Global Volcanism Program | Image GVP-05148
The Hekla edifice, seen here from the east, is elongated due to repeated eruptions along an ENE-WSW fissure that runs across the edifice. Numerous eruptions are recorded throughout the Holocene, both along this summit fissure system and from vents and fissures on the flanks.
Photo by Robert Citron, 1970 (Smithsonian Institution; courtesy of William Melson)
This image is made available under the Public Domain Dedication CC0 license, but proper attribution is appreciated.