PRELIMINARY SHEAR-WAVE SPLITTING RESULTS IN THE BROADER AIGION AREA (GREECE) DURING 2013


Δημοσιευμένα: Jul 27, 2016
Λέξεις-κλειδιά:
σεισμική ανισοτροπία Κορινθιακός Κόλπος σμηνοσειρά
G. Kaviris
I. Spingos
V. Kapetanidis
P. Papadimitriou
Περίληψη

Τις προηγούμενες δύο δεκαετίες έχει παρατηρηθεί ότι ο φλοιός στον Δ. Κορινθιακό Κόλπο παρουσιάζει το φαινόμενο της ανισοτροπίας με δυνητικά μεταβαλλόμενες ιδιότητες. Κατά το 2013, η εκδήλωση έντονης σεισμικότητας, συμπεριλαμβανομένης της σμηνοσειράς μεταξύ Μαΐου και Αυγούστου, σε συνδυασμό με την ύπαρξη τοπικών σεισμολογικών δικτύων, αποτέλεσε έναυσμα για τη διεξαγωγή της παρούσας μελέτης. Το Ενιαίο Εθνικό Δίκτυο Σεισμογράφων (ΕΕΔΣ) και το Corinth Rift Laboratory Network (CRLN) έχουν καταγράψει μεγάλο πλήθος δεδομένων στη διάρκεια εκδήλωσης του φαινομένου. Κατά τη διάδοση των εγκαρσίων κυμάτων σε ένα ανισοτροπικό μέσο, λαμβάνει χώρα το φαινόμενο της σχάσης, με αποτέλεσμα η διάδοση αυτών να μπορεί να χαρακτηρίζεται από δύο διακριτές συνιστώσες: την ταχεία (Sfast) και τη βραδεία (Sslow), η οποία καταγράφεται από τον σταθμό σε ύστερη χρονική στιγμή. Κύριο αίτιο του φαινομένου αυτού αποτελεί η ύπαρξη μικρορωγμών στον ανώτερο φλοιό. Οι σύγχρονες εξελίξεις στη σεισμολογία και τη γεωφυσική έχουν καταστήσει τη μελέτη της σχάσης των εγκαρσίων κυμάτων ως ένα πολύτιμο εργαλείο για τον προσδιορισμό των ιδιοτήτων ανισοτροπικών μέσων. Η παρούσα μελέτη παρουσιάζει αποτελέσματα για 8 σταθμούς από ένα σύνολο 535 αναλυθέντων σεισμών, τα οποία συμφωνούν με τα μοντέλα ανισοτροπίας EDA και APE.

Λεπτομέρειες άρθρου
  • Ενότητα
  • Γεωφυσική και Σεισμολογία
Λήψεις
Τα δεδομένα λήψης δεν είναι ακόμη διαθέσιμα.
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