PROPERTIES OF FORESHOCKS AND AFTERSHOCKS IN THE AREA OF GREECE

PDF
Published: Jan 1, 2004
DOI: https://doi.org/10.12681/bgsg.16530
M. C. Kourouzidis
Institute of Geodynamics, National Observatory of Athens
G. F. Karakaisis
Geophysical Laboratory, School of Geology, Aristotle University of Thessaloniki
B. C. Papazachos
Geophysical Laboratory, School of Geology, Aristotle University of Thessaloniki
C. Makropoulos
Department of Geophysics and Geothermy, Faculty of Geology, National & Kapodistrian University of Athens
Abstract

The results of the study of seismic sequences of all the mainshocks with M>5.6 during 1911-1965 and M>5.0 during 1966-1985 which occurred in the Aegean and surrounding area are presented. As regards the foreshocks, two relations have been proposed that can be used to determine (1) the probability that at least one foreshock, with magnitude Mf or larger, will precede a strong (M>6.0) earthquake, and (2) the probability for the largest foreshock to occur during t days before the mainshock. It was also found that the rate of foreshock occurrence, N(TS), increases as the time of the mainshock approaches and is described by a power-law function. The time and magnitude distribution of several foreshock sequences were also studied. The study of aftershock sequences concerned properties of their largest aftershock, the dependence of the duration and number of the aftershocks on the magnitude of the mainshock and the time and magnitude distribution of several aftershock sequences. The conclusion is that the study of a seismic excitation which is based on continuous monitoring and fast determination of the basic focal parameters of the earthquakes can contribute to clarify whether this activity evolves normally or not.

Article Details
  • Section
  • Seismology
Creative Commons License

This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.

Authors who publish with this journal agree to the following terms:

Authors retain copyright and grant the journal right of first publication with the work simultaneously licensed under a Creative Commons Attribution Non-Commercial License that allows others to share the work with an acknowledgement of the work's authorship and initial publication in this journal.

Authors are able to enter into separate, additional contractual arrangements for the non-exclusive distribution of the journal's published version of the work (e.g. post it to an institutional repository or publish it in a book), with an acknowledgement of its initial publication in this journal. Authors are permitted and encouraged to post their work online (preferably in institutional repositories or on their website) prior to and during the submission process, as it can lead to productive exchanges, as well as earlier and greater citation of published work.

Downloads
Download data is not yet available.
References
Comninakis P., Drakopoulos J., Moumoulidis G. & Papazachos B.C. 1968. Foreshock and aftershock sequences of the Cremasta earthquake and their relation to the waterloading of the Cremasta artificial lake. Annali di Geofisica, 21, 39-71.
Comninakis P.E., & Papazachos B.C. 1989. Aftershocks and foreshocks sequences in Greece and surrounding area during the period 1911-1985. Pubi. Lab. Geophysics, Univ. of Thessaloniki, 5, pp. 156.
Drakatos G & Latoussakis J. 1994. Some features of aftershock patterns in Greece. Geophys. J. Int., 126, 123-134.
Drakatos G., & Latoussakis J., 2001. A catalogue of aftershock sequences in Greece (1971-1997): Their spatial and temporal characteristics. J. Seismology, 5, 137-145.
Drakopoulos J.K. 1968. Characteristic parameters of fore- and aftershock seismic sequences in the area of Greece. Ph. D. Thesis, Univ. of Athens, 128 pp.
Gutenberg Β. & Richter CF. 1944. Frequency of earthquakes in California. Bull. Seism. Soc. Am., 34, 185-188.
Karakaisis G. 1984. Contribution to the study of the seismic sequences in the Aegean and surrounding area. Ph. D. Thesis, Univ. of Thessaloniki, pp. 192.
Karakaisis G.F., Karacostas B.G., Papadimitriou E.E., Scordilis E.M. & Papazachos B.C. 1985. Seimic sequences in Greece interpreted in terms of barrier model. Nature, 315, 212-214.
Kourouzidis M.C. 2003. Study of seismic sequences in Greece and its contribution to earthquake prediction. Ph. D. Thesis, Univ. of Thessaloniki, pp. 150 (in Greek with English abstract).
Latoussakis J., Stavrakakis G., Drakopoulos J., Papanastassiou D. & Drakatos G. 1991. Temporal characteristics of some earthquake sequences in Greece. Tectonophysics, 193, 299-310.
Latoussakis J. & Drakatos G. 1994. A quantitative study of some aftershock sequences in Greece. Tectonophysics, 143, 603-616.
Lomnitz C. 1966. Magnitude stability in earthquake sequences. Bull. Seism. Soc. Am., 56, 247-249.
Mogi Κ. 1962. Study of elastic shocks caused by the fracture of heterogeneous materials and their relation to earthquake phenomena. Bull. Earthq. Res. Inst., Univ. Tokyo, 40, 125-73.
Omori F. 1894. On aftershocks of earthquakes. J. Coll. Sc. Imp. Univ. Tokyo, 7, 111-200.
Papadopoulos G.A. 1988. Long term accelarating foreshock activity may indicate the occurrence time of a strong shock in the western Hellenic arc. Tectonophysics, 152. 179-192.
Papadopoulos G.A., Makropoulos K.C. & Dedousis V. 1991. Precursory variation of the foreshock fractal dimension in time. Int. Conf. on Earthq. Pred. Res., State-of-the-Art, Strasbourg, 15-18 Oct. 1991, 92-96.
Papadopoulos G.A., Drakatos G. & Plessa A. 2000. Foreshock activity as a precursor of strong earthquakes in Corinthos gulf, central Greece. Phys. Chem. Earth, 25, 239-245.
Papanastassiou D. Drakopoulos J., Drakatos G, Latoussakis J. & Stavrakakis G. 1989. v-value model for earthquake prediction. An application to some recent earthquake sequences in Greece. Bull. Geol. Soc. Greece, XXIII/3, 129-143.
Papazachos B.C. 1971. Aftershock activity and aftershock risk in the area of Greece. Ann. Geofis., 24, 439-456.
Papazachos B.C. 1973. The time distribution of the reservoir associated foreshocks and its importance to the prediction of the principal shock. Bull. Seism. Soc. Am., 63, 1973-1978.
Papazachos B.C. 1974a. On certain aftershock and foreshock parameters in the area of Greece. Ann. Geofis., 27,497-515.
Papazachos B.C. 1974b. On the relation between certain artificial lakes and the associated seismic sequences. Eng. Geology, 8, 39-48.
Papazachos B.C. 1974c. On the time distribution of aftershocks and foreshocks in the area of Greece. Pure appi. Geophys., 112, 627-631.
Papazachos B.C. 1974d. Dependence of the seismic parameter b on the magnitude range. Pure appi. Geophys., 112, 1059-1065.
Papazachos B.C. 1975. Foreshocks and earthquake prediction. Tectonophysics, 28, 213-226.
Papazachos B.C. 1989. Measures of the earthquake size in the area of Greece. 1st Scientific Congress of the Hellenic Geophysical Union, Athens, April 1989, 437-447.
Papazachos B.C., Delibasis N., Liapis N., Moumoulidis G. & Purcaru G. 1967. Aftershock sequences of some large earthquakes in the region of Greece. Ann. Geofis., 20, 1-93.
Papazachos B.C., Tsapanos T.M. & Panagiotopoulos D.G. 1982. A preliminary pattern of earthquakes in northern Greece. Nature, 296(5854;, 232-235.
Papazachos B.C., Tsapanos T.M. & Panagiotopoulos D.G. 1983. The time, magnitude and space distributions of the 1978 Thessaloniki seismic sequence. In: The Thessaloniki, Northern Greece, earthquake of June 20, 1978 and its seismic sequence, Eds. B.C. Papazachos & P.G. Carydis, Tech. Ch. Greece, Thessaloniki, 117-131.
Papazachos B.C. & Papazachou C. 1989. The earthquakes of Greece. Editions Ziti, Thessaloniki, 356 pp.
Papazachos B., Karakaisis G., Hatzidimitriou P., Karakostas B., Kiratzi Α., Leventakis G., Margaris B., Panagiotopoulos D., Papadimitriou E., Papaioannou Ch., Papazachos C, Savvaidis Α., Scordilis E., Theodulidis N., Tsapanos T. & Dimitriou P.A. 2000. A procedure to assess the evolution of a seismic sequence. Ann. Geol. Pays Hell., XXXVIII, 119-128.
Papazachos B.C., Comninakis P.E., Karakaisis G.F, Karakostas B.G., Papaioannou Ch.A., Papazachos C.B. & Scordilis E.M. 2003. A Catalogue of Earthquakes in Greece and Surrounding Area for the Period 550 B.C.- 2002. Pubi. Geoph. Lab. Univ. of Thessaloniki.
Ranalli G. 1969. A statistical study of aftershock sequences. Ann. Geophys., 22, 359-397.
Utsu T. 1965. A method for determining the value of b in a formula logn=a-bM showing the magnitudefrequency relation for earthquakes. Geoph. Bull. Hokkaido Univ., 13, 99-103.
Wessel P. & Smith W. 1995. New version of the Generic Mapping Tools. EOS Trans. Am. Geophys. U., 76: 329.
Yamashita T. & Knopoff L. 1989. A model of foreshock occurrence. Geophys. Jour., 96, 389-399.
Most read articles by the same author(s)