strokkur geyser initial stage of eruption with blue bubble forming, fountain-type geyser in geothermal area in iceland, no people

active area blue boiling bubble churn cloud erupting eruption europe explode explosion fountain geology geothermal geyser geysir golden circle haukadalur hissing hot spring water iceland icelandic initial island landmark landscape natural nature people outdoor park pool rock stage steam stone stream strokkur tourism travel vapor vent view volcanic