Editing Geyser (section)

=== Artificial geysers ===
In a number of places where there is [[geothermal activity]], wells have been drilled and fitted with impermeable casements that allow them to erupt like geysers. The vents of such geysers are artificial, but are tapped into natural hydrothermal systems. These so-called ''artificial geysers'', technically known as ''erupting geothermal wells'', are not true geysers. Little Old Faithful Geyser, in [[Calistoga, California]], is an example. The geyser erupts from the casing of a well drilled in the late 19th century, which opened up a dead geyser.<ref>{{cite book |title=A Guide to Geyser Gazing |first=John |last=Rinehart |year=1976 |publisher=HyperDynamicS |page=49}}</ref>

In the case of the Big Mine Run Geyser in [[Ashland, Pennsylvania]], the heat powering the geyser (which erupts from an abandoned mine vent) comes not from geothermal power, but from the long-simmering [[Centralia mine fire]].<ref>{{cite web |url=https://www.wnep.com/article/news/local/schuylkill-county/getting-to-the-bottom-of-this-gushing-geyser-in-schuylkill-county/523-eede19c1-008d-4987-bfe1-9ee658b41dab |title=Getting to the Bottom of This Gushing Geyser in Schuylkill County |publisher=WNEP-TV |date=17 June 2018 |first=Jessica |last=Albert |access-date=7 December 2021}}</ref>