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Site Effects in the Pollino Region from the HVSR and Polarization of Seismic Noise and Earthquakes

2018; Seismological Society of America; Volume: 108; Issue: 1 Linguagem: Inglês

10.1785/0120170197

1943-3573

Ferdinando Napolitano, A. Gervasi, Mario La Rocca, I. Guerra, R. Scarpa,

Earthquake Detection and Analysis

Research Article| January 02, 2018 Site Effects in the Pollino Region from the HVSR and Polarization of Seismic Noise and Earthquakes Ferdinando Napolitano; Ferdinando Napolitano aDipartimento di Fisica "E. R. Caianiello", Università degli Studi di Salerno, Via Giovanni Paolo II, 132, 84084 Fisciano, Italy, fnapolitano@unisa.it Search for other works by this author on: GSW Google Scholar Anna Gervasi; Anna Gervasi bIstituto Nazionale di Geofisica e Vulcanologia, sede di Rende, Università della Calabria, Via Pietro Bucci, Arcavacata, 87036 Rende, ItalydAlso at Dipartimento di Biologia, Ecologia e Scienze della Terra, Università della Calabria, Via Pietro Bucci, Arcavacata, 87036 Rende, Italy. Search for other works by this author on: GSW Google Scholar Mario La Rocca; Mario La Rocca cDipartimento di Biologia, Ecologia e Scienze della Terra, Università della Calabria, Via Pietro Bucci, Arcavacata, 87036 Rende, Italy Search for other works by this author on: GSW Google Scholar Ignazio Guerra; Ignazio Guerra cDipartimento di Biologia, Ecologia e Scienze della Terra, Università della Calabria, Via Pietro Bucci, Arcavacata, 87036 Rende, Italy Search for other works by this author on: GSW Google Scholar Roberto Scarpa Roberto Scarpa aDipartimento di Fisica "E. R. Caianiello", Università degli Studi di Salerno, Via Giovanni Paolo II, 132, 84084 Fisciano, Italy, fnapolitano@unisa.it Search for other works by this author on: GSW Google Scholar Author and Article Information Ferdinando Napolitano aDipartimento di Fisica "E. R. Caianiello", Università degli Studi di Salerno, Via Giovanni Paolo II, 132, 84084 Fisciano, Italy, fnapolitano@unisa.it Anna Gervasi bIstituto Nazionale di Geofisica e Vulcanologia, sede di Rende, Università della Calabria, Via Pietro Bucci, Arcavacata, 87036 Rende, ItalydAlso at Dipartimento di Biologia, Ecologia e Scienze della Terra, Università della Calabria, Via Pietro Bucci, Arcavacata, 87036 Rende, Italy. Mario La Rocca cDipartimento di Biologia, Ecologia e Scienze della Terra, Università della Calabria, Via Pietro Bucci, Arcavacata, 87036 Rende, Italy Ignazio Guerra cDipartimento di Biologia, Ecologia e Scienze della Terra, Università della Calabria, Via Pietro Bucci, Arcavacata, 87036 Rende, Italy Roberto Scarpa aDipartimento di Fisica "E. R. Caianiello", Università degli Studi di Salerno, Via Giovanni Paolo II, 132, 84084 Fisciano, Italy, fnapolitano@unisa.it Publisher: Seismological Society of America First Online: 02 Jan 2018 Online Issn: 1943-3573 Print Issn: 0037-1106 © Seismological Society of America Bulletin of the Seismological Society of America (2018) 108 (1): 309–321. https://doi.org/10.1785/0120170197 Article history First Online: 02 Jan 2018 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn MailTo Tools Icon Tools Get Permissions Search Site Citation Ferdinando Napolitano, Anna Gervasi, Mario La Rocca, Ignazio Guerra, Roberto Scarpa; Site Effects in the Pollino Region from the HVSR and Polarization of Seismic Noise and Earthquakes. Bulletin of the Seismological Society of America 2018;; 108 (1): 309–321. doi: https://doi.org/10.1785/0120170197 Download citation file: Ris (Zotero) Refmanager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex toolbar search Search Dropdown Menu toolbar search search input Search input auto suggest filter your search All ContentBy SocietyBulletin of the Seismological Society of America Search Advanced Search Abstract Site effects have been studied at 15 sites in the area of Mt. Pollino (Italy) through the analysis of seismic noise and earthquakes by horizontal‐to‐vertical spectral ratios (HVSRs) and polarization methods. The HVSR method has been applied to seismic noise and to 83 local and regional earthquakes with the goal to investigate site effects in the 0.5–20 Hz frequency band. At least 20 hrs of seismic noise were selected at each site by taking into account day and night hours, and week days during several months to include any possible environmental condition. Results show stable HVSR curves characterized by small standard deviation, without high peaks at most stations. The same method was also applied to S waves and early coda waves of earthquakes, showing, for most of the sites, results very similar to the HVSR curve obtained from the seismic noise. At some sites, the HVSR is very flat, with amplitude levels between 0.7 and 2 in the entire considered frequency band. Some other sites show well‐defined peaks of amplitude up to 4.5. The relationship of site effects seen in the HVSR curves with the local structure has been further investigated through polarization analysis of seismic noise. Results indicate that topography gives the main contribution to site effects in four cases, whereas the effects possibly associated with fault zones near some stations are less obvious. You do not have access to this content, please speak to your institutional administrator if you feel you should have access.