Quick
Search: 		  
advanced search
 GSW Home   GeoRef Home   My GSW Alerts   Contact GSW   About GSW   Journals List   Help 
Bulletin of the Seismological Society of America Don't get GSW? Talk to your librarian.
JOURNAL HOME HELP CONTACT PUBLISHER SUBSCRIBE ARCHIVE SEARCH TABLE OF CONTENTS
Bulletin of the Seismological Society of America; December 1997; v. 87; no. 6; p. 1413-1421
© 1997 Seismological Society of America
This Article
Right arrow Full Text (PDF)
Right arrow References
Right arrow Alert me when this article is cited
Right arrow Alert me if a correction is posted
Right arrow Citation Map
Services
Right arrow Email this article to a friend
Right arrow Similar articles in this journal
Right arrow Alert me to new issues of the journal
Right arrow Download to citation manager
Right arrow reprints & permissions
Citing Articles
Right arrow Citing Articles via HighWire
Right arrow Citing Articles via Google Scholar
Google Scholar
Right arrow Articles by Malagnini, L.
Right arrow Articles by Franco, R. d.
Right arrow Search for Related Content
GeoRef
Right arrow GeoRef Citation

Shear-wave velocity structure of sediments from the inversion of explosion-induced Rayleigh waves: Comparison with cross-hole measurements

Luca Malagnini, Robert B. Herrmann, Alessia Mercuri, Stefano Opice, Giancarlo Biella and Roberto de Franco

Istituto Nazionale di Geofisica, Via di Vigna Murata, 605, 00143 Rome, Italy
Saint Louis University, 3507 Laclede Ave., St. Louis, Missouri 63103
Istituto per la Ricerca sul Rischio Sismico—CNR, Via Bassini, 15, 20133 Milan, Italy

Abstract

Rayleigh waves generated by a 10-kg dynamite explosion were recorded along a dense, linear array of 47 seismic stations. The array had a total length of 1.4 km, and it was deployed on the sediments of the Po River floodplain near the city of Ferrara (Northern Italy).

The recorded signals were dominated by fundamental-mode Rayleigh waves. Several techniques, including multiple-filter analysis, phase velocity stacking, and single-station cross-correlation, were used to obtain group and phase velocity dispersion from subsets for the data set. Synthetic seismograms were computed for one velocity structure, showing a good match to the recorded waveforms. Late Rayleigh-wave codas were characterized by persistent, monochromatic ringing, interpreted as due to surface waves scattered by weak lateral heterogeneities. Scattering within the alluvium of the great Po River Valley likely occurred across a reticular system of ancient, secondary river beds. Compared to the rest of the floodplain, these preferential directions of local drainage are characterized by different sedimentary environments.

The availability of in situ, cross-hole measurements of shear-wave velocities allowed the comparison with our results from surface observations, demonstrating that the analysis of explosion-induced Rayleigh waves can be used for the geophysical characterization of flat-layered structures at a local scale for seismic engineering purposes.




This article has been cited by other articles:


Home page
 Bulletin of the Seismological Society of AmericaHome page
Seismic Attenuation and Shallow Velocity Structures at Stromboli Volcano, Italy
Bulletin of the Seismological Society of America, April 1, 2002; 92(3): 1102 - 1116.


Home page
 Bulletin of the Seismological Society of AmericaHome page
Analysis of Borehole Broadband Recordings: Test Site in the Po Basin, Northern Italy
Bulletin of the Seismological Society of America, December 1, 2000; 90(6): 1454 - 1463.


Home page
 Bulletin of the Seismological Society of AmericaHome page
Comparison of Phase Velocities from Array Measurements of Rayleigh Waves Associated with Microtremor and Results Calculated from Borehole Shear-Wave Velocity Profiles
Bulletin of the Seismological Society of America, June 1, 2000; 90(3): 666 - 678.



JOURNAL HOME HELP CONTACT PUBLISHER SUBSCRIBE ARCHIVE SEARCH TABLE OF CONTENTS
Copyright © 2009 by Seismological Society of America