Publication Date:
2017-04-04
Description:
We computed receiver functions of teleseismic events that occurred within a distance of 35–90° and were recorded in central
Italy by 15 temporary stations and 1 permanent station. In the receiver functions we identified the P-to-S phase converted at the
Moho discontinuity beneath each station and estimated crustal thickness from the time delay of this phase with respect to the direct
P arrival. For the temporary stations this relatively simple approach is justified given their limited recording period. To the
permanent station we also applied the slant stacking technique to try to constrain the bulk crustal Vp/Vs and validate our estimate
of crustal thickness. Our results show that, in central Italy, the Moho is shallow (∼22 km) beneath the Tyrrhenian margin of the
peninsula and deepens toward the east. Beneath the central Apennines, Moho depth ranges from 39 to 47 km. The thickest crust
matches the highest topography. At the Tremiti islands, in the Adriatic Sea, crustal thickness is 33 km. While our Moho depths
beneath the Tyrrhenian side of the peninsula and the Adriatic Sea are in agreement with previous results, a new result of this study
is the crustal thickening beneath the central Apennines. This leads to the conclusion that the central Apennine topography is
supported by a significant crustal root.
Description:
Published
Description:
425-435
Description:
JCR Journal
Description:
reserved
Keywords:
teleseismic receiver functions
;
crustal thickness
;
central Apennines
;
Italy
;
04. Solid Earth::04.06. Seismology::04.06.99. General or miscellaneous
Repository Name:
Istituto Nazionale di Geofisica e Vulcanologia (INGV)
Type:
article
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