Strokkur | Iceland’s Mighty Geyser

By Chris 73 / Wikimedia Commons, CC BY-SA 3.0, Link

Strokkur is a fountain geyser located in a geothermal area beside the Hvítá River in southwest Iceland. It is one of Iceland’s most famous geysers, erupting once every 6–10 minutes. Its usual height is 15–20 meters (49–66 ft), although it can sometimes erupt up to 40 metres (130 ft) high.
Strokkur was first mentioned in 1789, after an earthquake helped to unblock the conduit of the geyser. Its activity fluctuated throughout the 19th century. In 1815 its height was estimated to have been as much as 60 meters (200 ft). It continued to erupt until the turn of the 20th century, until another earthquake blocked the conduit again. In 1963, upon the advice of the Geysir Committee, locals cleaned out the blocked conduit through the bottom of the basin, and the geyser has been regularly erupting ever since.
info: wikipedia