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Geoscientific Instrumentation, Methods and Data Systems An interactive open-access journal of the European Geosciences Union
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Volume 3, issue 2 | Copyright
Geosci. Instrum. Method. Data Syst., 3, 229-239, 2014
https://doi.org/10.5194/gi-3-229-2014
© Author(s) 2014. This work is distributed under
the Creative Commons Attribution 3.0 License.

  30 Oct 2014

30 Oct 2014

Determining the focal mechanisms of the events in the Carpathian region of Ukraine

A. Pavlova, O. Hrytsai, and D. Malytskyy A. Pavlova et al.
  • Carpathian Branch of the Institute of Geophysics named after S. I. Subbotin NAS of Ukraine, Lviv, Ukraine

Abstract. The modification of the matrix method for constructing the displacement field on the free surface of an anisotropic layered medium is presented. The source of seismic waves is modelled by a randomly oriented force and seismic tensor. A trial and error method is presented for solving the inverse problem of determining parameters of the earthquake source. A number of analytical and numerical approaches to determining the earthquake source parameters, based on the direct problem solutions, are proposed. The focal mechanisms for the events in the Carpathian region of Ukraine are determined by the graphical method. The theory of determination of the angles of orientation of the fault plane and the earthquake's focal mechanism are presented. The focal mechanisms obtained by two different methods are compared.

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The paper is devoted to mathematical modelling of propagation of seismic waves in inhomogeneous media. The trial and error method for determining the angles of orientation of fault plane and earthquake mechanism has been proposed. The graphic and trial and error approaches have been applied for determining the source parameters of earthquakes in the seismically active region of eastern Carpathian.
The paper is devoted to mathematical modelling of propagation of seismic waves in inhomogeneous...
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