. I will try to sort out links for them all shortly.