The eruption became stronger at Skjólkvíar on 12 May, with columns of steam attaining a height of . The eruption intensity then gradually reduced until it stopped on 20 May. The lava field then had an area of . Later that day a long fissure opened 1 km north of the main Hlídargígar crater. That night it contained 17 lava fountains, each in height. By the evening of the next day, 10–12 craters had formed, each throwing pieces of lava in the air. This row of craters was named Öldugígar. Gradually the number of active craters decreased, the most active of these built a cone higher than the level of the ridge. Lava flowed from its base until mid-June when the lava cut through the north crater wall. The larger cones produced more tephra, occasionally with lightning within the tephra cloud. By 5 July, the eruption had stopped.
the eruption became stronger at skjólkvíar on 12 may with columns of steam attaining a height of  the eruption intensity then gradually reduced until it stopped on 20 may the lava field then had an area of  later that day a long fissure opened 1 km north of the main hlídargígar crater that night it contained 17 lava fountains each in height by the evening of the next day 10–12 craters had formed each throwing pieces of lava in the air this row of craters was named öldugígar gradually the number of active craters decreased the most active of these built a cone higher than the level of the ridge lava flowed from its base until mid-june when the lava cut through the north crater wall the larger cones produced more tephra occasionally with lightning within the tephra cloud by 5 july the eruption had stopped