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The active faults bordering the Lunigiana and Garfagnana grabens (Northern Apennine): New constraints from knickpoint analysis
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Seimotectonics analysis of the Lunigiana and Garfagnana extensional basins (Northern Tuscany, Italy)
No full textMultidisciplinary seismotectonics of a low-angle normal fault system (Lunigiana- Garfagnana grabens, Italy)
No full textLANFs attive erelativi meccanismi di trasferimento alla terminazione settentrionale dell’Etrurian Fault System (Lunigiana-Garfagnana, Italia)
No full textA multidisciplinary approach to the seismotectonics of the Lunigiana and Garfagnana extensional basins (Northern Tuscany, Italy)
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Seismic amplification in a fractured rock site. The case study of San Gregorio (L'Aquila, Italy)
No full textThe village of San Gregorio (SG), eight kilometres away from L'Aquila (central Italy), was severely damaged by the April 6, 2009 L'Aquila earthquake (MW 6.1). A coseismic fracture zone was mapped along SW-dipping fault segments crossing SG, which is situated at the base of a carbonate relief bounded by the Aterno river alluvial plain. An interdisciplinary approach was used to investigate the seismic response of the area based on geological-structural, geophysical and seismic analyses. We integrated our data with available information from the recent microzonation studies. SG is partly built on alluvial fan deposits constituted by cemented gravel, and partly on jointed carbonate bedrock. An extensive survey of noise measurements showed strong and polarized peaks in the horizontal-to-vertical spectral ratios (H/V), both on soft and rock sites in the 2e10 Hz frequency band. Further, we checked the stability with time of H/V ratios at three sites of SG. An analysis on local earthquakes confirmed the results of noise measurements. To understand the influence of rock mass jointing condition on site effects, we performed structural surveys on carbonate bedrock. We also evaluated the propagation velocities at rock sites using seismic active and seismic dilatometer test (SDMT) surveys. Our analysis showed low values of compressional (VP) and shear wave (VS) velocities of the outcropping rock, where we also observed strong H/V spectral peak and high-density rock fracturing
Going Beyond Counting First Authors in Author Co-citation Analysis
Get PDFThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
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