Campi Flegrei volcanic area (IMAGE) Optica Caption Map of the Campi Flegrei volcanic area with seismic stations of the monitoring network (blue triangles) and the fiber-optic gyroscope (orange circle) and some recorded seismic events (red circles). 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.