The Holocene Impact Working Group (HIWG) has identified the location of at least eight impacts
into the worlds oceans in the Late Holocene. Each of these was capable of generating large tsunami
that should have left a geological footprint on adjacent shorelines. We have identified from shoreline
tsunami deposits five known impact events (Fig. 1), two of which are associated with impact craters
identified by the HIWG. The other three are associated with legends and historical descriptions. This
paper presents the chronology of tsunami events in New South Wales (NSW) and Western Australia
(WA)-on opposite coasts of Australia, and in the UK that are linked to impact events.