SVIBOR - Project code: 1-06-267


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Project code: 1-06-267

Temporal, Spatial and Physical Charactersitics of Seismicity

Main researcher: SKOKO, DRAGUTIN (43564)

Type of research: basic
Duration from: 01/01/91. to 12/31/96.

Papers on project (total): 46
Papers on project quoted in Current Contents: 7
Institution name: Prirodoslovno-matematički fakultet, Prirodoslovni odjeli, Zagreb (119)
Department/Institute: Department of Geophysics and Meteorology, Geophysical Institute A. Mohorovičić
Address: Horvatovac bb
City: 10000 - Zagreb, Croatia
Phone: 385 (0)41 420 222
Fax: 385 (0)41 426 233

Summary: The main results obtained are: - The knowledge of the seismicity of Croatia has been greatly improved by detailed analyses of recent as well as hystorical earthquakes. The most important result is the new and revised Catalog of earthquakes in Croatia. - New and more reliable magnitude relations were derived for the local as well as for the teleseismic events. - Quasisimultaneous inversion was applied to estimate the models of the Earth's crust and upper mantle in Croatia and adjacent regions, and to improve the locations of earthquakes in that area. - A prototype of the laser interferometer transducer for ground displacement was constructed. - By the analysis of coda waves, the attenuation properties of rocks in the Dinarides region were estimated.

Keywords: seismology, earthquake, seismicity, coda, earthquake magnitude, seismic risk, seismic hazard, Mohorovičić discontinuity, extreme values theory, fault plane solution

Research goals: Immediate objective of the investigations is the knowledge of the physical processes of the seismic generation in the Earth's crust in order to define the seismic hazard and specific seismic prediction parameters which will contribute to new achievements and will enable international scientific cooperation. The ultimate aim of the investigations is the satisfactory estimation of the place, intensity and time of an earthquake including the definition of the spatial and temporal seismic energy boundaries in order to attain more realistic planning and building in seismic areas. High quality seismic recording system adapted to the computer technology is expected. Numeruous seismogrammes from the earlier period (1908-1982) will be adequately reduced. Out of many expressions and procedures for earthquake magnitude determination, the acceptible ones will be selected and modified in accordance with the theoretical requirements. Seismic models of the Earth's crust and upper mantle will be modified by introducing the new parameters (lateral inhomogenity, velocity of Pg, Pb, Pn, Sg, Sb, Sn waves, Mohorovičić discontinuity inclination) which will result in better accuracy of earthquake location. Seismic characteristics (focal mechanism, maximum earthquake, activity) are being correlated analytically with corresponding geologic parameters, which results in better input parameters for engineering purposes. Various seismic hazard models (focal mechanism, attenuation functions, project earthquakes) require their continuous testing and modifying within their broad limits.


  1. Name of project: Regional and global seismicity - interpretation of hystorical seismograms
    Name of institution: University of Hamburg, Geophysical institute
    City: 20146 - Hamburg, Njemačka

  2. Name of project: Quantification of Earthquakes
    Name of institution: University of Hamburg, Gophysical Institute
    City: 20146 - Hamburg, Njemačka

  3. Name of project: Analysis of macroseismic data in SE Europe
    Name of institution: University of Southern California, School of Engineering
    City: Los Angeles, SAD


  1. Name: Prototip laserskog interferometarskog pretvornika relativnog pomaka
    Type of achievement: Prototypes
    Authors: Sović Ivica, Herak Marijan

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Last update: 09/29/95