Determination of Δσ and κ0 from response spectra of large earthquakes in Greece

We fit an ω−2 model to response spectra from eight recent Greek earthquakes ranging in size from M = 5.8 to M = 6.9. The diminution parameter κ0 was determined for each site, with a value near 0.06 for a typical soil site. The stress parameter (Δσ) showed little variation from earthquake to earthquake and had a mean value of 56 bars over all earthquakes. Predictions of peak velocity, peak acceleration, rupture duration, and fault length using the derived stress parameters are consistent with observations. Frequency-dependent site amplifications were included in all estimates; the combined effect of amplification and attenuation had a maximum value close to a factor of 2.5 for a typical soil site, relative to the motions at the surface of a perfectly elastic uniform half-space composed of materials near the source. The results form the foundation for predictions of strong motions in Greece for distances and magnitudes other than those for which data are available.

[1]  David M. Boore,et al.  Prediction of earthquake response spectra , 1982 .

[2]  Robin K. McGuire,et al.  The character of high-frequency strong ground motion , 1981 .

[3]  B. Papazachos,et al.  Toward a homogeneous moment-magnitude determination for earthquakes in Greece and the surrounding area , 1997, Bulletin of the Seismological Society of America.

[4]  W. Silva,et al.  An empirical study of earthquake source spectra for California earthquakes , 1997, Bulletin of the Seismological Society of America.

[5]  Surface fault traces, fault plane solution and spatial distribution of the aftershocks of the September 13, 1986 earthquake of Kalamata (Southern Greece) , 1988 .

[6]  W. B. Joyner,et al.  A scaling law for the spectra of large earthquakes , 1984 .

[7]  G. R. Toro,et al.  Model of Strong Ground Motions from Earthquakes in Central and Eastern North America: Best Estimates and Uncertainties , 1997 .

[8]  David M. Boore,et al.  Site amplifications for generic rock sites , 1997, Bulletin of the Seismological Society of America.

[9]  David M. Boore.  Use of seismoscope records to determine ML and peak velocities , 1984 .

[10]  P. Hatzidimitriou,et al.  S-wave attenuation in the crust in northern Greece , 1995, Bulletin of the Seismological Society of America.

[11]  W. B. Joyner,et al.  ESTIMATION OF RESPONSE SPECTRA AND PEAK ACCELERATIONS FROM WESTERN NORTH AMERICAN EARTHQUAKES: AN INTERIM REPORT PART 2 , 1993 .

[12]  B. C. Papazachos,et al.  Dependence of strong ground motion on magnitude-distance, site geology and macroseismic intensity for shallow earthquakes in Greece: I, Peak horizontal acceleration, velocity and displacement , 1992 .

[13]  C. DAVISON,et al.  The Earthquakes in Greece , 1894, Nature.

[14]  Panos Dakoulas,et al.  Local‐soil and source‐mechanism effects in the 1986 kalamata (Greece) earthquake , 1990 .

[15]  D. Panagiotopoulos,et al.  Evidence for transform faulting in the Ionian sea: The Cephalonia island earthquake sequence of 1983 , 1985 .

[16]  John G. Anderson,et al.  A MODEL FOR THE SHAPE OF THE FOURIER AMPLITUDE SPECTRUM OF ACCELERATION AT HIGH FREQUENCIES , 1984 .

[17]  Gail M. Atkinson,et al.  STOCHASTIC PREDICTION OF GROUND MOTION AND SPECTRAL RESPONSE PARAMETERS AT HARD-ROCK SITES IN EASTERN NORTH AMERICA , 1987 .

[18]  K. Pitilakis,et al.  The Griva, Northern Greece, Earthquake of Dec. 21, 1990 , 1992 .

[19]  Anastasia Kiratzi,et al.  Estimation of attenuation structure and local earthquake magnitude based on acceleration records in Greece , 1993 .

[20]  W. B. Joyner,et al.  Measurement, Characterization, and Prediction of Strong Ground Motion , 1988 .

[21]  Gail M. Atkinson,et al.  Some Comparisons Between Recent Ground- Motion Relations , 1997 .

[22]  Panayotis G. Carydis.  The Central Greece earthquakes of February - March 1981 , 1982 .

[23]  G. Tselentis.  Shallow attenuation in the west Corinth-Patras rift, Greece , 1993 .

[24]  K. Pitilakis,et al.  A Theoretical Investigation of Source, Path and Site Effects During the 1986 Kalamata Earthquake (Greece) , 1991 .

[25]  D. Rinaldis,et al.  The Kalamata, Greece, Earthquake of September 13, 1986 , 1987 .

[26]  D. Boore.  Stochastic simulation of high-frequency ground motions based on seismological models of the radiated spectra , 1983 .

[27]  Peter M. Shearer,et al.  Introduction to Seismology , 2019 .

[28]  G. Atkinson,et al.  Spectral scaling of the 1985 to 1988 Nahanni, Northwest Territories, earthquakes , 1989 .

[29]  P. Hatzidimitriou.  Attenuation of coda waves in northern Greece , 1993 .

[30]  Mihailo D. Trifunac,et al.  On the correlation of seismic intensity scales with the peaks of recorded strong ground motion , 1975 .

[31]  G. S. Stewart,et al.  A source study of the Thessaloniki (northern Greece) 1978 earthquake sequence , 1981 .

[32]  E. Papadimitriou,et al.  Properties of the February-March 1981 seismic sequence in the alkyonides gulf of central Greece , 1984 .