Please use this identifier to cite or link to this item:
Authors: Rovelli, A.* 
Vuan, A.* 
Mele, G.* 
Priolo, E.* 
Boschi, E.* 
Title: Rarely observed short-period (5-10 s) suboceanic Rayleigh waves propagating across the Tyrrhenian Sea
Issue Date: 2004
Series/Report no.: /31 (2004)
DOI: 10.1029/2004GL021194
Keywords: suboceanic Rayleigh waves
Subject Classification04. Solid Earth::04.06. Seismology::04.06.09. Waves and wave analysis 
Abstract: Shallow earthquakes occurring in the southern part of the Tyrrhenian basin excite a long-duration low-frequency coda that propagates efficiently along paths crossing the Tyrrhenian Sea. Seismograms recorded at regional distances in the Italian peninsula are analysed in the frequency-time domain and compared with synthetics computed in simple vertically varying media. Based on results of our modeling, we interpret the coda as short-period (5-10 s) suboceanic Rayleigh waves. Their large amplitude and long duration, that we emphasize here, are explained as due to the influence of the Tyrrhenian water layer over a fast seafloor with little S-wave attenuation (QS> 300). A satisfactory fit of amplitude and duration of the observed waveforms is obtained assuming a young oceanic model with an average water column of 1 to 2 km and relatively high S-wave velocity (2.5 km/s) in the shallow crust.
Appears in Collections:Papers Published / Papers in press

Files in This Item:
File Description SizeFormat 
Rovellietal_GRL2004.pdf520.37 kBAdobe PDFView/Open
Show full item record

Page view(s)

Last Week
Last month
checked on Jul 20, 2018


checked on Jul 20, 2018

Google ScholarTM