eprintid: 1810 rev_number: 11 eprint_status: archive userid: 6 dir: disk0/00/00/18/10 datestamp: 2017-01-03 12:51:20 lastmod: 2017-02-08 12:21:34 status_changed: 2017-01-03 12:51:20 type: article metadata_visibility: show creators_name: Ganas, Athanassios creators_name: Roumelioti, Zafeiria creators_name: Chousianitis, Konstantinos corp_creators: National Observatory of Athens, Institute of Geodynamics, Athens, Greece corp_creators: Aristotle University of Thessaloniki, Department of Civil Engineering, Laboratory of Soil Mechanics, Foundations and Geotechnical Earthquake Engineering, Thessaloniki, Greece corp_creators: National Observatory of Athens, Institute of Geodynamics, Athens, Greece title: Static stress transfer from the May 20, 2012, M 6.1 Emilia-Romagna (northern Italy) earthquake using a co-seismic slip distribution model subjects: MP1 subjects: MP6_1 subjects: RIt1 subjects: SHC divisions: IP8 full_text_status: none keywords: Stress Transfer; Slip distribution; Italy abstract: We model the static stress transfer for the May 2012 northern Italy earthquakes, assuming that failure of the crust occurs by shear. This allows the mechanics of the process to be approximated by the Okada (1992) expressions for displacement and strain fields due to a finite rectangular source in an elastic, homogeneous and isotropic half-space. The slip model of the May 20, 2012, earthquake was derived using empirical Green’s functions and a least-squares inversion scheme of source time functions computed from regional broadband seismological data. The derived model is then incorporated into the computation of Coulomb stress change (ΔCFF) to investigate the possibility that the May 20, 2012, M 6.1 event triggered the second earthquake that occurred on May 29, 2012 (M 5.9). We calculate the Coulomb stress changes for both: (a) optimally oriented planes to regional compression; and (b) planes of fixed orientation assuming that E-W striking, south-dipping thrust faults of the May 29, 2012, type of rupture was a candidate for failure. In both cases, we find that the triggering is promoted as the ΔCFF values in the hypocentral area of the May 29, 2012, earthquake are positive (between 0.61-0.74 bar). date: 2012 date_type: published publication: Annals of Geophysics volume: 55 number: 4 publisher: Istituto Nazionale di Geofisica e Vulcanologia (INGV) pagerange: 655-662 id_number: DOI: 10.4401/ag-6176 issn: 1593-5213 official_url: http://doi.org/10.4401/ag-6176 access_IS-EPOS: limited owner: Publisher citation: Ganas, Athanassios and Roumelioti, Zafeiria and Chousianitis, Konstantinos (2012) Static stress transfer from the May 20, 2012, M 6.1 Emilia-Romagna (northern Italy) earthquake using a co-seismic slip distribution model. Annals of Geophysics, 55 (4). pp. 655-662. DOI: https://doi.org/10.4401/ag-6176