Strokkur (Icelandic for "churn") is a geyser in the geothermic region beside the Hvítá River in Iceland. Strokkur is only a few meters away from Geysir. However, unlike Geysir which erupts infrequently and may be dormant for years at a time, Strokkur erupts very reliably every 5-10 minutes, hurling boiling water to heights of up to 20 metres (70ft) towards the sky.

Source: wikipedia.org