The name means “glacier” (or more properly here “ice cap“) of the Eyjafjöll. The word jökull, meaning glacier or ice cap, is a cognate with the Middle English word ikel surviving in the -icle of English icicle.

Gígjökull, Eyjafjallajökull's largest outlet glacier covered in volcanic ash
Gígjökull, Eyjafjallajökull’s largest outlet glacier covered in volcanic ash

Eyjafjallajökull (Icelandic: [ˈeiːjaˌfjatl̥aˌjœːkʏtl̥] (About this soundlisten); English: “Island Mountain Glacier”)[3] is one of the smaller ice caps of Iceland, north of Skógar and west of Mýrdalsjökull. The ice cap covers the caldera of a volcano with a summit elevation of 1,651 metres (5,417 ft). The volcano has erupted relatively frequently since the Last Glacial Period, most recently in 2010.[4][5]

Cross section through Eyjafjöll and Katla


The Eyjafjallajökull and the aurora, seen from the Skogasandur outwash plain, near the village of Skogar. Sébastien Giguère [CC BY (https://creativecommons.org/licenses/by/4.0)%5D
Eyjafjallajökull glacier, taken from the Iceland Ring Road, during a trip on 29 August 2009 Remy Osman [CC BY-SA (https://creativecommons.org/licenses/by-sa/3.0)%5D