Summary of Abstract Submission

Abstract Submission No. IO50-10-0012PresentationOral


Charitha Pattiaratchi*1, Saratha Wijeratne1, Alireza Salehi1

1 The University of Western Australia, Australia


Meteotsunamis are water level oscillations with similar characteristics to tsunami waves generated by seismic activity but are generated by meteorological events, and in particular, moving pressure disturbances due to squalls, thunderstorms, frontal passages, and atmospheric gravity waves. Here, relatively small initial sea level perturbations, of the order of a few centimetres, can increase significantly through multi-resonant phenomena to create destructive events through the superposition of different factors. Reports of unusual coastal inundation events, even during fair weather conditions, have been reported by locals but have gone unexplained. The occurrence of meteotsunamis and different resonance phenomena leading to amplification of meteotsunamis are reviewed with particular emphasis in the Indian Ocean region with reported occurrences along the west coasts of India and Australia. A meteotsunami event due to the passage of a cold front contributed to the highest ever water level recorded at Fremantle (Western Australia) in 2012. Similarly an incident where a ship broke moorings and impacted on a railway bridge inside Fremantle Port was attributed to a meteotsunami generated by a cold front in 2014. Analysis of local water level records for 2014 revealed that there were > 30 events which could be classified as meteotsunamis with the majority occurring during the winter months associated with the passage of cold fronts. Although meteotsunamis are not catastrophic to the extent of major seismically induced basin-scale events, temporal and spatial occurrence of meteotsunamis are higher