Possible Micrometeorological Anomalies Induced by Volcanic Activity Recorded at Stromboli Island (Aeolian Archipelago, Italy)

Figure 5

Chronogram of the hourly air temperature ratios between Stromboli and Salina (Tr) measured during the study period (April 2011–April 2015), with indication of the 5th and 95th percentiles. Air temperature data from Stromboli have been no more available since February 2014. Vertical bands describing the volcanic activity state are drawn from literature data [9, 10] and the periodic bulletins emitted by INGV (http://www.ingv.it/it/). The lettered ((a)-(b)) horizontal red bands indicate intervals characterized by different variation styles in Pr signal (see main text for further details).