The Athens 1999 mainshock (Mw=5.9)and the evolution of its aftershock sequence

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Published: Jan 1, 2001
DOI: https://doi.org/10.12681/bgsg.17266
Keywords:
Aftershock sequence spatial and temporal aftershock distribution normal faulting
C. B. PAPAZACHOS
Dept. of Geophysics, School of Geology, Aristotle University of Thessaloniki
B. G. KARAKOSTAS
Dept. of Geophysics, School of Geology, Aristotle University of Thessaloniki
G. F. KARAKAISIS
Dept. of Geophysics, School of Geology, Aristotle University of Thessaloniki
CH. A. PAPAIOANNOU
Inst, of Seismology & Earthquake Engineering
Abstract

The spatial distribution of the aftershocks that followed the September 1999 mainshock (Mw=5.9), which caused severe damage and loss of life in the nearby city of Athens, is examined in the present work. Ρ and S arrivals of seismic waves recorded by the permanent seismic network as well as by a number of digital seismographs and accelerographs, which had been deployed in the broader epicentral area shortly after the mainshock occurrence, were used for the determination of the focal parameters of the mainshock and its aftershocks. The spatial distribution of the aftershocks led to the recognition of the fault, which produced the September mainshock, while certain features of the rupture process may be deduced on the basis of their spatiotemporal variation

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  • Seismology
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References
GALANOPOULOS, A. G. 1967. The influence of the flunctuation of the Marathon lake elevation on local earthquake acticity in the Attica basin area, Annales Géologiques des Payes Helléniques 18, 281-306.
KISSLING, E., KRADOLFER, IL, AND MAURER H., VELEST user's guide, ΕΤΗ Zurich, Institute of Geophysics, 22pp.
KONTOES, C. , BRIOLE, P., SACHPAZI, M. , VEIS, G, ELIAS, P., KOTSIS, I. , SYKIOTI, O., REMY, D. 2000. Displacement field mapping and fault modelling of the ìw=5.9, September 7,1999 Athens earthquake based on ERS- 2 satellite radar interferometry, Geoph. Res. Let. 27, 3989-3992.
LAHR, J. C. 1999. HYPOELLIPSE: A Computer Program for Determining Local Earthquake Hypocentral Parameters, Magnitude and First-Motion Pattern (Y2K Compliant Version), U.S.Geological Survey Open-File Report 99-23.
PAPADIMITRIOU, P., KAVIRIS, G, VOULGARIS, N., KASSARAS, I., DELIBASIS, N, AND MAKROPOULOS, K. 2000. The September 7, 1999 Athens earthquake sequence recorded by the CORNET network: Preliminary results of source parameters determination of the mainshock. Annales Géologiques des Payes Helléniques 38, 29-40.
PAPADOPOULOS, G. Α., DRAKATOS, G., PAPANASTASSIOU, D., KALOGERAS, I., AND STAVRAKAKIS, G. 2000. Preliminary results about the catastrophic earthquake of the 7 September 1999 in Athens, Greece, Geophys. Res. Lei. 71, 3, 318-329.
PAPAZACHOS, B. C, AND PAPAZACHOU, C. C. 1997. The earthquakes of Greece, Ziti Pubi, Thessaloniki, 304pp.
PAPAZACHOS, Β. C, KARAKOSTAS, Β. G, KIRATZI, Α. Α., PAPADIMITRIOU, E. E., AND PAPAZACHOS, C. B. 1998. A model for the 1995 Kozani-Grevena seismic sequence, J. Geodynamics 26, 217-231.
PAPAZACHOS, C. B., AND KIRATZI, A. A. 1996. A detailed study of the active crustal deformation in the Aegean and surrounding area, Tectonophysics 253, 129-153.
PAPAZACHOS, C. B., AND NOLET G. 1997. Ρ and S deep velocity structure of the Hellenic area obtained by robust non-linear inversion of travel times, /. Geophys. Res. 102, 8349-8367.
THEODULIDIS, N, MARGARIS, B.N., PAPAIOANNOU, CH., AND DIMLTRIOU, P. 2000. Prelimirary report on the strong motion as selected sites of the meisoseismal area of NW Attica during the event of 7/9/1999, Technical Report.
TSELENTIS, G-A., AND ZAHRADNIK, J. 2000. Aftershock monitoring of the Athens earthquake of 7 September 1999, Geophys. Res. Let. 71, 3, 330-337.
VOULGARIS, N., KASSARAS, I., PAPADIMITRIOU, P., AND DELIBASIS, N. 2000. Preliminary results of the Athens September 7, 1999 aftershock sequence. Annales Géologiques des Payes Helléniques 38, 29-40.
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