“…For instance, the seven Astroni eruptions, which have followed each other in close succession within the same vent area , might have been triggered by mixing events that occurred shortly prior to the onset of activity (Tonarini et al, 2009). Should the fresh magma be hot and gas-rich, it might cause re-melting of a crystal mush, an event that possibly occurred in the past at Ischia (Brown et al, 2014) as well as in other volcanoes (e.g., Burgisser and Bergantz, 2011;Wiesmaier et al, 2012). There are several geophysical lines of evidence suggesting that the most intense, recent unrest event that occurred at Campi Flegrei (1982)(1983)(1984) might have been caused by the emplacement at shallow depth of a small volume of magma, on the order of 0.01 km 3 (e.g., De Siena et al, 2010;Trasatti et al, 2011;Amoruso et al, 2014).…”