Solar Coronal Loops (image) University of Sheffield Share Print E-Mail Caption Magnetic coronal loops form a solar harmonica with temperature over a million degrees. The average length of these loops are a few 100,000 km. Credit Image credit TRACE Usage Restrictions None Share Print E-Mail 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.