It is one of several crater lakes in the area, known as Iceland's Western Volcanic Zone, which includes the Reykjanes peninsula and the Langjökull Glacier, created as the land moved over a localized hotspot, but it is the one that has the most visually recognizable caldera still intact.
NOx conc, COconc, HCconc, NMHCconc = concentraciones medias con corrección de fondo a lo largo del ciclo, obtenidas mediante integración (obligatorio para NOx y HC) o medición con bolsas, en ppmWikiMatrix WikiMatrix