| Autor: |
De Guidi, Giorgio, Vecchio, Alessia, Brighenti, Fabio, Caputo, Riccardo, Carnemolla, Francesco, Di Pietro, Adriano, Lupo, Marco, Maggini, Massimiliano, Marchese, Salvatore, Messina, Danilo, Monaco, Carmelo, Naso, Salvatore |
| Předmět: |
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| Zdroj: |
Natural Hazards & Earth System Sciences Discussions; 2017, p1-11, 11p |
| Abstrakt: |
On October 26th 2016, immediately north of the epicentral area affected by the Mw 6.0, August 24th earthquake, a strong earthquake (Mw = 5.9), with a focal mechanism showing W-dipping normal faulting, occurred at the boundary between Marche and Umbria regions (central Apennines, Italy). Four days later (on October 30th), the main-shock (Mw = 6.5) of the whole seismic sequence occurred in the same area. The central Apennines are characterized by northeast-verging thrust-propagation folds, involving Mesozoic- Tertiary sedimentary successions. During the 2016 sequence, coseismic deformation has been recorded at the rear of the Sibillini Thrust which separates the main mountain chain from the Marche-Abruzzi foothills (Fig. 1). This contractional structure has been partly dissected and/or inverted by NNW-SSE trending Quaternary normal and oblique-slip faults. The major event (October 30) induced extensive geological effects at the surface and structural damages in the broader epicentral area up to a distance of 30 km. According to the report of the Istituto Nazionale di Geofisica e Vulcanologia (SUMMARY REPORT ON THE 30 OCTOBER, 2016 EARTHQUAKE IN CENTRAL ITALY Mw 6.5, Gruppo di Lavoro INGV sul Terremoto in centro Italia 10 November 2016), the hypocenter of major event was located at 42.8322° N, 13.1107° E at a depth of 9.2 km (Figs. 1 and 2). Following the August seismic events, we installed five new geodetic points located on both sides of the principal fracture zone and carried out two campaigns of GNSS measurements, the first one at the end of September (30-09/02-10, 2016), the second one early November (11/13-11, 2016) that covered the period of the October events. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
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