The Source of the 30 October 1930Mw 5.8 Senigallia (Central Italy) Earthquake: A Convergent Solution from Instrumental, Macroseismic, and Geological Data

• DOI: 10.1785/0120140263
• Publication Date: 2015-05-20T22:51:27Z
• Authors: Paola Vannoli; Gianfranco Vannucci; Fabrizio Bernardi; Barbara Palombo; Graziano Ferrari
• Keywords: 01 natural sciences; 0105 earth and related environmental sciences

Abstract On 30 October 1930, an M w 5.8 earthquake hit the northern Marche coastal area (central Italy), causing significant damage ( I 0 VIII–IX degree Mercalli–Cancani–Sieberg) along a 40 km stretch of Adriatic coast between Pesaro and Ancona, centered on town Senigallia. This is characterized by relatively infrequent moderate‐sized earthquakes elusive active faults. In spite presence well‐known northwest–southeast‐trending, northeast‐verging fault‐propagation folds forming outer thrusts Apennines, current level activity, kinematics these structures are still controversial. We present multidisciplinary analysis source 1930 Senigallia earthquake, combining instrumental macroseismic data elaborations with available evidence from geological tectonic investigations. determine main seismic parameters source, including location, its magnitude, and, for first time, focal mechanism, providing thrust faulting belt. Our findings provide conclusive activity thrusts. As such they have implications hazard area, densely populated region that hosts historical heritage, tourism facilities, industrial districts, key transportation infrastructures. Online Material: Description method used moment tensor computation, tables mechanisms recording stations, figures flux uncertainty maps epicenters.