== External links ==* "Geysers and How They Work" by Yellowstone National Park* Geyser Observation and Study Association (GOSA)* GeyserTimes.org* Geysers of Yellowstone: Online Videos and Descriptions* "About Geysers" by Alan Glennon* "Cold Water Geysers" by Alan Glennon* "Geysers", The UnMuseum* "Johnston's Archive Geyser Resources"* "The Geology of the Icelandic geysers" by Dr. Helgi Torfason, geologist* "Geysers and the Earth's Plumbing Systems" by Meg Streepey* National Geographic
* Strokkur v Islandiji.