Australia has been struck by an extremely rare M6.1 (m5.9 revised) earthquake.
It has been many years since Australia has been struck by any noteworthy earthquake activity. The last earthquake of noteworthy size was a M5.8 which struck in 2013 approximately 140 miles (220km) to the Southeast.
A quick review of the earthquake epicenter shows open outback desert, and mountains to the South.
Information on this earthquake comes from the Australian Geoscience Organization:
Date and Time
UTC: 20 May 2016 @ 18:14:02
Location Central Ranges, Northern Territory.
Coordinates: -25.474, 129.780
Depth: 9 km
Last updated: 21 May 2016 @ 04:26:59 (AEST)
Solution reviewed: No