( CNN ) -- A volcanic eruption in Iceland forced flight cancellations and the closure of airspace over the country 's four international airports , an official said Sunday . `` There are no international flights in or out of Iceland at this time , '' Keflavik International Airport spokeswoman Hjordis Gudmunsdottir said . Officials will reassess the situation at midnight Sunday ( 8 p.m. EDT ) , she added . There was `` no impact on European or transatlantic flights '' after the Grimsvotn volcano 's eruption , and none was expected on Sunday , Europe 's umbrella air traffic control association Eurocontrol said . Ash is expected to reach Scotland on Tuesday and could enter France and Spain on Thursday , Eurocontrol said . Last year , another Icelandic eruption , of the volcano Eyjafjallajokull , attracted worldwide attention after its ash cloud disrupted air travel across Europe . Weather patterns this weekend have been very different from the northerly winds that swept through the region after last year 's eruption , a spokeswoman for the official United Kingdom weather agency said . But she said the ash cloud 's movement is difficult to predict . Ash could reach the United Kingdom and northern continental Europe Wednesday , she said . The Grimsvotn volcano under the Vatnajokull glacier erupted Saturday , according to the Icelandic Meteorological Office . A dark cloud of smoke rose from the glacier , and scientists flew over the scene to evaluate the event , according to CNN affiliate TV2 Iceland . The last eruption of the volcano was in 2004 , TV2 Iceland reported . `` It is important for people to know that not all of Iceland is covered in ash , '' Gudmunsdottir said . Sitrun Kapitola , manager of the Islandia Hotel Nupar , which is close to Saturday 's eruption , said she could see a cloud of smoke over the mountains , and ash was falling around the hotel . Police were telling her and others that there was no need to evacuate and there was nothing to fear , Kapitola said . `` We see it very well , '' she said . Tourists at the hotel were excited to see the eruption , watching the events unfold while eating dinner , she said . `` It happens every 10 years , '' she said . `` It mostly produces water . '' Grimsvotn is Iceland 's most frequently active volcano . In 1783 , a 16.7-mile fissure system from the volcano produced the world 's largest known historical lava flow over a seven-month period , damaging crops and livestock , according to the Smithsonian National Museum of Natural History . A resulting famine resulted in the loss of one-fifth of Iceland 's population , according to the Smithsonian website . `` It 's nothing compared to the other one , '' she added , referring to last year 's dramatic eruption of the Eyjafjallajokull . CNN 's Andreena Narayan , David Wilkinson , Brian Walker , Marilia Brocchetto , Aliza Kassim and Michael Martinez contributed to this report .
NEW : The ash will reach Scotland on Tuesday , Europe 's umbrella air traffic control association says . NEW : Eurocontrol predicts the cloud could reach France and Spain on Thursday . Comment: There is no effect on European or transatlantic flights , Eurocontrol says .