Earthquake swarm (IMAGE) Optica Caption The fiber optic gyroscope captured small to medium earthquakes, including this swarm of earthquakes, in the volcanic area of Campi Flegrei in Naples, Italy. 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.