Twenty papers on the study of tsunamis and respective tsunamigenic earthquakes are included in Volume II of the PAGEOPH topical issue ‘‘Tsunami Science: Ten Years after the 2004 Indian Ocean Tsunami’’. The papers presented in this second of two special volumes of Pure and Applied Geophysics re?ect the state of tsunami science during this time, including ?ve papers devoted to new ?ndings speci?cally in the Indian Ocean. Two papers compile results from global observations and eight papers cover Paci?c Ocean studies, focusing mainly on the 2011 Tohoku earthquake and tsunami. Remaining papers in this volume describe studies in the Atlantic Ocean and Mediterranean Sea and tsunami source studies. Overall, the volume not only addresses the pivotal 2004 Indian Ocean and 2011 Tohoku tsunamis, but also examines the tsunami hazard posed to other critical coasts in the world.