Attenuation of broad-band (50-1500 Hz) seismic waves in granitic rocks near the Earth' surface

Détails

ID Serval
serval:BIB_9508FD622C80
Type
Article: article d'un périodique ou d'un magazine.
Collection
Publications
Titre
Attenuation of broad-band (50-1500 Hz) seismic waves in granitic rocks near the Earth' surface
Périodique
Geophysical Research Letters
Auteur(s)
Holliger K., Bühnemann 
ISSN-L
0094-8276
Statut éditorial
Publié
Date de publication
1996
Peer-reviewed
Oui
Volume
23
Pages
1981-1984
Langue
anglais
Résumé
We report Q-estimates from borehole-to-tunnel seismic experiments
at Nagra's ''Grimsel Test Site'' (GTS). The probed granitic rocks
are cut by brittle faults but do not show any signs of pervasive
weathering. Q-values estimated from P-wave first arrivals by the
spectral ratio and rise time methods range from about 20 to 60 with
a median value of 35 and a standard error of 20% or less. The surprisingly
low Q-values inferred indicate that even outside the weathering zone,
seismic attenuation in some parts of the uppermost crystalline crust
may be very high.
Création de la notice
25/11/2013 19:28
Dernière modification de la notice
03/03/2018 19:39
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