Loughlin, Susan C.; Sparks, Robert Stephen John; Sparks, Steve; Brown, Sarah K.; Jenkins, Susanna F.; Vye-Brown, Charlotte (24 July 2015). Global Volcanic Hazards and Risk(PDF). Cambridge University Press. p. 604. ISBN978-1-107-11175-2. Archived from the original on August 19, 2016. Retrieved 30 August 2021.