Articles | Volume 3, issue 3/4
Nat. Hazards Earth Syst. Sci., 3, 165–170, 2003
https://doi.org/10.5194/nhess-3-165-2003

Special issue: Earthquake Precursory Phenomena

Nat. Hazards Earth Syst. Sci., 3, 165–170, 2003
https://doi.org/10.5194/nhess-3-165-2003

  31 Aug 2003

31 Aug 2003

Relatively small earthquakes of Javakheti Highland as the precursors of large earthquakes occuring in the Caucasus

M. Kachakhidze1, N. Kachakhidze1, R. Kiladze2, V. Kukhianidze2, and G. Ramishvili2 M. Kachakhidze et al.
  • 1Tbilisi State University, Chavchavadze st. 2, Tbilisi 380028, Georgia
  • 2Abastumani Astrophysical Observatory, Kazbegi av. 2a, Tbilisi 380060, Georgia

Abstract. Javakheti Highland is one of the most seismic active regions of the Caucasus. The majority of earthquakes observed throughout the region occur within this small area (f = 40.8° – 41.8° ; l = 43.3° – 44.3°). One can expect that exclusive seismic activity of Javakheti Highland testifies to global geophysical processes which take place throughout the Caucasus region. Based on the above-mentioned, of interest was to study variation with time of the number of earthquakes occurring in Javakheti region. We analysed some 695 relatively small earthquakes (2.5 < M < 6.0) observed in Javalkheti Highland within the period of 1961–1992 with regard to large earthquakes M > 6.0 of the region which occurred in the same period. It was found that each large earthquake of the Caucasus is anticipated by clear precursor in a form of an anomalous change in the number of relatively small earthquakes in Javakheti Highland.

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