Articles | Volume 12, issue 4
Solid Earth, 12, 993–1003, 2021
https://doi.org/10.5194/se-12-993-2021

Special issue: Fibre-optic sensing in Earth sciences

Solid Earth, 12, 993–1003, 2021
https://doi.org/10.5194/se-12-993-2021

Research article 28 Apr 2021

Research article | 28 Apr 2021

On the comparison of strain measurements from fibre optics with a dense seismometer array at Etna volcano (Italy)

Gilda Currenti et al.

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Cited articles

Ajo-Franklin, J. B., Dou, S., Lindsey, N. J., Monga, I., Tracy, C., Robertson, M., Tribaldos, V. R., Ulrich, C., Freifeld, B., Daley, T., and Li, X.: Distributed acoustic sensing using dark fiber for near-surface characterization and broadband seismic event detection, Scientific Reports, 360, 1–14, 2019. 
Andronico, D. and Lodato, L.: Effusive Activity at Mount Etna Volcano (Italy) During the 20th Century: A Contribution to Volcanic Hazard Assessment, Nat. Hazards, 36, 407–443, https://doi.org/10.1007/s11069-005-1938-2, 2005. 
Azzaro, R., Branca, S., Gwinner, K., and Coltelli, M.: The volcano-tectonic map of Etna volcano, 1:100.000 scale: an integrated approach based on a morphotectonic analysis from high-resolution DEM constrained by geologic, active faulting and seismotectonic data, Ital. J. Geosci., 131, 153–170, https://doi.org/10.3301/IJG.2011.29, 2012. 
Bakku, S. K.: Fracture characterization from seismic measurements in a borehole, PhD thesis, Massachusetts Institute of Technology, MA, USA, 2015. 
Basu, D., Whittaker, A. S., and Costantinou, M. C.: Extracting rotational components of earthquake ground motion using data recorded at multiple station, Earthquake Engng. Struct. Dyn., 42, 451–468, https://doi.org/10.1002/eqe.2233, 2013. 
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Short summary
We investigate the capability of distributed acoustic sensing (DAS) to record dynamic strain changes related to Etna volcano activity in 2019. To validate the DAS measurements, we compute strain estimates from seismic signals recorded by a dense broadband array. A general good agreement is found between array-derived strain and DAS measurements along the fibre optic cable. Localised short wavelength discrepancies highlight small-scale structural heterogeneities in the investigated area.