Bignami, C., Valerio, E., Carminati, E., Doglioni, C., Petricca, P., Tizzani, P. and Lanari, R. (2020) “Are normal fault earthquakes due to elastic rebound or gravitational collapse?”, Annals of Geophysics, 63(2), p. SE213. doi: 10.4401/ag-8455.