This graph shows the ice-surface lowering (subsidence) of the eastern Skaftá ice-cauldron in Vatnajökull ice cap in October 2015. Vertical displacement (m) was monitored by near real time presentation of data from a GPS station, mounted in the middle of the cauldron. The maximum elevation above sea level,
top left (hæð), refers to the zero value on the y-axis; while such value
top right
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