Mezue nkebi ahịrịokwu a: Nsogbu ọzọ a na-enwe n'usoro ihe omume a bụ ọgba aghara a na-enwe n'obodo ndị dị nso n'ebe ọtụtụ ugwu na-agbọpụta ọkụ dị. Ihe
agha obodo na Guatemala metụtara ọmụmụ nke Volcán Santa María ruo mgbe a kpọrọ nkwụsịtụ na 1996, ebe agha obodo na-aga n'ihu na Democratic Republic of Congo egbochiwo ọmụmụ nke ugwu mgbawa Nyiragongo. N'ozuzu, ụkọ ihe ndị e ji amụ banyere ugwu mgbawa emewo ka e nwee usoro ihe omume ndị na-asọrịta mpi maka ego a kpaara ókè.