By 26 February 2010, the global positioning system (GPS) equipment used by the Iceland Meteorological Office at Þorvaldseyri farm in the Eyjafjöll area (around 15 kilometers south-east of the location of the recent eruption) Measurements made by using maps and measurement tools from Fasteignaskrá Íslandskort had shown 3 cm of displacement of the local crust in a southward direction, of which a 1-cm displacement had taken place within four days. (