Holuhraun volcan eruption

In the above video you'll see the massive size of the eruption of the rift and the resulting lava flow forming a river of magma. I've never seen anything like this before.

The ongoing volcanic eruption in Holuhraun has already become the largest lava eruption in Iceland since the 19th century, according to volcanologist Ármann Höskuldsson. More lava has been emitted than in the largest lava eruption of the 20th century, Krafla in 1984. Lava is made up of crystals, volcanic glass, and bubbles (volcanic gases).

In this video you'll see how low the viscosity of the lava coming from this eruption. It is clearly molten and moving below the surface but the "crust" of the flow cools enough to harden. It is as if to make it seem as a slow, relentless wall of rock is coming toward you.