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When observers in October 2005 get a good view of the rim of Brimstone Pit, they note that the crater is shallower and narrower than it was last year. The crater is 20 meters shallower than last year, built up from the rocks being ejected out of the vent. Density flows are observed spilling over the rim of the crater. Video courtesy of Yoshihiko Tamura, JAMSTEC October 2005 Expedition.