March 22, 2010 Tsunami: Southwest Australia

All the tide gauges between Fremantle and Busselton recorded meteotsunamis […] For the 22 March event, all the tide gauge stations recorded relatively small initial crest heights (<0.2 m), followed by a relatively larger trough (0.4–0.5 m). Following the initial trough, observations show water level oscillations in the meteotsunami spectrum (see Pattiaratchi & Wijeratne, 2014) continued for the next several hours across the southern shore with wave heights between 0.10 and 0.30 m. (reference #14196)

The costliest natural disaster in Western Australian history, with a damage bill estimated at A$1.08 billion, occurred in the Perth region between 15:30 and 17:00 on Monday 22 March 2010. Most of the damage was due to hail associated with thunderstorms, with coastal stations recording wind (gust) speed of more than 30 ms-1. The thunderstorms were initiated to the north of Perth and progressed south along the coast (shore parallel). Rottnest and Garden Island meteorological stations recorded a pressure change of 4 hPa associated with the thunderstorms […] The thunderstorms created a meteotsunami with maximum wave heights of 0.48, 0.55, 0.40, and 0.45 m at Hillarys, Fremantle, Bunbury, and Busselton, respectively […] During the meteotsunami, oscillations with periods of 1–2 h were strongly excited (reference #11089)