Determination of the shear wave velocities by the method microtremor on EuroseisTest
Résumé
The knowledge of the underground structure is a very important parameter for site effects and the estimation of spatial variation of ground motion. In the present study the S-wave model is determined by recordings of ambient noise at a circular array. The method that is used is Spatial Autocorrelation Coefficient (S.P.A.C.)(Aki, 1957, 1965). Since it is the first time that the specific method is being applied in Greece is provided a detailed and critical description of the method. The S.P.A.C. method is based on the assumption that microtremor is a stationary random function. In case microtremor is stationary in time and space, then the spatial autocorrelation coefficient is calculated, from which phase velocities of surface waves are estimated and S-wave velocities are inverted. The S.P.A.C. method is applied to S5 position of EuroseisTest where the underground structure is well determined from other geophysical methods while it is considered as a suitable place for the validation of the method. The validation indicates that the S-wave velocity structure determined by recordings of ambient noise at circular arrays is a useful tool for site characterization.
Article Details
- Comment citer
-
ΑΠΟΣΤΟΛΙΔΗΣ Π., ΡΟΥΜΕΛΙΩΤΗ Ζ., ΡΑΠΤΑΚΗΣ Δ., & ΠΙΤΙΛΑΚΗΣ Κ. (2001). Determination of the shear wave velocities by the method microtremor on EuroseisTest. Bulletin of the Geological Society of Greece, 34(4), 1277–1284. https://doi.org/10.12681/bgsg.17214
- Rubrique
- Geophysics
Ce travail est disponible sous licence Creative Commons Attribution - Pas d’Utilisation Commerciale 4.0 International.
Authors who publish with this journal agree to the following terms:
Authors retain copyright and grant the journal right of first publication with the work simultaneously licensed under a Creative Commons Attribution Non-Commercial License that allows others to share the work with an acknowledgement of the work's authorship and initial publication in this journal.
Authors are able to enter into separate, additional contractual arrangements for the non-exclusive distribution of the journal's published version of the work (e.g. post it to an institutional repository or publish it in a book), with an acknowledgement of its initial publication in this journal. Authors are permitted and encouraged to post their work online (preferably in institutional repositories or on their website) prior to and during the submission process, as it can lead to productive exchanges, as well as earlier and greater citation of published work.
