The name of Mt. Krafla was
extended over the high temperature area after the geothermal power
station was built in 1974. The colourful mountain Leirhnjukur is
situated at the southern end of the 40 km long and 15 km wide eruptive
area, Gjastykki, which erupted 9 times between 1975 and 1984. The
average depth of the boreholes feeding the power station is 2000 m.
They are lined with pipes down to 700 - 1000 m to prevent collapsing.
The steam pressure from the
separators in the grey building equals 7,7 bars when it is pipelined
to the generators in the red building. The output is about
70 MW and
the power station is directly connected to the national grid. At the onset of the so-called
Myvatn fires 1724 -1729 the explosion crater Viti (Hell) was created.
Because of the latest Myvatn fires,
1975 - 1984, and the consequent plate tectonics the
boreholes caved in and prevented the operation of the power
station until 1979. East of it and south of Mt. Krafla is
the obsidian ridge, Hrafntinnuhryggur. The Krafla- and
Leirhnjukur areas offer various hiking possibilities through
unique and unbelievable landscapes.