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- Avaliação da suscetibilidade da ilha Terceira (Açores) a perigos vulcânicosPublication . Pacheco, José; Aguiar, S.; Pimentel, A.; Ferreira, T.; Gaspar, J. L.; Queiroz, G.; Goulart, C.ABSTRACT: Terceira Island has three active volcanic systems, including two central volcanoes and a fissure zone. Terceira’s eruptive history over the past 23,000 years has been marked by explosive eruptions of trachytic nature, with extrusion of trachytic lavas, as well as basaltic eruptions of low explosivity and hydromagmatic eruptions. All this diversity demonstrates that the island is exposed to a wide diversity of volcanic hazards. To assess the susceptibility of the island to these hazards its eruptive history was analyzed and used to produce simulations to determine the areas potentially affected by future eruptions.