After measurements taken this summer. It has now been learned that Askja lake is deeper then estimated from earlier measurements that where taken in the year 1963 by the Sigurjóni Rist. Volcanologist Ármann Höskuldsson has been working on this measurements during the summer months in Iceland. The raw data shows the Askja lake depth is 257 meters where it is deepest. But this is 40 meters deeper then earlier measurements did show.
It is not known why Askja lake is now deeper then earlier measurements did show. But it is possible that soil might have been sinking down, or something of that nature. But next summer scientists the raw data is going to be properly analyzed. By then scientists are going to know the exact depth of Askja lake. Along with how the bottom of the lake actually looks like.
Rúv News about this
Öskjuvatn dýpra en áður var talið (Rúv.is, Icelandic)
Note that the exact depth is not that important, but changes in depth are VERY interesting.