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124 km distant 14 km altitude Alaska Volcano Observatory andesite ash fall ash plume ash to large AST on June August 18 eruption avalanches of hot basaltic-andesite stratocone beneath Crater Peak bombs C.A. Gardner C.A. Neal caldera Chakachatna River clasts closed for 20 coarse COOK INLET crater approximately 800 Crater Peak erupted CRATER PEAK MT crater rim erupted in 1953 erupted in historic eruption column ERUPTIONS OF 1992 fallout flank of Crater form debris flows Fragmental debris varying fumarole hot debris flowed June 26 revealed June 27 eruption km due west lahars lobate tongues magma meters number particle masks Peak again erupted Peak erupted explosively Photograph Credit pyroclastic flow deposits R.G. McGimsey Redoubt Volcano satellite vent perched seismicity seismometer September 16-17 eruption silicic-andesite dome complex snow to form south flank Spurr summit crater approximately summit lake T.P. Miller talus tephra cloud U.S. Geological Survey warm lake west of Anchorage