Heterogeneity of direct aftershock productivity in the focal zones of large earthquakes and other clustering features of seismicity in Italy during 2005 to 2016

Jiancang Zhuang, Institute of Statistical Mathematics, Tokyo, Japan, Yicun Guo, Earthquake Research Institute, University of Tokyo, Tokyo, Japan, Maura Murru, INGV National Institute of Geophysics and Volcanology, Rome, Italy, Giuseppe Falcone, Istituto Nazionale di Geofisica e Vulcanologia, Roma, Palermo, Italy and Elisa Tinti, Istituto Nazionale di Geofisica e Vulcanologia, Palermo, Italy