Mysterious Scar-Like Structure in Australia Might Have Been Caused by a Rare Tornado

An unusual scar on the Nullarbor Plain, discovered through Google Earth, has been identified as the mark of a strong, previously unrecorded tornado. The discovery was made earlier this year by a caver scanning satellite images for geological features, and scientists have now detailed the findings in new research. The scar, which stretches 11 kilometres in length and up to 250 metres in width, is thought to have formed between 16–18 November 2022, marking a significant weather event in one of Australia's most isolated regions.

Tornado Phenomena in Australia

Research indicates that this tornado on the Nullarbor Plain reached at least F2 or F3 strength, with winds likely exceeding 200 kilometres per hour, as per a study published in the Journal of Southern Hemisphere Earth System Science. While tornadoes are widely associated with the United States, they also occur in Australia, albeit less frequently.

According to the study, the tornado left distinct “cycloidal marks” formed by powerful suction vortices, indicating the intensity and direction of its movement. Dr. Matej Lipar, one of the authors of the study, explained to phys.org that the tornado likely moved from west to east, propelled by a cold front that swept through the area.

Investigating the Tornado's Path

Located about 90 kilometres east-northeast of Forrest, a former railway settlement, the scar left by the tornado was uncovered by researchers and caving experts who study the Nullarbor's limestone landscape. The collaborative effort allowed them to narrow down the time frame of the event and confirm that it resulted from a significant tornado.

The scar has persisted for over 18 months, likely due to the region's sparse vegetation and slow growth in the dry environment, which means the land has not yet covered the erosion caused by the storm.

Preparing for Future Tornadoes

This rare instance of a tornado in the Nullarbor Plain sheds light on tornado patterns in Australia, especially in remote and unpopulated areas where storms may go unreported. The team behind the study noted the importance of satellite imagery in detecting and understanding tornadoes in such regions. Scientists can improve their predictions and enhance warnings for such destructive weather events by better understanding tornado activity in Australia's outback.