Ground deformation measurements over Lake Trichonis based on SAR interferometry.

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Published: Jan 24, 2013
DOI: https://doi.org/10.12681/bgsg.10951
Keywords:
SAR interferometry ground deformation earthquake swarm Trichonis Lake Greece
G. Benekos
Harokopio University of Athens, Department of Geography
I. Parcharidis
Harokopio University of Athens, Department of Geography
M. Foumelis
European Space Agency (ESA-ESRIN)
A. Ganas
National Observatory of Athens, Geodynamic Institute
Abstract

The aim of this study is to detect and measure ground deformation over the broader area of Lake Trichonis (Western Greece), focusing mainly on the April 2007 earthquake swarm which occurred at the vicinity of the Lake. The area, forming a pull-apart basin, presented historically an intense seismic activity along the two active normal faults at the northern and southern part of the Lake. The swarm
initiated by small magnitude events on the 8th of April 2007 followed by the three strongest events of the entire sequence on the 10th of April 2007, with magnitudes ranging from 5.0 to 5.2 Mw. The seismic activity continued for longer with smaller seismic events. Based on seismological data this activity was attributed to two unmapped NW SE trending normal faults that bounds the SE bank of the Lake. Using a dataset of 28 ENVISAT ASAR scenes covering the period from February 2003 until February 2010 (~7 yr), different Interferometric Stacking techniques was applied in order to quantify the ground deformation induced by the earthquake swarm as well as its effect on the inter-seismic deformation pattern of the area. Our results indicate that co-seismic motion differs significantly from that observed
during the pre- and post- swarm periods. The co-seismic pattern reveals subsidence at the northern and uplift at the southern lake sides, consistent with the structural model already proposed for the area. For the pre- and post-seismic periods both sides of the Lake show stability or low rates of subsidence with higher deformation
velocity rates for the period after the seismic activity, possibly attributed to postseismic relaxation. Our findings imply that inter-seismic ground deformation does not necessary follow the deformation pattern observed during seismic triggering, thus, long-term geodetic observations such as those provided by SAR interferometry are valuable in order to fully characterize the geodynamic behavior of an active region.

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References
Carnec C. and Fabriol H. 1999. Monitoring and modeling land subsidence at the Cerro-Prieto geothermal field, Baja California, Mexico, using SAR interferometry, Geophys. Res. Lett. 9, 1211–1214.
Costantini M. 1998. A novel phase unwrapping method based on network programming, 1998, IEEE Trans. GARS, 36 (3), 813 – 821.
Delibasis N. and Carydis P. 1977. Recent earthquake activity in Trichonis region and its tectonic significance, Ann. Geofys. 30, 19–81
Donnellan A., Parker and Peltzer G., 2002. Combined GPS and InSAR models of postseismic deformation from the Northridge earthquake, Pure and Applied Geophysics 159, 2261–2270.
Doutsos T., Kontopoulos N. and Frydas D. 1987. Neotectonic evolution of northwestern-continental Greece, Geol. Rundsch. 76, 433–450.
Evangelidis C.P., Konstantinou K.I., Melis N.S., Charalambakis M. and Stavrakakis G.N. 2008. Waveform relocation and focal mechanism analysis of an earthquake swarm in Trichonis lake, western Greece, Bull. Seism. Soc. Am. 98(2), pp. 804-811.
Foumelis M., Parcharidis I., Lagios E. and Voulgaris N. 2009. Evolution of post-seismic ground deformation of the Athens 1999 earthquake observed by SAR interferometry, J. Appl. Geophys. 69 (1), 16–23.
Galloway D.L., Hudnut K.W., Ingebritsen S.E., Phillips S.P., Peltzer G., Rogez F. and Rosen P.A.1998. Detection of aquifer system compaction and land subsidence using interferometric synthetic aperture radar, Antelope Valley, Mojave Desert, California,Water Resources Research, 34 (10), pp. 2573-2585.
Goldstein R. and Werner C. 1998. Radar interferogram filtering for geophysical applications, Geophys. Res. Lett. 25 (21), 4035–4038.
IGME 1977. Geological Map of Greece, Scale 1:50.000, Thermon Sheet, D.L. Loftus, N. Philippakis and A. Mavridis, The Institute of Geological and Minning Researche
Kiratzi A., Sokos E., Ganas A., Tselentis A., Benetatos C., Roumelioti Z., Serpetsidaki A., Andriopoulos G., Galanis O. and Petrou P. 2008. The April 2007 earthquake swarm near Lake Trichonis and implications for active tectonics in western Greece, Tectonophysics 452, 51- 65.
Massonnet D. and Adragna F. 1993. A full-scale validation of Radar Interferometry with ERS-1: the Landers earthquake, Earth Observation Quarterly, 41.
Massonnet D., Rossi M., Carmona C., Adragna F., Pelmtzer G., Feigl K. and Rabaute T. 1993. The displacement field of the Landers Earthquake mapped by radar interferometry, Nature364, 138–142.
Scharoo R. and Visser P.N.A.M. 1998. Precise orbit determination and gravity field improvement for the ERS satellites, Journal Geophysical Research, vol. 103, 8113-8127.
Papazachos B. and Papazachou K. 1997. The Earthquakes of Greece, Ziti Editions, Thessaloniki, Greece.
Parcharidis Is., Lagios E., Sakkas V., Raucoules D., Feurer D., Le Mouelic S., King C., Carnec C., Novali F., Ferretti A., Capes R. and Cooksley G. 2006, Subsidence monitoring within the Athens Basin (Greece) using space radar interferometric techniques, Earth Planets Space, 58, 505–513, 2006.
Peltzer G. and Crampé F. 1999. Evidence of non-linear elasticity of the crust from the Mw7.6 Manyi (Tibet) earthquake surface displacement field, Science 286 (5438), 272–276.
Peltzer G., Rosen P. and Rogez F. 1998. Poro-elastic rebound along the Landers 1992 earthquake surface rupture, Journal of Geophysical Research B: Solid Earth 103 (B12), 30131–30145.
Raucoules D., Parcharidis I., Feurer D., Novalli F., Ferretti A., Carnec C., Lagios E., Sakkas V., Le Mouelic S., Cooksley G. and Hosford S. 2008. Ground deformation detection of the greater area of Thessaloniki (Northern Greece) using radar interferometry techniques, Natural Hazards Earth Syst. Sci. J. 8 (4), 779–788.
Sokos E., Pikoulis V.E, Psarakis E.Z. and Lois A. 2010. THE APRIL 2007 SWARM IN TRICHONIS LAKE USING DATA FROM A MICROSEISMIC NETWORK, Bulletin of the Geological Society of Greece 2010, Proceedings of the 12th International Congress Patras May, XLIII, No 4 – 2183.
Strozzi T., Wegmuller U., Tosi L., Bitelli G. and Spreckels V. 2001. Land subsidence monitoring with differential SAR interferometry, Photogramm. Eng. Remote Sens. 67, 1261–1270.
Wright P., Stow, R., 1999. Detecting mining subsidence from Space, Int. J. Remote Sens. 20 (6), 1183–1188.
Zebker H.A., Rosen P.A., Goldstein R.M., Gabriel A. and Werner C.L. 1994. On the derivation of coseismic displacement-fields using differential radar interferometry: the Landers earthquake, J. Geophys. Res. Solid Earth 99 (B10), 19617–19634
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