The most important source for volcanism in Oceanyka is the Eastern Australian Fault Line, which was created under mysterious circumstances just 700,000 years ago, precipitating one of the most violent cases of orogeny in geological history. Most of the Great DIviding Range is volcanically inactive, but the same cannot be said of Tasmania, whose peaks in the Tasmanian Highlands are filled with rivers or lava and are constantly besieged by micro-eruptions.
Earthquakes are a rare ocurrence, but when they do happen, they tend not to be very violent. Volcanic eruptions are also somewhat uncommon, throwing flaming debris everywhere and causing pyroclastic flows to ravage anything close to the foot of the volcano. These geological phenomena tend to happen in Tasmania and along the northern enf of the Great Dividing Range.