Publication Date:
2021-03-02
Description:
On 30 October 1930, an Mw 5.8 earthquake hit the northern Marche coastal
area (central Italy), causing significant damage (I0 VIII–IX degree Mercalli–Cancani–
Sieberg) along a 40 km stretch of the Adriatic coast between Pesaro and Ancona, centered
on the town of Senigallia. This area is characterized by relatively infrequent and
moderate-sized earthquakes and by elusive active faults. In spite of the presence of wellknown
northwest–southeast-trending, northeast-verging fault-propagation folds forming
the outer thrusts of the Apennines, the current level of activity, and the kinematics of
these coastal structures are still controversial.
We present a multidisciplinary analysis of the source of the 30 October 1930 Senigallia
earthquake, combining instrumental and macroseismic data and elaborations
with available evidence from geological and tectonic investigations.We determine the
main seismic parameters of the source, including the earthquake location, its magnitude,
and, for the first time, its focal mechanism, providing the first instrumental
evidence for thrust faulting along the northern Marche coastal belt.
Our findings provide conclusive evidence for the current activity of the northern
Marche coastal thrusts. As such they have significant implications for the seismic
hazard of the area, a densely populated region that hosts historical heritage, tourism
facilities, industrial districts, and key transportation infrastructures.
Description:
Published
Description:
1548-1561
Description:
2T. Tettonica attiva
Description:
JCR Journal
Description:
reserved
Keywords:
1930 Senigallia earthquake
;
seismogenic source
;
Northern Marche
;
Thrust fault
;
Focal mechanism
;
04. Solid Earth::04.06. Seismology::04.06.03. Earthquake source and dynamics
Repository Name:
Istituto Nazionale di Geofisica e Vulcanologia (INGV)
Type:
article
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