Bother amazing how the memory goes, this is the Strokkur geysir, the Geysir only blows after earthquake or volcanic activity...sorry
This is the Geysir, geyser Iceland. It errupts approximately every 8-10 minutes and I gather is one of the most regular geysers of its size any where in the world. Makes it great for photography. If you are there try also grabbing a photo of the bubble it creates just before it erupts in to the sky.