Ka cika wannan jumlar: Ƙungiyar Sunda tana da wasu daga cikin duwatsu masu aman wuta da suke da haɗari sosai a duniya. Fashewar Dutsen Tambora a 1815 a kan Sumbawa da
Fashewar Dutsen Samalas na 1257 a Lombok na daga cikin mafi girma a cikin shekaru dubu biyu da suka gabata, yana matsayi na 7 a kan ma'aunin VEI. Yankin subduction na Sunda Arc shima ya kasance ɗayan manyan abubuwan da aka sani na Cenozoic, VEI 8 Toba supereruption a Sumatra, wanda ya fitar da 2,800 km3 na magma c. 74,000 BP. Ruwa da ya fito daga wannan dutsen ya zama Tafkin Toba. Sautin da ya fi karfi a tarihin da aka rubuta ya faru ne a lokacin fashewar Krakatoa na 1883 kuma an ji shi. Daruruwan dubban mutane sun mutu saboda waɗannan fashewar da kuma ayyukan da ke faruwa a wasu duwatsu masu aman wuta, ciki har da Papandayan, Galunggung, Merapi, Kelud, Sinabung da Agung.