Strong fast long-period waves in the Efpalio 2010 earthquake records: explanation in terms of leaking modes

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F14%3A10272312" target="_blank" >RIV/00216208:11320/14:10272312 - isvavai.cz</a>
Result on the web
<a href="http://dx.doi.org/10.1007/s10950-013-9402-3" target="_blank" >http://dx.doi.org/10.1007/s10950-013-9402-3</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1007/s10950-013-9402-3" target="_blank" >10.1007/s10950-013-9402-3</a>

Result language
angličtina
Original language name
Strong fast long-period waves in the Efpalio 2010 earthquake records: explanation in terms of leaking modes
Original language description
The January 18, 2010, shallow earthquake in the Corinth Gulf, Greece (M (w) 5.3) generated unusually strong long-period waves (periods 4-8 s) between the P and S wave arrival. These periods, being significantly longer than the source duration, indicateda structural effect. The waves were observed in epicentral distances 40-250 km and were significant on radial and vertical component. None of existing velocity models of the studied region provided explanation of the waves. By inverting complete waveforms, we obtained an 1-D crustal model explaining the observation. The most significant feature of the best-fitting model (as well as the whole suite of models almost equally well fitting the waveforms) is a strong velocity step at depth about 4 km. In theobtained velocity model, the fast long-period wave was modeled by modal summation and identified as a superposition of several leaking modes. In this sense, the wave is qualitatively similar to P long or Pnl waves, which however are usual
Czech name
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Czech description
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Type
J<sub>x</sub> - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)
CEP classification
DC - Seismology, volcanology and Earth structure
OECD FORD branch
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Project
<a href="/en/project/GAP210%2F11%2F0854" target="_blank" >GAP210/11/0854: Improving physical insight into the Mediterranean earthquakes</a><br>
Continuities
S - Specificky vyzkum na vysokych skolach

Publication year
2014
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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