SKS-wave splitting and upper mantle structure: results in the Southern Apennines
Shear wave splitting measures at six temporary stations in the Southern Apennines are computed analyzing fifteen events recorded during the spring and summer 1996, with magnitude greater than 5.8. The splitting parameters were measured using Silver and Chan's (1991) method only on SKS and SKKS...
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Istituto Nazionale di Geofisica e Vulcanologia (INGV)
1998-06-01
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Online Access: | http://www.annalsofgeophysics.eu/index.php/annals/article/view/3806 |
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doaj-813e18ec48fe47aaa52e6a5061d939312020-11-25T01:37:13ZengIstituto Nazionale di Geofisica e Vulcanologia (INGV)Annals of Geophysics1593-52132037-416X1998-06-0141410.4401/ag-3806SKS-wave splitting and upper mantle structure: results in the Southern ApenninesL. MargheritiShear wave splitting measures at six temporary stations in the Southern Apennines are computed analyzing fifteen events recorded during the spring and summer 1996, with magnitude greater than 5.8. The splitting parameters were measured using Silver and Chan's (1991) method only on SKS and SKKS phases. Evidence for strong seismic anisotropy was found at all the stations: delay times dt are generally larger than 1.5 s and fast directions Ø are quite variable in different geodynamic domains. NW-SE Ø average directions are found at stations on the mountain belt while at stations on the foredeep and foreland Ø is on average N-S. Changes in splitting parameters may be related to upper mantle structure, and particularly to the geometry of a fragmented lithosphere subducting beneath the Apennines.http://www.annalsofgeophysics.eu/index.php/annals/article/view/3806shear-wave splittingSKSupper mantle structuresouthern Apennines |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
L. Margheriti |
spellingShingle |
L. Margheriti SKS-wave splitting and upper mantle structure: results in the Southern Apennines Annals of Geophysics shear-wave splitting SKS upper mantle structure southern Apennines |
author_facet |
L. Margheriti |
author_sort |
L. Margheriti |
title |
SKS-wave splitting and upper mantle structure: results in the Southern Apennines |
title_short |
SKS-wave splitting and upper mantle structure: results in the Southern Apennines |
title_full |
SKS-wave splitting and upper mantle structure: results in the Southern Apennines |
title_fullStr |
SKS-wave splitting and upper mantle structure: results in the Southern Apennines |
title_full_unstemmed |
SKS-wave splitting and upper mantle structure: results in the Southern Apennines |
title_sort |
sks-wave splitting and upper mantle structure: results in the southern apennines |
publisher |
Istituto Nazionale di Geofisica e Vulcanologia (INGV) |
series |
Annals of Geophysics |
issn |
1593-5213 2037-416X |
publishDate |
1998-06-01 |
description |
Shear wave splitting measures at six temporary stations in the Southern Apennines are computed analyzing fifteen events recorded during the spring and summer 1996, with magnitude greater than 5.8. The splitting parameters were measured using Silver and Chan's (1991) method only on SKS and SKKS phases. Evidence for strong seismic anisotropy was found at all the stations: delay times dt are generally larger than 1.5 s and fast directions Ø are quite variable in different geodynamic domains. NW-SE Ø average directions are found at stations on the mountain belt while at stations on the foredeep and foreland Ø is on average N-S. Changes in splitting parameters may be related to upper mantle structure, and particularly to the geometry of a fragmented lithosphere subducting beneath the Apennines. |
topic |
shear-wave splitting SKS upper mantle structure southern Apennines |
url |
http://www.annalsofgeophysics.eu/index.php/annals/article/view/3806 |
work_keys_str_mv |
AT lmargheriti skswavesplittinganduppermantlestructureresultsinthesouthernapennines |
_version_ |
1725059055834103808 |