description Sapphire Pool Geyser Overview
A deep-blue thermal pool and geyser in Yellowstone's Biscuit Basin, USA; after the 1959 Hebgen Lake earthquake, it temporarily erupted with unusual force before returning to a quiet state.
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Sapphire Pool Geyser ranks #144 of 586 in the Geyser ranking, behind State ProLine, ahead of AO Smith VAS-X1-50 Storage Water Heater.
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