A volcano in Iceland erupted Saturday evening for the fourth time in three months, sending orange jets of lava into the night sky.Iceland’s Meteorological Office said the eruption opened a fissure in the earth about 3 kilometers (almost 2 miles) long between Stóra-Skógfell and Hagafell mountains on the Reykjanes Peninsula.The Met Office had warned for weeks that magma — semi-molten rock — was accumulating under the ground, making an eruption likely.Hundreds of people were evacuated from the Blue Lagoon thermal spa, one of Iceland’s top tourist attractions, when the eruption…