On 2 January 1996, Akademia Nauk erupted. Eruptive pulses from the bottom of Karymsky Lake ejected steam and ash columns in the air every five to six hours for the 18 hours that followed, releasing approximately 30 to 40 million tons of highly acidic
pyroclastic material in the air, tsunamis up to 20 meters (65 feet) also occurred. Much of the material, which was rich in sodium, sulfates, calcium, and magnesium, collapsed back into Lake Karymsky, changing its
pH from 7.5 to 3.2 (moderately acidic). ==References==