In June 2020, the Icelandic Meteorological Office (IMO) issued a warning that an eruption might take place in the coming weeks or months, following scientists reporting high levels of sulfur dioxide, which is indicative of the presence of shallow magma. IMO warned that a glacial flood as a result of melting ice could trigger an eruption. According to scientists, the effects of a future eruption of Grímsvötn would not be as severe as the 2010 eruptions of Eyjafjallajökull, partly because Grímsvötn erupts a different igneous rock, basalt, as compared to the trachyandesite of the Eyjafjallajökull 2010 eruption.