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Borehole Volumetric Strainmeter Calibration From a Nearby Seismic Broadband Array at Etna Volcano
- 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.
- Subjects :
- Seismometer
010504 meteorology & atmospheric sciences
Borehole
Strainmeter
010502 geochemistry & geophysics
Geodesy
01 natural sciences
Geophysics
Space and Planetary Science
Geochemistry and Petrology
Seismic array
Earth and Planetary Sciences (miscellaneous)
Calibration
Range (statistics)
Coherence (signal processing)
Dilatometer
Seismology
Geology
0105 earth and related environmental sciences
Subjects
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