Proud added that the only other volcanic plume that might have reached the mesosphere might have been released in the eruption in 1883 of Krakatau, a small volcanic island in Indonesia.

普劳德补充说，唯一可能到达中间层的另一股火山柱可能是在1883年印度尼西亚的一个小火山岛喀拉喀托火山爆发时释放出来的。