Geysir -
Iceland - 2015
There are many hot springs in this very
geothermically
active area.
For hundreds of years the Great
Geysir here spouted several times a
day, lasting up to an hour and causing spouts of up to 60 metres in
height.
It was the first geyser described in a printed source and the
first known to modern Europeans.
Since 1916 it has mostly been dormant.
The English word "geyser" is derived from the Icelandic word "geysir"
which means gusher.
However nearby Stokkur
is
still active. It erupts every 8-10 minutes, 15 – 20
m high,
sometimes up to 40 m high.
Just before it spouts the water swirls into a giant eddy and then a
dome.