@prefix rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#> .
@prefix rdfs: <http://www.w3.org/2000/01/rdf-schema#> .
@prefix schema: <http://schema.org/> .
@prefix xml: <http://www.w3.org/XML/1998/namespace> .
@prefix xsd: <http://www.w3.org/2001/XMLSchema#> .

<https://data.ingv.it/dataset/861> a schema:Dataset ;
    schema:about [ a schema:Thing ;
            schema:name "42" ;
            schema:url "https://data.ingv.it/person/42" ],
        [ a schema:Thing ;
            schema:name "41" ;
            schema:url "https://data.ingv.it/person/41" ],
        [ a schema:Thing ;
            schema:name "3573" ;
            schema:url "https://data.ingv.it/person/3573" ],
        [ a schema:Thing ;
            schema:name "scienza" ;
            schema:url "https://data.ingv.it/person/scienza" ],
        [ a schema:Thing ;
            schema:name "3574" ;
            schema:url "https://data.ingv.it/person/3574" ],
        [ a schema:Thing ;
            schema:name "3572" ;
            schema:url "https://data.ingv.it/person/3572" ] ;
    schema:dateModified "16-11-2022",
        "2022-11-16T00:00:00" ;
    schema:datePublished "10-11-2022",
        "2022-10-11T00:00:00" ;
    schema:description "The raw seismic data is band-pass filtered between 1.0-2.0 Hz, down-sampled from 100 to 20 Hz, and de-trended. Daily traces is segmented into 1-hr windows, winsorizing (clipping) at 3 Root Mean Square (RMS), and spectral whitening in the 1.0–2.0 Hz frequency band is applied before cross-correlation (Bensen et al., 2007; Lecocq et al., 2014). The resulting daily CCFs are then stacked using the time-frequency phase-weighted stacking method (tf-PWS; Schimmel & Paulssen, 1997) for 1,5,10,30 days for each station pair to increase the signal-to-noise-ratio. The reference period spans between 2017-01-01 and 2017-12-31. Daily variations in seismic velocity are computed using the Moving Window Cross-Spectrum analysis (MWCS; Ratdomopurbo & Poupinet, 1995) between a daily and a reference CCF. The resulting time series for each possible pair of stations on Etna volcano are finally combined in a single median variation of seismic velocity for the network." ;
    schema:identifier "10.13127/etnadvvnoise/v1.0" ;
    schema:inLanguage "ITA" ;
    schema:includedInDataCatalog [ a schema:DataCatalog ;
            schema:description "<span lang=\"it\"><big>Portale dei dati aperti</big></span> <span lang=\"en\"><big>Open Data Portal</big></span>" ;
            schema:name "ISTITUTO NAZIONALE DI GEOFISICA E VULCANOLOGIA" ;
            schema:url "https://data.ingv.it" ] ;
    schema:keywords "vulcani" ;
    schema:license "http://www.opendefinition.org/licenses/cc-by" ;
    schema:name "Seismic velocity variation at Mt. Etna calculated by seismic ambient noise interferometry (EtnadVv)" ;
    schema:publisher <https://data.ingv.it/organization/ingv> ;
    schema:spatialCoverage [ a schema:Place ;
            schema:geo [ a schema:GeoShape ;
                    schema:polygon "{\"type\":\"Polygon\",\"coordinates\":[[[14.7601318359375,37.89744480797279],[15.25726318359375,37.895277416654835],[15.260009765625,37.56726967170569],[14.757385253906252,37.57597734448727],[14.7601318359375,37.89744480797279]]]}" ] ] ;
    schema:url "https://data.ingv.it/dataset/861" ;
    schema:version "1.0" .

<https://data.ingv.it/organization/ingv> a schema:Organization ;
    schema:contactPoint [ a schema:ContactPoint ;
            schema:contactType "customer service" ;
            schema:name "Istituto Nazionale di Geofisica e Vulcanologia (INGV)" ;
            schema:url "https://data.ingv.it" ] ;
    schema:name "Istituto Nazionale di Geofisica e Vulcanologia (INGV)" .