Volcanic Eruptions in Iceland - History and Monitoring

Iceland sits directly on the Mid-Atlantic Ridge, where the North American and Eurasian tectonic plates diverge at ~2 cm/year. This geological position, combined with a deep mantle plume (the "Iceland hotspot"), gives Iceland over 30 active volcanic systems spanning 6 volcanic zones. On average, an eruption occurs somewhere in Iceland every 4–5 years. The most significant recent eruptions: the Fagradalsfjall/Reykjanes Peninsula series (2021 March–September, 2022 August, 2023 July, and continuing fissure eruptions in 2024 near Grindavík — five eruptions within 15 months); Bárðarbunga/Holuhraun (Aug 2014–Feb 2015, producing 1.4 km3 of lava — the largest Icelandic eruption since Laki 1783); Eyjafjallajökull (April–May 2010, ash cloud grounded 100,000+ flights across Europe for 6 days, affecting 10 million passengers); and Grímsvötn (May 2011, sub-glacial eruption under Vatnajökull). The Icelandic Met Office (Veðurstofa Íslands) operates a network of 70+ seismometers, GPS stations, and gas sensors across the country, providing early warning through the almannavarnir.is alert system. Travellers should register at safetravel.is for eruption alerts.