Mezue ahịrịokwu na-esonụ: Mkpọtụ ahụ wụpụrụ ihe dị ka tephra ma mee ka ugwu ahụ daa ghọọ ọgba, nke nwere ọdọ mmiri nke a kpọrọ Ọdọ Mmiri Eluigwe ugbu a. Mgbawa ahụ malitere site na ogidi Plinian siri ike, wee kwụsị site na nnukwu mmiri pyroclastic. Nkezi nke Plinian ashfall na co<unk>ignimbrite ashfall kpuchiri ihe dị ka Oké Osimiri Japan na ugwu Japan. A na-akpọ akwa ash a "Baegdusan-Tomakomai ash" (B-Tm). O yikarịrị ka o mere n'oge oyi ná ngwụsị afọ 946 O.A. Nke a bụ otu n'ime mgbawa kachasị ukwuu na nke kachasị ike n'ime afọ 5000 gara aga, yana mgbawa Minoan nke Thera, mgbawa Hatepe nke Ọdọ Mmiri Taupo (ihe dị ka 180 AD),
Mgbawa nke Ugwu Samalas nke 1257 n'akụkụ Ugwu Rinjani, na mgbawa nke Ugwu Tambora nke 1815.