A new auroral phenomenon Dunes (IMAGE) University of Helsinki Caption A new auroral phenomenon discovered by Finnish researchers a year ago is probably caused by areas of increased oxygen atom density occurring in an atmospheric wave channel. The speculative explanation offered by the researchers gained support from a new study. Credit Graeme Whipps Usage Restrictions The image may be used with appropriate mention of the photographer (Graeme Whipps). License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.