کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
4692038 1636768 2014 12 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
The 2012 Emilia seismic sequence (Northern Italy): Imaging the thrust fault system by accurate aftershock location
ترجمه فارسی عنوان
ترتیب لرزه ای امیلیا 2012 (شمال ایتالیا): تصویربرداری سیستم خطای محرک توسط مکان پس لرزه ای دقیق
کلمات کلیدی
زلزله شناسی، محل حادثه، توالی لرزه ای، مدل سرعت سیستم خطای محرک دشت آلوویو
موضوعات مرتبط
مهندسی و علوم پایه علوم زمین و سیارات فرآیندهای سطح زمین
چکیده انگلیسی


• First complete analysis of the 2012 Emilia mainshocks–aftershocks seismic sequence.
• New catalog of the seismic sequence including data from temporary stations
• Sensible improvement in terms of the activated fault system geometry definition
• The different dip of the activated fault segments is highlighted and discussed.
• Basic information are provided for further specific studies and hazard scenarios.

Starting from late May 2012, the Emilia region (Northern Italy) was severely shaken by an intense seismic sequence, originated from a ML 5.9 earthquake on May 20th, at a hypocentral depth of 6.3 km, with thrust-type focal mechanism. In the following days, the seismic rate remained high, counting 50 ML ≥ 2.0 earthquakes a day, on average. Seismicity spreads along a 30 km east–west elongated area, in the Po river alluvial plain, in the nearby of the cities Ferrara and Modena. Nine days after the first shock, another destructive thrust-type earthquake (ML 5.8) hit the area to the west, causing further damage and fatalities. Aftershocks following this second destructive event extended along the same east-westerly trend for further 20 km to the west, thus illuminating an area of about 50 km in length, on the whole. After the first shock struck, on May 20th, a dense network of temporary seismic stations, in addition to the permanent ones, was deployed in the meizoseismal area, leading to a sensible improvement of the earthquake monitoring capability there. A combined dataset, including three-component seismic waveforms recorded by both permanent and temporary stations, has been analyzed in order to obtain an appropriate 1-D velocity model for earthquake location in the study area. Here we describe the main seismological characteristics of this seismic sequence and, relying on refined earthquakes location, we make inferences on the geometry of the thrust system responsible for the two strongest shocks.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Tectonophysics - Volume 622, 21 May 2014, Pages 44–55
نویسندگان
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