Powiadomienia systemowe
- Sesja wygasła!
- Sesja wygasła!
- Sesja wygasła!
- Sesja wygasła!
Tytuł artykułu
Autorzy
Identyfikatory
Warianty tytułu
Języki publikacji
Abstrakty
Rotation and twist waves recorded in Hokkaido (Japan), Ojców and Książ (Poland) and L'Aquila (Italy) bring a new insinght into the features of these motions for volcanic, mining and tectonic events. The rotation seismograph system used at the observatories in Hokkaido differs from that observatories in Poland and Italy. Nevertheless, the results obtained, for all observatories, are compatible. The levels of rotation and twist motions depend distinctly on the back-ground properties of the recording sited. Moreover, at a given recording station we have noticed two different levels of these motions; for some near events the records indicate very small rotation motions, while for other, also near events, these motions are distinctly greater and remain on a similar level as those for records from the distant sources. For the near events the evident differences in magnitudes and character of these motions suggest a distinct relation between the rotation and twist motions and the source mechanism. Similarly, an analysis of records for the volcanic events indicates existence of two kinds of events: for the first group, the rotation components reach the order of magnitude much greater than those for the group, for which the rotation and twist motions are quite negligible. The records related to this group, representing probably the near-surface volcanic explosions, confirm at the same time the reliability of results obtained for the rotation motions belonging to the first group, as the technique of recording and distances remain for both groups the same. The records from several stations give grounds for searching for as influence local structure on rotation and twist motions. The data treatment applied for local events made it possible to separate the recorded motions into the micromorphic and source related parts.
Wydawca
Czasopismo
Rocznik
Tom
Strony
409--431
Opis fizyczny
Bibliogr. 17 poz.
Twórcy
autor
- Institute of Geophysics, Polish Academy of Sciences, ul. Księcia Janusza 64, 01-452 Warszawa, Poland
autor
- Institute of Geophysics, Polish Academy of Sciences, ul. Księcia Janusza 64, 01-452 Warszawa, Poland
autor
- Division of Earth and Planetary Sciences, Graduate School of Sciences Hokkaido University, Sapporo, Japan
autor
- Instituto Naziolane di Seismologia e Volcanologia L'Aquila Oseratorio, L' Aquila, Italy
Bibliografia
- 1. Moriya, T., and R. Marumo, 1998, Design for rotation seismometers and their calibration, Geophys. Bull. Hokkaido Univ. 61, 99-106.
- 2. Moriya, T., and R. Teisseyre, 1999, Seismic rotation waves recorded from the Usu volcanic events, Japan, Acta Geophys. Pol. 47, 351-362.
- 3. Nagahama, H., and R. Teisseyre, 2001, Seismic rotation waves: dislocations and disclinations in a micromorphic continuum, Acta Geophys. Pol. 49, 120-129.
- 4. Nowożyński, K., and K.P. Teisseyre, 2003, Time-domain filtering of seismic rotation waves, Acta Geophys. Pol. 51, 51-61.
- 5. Shimbo, M., 1975, A geometrical formulation of asymmetric features in plasticity, Bull. Fac. Eng., Hokkaido Univ. 77, 155-159.
- 6. Shimbo, M., 1995, Non-Riemannian geometrical approach to deformation andfriction. In: R. Teisseyre (ed.), "Theory of Earthquake Premonitory and Fracture Processes", Polish Scientific Publishers, Warszawa, 520-528.
- 7. Shimbo, M., and M. Kawaguchi, 1976, A note on the asymmetric fields, Bull. Fac. Eng., Hokkaido Univ. 80, 75-79 (in Japanese).
- 8. Takeo, M., and H.M. Ito, 1997, What can be learned from rotational motions excited by earthquakes? Geophys. J. Int. 129, 319-329.
- 9. Teisseyre, R., 1973, Earthquake processes in a micromorphic continuum, Pure Appl. Geophys. 102, l, 15-28.
- 10. Teisseyre, R., 1974, Symmetric micromorphic/thinspace continuum: wave propagation, point source solutions and some applications to earthquake processes. In: P. Thoft -Christensen (ed.), "Continuum Mechanics Aspects of Geodynamics and Rock Fracture Mechanics", NATO Advanced Study Institute Series, D. Reidel Publ. Comp., Dordrecht-Holland/Boston, USA, 201-244.
- 11. Teisseyre, R., 1995, Symmetric micromorphic theory; applications to seismology. In: R. Teisseyre (ed.), "Theory of Earthquake Premonitory and Fracture Processes", Polish Scientific Publishers, Warszawa, 616-627.
- 12. Teisseyre, R., 1997, Dislocation-stress relations and evolution of dislocation fields, Acta Geophys. Pol. 45, 205-214.
- 13. Teisseyre, R., 2001, Evolution, propagation and diffusion of dislocation fields. In: R. Teisseyre and E. Majewski (eds.), "Earthquake Thermodynamics and Phase Transformations in the Earth’s Interior", vol. 76 of International Geophysical Series, Academic Press, San Diego-Tokyo, 167-198.
- 14. Teisseyre, R., 2002, Continuum with defect and self-rotation fields, Acta Geophys. Pol. 50, 51-68.
- 15. Teisseyre, R., and W. Boratyński, 2002, Continuum with self-rotation nuclei: Evolution of defect fields and equations of motion, Acta Geophys. Pol. 50, 223-230.
- 16. Teisseyre, R., and H. Nagahama, 1999, Microinertia continuum: Rotations and semi-waves, Acta Geophys. Pol. 47, 259-272.
- 17. Teisseyre, R., J. Suchcicki and K.P. Teisseyre, 2003, Recording the seismic rotation waves: reliability analysis, Acta Geophys. Pol. 51, 37-50.
Typ dokumentu
Bibliografia
Identyfikator YADDA
bwmeta1.element.baztech-article-BSL7-0007-0056