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Comparison of Porkchop Geyser in Sep 1984 (left) and Aug 1986 (right)

Detailed Description

Comparison of Porkchop Geyser in September 1984 (left) and August 1986 (right).  The Geyser entered a period of near-constant eruption in 1985, and the pool disappeared; it exploded on September 5, 1989.

Sources/Usage

Public Domain.

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