KIT | KIT-Bibliothek | Impressum | Datenschutz

P-wave scattering and the distribution of heterogeneity around Etna Volcano

Zieger, Toni 1; Sens-Schönfelder, Christoph; Ritter, Joachim R. R. 1; Lühr, Birger-Gottfried; Dahm, Torsten
1 Geophysikalisches Institut (GPI), Karlsruher Institut für Technologie (KIT)

Abstract:

Volcanoes and fault zones are areas of increased heterogeneity in the Earth crust that leads to strong scattering of seismic waves. For the understanding of the volcanic structure and the role of attenuation and scattering
processes it is important to investigate the distribution of heterogeneity. We used the signals of air-gun shots to investigate the distribution of heterogeneity around Mount Etna. We devise a new methodology that is based on the coda energy ratio which we define as the ratio between the energy of the direct P-wave and the energy in a later coda window. This is based on the basic assumption that scattering caused by heterogeneity removes energy from the direct P-waves. We show that measurements of the energy ratio are stable with respect to changes of the details
of the time windows definitions. As an independent proxy of the scattering strength along the ray path we measure the peak delay time of the direct P-wave. The peak delay time is well correlated with the coda energy ratio. We project the observation in the directions of the incident rays at the stations. Most notably is an area with increased wave scattering in the volcano and east of it. ... mehr


Volltext §
DOI: 10.5445/IR/1000060591
Originalveröffentlichung
DOI: 10.4401/ag-7085
Scopus
Zitationen: 7
Web of Science
Zitationen: 7
Dimensions
Zitationen: 5
Cover der Publikation
Zugehörige Institution(en) am KIT Geophysikalisches Institut (GPI)
KIT-Zentrum Klima und Umwelt (ZKU)
Publikationstyp Zeitschriftenaufsatz
Publikationsjahr 2016
Sprache Englisch
Identifikator ISSN: 1593-5213
urn:nbn:de:swb:90-605911
KITopen-ID: 1000060591
Erschienen in Annals of geophysics
Band 59
Heft 4
Seiten S0432
Nachgewiesen in Dimensions
Scopus
Web of Science
KIT – Die Forschungsuniversität in der Helmholtz-Gemeinschaft
KITopen Landing Page