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Crustal stress and seismic activity in the Ionian archipelago as inferred by satellite- and ground-based observations, Kefallinìa, Greece

By
Maurizio Poscolieri
Maurizio Poscolieri
1
Istituto di Acustica O. M. Corbino (CNR) via Fosso del Cavaliere 100, 00133 Roma, Italy (e-mail: giovanni.gregori@idac.rm.cnr.it; gabriele.paparo@idac.rm.cnr.it; maurizio.poscolieri@idac.rm.cnr.it; pangelu@tiscalinet.it)
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Evangelos Lagios
Evangelos Lagios
2
National and Kapodistrian University of Athens, Geophysics Laboratory, Space Applications in Geosciences Panepistimiopolis, Ilissia, Athens 157 84, Greece (e-mail: sakkas@geol.uoa.gr;lagios@geol.uoa.gr; Vassilopoulou@geol.uoa.gr
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Giovanni P. Gregori
Giovanni P. Gregori
1
Istituto di Acustica O. M. Corbino (CNR) via Fosso del Cavaliere 100, 00133 Roma, Italy (e-mail: giovanni.gregori@idac.rm.cnr.it; gabriele.paparo@idac.rm.cnr.it; maurizio.poscolieri@idac.rm.cnr.it; pangelu@tiscalinet.it)
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Gabriele Paparo
Gabriele Paparo
1
Istituto di Acustica O. M. Corbino (CNR) via Fosso del Cavaliere 100, 00133 Roma, Italy (e-mail: giovanni.gregori@idac.rm.cnr.it; gabriele.paparo@idac.rm.cnr.it; maurizio.poscolieri@idac.rm.cnr.it; pangelu@tiscalinet.it)
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Vassilis A. Sakkas
Vassilis A. Sakkas
2
National and Kapodistrian University of Athens, Geophysics Laboratory, Space Applications in Geosciences Panepistimiopolis, Ilissia, Athens 157 84, Greece (e-mail: sakkas@geol.uoa.gr;lagios@geol.uoa.gr; Vassilopoulou@geol.uoa.gr
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Issaak Parcharidis
Issaak Parcharidis
5
Harokopio University of Athens Athens, Greece (e-email: parchar@hua.gr)
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Iginio Marson
Iginio Marson
3
Istituto Nazionale di Oceanografia e Geofisica Sperimentale (OGS) Borgo Grotta Gigante 42/c, 34010 Sgonico, Trieste, Italy (e-mail: marson@univ.trieste,it; marson@ogs.trieste,it)
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Konstantinos Soukis
Konstantinos Soukis
4
Department of Geology, University of AthensAthens, Greece (email: evasilak@geol,uoa.gr; soukis@geol.uoa.gr)
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Emmanuel Vassilakis
Emmanuel Vassilakis
4
Department of Geology, University of AthensAthens, Greece (email: evasilak@geol,uoa.gr; soukis@geol.uoa.gr)
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Francesco Angelucci
Francesco Angelucci
1
Istituto di Acustica O. M. Corbino (CNR) via Fosso del Cavaliere 100, 00133 Roma, Italy (e-mail: giovanni.gregori@idac.rm.cnr.it; gabriele.paparo@idac.rm.cnr.it; maurizio.poscolieri@idac.rm.cnr.it; pangelu@tiscalinet.it)
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Spyridoula Vassilopoulou
Spyridoula Vassilopoulou
2
National and Kapodistrian University of Athens, Geophysics Laboratory, Space Applications in Geosciences Panepistimiopolis, Ilissia, Athens 157 84, Greece (e-mail: sakkas@geol.uoa.gr;lagios@geol.uoa.gr; Vassilopoulou@geol.uoa.gr
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Published:
January 01, 2006

Abstract

Different observational techniques are compared in order to investigate possible correlations in seismic activity. The study site is the island of Kefallinìa (Greece), where measurements available included (1) DInSAR, DGPS, and DEM data, (2) soil exhalation measured by monitoring Radon (Rn) well content, and (3) acoustic emissions (AE) at high and low frequency (point-like records with high temporal resolution). AE records provide: (1) relative time variation of the applied stress intensity and (2) the state of fatigue of stressed rock volumes, the AE source. Our results indicate that the large spatial scale (poor time resolution) may be considered quite satisfactory, whereas fractal analysis of the AE time series displayed some discrepancies when compared to analogous investigations in the Italian Peninsula. Therefore, some refinement is needed in order to reach more precise interpretations of the relevant information available with this kind of data. However, both sets of observations appear in agreement with each other, although more exhaustive investigations would require a suitable array of point-like AE and Rn (or other) measuring sites, as well as longer data series. The latter are particularly helpful for detailed interpretations of the different occurrences within tectonically complex settings where crustal stress crises are marked by various types of geological phenomena.

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Contents

Geological Society, London, Special Publications

Fractal Analysis for Natural Hazards

G. Cello
G. Cello
University of Camerino, Italy
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B. D. Malamud
B. D. Malamud
King's College London, UK
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Geological Society of London
Volume
261
ISBN electronic:
9781862395091
Publication date:
January 01, 2006

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