Iceland: Volcanic activity ongoing in the Reykjanes Peninsula as of Dec. 19 /update 1

Eruptive activity is ongoing in the Reykjanes Peninsula near Grindavik as of Dec. 19. Observers from the Icelandic Meteorological Office reported that a volcanic eruption began around 4 km (2.5 miles) northeast of Grindavik at around 22:17 Dec. 18. Authorities have been closely monitoring the volcano in recent weeks after it started showing signs consistent with an imminent eruption. The eruption was preceded by an earthquake swarm that began around 21:00 Dec. 18 and is occurring along the magma dike that formed under the Fagradalsfjall Volcano system in late October. Lava is being discharged along a fissure around 3.5 km (2 miles) in length, with the southern end of the fissure located just east of Sundhnukur. The intensity of the eruption has decreased early Dec. 19; however, there is no indication of how long the eruptive episode may last and the fissure may continue to grow towards Grindavik.

Local authorities have declared an emergency phase due to the eruption and police are advising people to avoid the area. The eruption has rendered Grindavikurvegur road impassable. Around 4,000 people were evacuated from Grindavik in mid-November due to the threat of a possible eruption. Several roads to and from Grindavik and other areas in the vicinity of the volcano remain closed. The Blue Lagoon hotel and spa partially reopened Dec. 17 having been closed as a precaution since Nov. 9, but has been fully closed again Dec. 18 following the eruption. Flights are operational at Keflavik International Airport (KEF) as of Dec. 19; however, significant delays are occurring following the eruption.

Officials may expand evacuation orders and road closures at short notice. Further volcanic activity is likely in the coming days. Ongoing eruptive activity at the volcano could prompt transport disruptions in the surrounding area. Lava flows could block highways and damage structures. Ashfall may reduce visibility and cause hazardous driving conditions and could pose an increased threat to air traffic; further flight disruptions are possible at Keflavik International Airport (KEF) if sustained eruptive activity continues and winds direct volcanic material in the general direction of the airport.