Date of sighting: January 3, 2016
Location of sighting: Canberra, Australia
News source: http://www.news.com.au/technology/science/space/was-this-ball-of-light-over-canberra-a-ufo/news-story/cf4cf198c09ecac93a0294f5bac89e51
This is not a natural phenomenon, but is the end point of a wormhole. The flash of the wormhole is the moment that a ship enters or exists the hole, which is also just a second before it closes. There is no transportation faster than that. Australia is known to have a lot of UFOs witnessed in its outback, so its no surprise that aliens are using wormhole technology to traverse the universe.
Scott C. Waring