{
"USGS Publications Warehouse": {
"@context": "https://schema.org",
"@type": "Article",
"additionalType": "Journal Article",
"name": "Regional Lg attenuation for the continental United States",
"identifier": [
{
"@type": "PropertyValue",
"propertyID": "USGS Publications Warehouse IndexID",
"value": "70019752",
"url": "https://pubs.usgs.gov/publication/70019752"
},
{
"@type": "PropertyValue",
"propertyID": "USGS Publications Warehouse Internal ID",
"value": 70019752
},
{
"@type": "PropertyValue",
"propertyID": "DOI",
"value": "10.1785/BSSA0870030606",
"url": "https://doi.org/10.1785/BSSA0870030606"
},
{
"@type": "PropertyValue",
"propertyID": "ISSN",
"value": "00371106"
}
],
"journal": {
"@type": "Periodical",
"name": "Bulletin of the Seismological Society of America",
"volumeNumber": "87",
"issueNumber": "3"
},
"inLanguage": "en",
"isPartOf": [
{
"@type": "CreativeWorkSeries",
"name": "Bulletin of the Seismological Society of America"
}
],
"datePublished": "1997",
"dateModified": "2023-10-22",
"abstract": "Measurements of the Fourier amplitude spectra of\u00a0Lg\u00a0phases recorded at high frequency (0.5 to 14.0 Hz) by broadband seismic stations are used to determine regional attenuation relationships for southern California, the Basin and Range Province, the central United States, and the northeastern United States and southeastern Canada. Fourier spectral amplitudes were measured every quarter octave from\u00a0Lg\u00a0phases windowed between 3.0 and 3.7 km sec\u22121\u00a0and recorded in the distance range of 150 to 1000 km. Attenuation at each frequency is determined by assuming a geometrical spreading exponent of 0.5 and inverting for\u00a0Q\u00a0and source and receiver terms. Both southern California and the Basin and Range Province are well described by low\u00a0Lg Q\u00a0and frequency-dependent attenuation.\u00a0Lg\u00a0spectral amplitudes in southern California are fit at low frequencies (0.625 to 0.875 Hz) by a constant\u00a0Lg Q\u00a0of 224 and by a frequency-dependent\u00a0Lg Q\u00a0function\u00a0Q\u00a0= 187\u22127+7f0.55(\u00b10.03)\u00a0in the frequency band 1.0 to 7.0 Hz. The Basin and Range Province is characterized by a constant\u00a0Lg Q\u00a0of 192 for frequencies of 0.5 to 0.875 Hz and by the frequency-dependent\u00a0Lg Q\u00a0function\u00a0Q\u00a0= 235\u221211+11f0.56(\u00b10.04)\u00a0in the frequency band 1.0 to 5.0 Hz. A change in frequency dependence above 5.0 Hz is possible due to contamination of the\u00a0Lg\u00a0window by\u00a0Pn\u00a0and\u00a0Sn\u00a0phases.\u00a0Lg\u00a0spectral amplitudes in the central United States are fit by a mean frequency-independent\u00a0Lg Q\u00a0of 1291 for frequencies of 1.5 to 7.0 Hz, while a frequency-dependent\u00a0Lg Q\u00a0of\u00a0Q\u00a0= 1052\u221283+91(f/1.5)0.22(\u00b10.06)\u00a0fits the\u00a0Lg\u00a0spectral amplitudes for the northeastern United States and southeastern Canada over the passband 1.5 to 14.0 Hz. Attenuation measurements for these areas were restricted to frequencies >1.5 Hz due to larger microseismic noise levels at the lower frequencies.",
"description": "14 p.",
"publisher": {
"@type": "Organization",
"name": "Seismological Society of America"
},
"author": [
{
"@type": "Person",
"name": "Benz, H. M.",
"givenName": "H. M.",
"familyName": "Benz"
},
{
"@type": "Person",
"name": "Frankel, A.",
"givenName": "A.",
"familyName": "Frankel",
"identifier": {
"@type": "PropertyValue",
"propertyID": "ORCID",
"value": "0000-0001-9119-6106",
"url": "https://orcid.org/0000-0001-9119-6106"
}
},
{
"@type": "Person",
"name": "Boore, D. M.",
"givenName": "D. M.",
"familyName": "Boore",
"identifier": {
"@type": "PropertyValue",
"propertyID": "ORCID",
"value": "0000-0002-8605-9673",
"url": "https://orcid.org/0000-0002-8605-9673"
}
}
],
"spatialCoverage": [
{
"@type": "Place",
"additionalType": "country",
"name": "United States",
"url": "https://geonames.org/4074035"
}
]
}
}