Publication Date:
2017-04-04
Description:
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.
Description:
Published
Description:
1525-1531
Description:
2T. Tettonica attiva
Description:
JCR Journal
Description:
restricted
Keywords:
Seismicity and tectonics
;
Dynamics: seismotectonics
;
Crustal structure
;
Europe
;
04. Solid Earth::04.07. Tectonophysics::04.07.05. Stress
Repository Name:
Istituto Nazionale di Geofisica e Vulcanologia (INGV)
Type:
article
