An overview of the eruption and seismic activity so far was published on IMO's website on 3 December. Insubstantial changes in the eruption occurred in December 2014. The lava field had increased to 82.8 km2. The lava ran in a closed channel to the east 15 km from the Baugur crater. M5+ quakes continued in the caldera; on December 19, vertical displacement at the caldera was measured at 56 metres. The eruption continued to emit intense sulphurous gasses which affected air quality throughout Iceland, depending on the weather conditions. On 25 December, a new earthquake sequence was recorded at the Geysir geothermal field 140 kilometres west of Bárðarbunga; the activity lasted for two days before fading out.