On 20 May 2012, at 02:03:53 (UTC), Northern Italy was struck by an earthquake of magnitude Ml 5.9 (lat 44.890 long 11.230). The mainshock was preceded by a Ml 4.1 event on 19 May and followed by four relevant aftershocks with 4.8≤Ml≤ 5.1 within a few days: two events with Ml 5.1, one with Ml 4.9 and one with Ml 4.8. Eleven events with magnitude 4.0 ≤ Ml ≤ 4.5, plus several other minor earthquakes, occurred in the same area from 20 to 23 May, as reported in Italian Instrumental and Parametric Data- Base (ISIDe) available at http://iside.rm.ingv.it/iside/standard/index.jsp. The seismic sequence covered a large area extending in the E-W direction for a length of nearly 40 km, between the localities of Mirandola and Ferrara, close to the buried front of Ferrara-Romagna northward-verging active thrust belt. Seven stations of the Italian strong motion network (RAN), managed by the National Civil Protection Department (DPC), were operating within 50 km from the the mainshock epicentre (Figs. 1 and 2B). The RAN stations recorded the strong motions of the mainshock, as well as of the foreshock and of the aftershocks of magnitude Ml ≥ 4.0. Soon after the mainshock, the DPC began to install further stations to increase the network coverage in the epicentral area involved by the aftershocks in sites of particular interest for Civil Protection purposes. This report is aimed at: 1- providing the mainshock waveforms to engineers, geophysicists geologists and scientists in general, for professional, technical works and scientific purposes; 2- showing the spatial distribution and geological setting of the temporary accelerometric network, consisting of 13 stations installed within the epicentral area. Such temporary network represents an extension of the permanent Italian strong motion one and is aimed at supporting the emergency response by the civil protection authorities by improving the network coverage. Two of the new stations (Cento and Carpi) must be considered as permanent
The Emilia Thrust Earthquake of 20 May 2012 (Northern Italy): Strong Motion and Geological Observations – Report I
COSTA, GIOVANNI;GALLO, ANTONELLA;TIBERI, LARA;ZOPPÈ, GIULIANA;SUHADOLC, PETER;
2012-01-01
Abstract
On 20 May 2012, at 02:03:53 (UTC), Northern Italy was struck by an earthquake of magnitude Ml 5.9 (lat 44.890 long 11.230). The mainshock was preceded by a Ml 4.1 event on 19 May and followed by four relevant aftershocks with 4.8≤Ml≤ 5.1 within a few days: two events with Ml 5.1, one with Ml 4.9 and one with Ml 4.8. Eleven events with magnitude 4.0 ≤ Ml ≤ 4.5, plus several other minor earthquakes, occurred in the same area from 20 to 23 May, as reported in Italian Instrumental and Parametric Data- Base (ISIDe) available at http://iside.rm.ingv.it/iside/standard/index.jsp. The seismic sequence covered a large area extending in the E-W direction for a length of nearly 40 km, between the localities of Mirandola and Ferrara, close to the buried front of Ferrara-Romagna northward-verging active thrust belt. Seven stations of the Italian strong motion network (RAN), managed by the National Civil Protection Department (DPC), were operating within 50 km from the the mainshock epicentre (Figs. 1 and 2B). The RAN stations recorded the strong motions of the mainshock, as well as of the foreshock and of the aftershocks of magnitude Ml ≥ 4.0. Soon after the mainshock, the DPC began to install further stations to increase the network coverage in the epicentral area involved by the aftershocks in sites of particular interest for Civil Protection purposes. This report is aimed at: 1- providing the mainshock waveforms to engineers, geophysicists geologists and scientists in general, for professional, technical works and scientific purposes; 2- showing the spatial distribution and geological setting of the temporary accelerometric network, consisting of 13 stations installed within the epicentral area. Such temporary network represents an extension of the permanent Italian strong motion one and is aimed at supporting the emergency response by the civil protection authorities by improving the network coverage. Two of the new stations (Cento and Carpi) must be considered as permanentPubblicazioni consigliate
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