Skip to main content
U.S. flag

An official website of the United States government

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

By Yellowstone Volcano Observatory 1986 (approx.)
Comparison of Porkchop Geyser in September 1984 (left) and August 1986 (right)
Original Thumbnail Medium

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.