HUGE LAVA EXPLOSIONS at night ! A New Huge Lava Eruption in Iceland. Geldingadalur Volcano Eruption 2021 May. More vents has joined, at the eruption site in Geldingadalur, forming a new huge vent. The new opening has an increased activity since last days and is bursting huge splashes of lava into the air, reaching hundreds of meters. The new crater has a geyser behaviour. It has moments when it is dormant, followed by instant huge explosions of lava. In the area, it is most likely that more fissures will open without notice with sudden lava flow. Huge gas acumulation makes the site a very dangerous place. The alarm sounds are made by gas detectors from the safety crews.