Gyroscope (IMAGE) Optica Caption Researchers built a prototype fiber optic gyroscope (pictured) for high resolution, real-time monitoring of ground rotations caused by earthquakes in an active volcanic area. The fibers are precisely wound around an aluminum spool to form a gyroscope based on the Sagnac effect. Credit Saverio Avino, CNR-INO Usage Restrictions None License Original 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.