Specification of mechanisms of earthquake sources in the Carpathian region

Authors

  • D. V. Malitskiy Carpathian Branch of the S.I. Subbotin Institute of Geophysics of the National Academy of Sciences of Ukraine, Lviv, Ukraine
  • O. D. Gritsay Carpathian Branch of the S.I. Subbotin Institute of Geophysics of the National Academy of Sciences of Ukraine, Lviv, Ukraine
  • O. O. Muyla Carpathian Branch of the S.I. Subbotin Institute of Geophysics of the National Academy of Sciences of Ukraine, Lviv, Ukraine
  • O. I. Kutniv Carpathian Branch of the S.I. Subbotin Institute of Geophysics of the National Academy of Sciences of Ukraine, Lviv, Ukraine
  • E. M. Kozlovskiy Carpathian Branch of the S.I. Subbotin Institute of Geophysics of the National Academy of Sciences of Ukraine, Lviv, Ukraine

DOI:

https://doi.org/10.24028/gzh.0203-3100.v36i4.2014.116032

Keywords:

earthquake source, graphic method, seismic wave, anisotropic medium

Abstract

One of the urgent problems - a solution of the focal mechanism of an earthquake is considered. On the example of several events occurred in the Carpathian region of Ukraine, the solving of this problem with a graphic method is proposed. This method is based on identifying the best location option of nodal planes relatively to both the fuzzy P-wave arrivals and the values of the logarithm of the ratio of the S-wave amplitude to the P-wave amplitude. A sequence of plotting diagrams for determining the focal mechanism is presented. The focal mechanisms and types of faults are determined by using this method for 6 events occurred in the Transcarpathian region. The similarity of the focal mechanisms for repeated earthquakes is shown. The dynamic parameters of the sources of 4 earthquakes occurred in 2012-2013 are retrieved by using data from the spectra of records converted into displacements according to the Brune model.

References

Adamova P., Sokos E., Zahradnik J., 2009. Problematic non-double-couple mechanism of the 2002 Amfilochia Mw5 earthquake, Western Greece. J. Seismol. (13), 1—12.

Aki K., Richards P, 1983. Quantitative Seismology. Theory and Methods. Moscow: Mir, 520 p. (in Russian).

Balakina L. M., Vvedenskaya A. V., Golubeva N. V., Misharina L. A., Shirokova E. I., 1972. Elastic stress field of the Earth and earthquake focal mechanisms. Moscow: Nauka, 198 p. (in Russian).

Baumbach M., Bormann P., 2011. New Manual of Seis- mological Observatory Practice. Determination of source parameters from seismic spectra. Potsdam: Deutsches GeoForschungsZentrum GFZ. doi: 10.2312/GFZ.NMSOP-2_EX_3.4

ChekunovA. V., Livanova L. P., Geyko V S., 1969. Deep structure of the crust and some features of tectonics Transcarpathian deflection. Sovetskaya geologiya (10), 57—69 (in Russian).

Cronin V., 2004. A Draft Primer on Focal Mechanism Solutions for Geologists. Baylor University.

EbelJ. E., BonjerK. P, 1990. Moment tensor inversion of small earthquakes in southwestern Germany for the fault plane solution. Geophys. J. Int. (101), 133—146.

Hardebeck J. L., Shearer P M., 2003. Using S/P Amplitude Ratios to Constrain the Focal Mechanisms of Small Earthquakes. Bull. Seismol. Soc. Amer. 93(6), 2434—2444.

Havskov J., Ottemoller L., 2010. Routine Data Processing in Earthquake Seismology. With Sample Data, Exercises and Software, Springer Science+Business Media B.V., 347 p. doi:10.1007/978-90-481-8697-6_1.

ISC Bulletin. http://www.isc.ac.uk/

Kasahara K., 1985. Earthquake mechanism. Moscow: Mir, 264 p. (in Russian).

Malytskyy D., Hrytsai O., Muyla O., 2013. The features of the construction of the focal mechanisms of local earthquakes using the example of an event near Beregovo 23.11.2006 (9=48,2°, k=22,52°, h=12,3 km, MD=4,2). Visnik Kyiv. universitetu. Geologiya B1(60), 37—42 (in Ukranian).

Pustovitenko B. G., Merzhey E. A., Pustovitenko A. A., 2013. Dynamic parameters of earthquake sources of the Crimea according to the data of digital seismic stations Geofizicheskij zhurnal 35 (5), 172—186 (in Russian).

Pustovitenko B. G., Panteleyeva T. A., 1990. Spectral and focal parameters of earthquakes in the Crimea. Kiev: Naukova Dumka, 252 p. (in Russian).

Seismological Bulletin of Ukraine for 2006. (Ed. B. G. Pustovitenko), 2008. Sevastopol: NPC «Ecosy- Hydrophysica», 295 p. (in Russian).

Sule B., 2010. Spectral source parameters for weak local earthquakes in the Pannonian basin. Cent. Eur. J. Geosci. 2(4), 475—480. doi: 10.2478/v10085-010- 0018-3.

Toth L., Monus P, Zsiros T., Bus Z, Kiszely M., Czifra T., 2007. Hungarian Earthquake Bulletin 2006. GeoRisk MTA GGKI, Budapest, 80 p.

Voronina E. V., 2004. Mechanics of earthquake source. Special course. Moscow: Faculty of Physics MSU Publ., 92 p. (in Russian).

Downloads

Published

2014-08-01

How to Cite

Malitskiy, D. V., Gritsay, O. D., Muyla, O. O., Kutniv, O. I., & Kozlovskiy, E. M. (2014). Specification of mechanisms of earthquake sources in the Carpathian region. Geofizicheskiy Zhurnal, 36(4), 118–135. https://doi.org/10.24028/gzh.0203-3100.v36i4.2014.116032

Issue

Vol. 36 No. 4 (2014)

Section

Articles

License

Copyright (c) 2020 Geofizicheskiy Zhurnal

Creative Commons License

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

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

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

2. 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.

3. Authors are permitted and encouraged to post their work online (e.g., 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 (See The Effect of Open Access).