The map below shows the location of the eruption based on the latest information. The outlet is to the east of Fagradalsfjall, at Geldingadalsgos behind Geldingadalur.
The weather forecast for the near future assumes quite strong winds and rainfall, which will reduce the impact of possible pollutants from the volcano. The dust spread pattern can be observed HERE.
We now know that Geldingadalsgos is a crevice eruption approximately 500 to 700 meters long. About 800 years have passed since the last eruption in the Krísuvík volcanic system on the Reykjanes peninsula, and the current eruption does not pose a direct threat to people or infrastructure in the area.
Southwest Icelanders are advised not to open their windows due to the risk of higher levels of sulfur dioxide, which can cause a slight burning sensation in the eyes and throat. Wind can also carry this gas to Reykjavik.
Gas contamination can be reported on the form available HERE.
Air traffic at Keflavík International Airport has not been halted and is unlikely to happen. Fissure eruptions such as Geldingadalsgos do not emit much ash, and the location of the rift is far enough away from the airport and its associated infrastructure that there is no need to cancel flights.
Consequently, even those living in the vicinity of the eruption are unlikely to be in great danger.