A 3.9 magnitude earthquake struck Appin, on Tharawal land 70km South-West of Sydney, at 1:13am this morning.
The quake only lasted 0.87 seconds, but could be felt by people up to 51km away.
An earthquake with a reported 7.9 magnitude hit New Zealand's South Island around 12:02AM local time this morning. Devastating aftershocks and tsunamis quickly followed. It's possible that more aftershocks are to come.
Just a few months after central Italy was battered by a magnitude 6.2 earthquake, the region has been struck again, and harder.
A 7.1 magnitude earthquake hit 130 kilometres north-east of Te Araroa in the early hours of this morning. It was felt from Northland to Wellington in the North Island and in the top of the South Island. A 30 centimetre tsunami was triggered by the quake.
There were a series of aftershocks after the initial quake at 2.37am AEST. The first was a 6.2 magnitude shock at 3.14 AEST, and by 5.10am AEST 57 aftershocks had occurred.
Video: Yesterday, a massive 6.1 magnitude earthquake rocked central Italy. It was followed by nearly 200 aftershocks, devastating whole towns and burying residents under rubble. Over 4000 rescuers have been dispatched and the death toll has jumped to 247, the BBC reports.
It was a day for quake, rattle, and roll on the US West Coast when small earthquakes hit both Los Angeles and the Pacific Northwest on Tuesday. While the pair shared common characteristics, the stories behind why they happened reveal dramatically different Worst Case Scenarios for future earthquakes.