Strokkur Geyser erupts about every 4-8 minutes. The name, Strokkur, translates as ‘piston’, ‘cylinder’ or ‘The Churn’, and is the second most famous geyser in Iceland, the first being the Great Geysir, 50 metres away to the north. The temperature of the surrounding volcanic rock, approximately 200@ Celsius, heats this trapped water, causing it to expand and force its way up to the surface. It is a combination of water and steam that form the eruption.
Due to the reliability of its eruptions, Strokkur is a popular tourist attraction. It is surrounded by mud pools, fumaroles, algal deposits and other geysers. Both Strokkur and the Great Geysir form part of the Golden Circle, the most famous and well-travelled tourist route in Iceland.