On 19 March 2021, an effusive eruption started at approximately 8:45 PM local time in Geldingadalir. A fissure vent, 600 meter long, began ejecting lava, which soon covered an area of approximately 1 square kilometer. The main crater has begun to form and rise. The site became a major attraction for the Icelandic people doing the long hike to view the spectacle. The eruption during the month of May was so intense that the glow from the hot lava spewing out of the Fagradalsfjall volcano was seen from the outskirts of Iceland's capital, Reykjavík, 32 kilometers away.