Information on subsoil geological structure in the city of Catania (Eastern Sicily) from microtremor measurements
Nakamuras technique, or the H/V spectral ratio method, has been applied to microtremor measurements carried out in the urban area of Catania (Eastern Sicily) to obtain information on the geological structure of some sites,and to make a hypothesis on their seismic response. In general, sites located...
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| Format: | Article |
| Language: | English |
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Istituto Nazionale di Geofisica e Vulcanologia (INGV)
2001-06-01
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| Series: | Annals of Geophysics |
| Subjects: | |
| Online Access: | http://www.annalsofgeophysics.eu/index.php/annals/article/view/3606 |
| _version_ | 1819107829889368064 |
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| author | M. R. Gallipoli G. De Guidi M. Mucciarelli S. Gresta E. Giampiccolo |
| author_facet | M. R. Gallipoli G. De Guidi M. Mucciarelli S. Gresta E. Giampiccolo |
| author_sort | M. R. Gallipoli |
| collection | DOAJ |
| description | Nakamuras technique, or the H/V spectral ratio method, has been applied to microtremor measurements carried out in the urban area of Catania (Eastern Sicily) to obtain information on the geological structure of some sites,and to make a hypothesis on their seismic response. In general, sites located on soft soils or anthropic debris fillings have shown greater amplification at high frequencies (above 1 Hz). However, a strong lateral variation was observed in the frequency band, thus a denser grid of measurement points is necessary for a precise mapping of the resonant frequencies. In the low frequency range, between 0.1 and 1 Hz, a common peak around 0.2 Hz was observed. The fundamental resonant frequency inferred from the main peak in the H/V spectrum has been used to calculate the depth of the interface between the clays and the main reflector on the basis of the shear-wave velocity: it has been estimated as about 700 m. |
| first_indexed | 2024-12-22T03:00:16Z |
| format | Article |
| id | doaj.art-f5b31ee4d1ab4d8aa02d30df8c352f47 |
| institution | Directory Open Access Journal |
| issn | 1593-5213 2037-416X |
| language | English |
| last_indexed | 2024-12-22T03:00:16Z |
| publishDate | 2001-06-01 |
| publisher | Istituto Nazionale di Geofisica e Vulcanologia (INGV) |
| record_format | Article |
| series | Annals of Geophysics |
| spelling | doaj.art-f5b31ee4d1ab4d8aa02d30df8c352f472022-12-21T18:41:12ZengIstituto Nazionale di Geofisica e Vulcanologia (INGV)Annals of Geophysics1593-52132037-416X2001-06-0144110.4401/ag-3606Information on subsoil geological structure in the city of Catania (Eastern Sicily) from microtremor measurementsM. R. GallipoliG. De GuidiM. MucciarelliS. GrestaE. GiampiccoloNakamuras technique, or the H/V spectral ratio method, has been applied to microtremor measurements carried out in the urban area of Catania (Eastern Sicily) to obtain information on the geological structure of some sites,and to make a hypothesis on their seismic response. In general, sites located on soft soils or anthropic debris fillings have shown greater amplification at high frequencies (above 1 Hz). However, a strong lateral variation was observed in the frequency band, thus a denser grid of measurement points is necessary for a precise mapping of the resonant frequencies. In the low frequency range, between 0.1 and 1 Hz, a common peak around 0.2 Hz was observed. The fundamental resonant frequency inferred from the main peak in the H/V spectrum has been used to calculate the depth of the interface between the clays and the main reflector on the basis of the shear-wave velocity: it has been estimated as about 700 m.http://www.annalsofgeophysics.eu/index.php/annals/article/view/3606microtremorsH/V techniquesire responsesubsoilgeological structure |
| spellingShingle | M. R. Gallipoli G. De Guidi M. Mucciarelli S. Gresta E. Giampiccolo Information on subsoil geological structure in the city of Catania (Eastern Sicily) from microtremor measurements Annals of Geophysics microtremors H/V technique sire response subsoil geological structure |
| title | Information on subsoil geological structure in the city of Catania (Eastern Sicily) from microtremor measurements |
| title_full | Information on subsoil geological structure in the city of Catania (Eastern Sicily) from microtremor measurements |
| title_fullStr | Information on subsoil geological structure in the city of Catania (Eastern Sicily) from microtremor measurements |
| title_full_unstemmed | Information on subsoil geological structure in the city of Catania (Eastern Sicily) from microtremor measurements |
| title_short | Information on subsoil geological structure in the city of Catania (Eastern Sicily) from microtremor measurements |
| title_sort | information on subsoil geological structure in the city of catania eastern sicily from microtremor measurements |
| topic | microtremors H/V technique sire response subsoil geological structure |
| url | http://www.annalsofgeophysics.eu/index.php/annals/article/view/3606 |
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