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originally posted by: LadyTrick
The iceland uni tweeted that bardarbunga crater GPS has been moved/lifted due to it almost being covered in snowfall. So nobody panic (like I did) when you see the huge rise on the graph.
Until recently, point measurements of the subsidence of the Bárðarbunga caldera were available in near real time as the IMO mounted a GPS station there, 12 September. This station has now subsided so much that it is out of sight of the neccessary relay station in Kverkfjöll and therefore no signal is received.
The subsidence of the Bárðarbunga caldera has also been observed by doing flights along a certain north-south section repeatedly. For convenience, the results are presented schematically, see below. The lower graph has a sixfold exaggeration of the vertical axis and on the upper one the difference in hight is multiplied by a factor of 120. The intention is not to make an image which resembles the volcano but to distinguish clearly and graphically between the results derived after each surveillance flight. Eight flight measurements are shown, from 5 September to 26 November 2014. The Institute of Earth Sciences makes these measurements and interprets the results. A comparison of the black line and the light blue one reveals that the subsidence has not only continued since September but also broadened, affecting a larger area.
Icelandic Met Office
The population of Chã das Caldeiras, totaling around 1,000 inhabitants, spent the night outside their homes due to the strong earthquakes, and started being evacuated when the eruption began. Like in 1995, some people initially refused to abandon their homes, but have gradually heeded the authorities' instructions.
Date/Time: 1/12/2014 12:52:30
Lat: 64.61721 Long: -17.42799
Magnitude: 5.23 ML
Depth: 4 km
Energy Released: 1055.3787 TTNT
Catalog Source: Icelandic Meteorological Office (preliminary list)
The activity peaked in first half of September, it has slowly decreased since then, but activity remains intense. The period of seismic unrest is one of the largest ever recorded in a volcano globally.........
......... the subsidence of Bardarbunga and the volcanic eruption on Holuhraun will continue for at least some months