Spectral characteristics of earthquakes along plate boundaries
Item
Title (Dublin Core)
eng
Spectral characteristics of earthquakes along plate boundaries
hrv
Spektralna svojstva potresa na dodiru tektonskih ploča
Description (Dublin Core)
eng
Earthquakes are investigated with epicentres located along divergent and along convergent plate boundaries. Two criteria are applied in order to distinguish between earthquakes featuring anomalous “long-periodic” and “short-periodic” radiation of body-waves: 1) deviation of the corner period Tc of the P-waves from the regression between Tc and the moment magnitude Mw; and 2) the values of stress drop Dsigma.
It is found that earthquakes along divergent boundaries radiate the seismic energy mainly at longer periods, and, vice versa, that such along convergent boundaries radiate energy mainly at shorter periods. The average stress drop for the former earthquakes is estimated thereby to be 33 bars and for latter – 89 bars.
In a regional scale, for earthquakes in the Japan-Kuril area it is found that the corner periods for strike-slip events are larger than those for thrust events. The results confirm the findings of investigations based on the creepex distribution along divergent and convergent boundaries, as well as the findings related to the dependence of creepex on the source mechanism.
It is found that earthquakes along divergent boundaries radiate the seismic energy mainly at longer periods, and, vice versa, that such along convergent boundaries radiate energy mainly at shorter periods. The average stress drop for the former earthquakes is estimated thereby to be 33 bars and for latter – 89 bars.
In a regional scale, for earthquakes in the Japan-Kuril area it is found that the corner periods for strike-slip events are larger than those for thrust events. The results confirm the findings of investigations based on the creepex distribution along divergent and convergent boundaries, as well as the findings related to the dependence of creepex on the source mechanism.
hrv
Proučavani su potresi na konvergentnim i divergentnim mjestima dodira tektonskih ploča. Potresi karakterizirani anomalno dugoperiodičkom odnosno kratkoperiodičkom radijacijom prostornih valova razlučeni su na osnovi devijacije graničnog perioda Tc P-valova (regresijom Tc i momentne magnitude Mw), te razmatranjem iznosa pada napetosti na rasjedu, Dsigma. Ustanovljeno je da potresi na konvergentnim granicama zrače seizmičku energiju uglavnom na duljim periodima nego oni na divergentnim granicama. Prosječni pad napetosti za potrese duž konvergentnih granica iznosi 33 bara, a za one na divergentnim
89 bara.
Na području Japana i Kurilskih otoka »strike-slip« potresi imaju veći granični period od »dip-slip« potresa. Rezultati su u skladu s istraživanjima creepex razdiobe duž konvergentnih i divergentnih granica, kao i ovisnosti creepex-a o žarišnom mehanizmu.
89 bara.
Na području Japana i Kurilskih otoka »strike-slip« potresi imaju veći granični period od »dip-slip« potresa. Rezultati su u skladu s istraživanjima creepex razdiobe duž konvergentnih i divergentnih granica, kao i ovisnosti creepex-a o žarišnom mehanizmu.
Creator (Dublin Core)
Lyskova, E. L.
Yanovskaya, T. B.
Duda, S.J.
Subject (Dublin Core)
eng
Seismic moment; corner period; principle of self-similarity; stress drop, focal mechanism
hrv
seizmički moment; osnove samosličnosti, žarišni mehanizam
Publisher (Dublin Core)
Andrija Mohorovicic Geophysical Institute
Date (Dublin Core)
1998
Type (Dublin Core)
text
info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
Format (Dublin Core)
application/pdf
Identifier (Dublin Core)
https://hrcak.srce.hr/17772
eng
https://hrcak.srce.hr/file/27539
Source (Dublin Core)
Geofizika
ISSN 0352-3659 (Print)
ISSN 1846-6346 (Online)
Volume 15
Issue 1
Language (Dublin Core)
eng
Rights (Dublin Core)
info:eu-repo/semantics/openAccess
All manuscripts published on-line are subject to Creative Commons Attribution-NonCommercial 4.0 International License which permits users to read, download, copy, redistribute, print, search, or link to the full texts of these articles in any medium or format. Also, users can remix, transform and build upon the material, provided the original work is properly cited and any changes properly indicated. They may not use the material for commercial purposes.
By submitting a manuscript, the author accepts the application of the Creative Commons Attribution-NonCommercial 4.0 International License.
By submitting a manuscript, the author accepts the application of the Creative Commons Attribution-NonCommercial 4.0 International License.