Discriminating seismic events of the Llaima volcano (Chile) based on spectrogram cross-correlations - Curilem, Millaray; Mello, Rodrigo Fernandes de; Huenupan, Fernando; San Martin, Cesar; Franco, Luis; Hernández, Erasmo; Rios, Ricardo Araújo (Journal of Volcanology and Geothermal Research, 2018)