Options
The new release of the Italian contemporary stress map
Language
English
Obiettivo Specifico
2T. Tettonica attiva
Status
Published
JCR Journal
JCR Journal
Peer review journal
Yes
Title of the book
Issue/vol(year)
/205 (2016)
ISSN
0956-540X
Electronic ISSN
1365-246X
Publisher
Oxford University Press
Pages (printed)
1525-1531
Issued date
March 17, 2016
Alternative Location
Abstract
We provide an updated present-day stress map for the Italian territory. Following the World
Stress Map (WSM) Project guidelines, we list the different stress indicators, explaining the
criteria used to select data. We discuss the data, which will also be included in the 2016
release of the WSM, highlighting the areas for which we have added stress information. Our
map displays the minimum horizontal stress orientations inferred from crustal stress indicators
down to 40 km depth using data of A–C quality, updated for earthquakes until December 2015.
We have completely reviewed all data, and the data set now contains 855 entries, in contrast
to the previous 715. The number of data with A–C quality of 630 corresponds to an increase
of 26 per cent relative to the previous data set. In particular, the new data set contains the
results of the analysis of borehole breakouts, critically reviewed data from earthquake focal
mechanisms, data concerning active faults, formal inversions of focal mechanisms of seismic
sequences or of restricted areas and one stress determination from overcoring. The new data
set defines the stress field in areas not well covered by the previous data: the region north to
the Po Plain and the central Adriatic sea, both characterized by a thrust- and strike-faulting
regime, the northern Sicilian belt with a prevailing normal-faulting regime, and the Ionian sea
with a strike-slip regime.
Stress Map (WSM) Project guidelines, we list the different stress indicators, explaining the
criteria used to select data. We discuss the data, which will also be included in the 2016
release of the WSM, highlighting the areas for which we have added stress information. Our
map displays the minimum horizontal stress orientations inferred from crustal stress indicators
down to 40 km depth using data of A–C quality, updated for earthquakes until December 2015.
We have completely reviewed all data, and the data set now contains 855 entries, in contrast
to the previous 715. The number of data with A–C quality of 630 corresponds to an increase
of 26 per cent relative to the previous data set. In particular, the new data set contains the
results of the analysis of borehole breakouts, critically reviewed data from earthquake focal
mechanisms, data concerning active faults, formal inversions of focal mechanisms of seismic
sequences or of restricted areas and one stress determination from overcoring. The new data
set defines the stress field in areas not well covered by the previous data: the region north to
the Po Plain and the central Adriatic sea, both characterized by a thrust- and strike-faulting
regime, the northern Sicilian belt with a prevailing normal-faulting regime, and the Ionian sea
with a strike-slip regime.
Type
article
File(s)
No Thumbnail Available
Name
Geophys. J. Int.-2016-Montone-1525-31.pdf
Size
1.49 MB
Format
Adobe PDF
Checksum (MD5)
f148a2f4c79603dfe914d6c355f225e6