Emva kwenyikima yenyanga ephelileyo kunye nokudubula kwentaba-mlilo iPopocatépetl eMexico, abantu abaninzi bazibuza ukuba ingaba ubudlelwane phakathi kwezi zimbini. Iingcali ngelo xesha zaziphika. Esinye sezizathu eziphambili yayingumgama owawukho phakathi kwenyikima kunye nentaba-mlilo uqobo. Amakhulu eekhilomitha athi i-priori, kubonakala ngathi ayibonisi ubudlelwane, ke iyaliwe. Ngaphandle koku, usenomdla, kwaye ngoku ingcali entsha ithetha ngobukho bokuba kunjalo.
Sithetha ngayo UCarlos Demetrio Escobar, ugqirha wentaba-mlilo waseSalvador ophikisa le hypothesis yangaphambili. Ngokusekwe kuqwalaselo lwabo, isixa esikhulu samandla esiveliswa yinyikima siyabonakala. Ukuthathela ingqalelo le nyikima yomeleleyo, inokubangela nentaba-mlilo esebenzayo ukuba ifumane amandla angaphezulu. Ayisiyiyo loo nto kuphela, watsho nokuba inyikima esikufutshane nentaba-mlilo inokuba sisalathiso somsebenzi wentaba-mlilo esebenzayo.
Iintaba-mlilo kunye neenyikima, ubudlelwane bazo
Ukuqhuma kwentaba-mlilo yinxalenye yesiphumo sokwanda kwamaqondo obushushu kwimagma. IMagma, efumaneka ngaphakathi kwengubo yoMhlaba, inokufudunyezwa kukushukuma kwenyikima. UCarlos Demetrio, uyacacisa ukuba le iya kuba sesinye sezizathu zokuba ingabangela ukudubula emva kweenyikima. Isangqa semagnethi, indawo apho ilitye elinyibilikileyo elivela kwi-volcano esebenzayo ingathatha amandla angaphezulu. Oku kuya kuguqulela kuxinzelelo olwandileyo, oluya kuthi ekugqibeleni luphakamise amathuba aphezulu okuqhuma.
Ngokwengcali, i-volcano esebenzayo yeyinye esinokuthi siyicinge ukuba inamandla afunekayo okubonisa uqhushumbo, okanye oku sele kwenzekile ngaphambili kwiminyaka engama-500 edlulileyo. Oko kuya kunyusa inani le "volcanoes ezisebenzayo."
U-Escobar, into awayefuna ukuyenza icace ngalo lonke ixesha yileya Ungathethi ngeenyikima kunye neentaba-mlilo, kungxamile kakhulu. Ngaphezu kwako konke, kuthathelwa ingqalelo ukuba "morphology" yazo zombini ziyafana. Omnye unokutyisa okanye acaphukise omnye.