Four years of soil strain monitoring on Etna Volcano Mount by means of a Three-axial Fiber Bragg Grating Sensor
- 1Università di Pisa, Dipartimento di Fisica, Pisa Italy
- 2INFN - Sezione Pisa, Pisa, Italy
- 3Marwan Technology srl, Pisa, Italy
- 4Osservatorio Etneo, INGV - Sezione di Catania, Catania, Italy
- 5Osservatorio Vesuviano, INGV - Sezione di Napoli, Napoli, Italy
- 6INFN - Sezione di Genova, Genova, Italy
Rock strains detection is one of the principal ways to monitor geohazards. Classic strainmeters are cumbersome, hard to install and very expensive. Opto-electronics devices based on fiber Bragg grating technology allow to realize strainmeters with high sensitivity, low-cost, small volume and high performance.
We present the long term result of continuous soil strain monitoring on the Etna mount by a three-axial fiber Bragg grating sensor. The sensor has been developed in the framework of European Project MED-SUV (MEDiterranean SUpersite Volcanos). The installation site is a 8.5 meters deep borehole at a distance of about 7 km South-West from the summit craters of the Etna mount, at an elevation of about 1740 meters. This kind of sensor has a resolution better than 100 nanostrains on a daily timescale. Despite it is only a prototype, the sensor has worked for four years with a duty-cycle higher than 90% detecting both fast event, as earthquakes, and slow event, as epochal rocks strain behavior.
How to cite: Giacomelli, U., Maccioni, E., Carelli, G., Carbone, D., Gambino, S., Orazi, M., Peluso, R., and Sorrentino, F.: Four years of soil strain monitoring on Etna Volcano Mount by means of a Three-axial Fiber Bragg Grating Sensor, EGU General Assembly 2020, Online, 4–8 May 2020, EGU2020-18084, https://doi.org/10.5194/egusphere-egu2020-18084, 2020.