NEAR FAULT VELOCITY PULSE ESTIMATION: THE CEPHALONIA FEB. 3, 2014 EARTHQUAKE (M6.0)


N. Theodoulidis
I. Grendas
Résumé

Near fault ground motions can be significantly different than those further away from the seismic source. Within the near fault zone ground motions are drastically influenced by the rupture mechanism, the direction of rupture propagation relative to the site and possible permanent displacement related to the fault slip. During the past two decades several sophisticated theoretical or/and empirical methods have been proposed to simulate near fault motion requiring input parameters that hardly can be provided with accuracy, leading thus to extended parametric studies and uncertainties. In this paper, a simple but effective analytical model that mathematically represents near fault ground motions (Mavroeidis and Papageorgiou, 2003) is applied and tested in the case of Cephalonia, Feb. 3, 2014 earthquake (Μ6.0). Its validity and reliability are examined and an effort to distinguish source and possible site effects is attempted for the town of Lixouri (LXR1 accelerograph) where the highest damage levels was observed.

Article Details
  • Rubrique
  • Seismology
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Références
Boncori, J.P.M., Papoutsis, I., Pezzo, C., T., Atzori, S., Ganas, A., Karastathis, V., Salvias, S.,
Kontoes, C. and Antonioli, A., 2015. The February 2014 Cephalonia Earthquake (Greece):
D Deformation Field and Source Modeling from Multiple SAR Techniques, Seismol. Res.
Lett., 86-1, 124-137.
Boore, D., Stewart, J., Seyhan, E. and Atkinson, G., 2014. NGA – West2 Equations for Predicting PGA,
PGV, and 5% Damped PSA for Shallow crustal Earthquakes, Earthquake Spectra, 30, 1057-
Bouchon, M., 1979. Predictability of ground displacement and velocity near an earthquake fault: An
example-The Parkfield earthquake of 1966, J. Geophys. Res., 84, 6149-6156.
Geopsy software, www.geopsy.org.
Hatzidimitriou, P., Papazachos, C., Kiratzi, A. and Theodulidis, N., 1993. Estimation of attenuation
structure and local earthquake magnitude based on acceleration records in Greece,
Tectonophysics, 217, 243-253.
Lermo, J. and Chavez-Garcıa, F.J., 1994. Site effect evaluation at Mexico City: dominant period and
relative amplification from strong motion and microtremor records, Soil Dyn. & Earthq.
Eng., 13, 413-23.
Louvari, E., Kiratzi, A. and Papazachos, B.C., 1999. The Cephalonia Transform Fault and its
extension to western Lefkada Island (Greece), Tectonophysics, 308, 223-236.
Mavroeidis, G. and Papageorgiou, A., 2003. A Mathematical Representation of Near- Fault Ground
Motions, Bull. Seismol. Soc. Am., 93, 1099-1131.
MATLAB and Statistics Toolbox Release v8.0.0, 2012. The MathWorks, Inc., Natick,
Massachusetts United States.
Nakamura, Y., 1989. A method for dynamic characteristics estimation of subsurface using microtre
mor on the ground surface, QR Railway Tech. Res. Inst., 30, 25-33.
Rodriguez-Marek, A., 2000. Near fault seismic site response, PhD Thesis, Civil Engin., University
of California, Berkeley, 451 pp.
SESAME Project, 2004. Deliverable D23.12: Guidelines for the implementation of the H/V spectral
ratio technique on ambient vibrations measurements, processing and interpretation, available
Theodoulidis, N. and Bard, P.-Y., 1995. Horizontal to vertical spectral ratio and geological
conditions: an analysis of strong motion data from Greece and Taiwan (SMART-1), Soil Dyn.
& Earthq. Eng., 14, 177-197.
Theodoulidis, N., Karakostas, C., Lekidis, V., Makra, K., Margaris, B., Morfidis, K., Papaioannou,
C., Rovithis, G., Salonikios, T. and Savvaidis, A., 2016. The Cephalonia, Greece, Jauary 26
(M6.1) and February 3, 2014 (M6.0) earthquakes: Near fault ground motion and effects on
soil & structures, Bull. Europ. Earthq. Eng., 14, 1-38.
Scordilis, E.M., Karakaisis, G.F., Karakostas, B.G., Panagiotopoulos, D.G., Comninakis, P.E. and
Papazachos, B.C., 1985. Evidence for transform faulting in the Ionian Sea. The Cephalonia
island earthquake sequence of 1983, Pure Appl. Geophys, 123, 388-397.
Somerville, P., 2003. Magnitude scaling of the near fault rupture directivity pulse, Physics Earth &
Planet. Int., 137, 201-212.
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