<DIV>Enclosed is a photo of Strokkur I found on the Internet.</DIV> <DIV> </DIV> <DIV>It shows Strokkur's characteristic blue bubble, just as it is destroyed by the gunshot spike from beneath.  In the 60 seconds prior to an eruption, the pool rises and falls a several times without being destroyed by an initiated eruption, resulting in a perfectly clear blue dome of water.</DIV> <DIV> </DIV> <DIV>The following link is to the site where I found the picture, and includes someone's photos of their trip to Iceland.  Starting on image #57 there are two sequences of Strokkur eruptions.  The first includes the enclosed picture, and is of one of the smaller to moderate eruptions.  The second series is of a very big one.  #61 is just after the destruction of the bubble (blue is still barely visible) by a powerful spike, which becomes a "superburst" of spikes through spikes in the images that follow.  Note that in the second eruption sequence, the "bubble" (not pictured) was probably much larger, as evidenced by the bigger out-rushing wave in the crater.</DIV> <DIV> </DIV> <DIV>The rope wasn't there in 1997, and you could stand in the crater.  The rope still places you awfully close...</DIV> <DIV> </DIV> <DIV>Strokkur does something like this every 5 minutes!</DIV> <DIV> </DIV> <DIV>His other pictures are very nice, too, with some thermal features included, enjoy.</DIV> <DIV> </DIV> <DIV><A href="http://rogitrix.com/Photography/icelandPreview/pages/040413-0499-Iceland.htm">http://rogitrix.com/Photography/icelandPreview/pages/040413-0499-Iceland.htm</A></DIV>