P and S-wave compatible crustal models for the western Ionian basin
Main Article Content
Abstract
We assume a four layers stratified crustal model with homogeneous layers and
spherical simmetry for the earth's crust of the Western Ionian basin like a similar
crustal model formerly proposed for the Southern Tyrrenian basin and the Messina
Straits area.
To define the P-wave velocity in the upper layer of the model we analize the
travel-times of the 7"-waves produced by shots fired in the region concerned. Such
waves are recorded in different and conveniently grouped seismic stations. The
observed travel-times are essential to define the P-phase refracted at the base of the
first crustal layer of the model and subsequently the following refracted phases.
The thickness of the layers and the corrispondent velocities are calculated by
determining the 8 / , and S A,- contributions (travel-time and angular distance)
following the relation relative to the seismic parameter p{:
S , a ; = 2 2, - S / , - 2 p i 2,8A,.
where a, is the intercepted time of the observed travel-time curve. A similar
procedure allows to define a crustal model also for S-waves.
Finally the elastic constants p., K, rs and p density in the crustal layers are
calculated.
spherical simmetry for the earth's crust of the Western Ionian basin like a similar
crustal model formerly proposed for the Southern Tyrrenian basin and the Messina
Straits area.
To define the P-wave velocity in the upper layer of the model we analize the
travel-times of the 7"-waves produced by shots fired in the region concerned. Such
waves are recorded in different and conveniently grouped seismic stations. The
observed travel-times are essential to define the P-phase refracted at the base of the
first crustal layer of the model and subsequently the following refracted phases.
The thickness of the layers and the corrispondent velocities are calculated by
determining the 8 / , and S A,- contributions (travel-time and angular distance)
following the relation relative to the seismic parameter p{:
S , a ; = 2 2, - S / , - 2 p i 2,8A,.
where a, is the intercepted time of the observed travel-time curve. A similar
procedure allows to define a crustal model also for S-waves.
Finally the elastic constants p., K, rs and p density in the crustal layers are
calculated.
Article Details
How to Cite
1.
BOTTARI A, FEDERICO B. P and S-wave compatible crustal models for the western Ionian basin. Ann. Geophys. [Internet]. 1982Nov.25 [cited 2023Dec.4];35(1):121-46. Available from: https://www.annalsofgeophysics.eu/index.php/annals/article/view/4674
Issue
Section
OLD
Open-Access License
No Permission Required
Istituto Nazionale di Geofisica e Vulcanologia applies the Creative Commons Attribution License (CCAL) to all works we publish.
Under the CCAL, authors retain ownership of the copyright for their article, but authors allow anyone to download, reuse, reprint, modify, distribute, so long as the original authors and source are cited. No permission is required from the authors or the publishers.
In most cases, appropriate attribution can be provided by simply citing the original article.
If the item you plan to reuse is not part of a published article (e.g., a featured issue image), then please indicate the originator of the work, and the volume, issue, and date of the journal in which the item appeared. For any reuse or redistribution of a work, you must also make clear the license terms under which the work was published.
This broad license was developed to facilitate open access to, and free use of, original works of all types. Applying this standard license to your own work will ensure your right to make your work freely and openly available. For queries about the license, please contact ann.geophys@ingv.it.