Back to Search Start Over

Borehole Volumetric Strainmeter Calibration From a Nearby Seismic Broadband Array at Etna Volcano

Authors :
Alessandro Bonaccorso
Gilda Currenti
Antonino Sicali
Luciano Zuccarello
Source :
Journal of Geophysical Research: Solid Earth. 122:7729-7738
Publication Year :
2017
Publisher :
American Geophysical Union (AGU), 2017.

Abstract

Strainmeter and broadband seismic signals have been analyzed jointly with the aim of calibrating a borehole strainmeter at Etna volcano by using a seismo-geodetic technique. Our results reveal a good coherence between the dynamic strains estimated from seismometer data and strains recorded by a dilatometer in a low frequency range [0.03-0.06 Hz] at the arrival of teleseismic waves. This significant coherence enabled estimating the calibration coefficient and making a comparison with calibration results derived from other methods. In particular, we verified that the proposed approach provides a calibration coefficient that matches the results obtained from the comparison of the recorded strain both with theoretical strain tides and with normal-mode synthetic straingrams. The approach presented here has the advantage of exploiting recorded seismic data, avoiding the use of computed strain from theoretical models.

Details

ISSN :
21699313
Volume :
122
Database :
OpenAIRE
Journal :
Journal of Geophysical Research: Solid Earth
Accession number :
edsair.doi...........9147ac388e7c6850c959823e6c3e5f7f
Full Text :
https://doi.org/10.1002/2017jb014663