The image above shows the process for sending tsunami warnings in Australia.
Yesterday, after a quake south of New Zealand a "marine warning" alert was issued for the south eastern Australia, including The Gardens, and, given the The Gardens house is only metres from the beach it did spark some degree of concern. It was originally reported as up to 7.8 on the Richter scale, but later this was downgraded to 5.9.
A marine warning is a "warning of potentially dangerous waves, strong ocean currents in the marine environment and the possibility of only some localised overflow onto the immediate foreshore."
I don't think "localised overflow" would have affected the house at all, but I did like the advice "to get out of the water and move away from the immediate water's edge!" The view from the balcony would have been enough for me!