hot spring at iceland

active actively belt break called circle cloud clouds cooks develops digging digs earth effusive emergence eruption explosion explosively fog for fountain geysa geysir golden groundwater gullfoss haukadalur heat high hole hot iceland large laugarvath leader magma mantle opening orders outbreak pinvellir plume pours smell smoke source steam strokkur sulfur superplume system systems temperature volcanic volcanically volcanism volcano volcanos water zone