Old Faithful Geyser of California

1299 Tubbs Lane
Calistoga, CA 94515


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The Old Faithful Geyser of California is one of three geysers in the world with the designation "old faithful." These are the geysers that perform at regular intervals. A geyser exists only where conditions are right. These conditions include a natural deep subterranean supply of water, a source of heat and a series of fissures, fractures and cavities that provide a path to the surface of the earth. Surrounding rock formations must be strong enough to maintain continual onslaughts of the intense pressure of steam and water explosions.

Water for the Old Faithful Geyser of California comes from an underground river. When this water flows over the hot molten magma deep in the earth, it boils and expands and is collected in large cavities. Under tremendous pressure from the heat, and assisted by a constriction of the passage upward, the superheated water is forced through the fissures and fractures and erupts with an outpouring of steam followed by a fulmination of hot dancing water. 

Under normal conditions, the water, the heat and the underground structure all remain constant and for this reason Old Faithful erupts regularly. Conditions which cause deviations from the normal pattern seem to relate to earthquakes. The Old Faithful Geyser of California is proving itself a predictor of quakes.

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