Please use this identifier to cite or link to this item:
http://hdl.handle.net/2122/2437
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 | Journal: | Geophys. Res. Lett. | Series/Report no.: | /31 (2004) | Publisher: | AGU | Issue Date: | 2004 | DOI: | 10.1029/2004GL021194 | Keywords: | suboceanic Rayleigh waves | Subject Classification: | 04. 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: | Article published / in press |
Files in This Item:
File | Description | Size | Format | Existing users please Login |
---|---|---|---|---|
Rovellietal_GRL2004.pdf | 520.37 kB | Adobe PDF |
WEB OF SCIENCETM
Citations
50
6
checked on Feb 10, 2021
Page view(s) 20
330
checked on Apr 17, 2024
Download(s)
17
checked on Apr 17, 2024