Ka kammala wannan magana: Fashewar ta fitar da tephra kuma ta rushe dutsen cikin wani rami, wanda yanzu ya ƙunshi tafkin crater da ake kira Lake Lake. Fashewar ta fara ne da ginshiƙan Plinian mai ƙarfi, kuma ya ƙare da manyan hanyoyin pyroclastic. Matsakaicin Plinian ashfall da co<unk>ignimbrite ashfall sun rufe kusan Tekun Japan da arewacin Japan. An kira wannan ash ash "Baegdusan-Tomakomai ash" (B-Tm). Wataƙila ya faru ne a lokacin sanyi a ƙarshen shekara ta 946 A.Z. Wannan shi ne daya daga cikin manyan fashewa mafi girma a cikin shekaru 5000 da suka gabata, tare da fashewar Minoan na Thera, fashewar Hatepe na Lake Taupo (kimanin 180 AD),
1257 fashewar Dutsen Samalas kusa da Dutsen Rinjani, da kuma fashewar Dutsen Tambora na 1815.